CN109869276B - Double-duct vertical axis wind turbine - Google Patents
Double-duct vertical axis wind turbine Download PDFInfo
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- CN109869276B CN109869276B CN201711431665.8A CN201711431665A CN109869276B CN 109869276 B CN109869276 B CN 109869276B CN 201711431665 A CN201711431665 A CN 201711431665A CN 109869276 B CN109869276 B CN 109869276B
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- 238000005192 partition Methods 0.000 claims description 15
- 230000008878 coupling Effects 0.000 claims description 11
- 238000010168 coupling process Methods 0.000 claims description 11
- 238000005859 coupling reaction Methods 0.000 claims description 11
- 230000009977 dual effect Effects 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims 1
- 238000010248 power generation Methods 0.000 abstract description 3
- 238000012423 maintenance Methods 0.000 description 6
- 208000025274 Lightning injury Diseases 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/728—Onshore wind turbines
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/74—Wind turbines with rotation axis perpendicular to the wind direction
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Abstract
The embodiment of the invention relates to the field of wind power generation, and provides a double-duct vertical axis wind turbine, which mainly comprises: the double-duct vertical axis wind driven generator is characterized by comprising an outer duct, an inner duct, a butterfly valve cabin, an impeller cabin, a pressure cabin, a generator cabin, an inner duct guide plate and an outer duct guide plate, wherein wind energy is acquired and absorbed through the outer duct and the inner duct, then the impeller of equipment in the impeller cabin is used for converting the wind energy into mechanical energy, the generator of equipment in the generator cabin is used for converting the mechanical energy into electric energy, the pressure cabin and the butterfly valve cabin are used for controlling the starting and stopping of the double-duct vertical axis wind driven generator and the output load, and the inner duct guide plate and the outer duct guide plate are mainly used for dividing airflow from all directions.
Description
Technical Field
The invention relates to the field of wind power generation, in particular to a high-efficiency low-cost wind generating set.
Background
With the development of wind power generation technology, the wind power generator set on the conventional three-blade horizontal shaft has the problems that the wind power generator set on the conventional three-blade horizontal shaft has a complicated structure, the wind power utilization rate can only reach about 0.45, important parts such as a generator, a gear box, a converter and the like are damaged and replaced frequently, and the later maintenance cost is high, so that the conventional wind power generator has the problems of high construction cost, long cost recovery time, large later maintenance workload and the like, such as slight deviation of site selection and unit selection of a wind power plant, addition of factors such as power limiting and the like, and the phenomenon of loss occurs in the later operation of the wind power plant.
Disclosure of Invention
The invention aims to provide a double-duct vertical axis wind driven generator, which solves the problems of low wind energy utilization rate, high construction cost, higher later maintenance cost and the like of the existing wind driven generator.
In one aspect of the embodiment of the invention, a double-duct vertical axis wind turbine is provided, which comprises an outer duct, an inner duct, a butterfly valve cabin, an impeller cabin, a pressure cabin, a generator cabin, an inner duct guide plate and an outer duct guide plate.
The outer duct is used for absorbing wind energy and improving airflow velocity, the outer duct is polygonal in shape of an upper bottom surface and a lower bottom surface, the side edges are similar to the edge tables of combined lines of straight lines and curves, or the upper bottom surface and the lower bottom surface are circular, and the bus is similar to the circular tables of the combined lines of the straight lines and the curves; the outer duct shell, the inner duct shell, the butterfly valve cabin shell and the impeller cabin shell are connected together by the outer duct partition plates to form a plurality of outer duct sub-ducts for receiving wind energy from different directions; the outer duct is formed by the collection of the outer duct sub-ducts, the upper bottom surface of the outer duct and the lower bottom surface of the outer duct are parallel to the ground plane, and the area of the lower bottom surface of the outer duct is smaller than that of the upper bottom surface of the outer duct.
The inner channel is used for absorbing wind energy to enable negative pressure to be generated in the inner channel, the impeller cabin air flow is pulled to be discharged upwards, and the impeller is driven to rotate to generate energy; the shape of the inner channel is a similar prismatic table with the upper bottom surface and the lower bottom surface being polygonal, the lateral edges being combined lines of straight lines and curves, or the upper bottom surface and the lower bottom surface being circular, and the generatrix being a similar truncated cone with combined lines of straight lines and curves; the inner culvert is divided into a plurality of inner culvert sub-culverts by the inner culvert partition plates so as to improve the wind energy utilization rate; the inner culvert is characterized in that the inner culvert is assembled by the inner culvert, the upper bottom surface of the inner culvert and the lower bottom surface of the inner culvert are parallel to the ground plane, the area of the lower bottom surface of the inner culvert is smaller than that of the upper bottom surface of the inner culvert, and the inner culvert is nested in the outer culvert shell; the upper bottom surface of the inner culvert is an inner culvert air flow outlet, and the lower bottom surface of the inner culvert is an inner culvert air flow inlet.
Optionally, the butterfly valve cabin is hollow cylinder structure, the butterfly valve cabin is installed in interior culvert below, butterfly valve cabin upper bottom surface with interior culvert lower bottom surface is connected, butterfly valve cabin shell with outer culvert baffle is connected.
The impeller cabin is of a hollow cylinder structure, the upper bottom surface of the impeller cabin is connected with the lower bottom surface of the butterfly valve cabin, the impeller cabin shell is connected with the outer duct partition plate, an impeller is arranged in the center of the impeller cabin, the impeller converts energy generated by the outer duct airflow and energy generated by the negative pressure of the inner duct into mechanical energy, and the impeller consists of an impeller shaft and a plurality of layers of blades and can fully absorb the energy generated by the airflow of the impeller cabin; the impeller shaft is of a hollow cylinder structure and is perpendicular to the ground plane; the impeller bracket is arranged on the upper bottom surface of the impeller cabin and is used for installing and positioning the impeller, so that the impeller can stably operate for a long time.
The pressure cabin is used for controlling the starting and stopping of the double-duct vertical axis wind turbine by controlling the opening and closing of guide vanes, controlling the load of the double-duct vertical axis wind turbine by controlling the opening and closing amplitude of the guide vanes, and is arranged on the side surface of the pressure cabin and at the air outlet of the outer duct and used for controlling the air flow entering the pressure cabin from the outer duct, and the pressure cabin is arranged below the impeller cabin, and the upper bottom surface of the pressure cabin is connected with the lower bottom surface of the impeller cabin; the pressure cabin is of a hollow structure, and air flow can enter the impeller cabin through the upper bottom surface of the pressure cabin.
The generator cabin is positioned at the bottom of the double-duct vertical axis wind driven generator, the lower bottom surface of the generator cabin is connected with the ground level, the upper bottom surface of the generator cabin is a duct bottom platform, and the upper bottom surface of the generator cabin is connected with the outer duct and the pressure cabin; a manhole is formed in the culvert bottom platform, and a worker can enter the outer culvert through the manhole during maintenance and overhaul to finish overhaul of equipment, and the manhole is in a closed state at other times; the generator cabin is provided with a generator cabin door, and workers can enter the generator cabin through the generator cabin door; the upper bottom surface of the generator cabin and the lower bottom surface of the generator cabin are polygonal or circular.
The inner channel guide plate can divide the air flow from different directions, the air flow above the inner channel guide plate passes through the upper bottom surface of the inner channel, and the air flow below the inner channel guide plate enters the outer channel; the inner channel guide plate is connected with the inner channel shell.
The outer duct guide plate can divide the air flow from different directions, the air flow above the outer duct guide plate enters the outer duct, and the air flow below the outer duct guide plate flows away along with the external air flow; the outer duct guide plate is connected with the outer duct shell.
Optionally, the impeller compartment comprises: the impeller shaft is sleeved in the impeller bearing at the upper end face, so that the impeller can normally rotate.
Optionally, the butterfly valve pod includes: and the opening and closing of the butterfly valve can be communicated with and block the air flow of the impeller cabin from entering the inner culvert, so that the operation or stop of the double-culvert vertical axis wind driven generator is controlled.
Optionally, the outer duct comprises: the outer duct sub-duct pressure sensors are arranged on the lower bottom surface of the outer duct, and each outer duct sub-duct is provided with one outer duct sub-duct pressure sensor.
Optionally, the content channel includes: the wind vane is arranged on the inner culvert partition plate at the center of the upper bottom surface of the inner culvert, is used for detecting the current wind speed and the current wind direction and transmitting data to the PLC control system, and the PLC control system determines whether each outer culvert is in a windward side or a leeward side or not through the obtained wind speed and wind direction data, and whether the double-culvert vertical axis wind driven generator is started or stopped.
Optionally, the content channel further comprises: the lightning rod can lead lightning into the ground through the inner duct partition board, the inner duct shell, the outer duct partition board and the generator cabin when equipment encounters lightning, so that the equipment is prevented from being damaged by lightning.
Optionally, the pressure chamber comprises: and the pressure sensor of the pressure cabin is used for detecting the air pressure of the pressure cabin and sending the pressure data to the PLC control system.
Optionally, the generator module includes: the generator is arranged in the generator cabin, is connected with the impeller shaft through a coupler or is connected with the coupler through a gear box, the coupler is connected with the impeller shaft, the generator can convert energy generated by the impeller into electric energy, and the generator is provided with a temperature sensor and can send the temperature data of the generator to the PLC control system; if the generator is a direct-drive generator, the generator is connected with the impeller shaft through the coupler, the gear box is removable, and if the generator is a non-direct-drive generator, the generator is connected with the gear box, and the gear box is connected with the impeller shaft through the coupler.
Optionally, the generator module includes: the gear box is arranged between the impeller shaft and the generator and is used for increasing the rotating speed of the generator, the gear box can be installed or removed according to different types of the generator, when the generator is a direct-drive generator, the gear box can be removed, and when the generator is a non-direct-drive generator, the gear box needs to be installed.
Optionally, the generator module includes: the impeller rotating speed sensor is arranged on the culvert bottom platform and used for detecting the rotating speed of the impeller and transmitting data to the PLC control system.
Optionally, the generator module further includes: a coupling is mounted between the generator shaft and the impeller shaft or between the impeller shaft and the gearbox for transmitting torque generated by the impeller to the generator.
Optionally, the generator module further includes: the guide vane oil cylinder is arranged on the culvert bottom platform and connected with a guide vane arm of force to provide power for opening and closing of the guide vane.
Optionally, the generator module further includes: the guide vane arm of force, guide vane arm of force one end with the guide vane hydro-cylinder is connected, one end with the guide vane is connected, can with the linear displacement that the guide vane hydro-cylinder produced is converted into moment of torsion, drives the guide vane is rotatory.
Optionally, the generator module further includes: the PLC control system is arranged in the generator cabin, can detect all sensor signals of the double-duct vertical axis wind turbine and controls the normal operation of the double-duct vertical axis wind turbine; the PLC control system is provided with a communication interface, and can provide data and receive external instructions.
Optionally, the generator module further includes: the hydraulic station is arranged inside the generator cabin and controlled by the PLC control system, and the hydraulic station can provide pressure oil for the guide vane oil cylinder and the butterfly valve.
Optionally, the generator module further includes: the electric control cabinet is arranged in the generator cabin, is controlled by the PLC control system, and is responsible for grid connection and excitation of the generator and converts electric energy generated by the generator into three sine alternating currents which can be connected in a grid.
Optionally, the generator module further includes: and the generator rotating speed sensor is arranged on the generator and used for detecting the rotating speed of the generator and sending the rotating speed data of the generator to the PLC control system.
Optionally, the generator module further includes: the generator cabin radiator, the generator cabin radiator cold junction is installed inside the generator cabin, the generator cabin radiator hot junction is installed the generator cabin is outside, is used for all equipment cooling in the generator cabin, guarantees all equipment normal operating in the generator cabin.
Optionally, the generator module further includes: the impeller bearing of the lower end face is arranged at the center of the culvert bottom platform on the upper bottom surface of the generator cabin and used for positioning and mounting the impeller, so that the impeller can be positioned at the center line of the impeller cabin and stably rotate.
Optionally, the generator module further includes: the impeller locking device is arranged on the impeller shaft in the generator cabin and can be used for locking the impeller during equipment maintenance.
Description of the drawings:
the invention will be better understood from the following description of specific embodiments thereof, taken in conjunction with the accompanying drawings, in which:
other features, objects and advantages of the present invention will become more apparent upon reading the following detailed description of non-limiting embodiments, taken in conjunction with the accompanying drawings, in which like or similar reference characters designate like or similar features.
FIG. 1 is a three-view and related sectional view of a dual-duct vertical axis wind turbine;
FIG. 2 is a front view of a dual duct vertical axis wind turbine;
FIG. 3 is a top view of a dual duct vertical axis wind turbine;
FIG. 4 is a left side view of a dual duct vertical axis wind turbine;
FIG. 5 is a cross-sectional view A-A of FIG. 1;
FIG. 6 is a cross-sectional view B-B of FIG. 1;
FIG. 7 is a cross-sectional view of C-C of FIG. 1;
fig. 8 is a sectional view D-D of fig. 1.
In the figure:
101. an outer duct; 102. an outer duct housing; 103. the upper bottom surface of the outer duct; 104. an outer duct airflow inlet; 105. an outer duct sub-duct; 106. an outer duct partition; 107. the lower bottom surface of the outer duct; 108. an outer duct airflow outlet; 109. an outer duct sub-duct pressure sensor.
201. An inner duct sub-duct; 202. an inner channel separator; 203. the upper bottom surface of the inner duct; 204. the lower bottom surface of the inner duct; 205. an inner culvert casing; 206. an inner duct; 207. an inner duct airflow inlet; 208. an outlet port for the passage air; 209. anemometer vane; 210. a lightning rod.
301. The upper bottom surface of the butterfly valve cabin; 302. butterfly valve; 304. butterfly valve cabin; 305. the lower bottom surface of the butterfly valve cabin; 306. butterfly valve cabin shell.
401. An impeller support; 402. the upper bottom surface of the impeller cabin; 403. an upper end face impeller bearing; 404. an impeller compartment; 405. an impeller pod housing; 406. the lower bottom surface of the impeller cabin; 407. an impeller; 408. an impeller shaft; 409. and (3) a blade. 501. The upper bottom surface of the pressure cabin; 502. a guide vane support; 503. a guide vane; 504. the lower bottom surface of the pressure cabin; 505. a pressure chamber; 506. a pressure cabin pressure sensor.
601. The upper bottom surface of the generator cabin; 602. a culvert bottom platform; 603. a lower end face impeller bearing; 604. a coupling; 605. a generator rotation speed sensor; 606. a generator cabin door; 607. a hydraulic station; 608. a generator compartment; 609. a generator; 610. an electric control cabinet; 611. a PLC control system; 612. a guide vane cylinder; 617. a manhole; 618. the lower bottom surface of the generator cabin; 619. a ground plane; 620. a guide vane moment arm; 621. generator cabin radiator; 622. a generator shaft; 623. an impeller locking device; 624. a gear box; 625. an impeller rotation speed sensor.
703. An internal channel guide plate.
801. An outer duct deflector.
The specific embodiment is as follows:
features and exemplary embodiments of various aspects of the invention are described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the invention by showing examples of the invention. The present invention is in no way limited to any particular configuration and algorithm set forth below, but rather covers any modification, substitution, and improvement of elements, components, and algorithms without departing from the spirit of the invention. In the drawings and the following description, well-known structures and techniques have not been shown in order to avoid unnecessarily obscuring the present invention.
Example embodiments will now be described more fully with reference to the accompanying drawings. However, the illustrated embodiments may be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. In the drawings, the thickness of regions and layers may be exaggerated for clarity. The same reference numerals in the drawings denote the same or similar structures, and thus detailed descriptions thereof will be omitted.
Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the invention. One skilled in the relevant art will recognize, however, that the inventive aspects may be practiced without one or more of the specific details, or with other methods, components, materials, etc. In other instances, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring the main technical idea of the invention.
In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; may be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present invention can be understood as appropriate by those of ordinary skill in the art.
Technical terms related to the embodiment of the invention:
negative pressure: below atmospheric pressure.
Polygonal: the graph consists of a plurality of straight lines connected end to end, or consists of a plurality of curves connected end to end, or consists of a plurality of straight lines and a plurality of curves connected end to end.
1-8, a dual-bypass vertical axis wind turbine provided by an embodiment of the present invention includes:
the outer duct 101 is used for absorbing wind energy and improving airflow velocity, the outer duct 101 is polygonal in shape of an upper bottom surface and a lower bottom surface, the side edges are similar to a prismatic table of a combined line of a straight line and a curve, or the upper bottom surface and the lower bottom surface are circular, and the bus is similar to a truncated cone of the combined line of the straight line and the curve; the outer duct clapboards 106 connect the outer duct shell 102, the inner duct shell 205, the butterfly valve cabin shell 306 and the impeller cabin shell 405 together to form a plurality of outer duct sub-ducts 105 for receiving wind energy from different directions; the collection of outer duct sub-ducts 105 forms an outer duct 101, the outer duct upper bottom surface 103 and the outer duct lower bottom surface 107 are parallel to the ground plane 619, and the area of the outer duct lower bottom surface 107 is smaller than the area of the outer duct upper bottom surface 103.
The inner duct 206 is used for absorbing wind energy, so that negative pressure is generated in the inner duct 206, and the air flow in the impeller cabin 404 is pulled to be discharged upwards, so that the impeller 407 is driven to rotate to generate energy; the shape of the inner duct 206 is a similar prismatic table with the upper bottom surface and the lower bottom surface being polygonal, the side edges being combined lines of straight lines and curves, or the upper bottom surface and the lower bottom surface being circular, and the generatrix being a similar truncated cone with combined lines of straight lines and curves; the inner culvert 206 is divided into a plurality of inner culvert sub-culverts 201 by the inner culvert separators 202 to improve the wind energy utilization rate, and the inner culvert sub-culverts 201 are collected into an inner culvert 206; the inner culvert upper bottom surface 203 and the inner culvert lower bottom surface 204 are parallel to the ground plane 619, and the area of the inner culvert lower bottom surface 204 is smaller than the area of the inner culvert upper bottom surface 203; the inner duct 206 is nested inside the outer duct housing 102; the inner duct upper bottom surface 203 is an inner duct airflow outlet 208, and the inner duct lower bottom surface 204 is an inner duct airflow inlet 207.
The butterfly valve cabin 304 is of a hollow cylinder structure, the butterfly valve cabin 304 is arranged below the inner culvert 206, the upper bottom surface 301 of the butterfly valve cabin is connected with the lower bottom surface 204 of the inner culvert, and the butterfly valve cabin shell 306 is connected with the outer culvert baffle 106.
The impeller cabin 404 is of a hollow cylinder structure, the upper bottom surface 402 of the impeller cabin is connected with the lower bottom surface 305 of the butterfly valve cabin, the impeller cabin shell 405 is connected with the outer duct partition plate 106, the impeller 407 is arranged in the center of the impeller cabin 404, the impeller 407 converts energy generated by air flow in the outer duct 101 and energy generated by negative pressure in the inner duct 206 into mechanical energy, and the impeller 407 consists of an impeller shaft 408 and a plurality of layers of blades 409 and can fully absorb energy generated by air flow in the impeller cabin 404; the impeller shaft 408 is a hollow cylindrical structure and is perpendicular to the ground plane 619; the impeller bracket 401 is installed on the upper bottom surface 402 of the impeller cabin and is used for installing and positioning the impeller 407, so that the impeller 407 can stably operate for a long time.
The pressure cabin 505 is a load adjusting device of a double-duct vertical axis wind turbine provided by an embodiment of the invention, the pressure cabin 505 controls the start and stop of the double-duct vertical axis wind turbine provided by the embodiment of the invention by controlling the opening and closing of the guide vanes 503, the pressure cabin 505 controls the load of the double-duct vertical axis wind turbine provided by the embodiment of the invention by controlling the opening and closing amplitude of the guide vanes 503, the guide vanes 503 are arranged at the outer duct airflow outlets 108 on the side surfaces of the pressure cabin 505, each outer duct sub-duct 105 corresponds to one guide vane 503 and is used for controlling the airflow rate entering the pressure cabin 505 from the outer duct 101, the pressure cabin 505 is arranged below the impeller cabin 404, and the upper bottom surface 501 of the pressure cabin is connected with the lower bottom surface 406 of the impeller cabin; the pressure chamber 505 is hollow and the air flow can enter the impeller chamber 404 through the upper bottom surface 501 of the pressure chamber.
The generator cabin 608 is positioned at the bottom of a double-duct vertical axis wind turbine provided by an embodiment of the invention; the lower bottom surface 618 of the generator cabin is connected with the ground plane 619, the upper bottom surface 601 of the generator cabin is a culvert bottom platform 602, and the upper bottom surface 601 of the generator cabin is connected with the outer culvert 101 and the pressure cabin 505; when the manhole 617 is arranged on the culvert bottom platform 602 for maintenance and repair, a worker can enter the outer culvert 101 through the manhole 617 to complete equipment repair, and the manhole 617 is in a closed state at other times, and the culvert bottom platform 602 is not communicated with the outer culvert 101 and the pressure cabin 505 and cannot pass through air flow; generator compartment 608 is fitted with a generator compartment door 606 through which a worker may enter generator compartment 608; the upper and lower generator pod floors 601 and 618 are polygonal or circular.
The inner channel guide plate 703 can divide the air flows from different directions, the air flow above the inner channel guide plate 703 passes through the upper bottom surface 203 of the inner channel, and the air flow below the inner channel guide plate 703 enters the outer channel 101; the inner culvert baffle 703 is connected to the inner culvert shell 205.
The outer duct guide plate 801 can divide the air flow from different directions, the air flow above the outer duct guide plate 801 enters the outer duct 101, and the air flow below the outer duct guide plate 801 flows away along with the external air flow; the outer bypass baffle 801 is connected to the outer bypass housing 102.
Optionally, in the dual-bypass vertical axis wind turbine provided in an embodiment of the present invention, the impeller compartment 404 further includes: an upper end impeller bearing 403 is installed at the center of the impeller support 401, and an impeller shaft 408 is sleeved in the upper end impeller bearing 403, so that the impeller 407 can rotate normally.
Optionally, in the dual-bypass vertical axis wind turbine provided by an embodiment of the present invention, the butterfly valve cabin 304 further includes: the butterfly valve 302, the opening and closing of the butterfly valve 302 can be communicated with and block the air flow in the impeller cabin 404 from entering the inner duct 206, so as to control the operation or stop of a double-duct vertical axis wind turbine according to an embodiment of the invention.
Optionally, in the dual-duct vertical axis wind turbine provided in an embodiment of the present invention, the outer duct 101 further includes: the outer duct sub-duct pressure sensor 109 is installed on the lower bottom surface 107 of the outer duct, and each outer duct sub-duct 105 is installed with one outer duct sub-duct pressure sensor 109 for detecting the air flow pressure at the bottom of each outer duct sub-duct 105 and transmitting the data to the PLC control system 611, and the PLC control system 611 determines whether each outer duct sub-duct 105 is on the windward side or the leeward side by comparing and analyzing the data of each outer duct sub-duct pressure sensor 109.
Optionally, in a dual-bypass vertical axis wind turbine according to an embodiment of the present invention, the inner bypass 206 further includes: the anemometer vane 209 is installed on the inner culvert partition plate 202 at the center of the bottom surface 203 on the inner culvert, and is used for detecting the current wind speed and wind direction, and transmitting data to the PLC control system 611, the PLC control system 611 determines whether each outer culvert 105 is on the windward side or the leeward side according to the obtained wind speed and wind direction data, and whether the dual culvert vertical axis wind turbine provided by an embodiment of the invention is started or stopped.
Optionally, in a dual-bypass vertical axis wind turbine according to an embodiment of the present invention, the inner bypass 206 further includes: the lightning rod 210, the lightning rod 210 is installed on the inner channel baffle 202 in the center of the bottom surface 203 on the inner channel, and when the lightning rod 210 encounters a lightning stroke, the lightning rod can introduce the lightning into the ground through the inner channel baffle 202, the inner channel shell 205, the outer channel baffle 106 and the generator cabin 608, so as to prevent the equipment from being damaged by the lightning stroke.
Optionally, in the dual-bypass vertical axis wind turbine provided in an embodiment of the present invention, the pressure cabin 505 further includes: the pressure cabin pressure sensor 506 is used to detect the air pressure in the pressure cabin 505 and send the pressure data to the PLC control system 611.
Optionally, in the dual-bypass vertical axis wind turbine provided in an embodiment of the present invention, the generator module 608 further includes: the generator 609 is arranged in the generator cabin 608, is connected with the impeller shaft 408 through the coupling 604 or is connected with the coupling 604 through the gear box 624, the coupling 604 is connected with the impeller shaft 408, the generator 609 can convert energy generated by the impeller 407 into electric energy, a temperature sensor is arranged in the generator 609, and the temperature data of the generator can be sent to the PLC control system 611; if the generator 609 is a direct drive generator, then the generator 609 is coupled to the impeller shaft 408 via the coupling 604 and the gearbox 624 is removable, if the generator 609 is a non-direct drive generator, then the generator 609 is coupled to the gearbox 624 and the gearbox 624 is coupled to the impeller shaft 408 via the coupling 604.
Optionally, in the dual-bypass vertical axis wind turbine provided in an embodiment of the present invention, the generator module 608 further includes: a gear box 624 is installed between the impeller shaft 408 and the generator 609 for increasing the rotation speed of the generator, the gear box 624 is installed or removed according to the type of the generator 609, the gear box 624 is removed when the generator 609 is a direct drive generator, and the gear box 624 is installed when the generator 609 is a non-direct drive generator.
Optionally, in the dual-bypass vertical axis wind turbine provided in an embodiment of the present invention, the generator module 608 further includes: an impeller rotation speed sensor 625 is installed on the culvert bottom platform 602, and is used for detecting the rotation speed of the impeller 407 and transmitting data to the PLC control system 611.
Optionally, in the dual-bypass vertical axis wind turbine provided in an embodiment of the present invention, the generator module 608 further includes: a coupling 604, mounted between the generator shaft 622 and the impeller shaft 408, or between the gearbox 624 and the impeller shaft 408, is used to transfer torque generated by the impeller 407 to the generator 609 or the gearbox 624.
Optionally, in the dual-bypass vertical axis wind turbine provided in an embodiment of the present invention, the generator module 608 further includes: the guide vane oil cylinder 612 is installed on the duct bottom platform 602, and the guide vane oil cylinder 612 is connected with the guide vane arm 620 to provide power for opening and closing the guide vane 503.
Optionally, in the dual-bypass vertical axis wind turbine provided in an embodiment of the present invention, the generator module 608 further includes: the guide vane arm 620, one end of the guide vane arm 620 is connected with the guide vane cylinder 612, and the other end is connected with the guide vane 503, so that the linear displacement generated by the guide vane cylinder 612 can be converted into torque to drive the guide vane 503 to rotate.
Optionally, in the dual-bypass vertical axis wind turbine provided in an embodiment of the present invention, the generator module 608 further includes: the PLC control system 611 is installed in the generator cabin 608, and can detect all sensor signals of the double-duct vertical axis wind turbine provided by an embodiment of the invention and control the normal operation of the double-duct vertical axis wind turbine provided by an embodiment of the invention.
Optionally, in the dual-bypass vertical axis wind turbine provided in an embodiment of the present invention, the generator module 608 further includes: the hydraulic station 607 is installed inside the generator cabin 608 and controlled by the PLC control system 611, and the hydraulic station 607 can provide pressure oil for the vane cylinder 612 and the butterfly valve 302.
Optionally, in the dual-bypass vertical axis wind turbine provided in an embodiment of the present invention, the generator module 608 further includes: the electric control cabinet 610 is arranged in the generator cabin 608, is controlled by the PLC control system 611, and is responsible for grid connection and excitation of the generator 609 and converts electric energy generated by the generator 609 into three sine alternating currents which can be connected in a grid.
Optionally, in the dual-bypass vertical axis wind turbine provided in an embodiment of the present invention, the generator module 608 further includes: a generator rotational speed sensor 605, mounted on the generator 609, detects the rotational speed of the generator 609 and sends rotational speed data of the generator 609 to the PLC control system 611.
Optionally, in the dual-bypass vertical axis wind turbine provided in an embodiment of the present invention, the generator module 608 further includes: the generator cabin radiator 621, generator cabin radiator 621 cold junction is installed inside generator cabin 608, and generator cabin radiator 621 hot junction is installed in the generator cabin 608 outside for cooling down all equipment in the generator cabin 608, guarantee the normal operating of all equipment in the generator cabin 608.
Optionally, in the dual-bypass vertical axis wind turbine provided in an embodiment of the present invention, the generator module 608 further includes: the lower end face impeller bearing 603 is arranged at the center of the culvert bottom platform 602 of the upper bottom face 601 of the generator cabin and is used for positioning and installing the impeller 407, so that the impeller 407 can stably rotate.
Optionally, in the dual-bypass vertical axis wind turbine provided in an embodiment of the present invention, the generator module 608 further includes: an impeller locking device 623 mounted on the impeller shaft 408 inside the generator compartment 608 can be used to lock the impeller 407 during service.
The working principle of the double-duct vertical axis wind turbine provided by the embodiment of the invention is as follows:
according to Bernoulli's theorem, the smaller the velocity of a fluid at a location, the greater the pressure at that location, and conversely the greater the flow rate, the less the pressure; when air enters from the outer duct airflow inlet 104, the smaller the outer duct cross-sectional area is, the smaller the airflow velocity is, the larger the airflow pressure is, and the airflow pressure of the outer duct airflow outlet 108 is larger than the external air pressure because the air passes to the outer duct lower bottom surface 107; when the external air flows through the inner duct upper bottom surface 203, the air inside the inner duct 206 is in a relatively static state, and because the air flow rate of the inner duct upper bottom surface 203 is greater than that of the inner duct 206, the air pressure above the inner duct upper bottom surface 203 is smaller than that inside the inner duct 206, so that the air inside the inner duct 206 can flow upwards, and flows away along with the external air, and a certain negative pressure is generated at the inner duct airflow inlet 207 of the inner duct lower bottom surface 204; at this time, a certain pressure difference is generated from the outer duct airflow outlet 108 to the inner duct airflow inlet 207, after the guide vane 503 in the pressure cabin 505 is opened, the airflow in the outer duct 101 accelerates to enter the inner duct 206, meanwhile, when the airflow passes through the impeller cabin 404, the impeller 407 is driven to rotate to generate mechanical energy, the opening or closing of the guide vane 503 in the pressure cabin 505 can be controlled to connect or block the airflow in the outer duct 101 to enter the inner duct 206, the rotation or stopping of the impeller 407 is controlled, the opening amplitude of the guide vane 503 in the pressure cabin 505 can be adjusted to control the airflow rate flowing from the outer duct 101 to the inner duct 206, so as to control the energy output rate of the impeller 407, and the opening or closing of the butterfly valve 302 in the butterfly valve cabin 304 can be controlled to connect or block the airflow in the outer duct 101 to enter the inner duct 206, so as to control the rotation or stopping of the impeller 407.
The embodiment of the invention provides a method for starting a double-bypass vertical axis wind turbine, which comprises the following steps: the PLC control system 611 determines whether each outer duct sub-duct 105 is on the windward side or the leeward side by collecting the data of the pressure of each outer duct sub-duct pressure sensor 109 and the anemometer vane 209, then determines the opening width of the guide vane 503 to be opened and the guide vane 503 to be opened, and in general, the pressure at the bottom of the windward side outer duct sub-duct 105 is greater than the pressure at the bottom of the leeward side outer duct sub-duct 105, when the impeller 407 reaches the grid-connected rotation speed, the electric control cabinet 610 is controlled by the PLC control system 611 to perform grid connection.
The embodiment of the invention provides operation of a double-bypass vertical axis wind turbine, which comprises the following steps: when the actual power of the generator 609 is greater than the rated power of the generator 609, the PLC control system 611 will open the leeward guide vane 503, reduce the airflow rate flowing through the pressure cabin 505 to reduce the output power of the impeller 407, if the power of the generator 609 cannot be reduced, the PLC control system 611 will reduce the opening amplitude of the windward guide vane 503, and reduce the airflow rate entering the pressure cabin 505 from the windward outer duct sub-duct 105.
The embodiment of the invention provides a stop of a double-bypass vertical axis wind turbine: the PLC control system 611 will close all vanes 503; the flow of air in the outer duct 101 cannot enter the pressure vessel 505, the impeller 407 and the generator 609 stop rotating, and the PLC control system 611 will close the butterfly valve 302 when serviced or shut down for a long period of time.
Claims (7)
1. A dual duct vertical axis wind turbine comprising:
the inner culvert (206) is nested in the outer culvert shell (102), the inner culvert shell (205) is connected with the outer culvert shell (102) through the outer culvert partition plate (106), and the outer culvert (101) and the inner culvert (206) simultaneously acquire wind energy; an energy conversion device impeller cabin (404) is arranged on the flow track of the air flow flowing out of the outer duct (101) and then entering the inner duct (206) to convert wind energy into mechanical energy; installing an airflow flow control device pressure cabin (505) on the flow track of the airflow flowing out of the outer duct (101) and then entering the inner duct (206) to control the airflow flow out of the outer duct (101) and then entering the inner duct (206); installing an air flow control device butterfly valve cabin (304) on the flow track of the air flow flowing out of the outer duct (101) and then entering the inner duct (206) so as to communicate or block the air flow flowing out of the outer duct (101) and then entering the inner duct (206); a generator compartment (608) is located below the outer duct (101) and the pressure compartment (505).
2. A dual-duct vertical axis wind turbine as described in claim 1 wherein:
the outer duct (101) is polygonal in appearance, the upper bottom surface and the lower bottom surface are similar to prismatic tables of combined lines of straight lines and curves, or the upper bottom surface and the lower bottom surface are circular, and the bus is similar to a circular table of combined lines of straight lines and curves; the outer duct shell (102), the inner duct shell (205), the butterfly valve cabin shell (306) and the impeller cabin shell (405) are connected together by the outer duct partition plates (106) to form a plurality of outer duct sub-ducts (105); the collection of outer duct sub-ducts (105) forms the outer duct (101), an outer duct upper bottom surface (103) and an outer duct lower bottom surface (107) are parallel to a ground plane (619), and the area of the outer duct lower bottom surface (107) is smaller than the area of the outer duct upper bottom surface (103); the outer duct (101) further comprises: the outer duct sub-duct pressure sensor (109), outer duct sub-duct pressure sensor (109) are installed bottom surface (107) under the outer duct, and every outer duct sub-duct (105) is installed one outer duct sub-duct pressure sensor (109) is used for detecting every outer duct sub-duct (105) bottom air current pressure to convey data to PLC control system (611), PLC control system (611) is through the comparison analysis every outer duct sub-duct pressure sensor (109) data, confirm that every outer duct sub-duct (105) is in the face of facing the wind or is in the lee face.
3. A dual-duct vertical axis wind turbine as described in claim 1 wherein:
the shape of the inner channel (206) is a similar prismatic table with polygonal upper bottom surface and polygonal lower bottom surface, the side edges are combined lines of straight lines and curves, or the upper bottom surface and the lower bottom surface are circular, and the bus is a similar truncated cone with combined lines of straight lines and curves; the inner culvert (206) is divided into a plurality of inner culvert sub-culverts (201) by the inner culvert partition plates (202) so as to improve the wind energy utilization rate, and the inner culvert sub-culverts (201) are assembled into the inner culvert (206); the inner culvert upper bottom surface (203) and the inner culvert lower bottom surface (204) are parallel to the ground plane (619), and the area of the inner culvert lower bottom surface (204) is smaller than the area of the inner culvert upper bottom surface (203); the inner duct (206) is nested inside the outer duct housing (102); the upper bottom surface (203) of the inner culvert is an inner culvert airflow outlet (208), and the lower bottom surface (204) of the inner culvert is an inner culvert airflow inlet (207); the internal channel (206) further comprises: the anemometer wind vane (209) is arranged on the inner culvert clapboard (202) at the center of the upper bottom surface (203) of the inner culvert and is used for detecting the current wind speed and the current wind direction and transmitting data to the PLC control system (611); the internal channel (206) further comprises: and the lightning rod (210) is arranged on the inner culvert partition plate (202) at the center of the upper bottom surface (203) of the inner culvert.
4. A dual-duct vertical axis wind turbine as described in claim 1 wherein:
the butterfly valve cabin (304) is of a hollow cylinder structure, the butterfly valve cabin (304) is arranged below the inner duct (206), and a butterfly valve cabin shell (306) is connected with the outer duct partition plate (106); the butterfly valve pod (304) further comprises: the butterfly valve (302), butterfly valve (302) is installed at butterfly valve cabin (304) middle part, butterfly valve (302) open and shut can communicate and block the air current in impeller cabin (404) and get into interior duct (206).
5. A dual-duct vertical axis wind turbine as described in claim 1 wherein:
the impeller cabin (404) is of a hollow cylinder structure, an impeller cabin shell (405) is connected with the outer duct partition plate (106), an impeller (407) is arranged in the center of the impeller cabin (404), and the impeller (407) consists of an impeller shaft (408) and a plurality of layers of blades (409); the impeller shaft (408) is of a hollow cylindrical structure and is perpendicular to the ground plane (619); an impeller bracket (401) is arranged on the upper bottom surface (402) of the impeller cabin and is used for installing and positioning the impeller (407); the impeller pod (404) further comprises: the upper end face impeller bearing (403) is arranged at the center of the impeller bracket (401), and the impeller shaft (408) is sleeved in the upper end face impeller bearing (403) so that the impeller (407) can normally rotate.
6. A dual-duct vertical axis wind turbine as described in claim 1 wherein:
the pressure cabin (505) is of a hollow cylinder structure, an upper bottom surface (501) of the pressure cabin is connected with a lower bottom surface (406) of the impeller cabin, a guide vane bracket (502) is arranged on the upper bottom surface (501) of the pressure cabin and used for positioning and installing guide vanes (503), the guide vanes (503) are arranged at outer duct airflow outlets (108) on the side surfaces of the pressure cabin (505), each outer duct sub-duct (105) corresponds to one guide vane (503) and is used for controlling the air flow entering the pressure cabin (505) from the outer duct (101), and the pressure cabin (505) is arranged below the impeller cabin (404); the pressure pod (505) further comprises: a pressure cabin pressure sensor (506) installed at the lower bottom surface (504) of the pressure cabin for detecting the air pressure inside the pressure cabin (505) and sending the pressure data to the PLC control system (611).
7. A dual-duct vertical axis wind turbine as described in claim 1 wherein:
the generator cabin (608) is positioned at the bottom of the double-duct vertical axis wind turbine; the lower bottom surface (618) of the generator cabin is connected with a ground plane (619), the upper bottom surface (601) of the generator cabin is a culvert bottom platform (602), and the upper bottom surface (601) of the generator cabin is connected with the outer culvert (101) and the pressure cabin (505); a manhole (617) is formed in the culvert bottom platform (602), the manhole (617) can be opened only in the overhauling process, and the generator cabin (608) is not communicated with the outer culvert (101) and the pressure cabin (505) at other times, and air flow cannot pass through the generator cabin; the generator compartment (608) is provided with a generator compartment door (606); the upper bottom surface (601) of the generator cabin and the lower bottom surface (618) of the generator cabin are polygonal or circular; the generator module (608) further includes: a generator (609), wherein the generator (609) is arranged inside the generator cabin (608) and is connected with the impeller shaft (408) through a coupler (604) or is connected with the coupler (604) through a gear box (624), and the coupler (604) is connected with the impeller shaft (408); the generator module (608) further includes: the coupling (604) is mounted between a generator shaft (622) and the impeller shaft (408) or between a gearbox (624) and the impeller shaft (408); the generator module (608) further includes: the gearbox (624), when the generator (609) is a direct drive generator, the gearbox (624) is removable, and when the generator (609) is a non-direct drive generator, the gearbox (624) needs to be installed between the coupling (604) and the generator (609), and the coupling (604) is connected with the impeller shaft (408); the generator module (608) further includes: an impeller rotation speed sensor (625) mounted on the culvert bottom platform (602); the generator module (608) further includes: the guide vane oil cylinder (612) is arranged on the culvert bottom platform (602), and the guide vane oil cylinder (612) is connected with a guide vane arm (620); the generator module (608) further includes: the guide vane force arm (620), wherein one end of the guide vane force arm (620) is connected with the guide vane oil cylinder (612), and the other end is connected with the guide vane (503); the generator module (608) further includes: the PLC control system (611) is arranged in the generator cabin (608) and can detect all sensor signals of the double-duct vertical axis wind turbine and control the normal operation of the double-duct vertical axis wind turbine; the generator module (608) further includes: a hydraulic station (607) which is arranged inside the generator cabin (608) and is controlled by a PLC control system (611); the generator module (608) further includes: the electric control cabinet (610) is arranged inside the generator cabin (608) and is controlled by the PLC control system (611); the generator module (608) further includes: a generator rotation speed sensor (605) mounted on the generator (609); the generator module (608) further includes: a generator cabin radiator (621), wherein the cold end of the generator cabin radiator (621) is arranged in the generator cabin (608), and the hot end of the generator cabin radiator (621) is arranged outside the generator cabin (608); the generator module (608) further includes: the lower end face impeller bearing (603) is arranged at the center of the culvert bottom platform (602) on the upper bottom surface (601) of the generator cabin; the generator module (608) further includes: an impeller locking device (623) mounted on an impeller shaft (408) within the generator compartment (608).
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| CN110131104B (en) * | 2018-02-02 | 2024-05-03 | 南京慧风新能源技术有限公司 | Wind energy conversion device of wind driven generator and wind driven generator set |
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