CN204253266U - The integrated half directly driving type tidal generating set of a kind of pile foundation vertical shaft - Google Patents

Abstract

The purpose of this utility model is to provide a pile foundation vertical shaft integrated semi-direct drive tidal current power generation device, the inner cylinder shaft is sleeved outside the pile foundation, the outer cylinder shaft is sleeved outside the inner cylinder shaft and cooperates with the inner cylinder shaft through bearings , the outer cylinder shaft is fixed with a hub, the blades are connected to the hub, the upper end of the outer cylinder shaft is connected to the planetary carrier, and the planetary gear is installed on the planetary carrier, the center wheel is located in the middle of all the planetary wheels and meshes with all the planetary wheels, and the center wheel is sleeved on the rotor shaft The outside is fixed with the rotor shaft, the outer stator and the inner ring gear are fixed on the inner wall of the box, and the inner rotor matched with the outer stator is set on the outside of the rotor shaft, all the planetary gears are meshed with the inner ring gear, the box body and the inner ring The cylinder phase is fixed. The utility model integrates the speed-increasing mechanism and the permanent magnet direct-drive generator to form an integrated semi-direct-drive generator box, which reduces the volume of the unit on the basis of meeting the basic speed regulation requirements of the unit and makes the unit compact in structure.

Description

A pile foundation vertical shaft integrated semi-direct drive tidal current power generation device

technical field

The utility model relates to a power generation device, specifically a tidal current power generation device.

Background technique

As a clean and renewable energy source, ocean energy will not produce waste water, waste gas, occupy large tracts of fertile land, and have no radiation pollution. Countries all over the world have accelerated the research on the development and utilization of ocean energy. As a kind of ocean energy, tidal current energy has developed rapidly in recent years on its development and utilization. The research experience on tidal current energy generation devices mainly comes from wind power generation devices. However, since the average density of seawater is about 800 times that of air, the overall size of the tidal current energy generation hydro turbine set is smaller than that of the two types of units at the same power level. The overall size of wind turbines is much smaller, which is also an important reason for increasing research on tidal current energy generation devices.

Tidal current energy generating devices can be basically divided into horizontal axis type and vertical axis type according to the positional relationship between the rotation axis of the turbine, the incoming flow direction and the sea level. Compared with the horizontal axis hydraulic turbine tidal current energy generation device, the vertical axis hydraulic turbine tidal current energy generation device has the characteristics of strong adaptability to flow direction, suitable for large-scale array arrangement, etc., and has obvious application advantages. The carrier forms of the vertical shaft hydraulic turbine type tidal current energy generation device are various. The patent document with the publication number CN101705904A discloses a high-power vertical (vertical) axis tidal current power generation device. It designs a carrier form that connects the gravity column base and the tower column through a universal ball joint, and its engine room is installed on the tower column. At the top, there are anchor chain plate eyes distributed on the outer edge of the engine room to link the buoy and the anchor to the anchor with cables. This form of carrier allows the unit to swing with the sea current (the whole carrier is in a semi-active state by using universal ball joint connection and anchor chain additional fixation, allowing the main shaft to swing with the current to a certain extent), which causes the unit to be in a swinging state for a long time when it is working. It will cause some damage to the assembly between the internal structures of the unit, and it is not conducive to the sealing of the unit, and the installation process is complicated, so it is not suitable for offshore operations.

The general composition of a water turbine is a carrier, an impeller, a speed-increasing device, and a generator set. The design of the speed-increasing device is often too complicated, resulting in a large axial dimension of the water turbine, which makes the volume and weight of the entire water turbine too large, causing a lot of inconvenience to installation and maintenance. Therefore, how to reduce the axial dimension of the tidal current energy generating device, reduce the weight, and reduce the difficulty of underwater sealing has become a technical problem to be solved urgently by those skilled in the art. The patent with the publication number CN102889162A proposes a permanent magnet semi-direct drive tidal current power generation device, which adopts a semi-direct drive combination of a simple transmission device and a permanent magnet direct generator to adapt to low water speed and low speed, thus simplifying the speed increasing device and combining the direct drive The design of the drive motor reduces the axial size of the turbine to a certain extent, but the subdivision assembly and design between the speed increasing device and the generator box are as complicated as the traditional method, which does not fundamentally solve the technical problem of reducing the axial volume of the unit .

Contents of the invention

The purpose of the utility model is to provide a pile foundation vertical shaft integrated semi-direct-drive tidal current power generation device which integrates a speed-increasing mechanism and a permanent-magnet direct-drive generator.

The purpose of this utility model is achieved in that:

The utility model is a pile foundation vertical shaft integrated semi-direct-drive tidal current power generation device, which is characterized in that it includes a pile foundation, an outer shaft cylinder, an inner shaft cylinder, a box body, a planetary frame, a center wheel, a rotor shaft, blades, and an inner cylinder shaft The outer cylinder shaft is sleeved outside the inner cylinder shaft and matched with the inner cylinder shaft through bearings. The outer cylinder shaft is fixed with a hub, and the blades are connected to the hub through spokes. The upper end of the cylinder shaft is connected to the planetary carrier, and the planetary gear is evenly installed on the planetary carrier along its circumferential direction. The center wheel is located in the middle of all the planetary wheels and meshes with all the planetary wheels. The outer stator and the inner ring gear are fixed on the inner wall, and the inner rotor matched with the outer stator is set outside the rotor shaft. The inner rotor is located inside the outer stator, and all the planetary gears are meshed with the inner ring gear. Fixed, the pile foundation includes an upper section, a middle section, and a lower section connected in sequence, the upper section of the pile foundation and the box are located above the sea level, and the middle section of the pile foundation, the blades, and the hub are located below the sea level.

The utility model can also include:

1. The pile foundation is set as a hollow structure for maintenance and storage of control equipment.

The utility model has the advantages that: for the technical defects of the existing tidal current power generation device, the utility model designs the carrier of the tidal current power generation device as a pile foundation type, which is fixed and driven into the seabed, and the generator set is installed on the top of the pile foundation and exposed to the water surface; secondly, through The design of simplifying the speed increasing device and integrating it with the direct drive generator simplifies the structure of the cabin in the tidal current energy generating device, fundamentally reduces the overall volume and size of the turbine, and improves the stability of the entire unit. reliability and service life. This type of tidal current energy generation device is easy to install and debug, reduces unit manufacturing and construction costs, and can work in low-speed sea areas with tidal currents, which is the main development trend of tidal current energy generation devices in the future.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is A-A view of the utility model.

Detailed ways

The utility model is described in more detail below in conjunction with accompanying drawing example:

Combined with Figures 1 and 2, the integrated semi-direct drive tidal current power generation device of the utility model is mainly composed of pile foundation 1, impeller structure and integrated semi direct drive generator, etc. device.

As shown in FIG. 1 , the pile foundation 1 is the carrier of the entire tidal current power generation device, and the position of the entire power generation device is fixed by driving the lower end of the pile foundation 1 into the seabed. Combining Figures 1 and 2, the impeller structure is installed in the middle of the pile foundation and placed below the horizontal plane. Wherein the outer shaft tube 2, the hub 3, the blades 4 and the spokes 6 are all fixedly connected, the inner shaft tube 14 is fixedly connected with the pile foundation 1, and the inner shaft tube 14 and the outer shaft tube 2 realize relative rotation through the bearing 5. The blades 4 are washed by the water flow, and the water flow energy is converted into the rotation of the impeller structure. Generally, the number of blades 4 is 3 or 4. The integrated semi-direct drive generator is composed of two parts: a planetary gear mechanism and a direct drive generator. The planetary gear mechanism includes an inner ring gear 10, a planetary gear 11, a sun gear 12 and a planet carrier 15; the direct drive generator mainly includes an outer stator 7 , inner rotor 8 and casing 9 and other components. The rotation of the impeller structure is transmitted to the semi-direct drive generator part through the fixed connection between the outer shaft cylinder 2 and the planetary carrier 15, and the rotation of the planetary carrier 15 drives the rotation of the planetary wheel 11 and the center wheel 12, realizing the speed-up transmission of the impeller rotation. The inner rotor 8 of the generator is fixedly connected with the rotating shaft of the center wheel 12 to realize the conversion of kinetic energy to electric energy, and the outer stator 7 and the inner ring gear are fixed on the generator casing 9 . The shaft of the pile foundation 1 passes through the impeller structure and the semi-direct drive generator, and the top end is fixedly connected to the end cover housing 13 .

As shown in Figures 1 and 2, in addition to the above, some necessary control equipment can be installed inside the pile foundation 1. When maintaining the tidal current energy generation device, the maintenance personnel can open the end cover cover 13 on the top of the pile foundation 1, Then enter the interior of the pile foundation 1 for maintenance and maintenance of the control equipment. The outer stator 7 and the inner rotor 8 of the pile foundation vertical shaft direct drive tidal current energy generation device are far away from the sea level, and the requirements for mechanical dynamic seals are relatively low, so there is no need to worry about seawater entering the generator box 9 and affecting the tidal current energy generation device. normal work.

Select a sea area flow channel with a relatively low flow rate, and install the pile foundation vertical shaft semi-direct drive tidal current energy generation device in the water channel. When the tidal current speed reaches the start-up speed, the impeller rotates under the impact of the tidal current, driven The planetary carrier 15 rotates, and then drives the planetary gear 11 to mesh with the ring gear 10 and the center wheel 12 through the planetary carrier to increase the speed of the center wheel 12 so as to increase the speed of the inner rotor 8 of the generator. At the same time, the device can also adapt to the flow of tidal current energy in any direction, without designing the convection mechanism of the water turbine unit or the pitch-changing mechanism of the blades.

The integrated semi-direct drive type tidal current energy generating device of the utility model is mainly composed of a pile foundation, an impeller, an integrated semi-direct drive generator and the like. It is a tidal current energy generating device that can adapt to low flow rate and high power. Among them, the pile foundation is the base of the entire power generation device, that is, the carrier. The lower end is driven into the seabed to fix the position of the power generation device; the middle part is connected to the impeller, and the upper end is connected to a semi-direct drive generator extending out of the sea to reduce the difficulty of sealing. The impeller is installed in the middle of the pile foundation, and the inner shaft sleeve is fixedly connected with the pile foundation; the impeller blades and the rotation center are placed perpendicular to the horizontal plane, and the blades receive the impact of the water flow to generate rotation, and then transmit the rotation to the integrated semi-direct drive power generation through the outer shaft cylinder machine structure. The entire integrated semi-direct drive generator box is installed on the top of the pile foundation, and the integrated semi-direct drive generator structure is composed of a planetary gear mechanism and a direct drive motor, which are installed in the same box. The planetary gear system is installed near the end of the impeller, and its internal gear is directly installed on the inner wall of the box, and the outer stator part of the generator is also installed on the inner wall of the box. The rotation of the outer shaft cylinder of the impeller is transmitted to the planetary carrier, and the rotation of the planetary carrier drives the planetary wheel to rotate around the center wheel and its own center. This rotation drives the rotation of the center wheel, increasing the speed of the center wheel, and the center wheel It is designed to be fixedly connected with the rotor shaft of the generator, which realizes the speed-up transmission of the impeller rotation. Some necessary control equipment is installed inside the pile foundation, which is convenient for maintenance personnel to overhaul.

In the above-mentioned pile foundation vertical axis semi-direct drive type tidal current energy generation device, the design of using the pile foundation to fix the power generation device can effectively reduce the It eliminates the interference of wind and waves on the power generation device, which is beneficial to the maintenance and sealing of the unit, and the installation process is also simpler, which is suitable for shallow seas in China; the selection of the vertical shaft impeller can realize the energy capture of the water flow in any direction; The drive generator is integrated into a semi-direct drive generator box design. Compared with the patent of publication number CN102889162A, which only simplifies the speed increasing device to a one-stage speed increase and is simply connected with the direct drive generator with a coupling, From the basic composition of the tidal current power generation device, the reduction of the overall structure and volume of the tidal current power generation unit is realized.

Claims (2)

1. the integrated half directly driving type tidal generating set of pile foundation vertical shaft, it is characterized in that: comprise pile foundation, outer beam barrel, interior beam barrel, casing, planet carrier, central gear, rotor shaft, blade, inner core axle sleeve is contained in pile foundation outside and also and between pile foundation fixes, urceolus axle sleeve is contained in inner core axle outside and is matched by bearing with between inner core axle, the external stability of urceolus axle has wheel hub, blade connects wheel hub by spoke, urceolus axle upper end connected row carrier, along the even installed rows star-wheel of its circumferencial direction on planet carrier, central gear is positioned at all planet wheels centre and is meshed with all planet wheels, central gear encapsulation is outside and fix with rotor shaft at rotor shaft, cabinet wall is fixed with external stator and ring gear, rotor shaft outer cover is equipped with the internal rotor coordinated with external stator, internal rotor is positioned at external stator inside, all planet wheels are all meshed with ring gear, casing and inner sleeve fix, pile foundation comprises the epimere be connected successively, stage casing, hypomere, the epimere of pile foundation and casing are positioned on sea level, the stage casing of pile foundation and blade, wheel hub is positioned at b.s.l..

2. the integrated half directly driving type tidal generating set of a kind of pile foundation vertical shaft according to claim 1, is characterized in that: described pile foundation arranges the hollow structure being used for maintaining and deposit control apparatus.