CN112228171A - Supercritical carbon dioxide turbine-starting motor-compressor unit - Google Patents
Supercritical carbon dioxide turbine-starting motor-compressor unit Download PDFInfo
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- CN112228171A CN112228171A CN202011209562.9A CN202011209562A CN112228171A CN 112228171 A CN112228171 A CN 112228171A CN 202011209562 A CN202011209562 A CN 202011209562A CN 112228171 A CN112228171 A CN 112228171A
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 62
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 31
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 31
- 239000007858 starting material Substances 0.000 claims abstract description 31
- 230000001360 synchronised effect Effects 0.000 claims abstract description 8
- 238000001816 cooling Methods 0.000 claims description 9
- 230000005611 electricity Effects 0.000 claims description 3
- 238000010248 power generation Methods 0.000 description 8
- 230000008901 benefit Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000005034 decoration Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K7/00—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
- F01K7/32—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines using steam of critical or overcritical pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/08—Adaptations for driving, or combinations with, pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D19/00—Starting of machines or engines; Regulating, controlling, or safety means in connection therewith
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K25/00—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for
- F01K25/08—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours
- F01K25/10—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours the vapours being cold, e.g. ammonia, carbon dioxide, ether
- F01K25/103—Carbon dioxide
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/04—Units comprising pumps and their driving means the pump being fluid-driven
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
- H02K7/116—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/18—Structural association of electric generators with mechanical driving motors, e.g. with turbines
- H02K7/1807—Rotary generators
- H02K7/1823—Rotary generators structurally associated with turbines or similar engines
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Power Engineering (AREA)
- Combustion & Propulsion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
The invention discloses a supercritical carbon dioxide turbine-starter motor-compressor unit, wherein the starter motor is provided with an annular motor stator and a motor rotor, and the motor rotor is relatively rotatably arranged in an inner cavity of the motor stator; this unit includes: the high-speed shaft, turbine impeller and compressor impeller are installed on both ends of the high-speed shaft extending axially separately, the motor stator and motor rotor are set up coaxially along the high-speed shaft; a plurality of groups of gears are fixedly arranged in the radial direction of the high-speed shaft; the planetary gear is arranged in the inner cavity of the motor rotor and is provided with an inner gear ring and an outer gear ring, the inner gear ring is meshed with the gear on the high-speed shaft, and the outer gear ring of the planetary gear is connected with the motor rotor into a whole; the synchronous rotation of the motor rotor and the high-speed shaft is realized through the synchronous rotation of the inner gear ring and the outer gear ring. The TAC unit has small volume and compact structure, ensures the running speed of the turbine-compressor impeller, and simultaneously realizes the application of a low-speed high-power motor in the TAC unit.
Description
Technical Field
The invention belongs to the technical field of power, and relates to a supercritical carbon dioxide turbine-starter motor-compressor unit.
Background
The supercritical carbon dioxide Brayton cycle power generation technology is a closed cycle turbine power generation technology adopting supercritical carbon dioxide as a working medium, is a leading-edge technology which is rapidly developed in recent years, and has the advantages of high cycle efficiency, wide power coverage range (hundreds of kilowatts to hundreds of megawatts), high power density, low vibration noise and the like. The TAC (Turbine-Alternator-Compressor, also called Turbine-starter motor-Compressor) unit is a power generation core device in the supercritical carbon dioxide Brayton power generation system, and the sizes of the Compressor and the Turbine in the TAC unit can be greatly reduced due to the high density characteristic of the supercritical carbon dioxide, so that the impeller mechanical part structure is compact, and the improvement of the energy density of a power device is facilitated.
In the supercritical carbon dioxide Brayton cycle power generation system, a generator works in a mode of being directly driven by a turbine, and the rotating speed of the generator can reach more than 40 krpm. However, the power of the high-speed permanent magnet motor researched and developed by domestic professional motor manufacturers is relatively low, and the high-speed motor with the 300kW grade of 40000rpm is not a mature product at home and abroad. The low-speed motor is adopted to drive the speed-up gearbox, so that the efficiency of the domestic high-speed gearbox is limited to be lower (less than or equal to 90%); meanwhile, the gear box is large in size and far exceeds the size of an impeller, and the advantage of compact structure of the TAC unit cannot be fully exerted. Therefore, it is necessary to design a supercritical carbon dioxide TAC unit which is based on a mature motor technology, efficient, compact and capable of meeting the requirement of high-speed operation of a rotor.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a supercritical carbon dioxide turbine-starting motor-compressor unit, which has the advantages of small volume and compact structure, ensures the running speed of a turbine-compressor impeller, and simultaneously realizes the application of a low-speed high-power motor in the TAC unit.
The invention provides a supercritical carbon dioxide turbine-starting motor-compressor unit, which adopts the following technical scheme:
a supercritical carbon dioxide turbine-starter motor-compressor unit comprises a turbine, a starter motor and a compressor, wherein the turbine is provided with a turbine impeller, the compressor is provided with a compressor impeller, the starter motor is provided with an annular motor stator and a motor rotor, and the motor rotor is relatively rotatably arranged in an inner cavity of the motor stator; further comprising:
the turbine impeller and the compressor impeller are respectively arranged at two ends of the high-speed shaft extending along the axial direction, and the motor stator and the motor rotor are coaxially arranged along the high-speed shaft; a plurality of groups of gears are fixedly arranged in the radial direction of the high-speed shaft;
the planetary gear is arranged in an inner cavity of the motor rotor and is provided with an inner gear ring and an outer gear ring, the inner gear ring is meshed with a gear on the high-speed shaft, and the outer gear ring of the planetary gear is connected with the motor rotor into a whole; and the synchronous rotation of the motor rotor and the high-speed shaft is realized through the synchronous rotation of the inner gear ring and the outer gear ring.
Preferably, the high-speed shaft is positioned on two sides of the planetary gear and respectively sleeved with a unit end cover for limiting the axial movement of the planetary gear.
Furthermore, the unit end cover is connected with the high-speed shaft through a bearing.
Furthermore, the planetary gears are arranged on the high-speed shaft at intervals in multiple groups, the inner gear rings of any one group of planetary gears are correspondingly meshed with the gears of the high-speed shaft one by one, and the outer gear rings of the multiple groups of planetary gears are integrally connected.
Furthermore, each group of planetary gears comprises a plurality of planetary gears which are uniformly distributed along the circumferential direction, and a plurality of planetary gear shafts which are correspondingly arranged at the centers of the plurality of planetary gears, and the planetary gear shafts of two adjacent groups of planetary gears are coaxially arranged in a one-to-one correspondence manner;
the plurality of planet wheels face the inner side of the high-speed shaft and serve as inner gear rings of the planet gears.
Furthermore, both ends of the planet wheel shaft are fixed on the unit end cover through a planet fixing disc;
and an outer gear ring of the planetary gear is rotatably arranged on the unit end cover relative to the high-speed shaft.
Furthermore, an outer gear ring of the planetary gear is embedded on the motor rotor.
Furthermore, a cooling assembly is further arranged around the outer side of the motor stator, which is far away from the high-speed shaft.
Furthermore, the end part, far away from the high-speed shaft, of the unit end cover is fixed on the cooling assembly.
Preferably, when the power supply of the unit is turned on, a motor rotor of the starting motor rotates compared with a motor stator to synchronously drive the planetary gear to rotate, and an inner gear ring of the planetary gear drives the high-speed shaft to drive the turbine blades and the compressor blades to rotate;
when the turbine of the unit can independently drive the compression impeller and the rotating speed of the high-speed shaft rises to the designed rotating speed, the high-speed shaft is used as a driving shaft, and the planetary gear is driven to drive the motor rotor to rotate compared with the motor stator, so that the starting motor generates electricity.
The invention can bring the following beneficial effects:
1) the invention adopts the structural design of a supercritical carbon dioxide turbine with a planetary gear, a starting motor and a compressor coaxial integrated unit, wherein the inside of a motor rotor in the starting motor is connected with a turbine impeller and a compressor impeller through a planetary gear structure; when the starting motor is in an engine state, the planetary gear plays a role in increasing speed to drag the compressor-turbine impeller to run at a high speed relative to the high-speed shaft; in the power generation state of the starting motor, the planetary gear plays a role in speed reduction, and the compressor-turbine impeller drives the starting motor to generate power through the rotation of the high-speed shaft. Therefore, compared with the traditional gear box, the planetary gear type generator set greatly reduces the volume of the generator set and has a compact structure.
2) According to the invention, by adopting the planetary gear, when the starting motor is in a generator state, the high-speed shaft gear with smaller radius is transmitted to the planetary gear outer gear ring with larger radius, so that the running rotating speed of the starting motor is greatly reduced, and the application of the low-speed high-power motor on the TAC unit can be realized.
3) According to the invention, by adopting the planetary gear, when the starting motor is in an engine state, the rotating speed of the turbine-compressor impeller can be kept or even increased by transmitting the rotating speed to the high-speed shaft gear with a smaller radius through the planetary gear outer gear ring with a larger radius, and the operating efficiency of the supercritical carbon dioxide system is ensured.
In conclusion, the invention adopts the structural design of the supercritical carbon dioxide turbine with the planet gear, the starting motor and the compressor coaxial integrated unit, thereby not only overcoming the limitation that the high-power motor has low rotating speed and can not directly drive the high-speed impeller machine, but also avoiding the defects of low efficiency and large volume of the high-speed gear box, and fully playing the advantages of high volumetric energy density and compact structure of the supercritical carbon dioxide power generation. In addition, the design provided by the invention can be applied to other types of rotating machinery, and the applicability is wide.
Drawings
Fig. 1 is a schematic structural diagram of a supercritical carbon dioxide turbine-starter motor-compressor unit according to the present invention.
The notations in the figures have the following meanings:
1-a turbine wheel; 2-a compressor wheel; 3-starting motor, 30-motor stator, 31-motor rotor; 4-high speed shaft, 40-gear; 5-planetary gear, 50-inner gear ring, 51-outer gear ring, 52-planetary gear, 53-planetary gear shaft and 54-planetary fixed disc; 6-unit end cover; 7-a bearing; 8-cooling the assembly.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth to provide a thorough understanding of the present application, and in the accompanying drawings, preferred embodiments of the present application are set forth. This application may, however, be embodied in many different 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. This application is capable of embodiments in many different forms than those described herein and those skilled in the art will be able to make similar modifications without departing from the spirit of the application and it is therefore not intended to be limited to the specific embodiments disclosed below.
For the sake of simplicity, the drawings only schematically show the parts relevant to the present invention, and they do not represent the actual structure as a product.
Further, in the description of the present application, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise. In the description of the present application, "a number" means at least one, such as one, two, etc., unless specifically limited otherwise.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
According to an embodiment provided by the invention, the supercritical carbon dioxide turbine-starter motor-compressor unit (namely a TAC unit) comprises a turbine, a starter motor and a compressor, wherein the turbine is provided with a turbine wheel 1, the compressor is provided with a compressor wheel 2, the starter motor 3 is provided with an annular motor stator 30 and a motor rotor 31, and the motor rotor 31 is relatively rotatably arranged in an inner cavity of the motor stator 30; further comprising:
the high-speed shaft 4, the said turbine impeller 1 and compressor impeller 2 are fixedly mounted on both ends of the high-speed shaft 4 extending axially separately, the said motor stator 30 and motor rotor 31 are set up coaxially along the high-speed shaft 4; a plurality of groups of gears 40 are fixedly arranged in the vertical direction of the high-speed shaft 4, so that the gears 40 and the high-speed shaft can synchronously rotate;
the planetary gear 5 is arranged in an inner cavity of the motor rotor 31, the planetary gear 5 is provided with an inner gear ring 50 and an outer gear ring 51, the inner gear ring 50 is meshed with the gear 40 on the high-speed shaft 4, so that the inner gear ring 50 and the gear 40 on the high-speed shaft 4 can synchronously rotate due to meshing, the outer gear ring 51 of the planetary gear is connected with the motor rotor 31 into a whole, so that the outer gear ring 51 and the motor rotor 31 can synchronously rotate, and the synchronous rotation of the motor rotor 31 and the high-speed shaft 4 is realized through the synchronous rotation of the inner gear ring 50 and the outer gear ring 51.
According to the structural design of the supercritical carbon dioxide turbine-starter motor-compressor coaxial integrated unit with the planetary gear adopted by the embodiment, the motor rotor 31 in the starter motor 3 is internally connected with the turbine wheel and the compressor wheel 2 through the planetary gear 5 structure. When the motor 3 is started to be in an engine state, the motor rotor 31 rotates compared with the motor stator 30 to drive the outer gear ring 51 of the planetary gear 5 to rotate, the outer gear ring 51 drives the planetary gear 52 (which is a common prior art and is mentioned later) to rotate, the planetary gear 52 drives the high-speed shaft 4 to rotate at the position of the inner gear ring 51 through gear meshing, and the planetary gear 5 plays a role in increasing speed at the moment because the radius of the outer gear ring 51 is larger than that of the gear 40 on the high-speed shaft 4 to drag the compressor-turbine impeller to rotate along with the high-speed shaft 4, so that the running efficiency of the supercritical carbon dioxide system is ensured; when the TAC unit supports and the running speed of the high-speed shaft 4 reaches the designed rotating speed, the starting motor 3 is in a power generation state, the high-speed shaft 4 in turn drives the inner gear ring 50 of the planet gear 52 to rotate through the gear 40, the outer gear ring 51 drives the motor rotor 31 to synchronously rotate, at the moment, the planet gear 5 plays a role of speed reduction, the compressor-turbine impeller drives the starting motor 3 to generate power through the rotation of the high-speed shaft 4, and the application of the low-speed high-power motor on the TAC unit is realized. The outer ring gear 51 of the planetary gear 5 may be embedded in the motor rotor 31.
In a preferred embodiment, unit end covers 6 are respectively arranged on the high-speed shaft 4 and positioned on two sides of the planetary gear 5, and are used for limiting the axial movement of the planetary gear. Specifically, the planetary gear 5 is fixed on the unit end cover 6 through a planetary fixing disc 54. The unit end cover 6 is connected with the high-speed shaft 4 through a bearing 7, and specifically, a sliding bearing, a rolling bearing, a magnetic bearing and the like can be adopted.
As another preferred embodiment, in order to match the wider axial dimension of the motor rotor 31 along the high-speed shaft 4, the gears on the high-speed shaft 4 are provided as multiple groups at intervals, and correspondingly, the planetary gears 5 may also be arranged on the high-speed shaft 4 at intervals, inner gear rings of any one group of planetary gears are meshed with the gears of the high-speed shaft in a one-to-one correspondence manner, and outer gear rings of multiple groups of planetary gears 5 are integrally connected, so that not only is the structure compact and convenient to arrange, but also the rotation process of the motor rotor 31 driven by the planetary gears 5 in the inner cavity of the motor rotor 30 is more uniform and stable. In practice, the gears on the high speed shaft 4 and the planetary gears 5 are generally set to 2 sets. Wherein, any group of planetary gears 5 comprises a plurality of planetary gears 52 uniformly distributed along the circumferential direction and a plurality of planetary gear shafts 53 correspondingly arranged at the centers of the plurality of planetary gears 52, and the planetary gear shafts 53 of two adjacent groups of planetary gears 5 are coaxially arranged in a one-to-one correspondence manner; a plurality of planet gears 52 are directed towards the inside of the high speed shaft as the inner annulus gear 50 of the planet gears. As shown in fig. 1, the planetary gears 5 are arranged into 2 groups, 3 planetary gears are arranged in the outer gear ring of each group of planetary gears 5, correspondingly, 2 groups of planetary gears 5 are correspondingly arranged in 2 planetary gears of each group through 3 coaxial planetary gear shafts 53, and the 3 coaxial planetary gear shafts 53 are arranged side by side along the direction parallel to the high speed shaft.
Preferably, for any planetary gear shaft, two ends of the planetary gear shaft 53 are fixed on the unit end cover 6 through the planetary fixed plate 54, specifically, two ends of the planetary gear shaft 53 are nested in the planetary fixed plate 54 through bearings, and the planetary fixed plate 54 is nested in the unit end cover, so that the planetary gear shaft 53 is fixed by limiting the rotation of the planetary fixed plate 54, the outer ring gear 51 of the planetary gear can effectively drive the planetary gear 52, and further the inner ring gear 50 of the planetary gear 52 drives the high-speed shaft gear 40 to synchronously rotate. The outer gear ring 51 of the planetary gear 5 is rotatably mounted on the unit end cover 6 relative to the high-speed shaft 4, and specifically, both ends of the outer gear ring 52 in the direction of the high-speed shaft are rotatably nested in the unit end cover through bearings, so that the axial movement of the planetary gear 5 is further limited.
Furthermore, a cooling assembly 8 is enclosed on the outer side of the motor stator 30 remote from the high-speed shaft 4. The end part, far away from the high-speed shaft 4, of the unit end cover 6 is fixed on the cooling assembly 8, specifically, the unit end cover 6, the cooling assembly 8 and the high-speed shaft 4 are fixed through bolts to form an annular inner cavity, the starting motor 3 and the planetary gear 5 are arranged in the annular inner cavity in an enclosing mode, and the whole compactness of the unit is improved.
According to the TAC unit provided by the above embodiment of the present invention, when the power supply of the unit is turned on, the motor rotor 31 of the starter motor rotates in comparison with the motor stator 30 to synchronously drive the planetary gear 5 to rotate, and at this time, the starter motor serves as an engine to drive the high-speed shaft 4 to drive the turbine blade 1 and the compressor blade 2 to rotate; when the turbine wheel of the unit autonomously drives the compressor wheel and the rotating speed of the high-speed shaft rises to the designed rotating speed, the high-speed shaft 4 is used as a driving shaft, and in turn, the motor rotor 31 is driven to rotate through the planetary gear 5 and is compared with the motor stator 30, so that the magnetic induction lines are cut to generate current, the starter motor 3 generates electricity, and at the moment, the starter motor 3 is used as a generator. Finally, the current is output through a current conversion device connected with the motor stator 30, and meanwhile, in order to avoid overheating of the starter motor 3, the starter motor 3 is cooled by the cooling assembly 8.
It should be noted that the above embodiments can be freely combined as necessary. The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A supercritical carbon dioxide turbine-starter motor-compressor unit comprises a turbine, a starter motor and a compressor, wherein the turbine is provided with a turbine impeller, the compressor is provided with a compressor impeller, the starter motor is provided with an annular motor stator and a motor rotor, and the motor rotor is relatively rotatably arranged in an inner cavity of the motor stator; it is characterized by also comprising:
the turbine impeller and the compressor impeller are respectively arranged at two ends of the high-speed shaft extending along the axial direction, and the motor stator and the motor rotor are coaxially arranged along the high-speed shaft; a plurality of groups of gears are fixedly arranged in the radial direction of the high-speed shaft;
the planetary gear is arranged in an inner cavity of the motor rotor and is provided with an inner gear ring and an outer gear ring, the inner gear ring is meshed with a gear on the high-speed shaft, and the outer gear ring of the planetary gear is connected with the motor rotor into a whole; and the synchronous rotation of the motor rotor and the high-speed shaft is realized through the synchronous rotation of the inner gear ring and the outer gear ring.
2. The supercritical carbon dioxide turbine-starter motor-compressor train of claim 1, wherein:
and the high-speed shaft is positioned on two sides of the planetary gear and is respectively sleeved with a unit end cover for limiting the axial movement of the planetary gear.
3. The supercritical carbon dioxide turbine-starter motor-compressor train of claim 2, wherein:
and the unit end cover is connected with the high-speed shaft through a bearing.
4. The supercritical carbon dioxide turbine-starter motor-compressor train of claim 2, wherein:
the planetary gears are arranged on the high-speed shaft at intervals in multiple groups, the inner gear rings of any one group of planetary gears are correspondingly meshed with the gears of the high-speed shaft one by one, and the outer gear rings of the multiple groups of planetary gears are integrally connected.
5. The supercritical carbon dioxide turbine-starter motor-compressor train of claim 4, wherein:
any group of planetary gears comprises a plurality of planetary gears which are uniformly distributed along the circumferential direction, and a plurality of planetary gear shafts which are correspondingly arranged at the centers of the plurality of planetary gears, and the planetary gear shafts of two adjacent groups of planetary gears are coaxially arranged in a one-to-one correspondence manner;
the plurality of planet wheels face the inner side of the high-speed shaft and serve as inner gear rings of the planet gears.
6. The supercritical carbon dioxide turbine-starter motor-compressor train of claim 5, wherein:
both ends of the planetary wheel shaft are fixed on the unit end cover through a planetary fixing disc;
and an outer gear ring of the planetary gear is rotatably arranged on the unit end cover relative to the high-speed shaft.
7. The supercritical carbon dioxide turbine-starter motor-compressor train of claim 6, wherein:
and an outer gear ring of the planetary gear is embedded on the motor rotor.
8. The supercritical carbon dioxide turbine-starter motor-compressor train of claim 2, wherein:
and a cooling assembly is further arranged around the outer side of the motor stator far away from the high-speed shaft.
9. The supercritical carbon dioxide turbine-starter motor-compressor train of claim 8, wherein:
and the end part of the unit end cover, which is far away from the high-speed shaft, is fixed on the cooling assembly.
10. The supercritical carbon dioxide turbine-starter motor-compressor train of claim 1, wherein:
when a unit power supply is started, a motor rotor of the starting motor rotates compared with a motor stator to synchronously drive the planetary gear to rotate, and an inner gear ring of the planetary gear drives the high-speed shaft to drive the turbine blades and the compressor blades to rotate;
when the turbine of the unit can independently drive the compressor and the rotating speed of the high-speed shaft rises to the designed rotating speed, the high-speed shaft is used as a driving shaft, and the planetary gear is driven to drive the motor rotor to rotate compared with the motor stator, so that the starting motor generates electricity.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011209562.9A CN112228171A (en) | 2020-11-03 | 2020-11-03 | Supercritical carbon dioxide turbine-starting motor-compressor unit |
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| CN202011209562.9A CN112228171A (en) | 2020-11-03 | 2020-11-03 | Supercritical carbon dioxide turbine-starting motor-compressor unit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI781860B (en) * | 2021-12-28 | 2022-10-21 | 財團法人工業技術研究院 | Turbo device and circulatory system |
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| CN108699965A (en) * | 2016-02-22 | 2018-10-23 | 株式会社丰田自动织机 | Supercharging device |
| CN110273758A (en) * | 2019-06-04 | 2019-09-24 | 湖南航翔燃气轮机有限公司 | Miniature gas turbine generating set |
| US20200102885A1 (en) * | 2018-09-28 | 2020-04-02 | United Technologies Corporation | Differential geared amplification of auxiliary power unit |
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| CN105276145A (en) * | 2015-10-29 | 2016-01-27 | 重庆永进重型机械成套设备有限责任公司 | Gas generator gear box |
| CN108699965A (en) * | 2016-02-22 | 2018-10-23 | 株式会社丰田自动织机 | Supercharging device |
| CN108071519A (en) * | 2016-11-17 | 2018-05-25 | 上海齐耀动力技术有限公司 | A kind of solar energy Stirling gen-set control system and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| TWI781860B (en) * | 2021-12-28 | 2022-10-21 | 財團法人工業技術研究院 | Turbo device and circulatory system |
| US11578615B1 (en) | 2021-12-28 | 2023-02-14 | Industrial Technology Research Institute | Turbo device and circulatory system |
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Application publication date: 20210115 |