CN109667732B

CN109667732B - Wind generating set

Info

Publication number: CN109667732B
Application number: CN201910126957.3A
Authority: CN
Inventors: 施杨; 吴立建; 闻汇; 杨飞; 崔明; 许爽; 杨红全; 王伶俐; 方攸同
Original assignee: Zhejiang University ZJU; Shanghai Electric Wind Power Group Co Ltd
Current assignee: Zhejiang University ZJU; Shanghai Electric Wind Power Group Co Ltd
Priority date: 2019-02-20
Filing date: 2019-02-20
Publication date: 2020-08-04
Anticipated expiration: 2039-02-20
Also published as: CN109667732A

Abstract

The invention provides a wind generating set, which comprises a bearing system, a fixed shaft and a hub, wherein the bearing system comprises a bearing outer ring and a bearing inner ring, the fixed shaft is connected with the bearing inner ring, and the hub is connected with the bearing outer ring. The wind generating set applies the bearing inner ring sprayed by the air pipeline in the 360-degree circumferential direction, the bearing temperature and the circumferential temperature gradient are effectively controlled, cooling liquid is not used, the process is simple, air is sucked from the outside, air convection is generated in the inner cavity of the hub when the bearing is cooled, heat dissipation is enhanced, and the phenomenon that internal electrical equipment cannot normally work due to overhigh temperature is avoided. Simultaneously, this wind generating set still possesses the cabin ventilation function, saves extra cabin ventilation unit.

Description

Wind generating set

Technical Field

The invention relates to the field of wind power generation, in particular to a wind generating set.

Background

In the field of wind power generation, the large-scale of a wind generating set is the current development trend, and the large-scale of the set inevitably requires the large-scale of a bearing, so that the load of the bearing is also increased continuously, and thus, more serious challenges are provided for the safe operation of the bearing. During the operation of the bearing, the operation temperature is an important factor influencing the safe operation of the bearing. The bearing generates heat in the operation process, heat dissipation needs to be carried out through a cooling system, otherwise, the bearing operates in a high temperature state, and the service life is influenced.

At present, a bearing cooling mode is used, namely air cooling and water cooling, and sometimes a heat pipe radiating assembly is used for radiating in the air cooling mode, however, although the operating temperature of the bearing can be reduced in the mode, the temperature of a region where the heat pipe radiating assembly is arranged is low due to the fact that the distribution of the heat pipe radiating assembly is discrete, and the temperature of a space region of the heat radiating assembly is high, so that a bearing inner ring has a large circumferential temperature gradient, and the service life of the bearing is influenced. The water cooling mode is to cool the bearing inner ring by arranging an annular water cooling pipeline on the bearing inner ring. This kind of mode can effectively reduce bearing operating temperature, and bearing circumference temperature distribution is more even, but needs water-cooling pipe outer wall and bearing inner race to laminate well, consequently has higher to the manufacturing process requirement of annular water-cooling pipe, and has the risk that the coolant liquid leaked.

Disclosure of Invention

The invention aims to overcome the defects that the bearing surface has temperature gradient or the construction requirement for installing a water-cooling pipe is high and cooling liquid is likely to leak in the bearing cooling mode of the wind generating set in the prior art, and provides the wind generating set.

The invention solves the technical problems through the following technical scheme:

the utility model provides a wind generating set, its includes a bearing system, a fixed axle and a wheel hub, bearing system includes a bearing inner race and a bearing inner race, fixed axle connect in the bearing inner race, wheel hub connect in the bearing inner race, its characterized in that, wind generating set still includes an air cooling system, the air cooling system includes an at least air outlet pipeline, air outlet pipeline is located a radius direction of bearing inner race, air outlet pipeline can wind the central point position of bearing inner race is rotatory.

Preferably, the air cooling system further comprises an air inlet pipeline, one end of the air inlet pipeline is communicated with one end of the air outlet pipeline, which is close to the central point of the bearing inner ring, and the other end of the air inlet pipeline is located on the inner side of the hub.

Preferably, a supporting device is connected to an end surface of the air inlet pipeline close to the air outlet pipeline, and the supporting device is used for fixing the air inlet pipeline.

Preferably, the supporting device includes at least one supporting rod, one end of the supporting rod is fixedly connected to the outer surface of the air inlet pipeline, and the other end of the supporting rod is fixedly connected to the inner side of the hub. The supporting rod is used for fixing one end, connected with the air outlet pipeline, of the air inlet pipeline so as to avoid overlarge load of bending deformation of the air inlet pipeline due to gravity and centrifugal force caused by rotation in the rotating process.

Preferably, the other end of the air inlet pipeline is connected to the inner wall of the windward side of the hub.

Preferably, the other end of the air inlet pipeline is connected to the central position of the windward side of the hub.

Preferably, the direction of the air inlet pipeline is perpendicular to the direction of the air outlet pipeline, and the central point of the windward side of the hub is located on the central axis of the air inlet pipeline.

Preferably, an opening is formed in the center of the windward side of the hub, and the diameter of the air inlet pipeline is not smaller than that of the opening.

Preferably, a fan device is arranged inside the air inlet pipeline, the fan device is fixed on the inner pipe wall of the air inlet pipeline, and the fan device is used for sucking air into the air inlet pipeline and the air outlet pipeline.

Preferably, the fan device includes a fan and a control device, the control device is mounted on the fan, and the control device is used for controlling the rotating speed of the fan. The control device can change the air flow velocity in the air inlet pipeline by controlling the rotating speed of the fan, so as to change the cooling efficiency of the air cooling system.

Preferably, an air filtering device is arranged near the fan device, the periphery of the air filtering device is fixed on the inner side of the pipe wall of the air inlet pipeline, and the air filtering device is used for filtering air entering the air inlet pipeline from the outside. The air filtering device can filter external cooling air, remove moisture and impurities in the air and then convey the air into the air outlet pipeline, so that the wind generating set is prevented from being damaged by the impurities in the cooling air.

Preferably, a sealing plate is arranged at one end of the air outlet pipeline close to the bearing inner ring, and a plurality of openings are distributed on the sealing plate. The hole can enhance the air flow rate at the opening of the air outlet pipeline and enable the flow rate to be uniformly distributed, so that the cooling efficiency of the cooling system is enhanced, and the cooling of the bearing system is accelerated.

Preferably, the length of the air outlet pipeline is smaller than the radius of the inner side surface of the bearing inner ring.

Preferably, the air cooling system further comprises a driving device, the driving device is located at one end of the air outlet pipeline close to the central point of the bearing inner ring, and the driving device is used for driving the air outlet pipeline to rotate around the central point of the bearing inner ring.

Preferably, the driving device includes a supporting rod, a driving bearing and a motor, one end of the supporting rod is fixed on the fixing shaft, the other end of the supporting rod is fixedly connected to the driving bearing, and the motor is connected to the driving bearing and used for driving the driving bearing to rotate.

Preferably, the driving device further comprises an electric control device, the electric control device is connected to the motor, and the electric control device is used for controlling the rotating speed of the driving bearing. The power control device can be used for correspondingly adjusting the rotating speed of the driving bearing according to different external temperatures and the temperature of the bearing inner ring.

Preferably, the air cooling system further comprises an air inlet pipeline, one end of the air inlet pipeline is connected to one end of the driving bearing, and the other end of the air inlet pipeline is located in the inner space of the cabin of the wind generating set.

Preferably, one end of the air inlet pipeline is connected to one end of the driving bearing, and the other end of the air inlet pipeline is connected to a cabin wall of the wind generating set.

Preferably, the drive bearing is cylindrical, one end of the drive bearing is closed, and the side wall of the drive bearing is provided with an opening which is connected with one end of the air outlet pipeline.

The positive progress effects of the invention are as follows:

the wind generating set applies the cooling air pipeline to position and spray the bearing inner ring, and realizes a circumferential 360-degree cooling mode of the bearing through the rotation of the air pipeline, thereby effectively controlling the running temperature and the circumferential temperature gradient of the bearing, avoiding the problems of complex manufacturing process and the risk of leakage of cooling liquid, and because cooling air is sucked from the outside, the internal cavity of the hub generates air convection when the bearing is cooled, strengthening the heat dissipation in the cavity, and avoiding the situation that the electric equipment near the hub cannot normally work due to overhigh temperature. Meanwhile, the wind generating set can also have a cabin ventilation function, and an additional cabin ventilation device can be saved.

Drawings

Fig. 1 is a schematic structural view of a wind turbine generator system according to embodiment 1 of the present invention.

Fig. 2 is a schematic structural view of a wind turbine generator system according to embodiment 2 of the present invention.

Fig. 3 is a schematic structural view of a wind turbine generator system according to embodiment 3 of the present invention.

Description of reference numerals:

bearing outer ring 11

Bearing inner race 12

Fixed shaft 2

Hub 3

Air outlet pipe 41

Closing plate 42

Air inlet pipeline 43

Fan device 44

Air filter 45

Support device 5

Drive bearing 61

Support bar 62

Detailed Description

The present invention will be more clearly and completely described in the following three preferred embodiments with reference to the attached drawings.

Example 1

As shown in fig. 1, the present invention provides a wind turbine generator system, which includes a bearing system, wherein the bearing system includes a bearing outer ring 11 and a bearing inner ring 12. The wind generating set further comprises a fixed shaft 2 and a hub 3, the fixed shaft 2 is fixed with the bearing inner ring 12, and the hub 3 is fixed with the bearing outer ring 11. The wind generating set also comprises an air cooling system which comprises an air outlet pipeline 41 and an air inlet pipeline 43, wherein the air outlet pipeline 41 is positioned in the radial direction of the bearing inner ring 12, one end of the air outlet pipeline is aligned with the inner side surface of the bearing inner ring 12, and a part of gap is reserved between the air outlet pipeline 41 and the inner side surface of the bearing inner ring 12. The air outlet pipe 41 can rotate around the central point of the bearing inner ring 12. Preferably, the wind generating set is provided with two air outlet pipelines 41, one ends of the two air outlet pipelines 41 are located at the central point of the bearing inner ring 12, the two air outlet pipelines 41 are located on the same straight line, and the direction of the air inlet pipeline 43 is perpendicular to the direction of the air outlet pipeline 41.

One end of the air inlet pipeline 43 is welded and communicated with one end of the air outlet pipeline 41, which is positioned at the central point of the bearing inner ring 12, and the other end is positioned in the inner space of the hub. In order to achieve a stable rotation effect, the other end of the air inlet pipeline 43 is welded to the central position of the inner wall of the windward side of the hub 3, and the central point of the windward side of the hub 3 is located on the central shaft of the air inlet pipeline 43. The central position of the windward side of the hub 3 is provided with an opening, and the diameter of the air inlet pipeline 43 is slightly larger than that of the opening. A supporting device 5 is connected to an end surface of the air inlet pipe 43 near the air outlet pipe 41, for fixing the air inlet pipe 43. The supporting device 5 comprises two supporting rods, and an angle of 180 degrees is formed between the two supporting rods. One end of each of the two support rods is welded to the outer surface of the air inlet pipeline 43, and the other end of each of the two support rods is welded to the inner side surface of the hub 3. The support by the support device 5 can avoid the overlarge load of bending deformation of the air inlet pipeline 43 caused by the action of the rotating centrifugal force and gravity during the rotation of the hub 3 and the bearing outer ring 11. A greater number of support rods may be used to achieve a better fixation of the air inlet duct 43.

A fan device 44 is installed at an end of the air inlet pipeline 43 close to the bearing inner ring 12, and is installed at the inner side of the pipe wall of the air inlet pipeline 43 through bolts, and the fan device 44 is used for sucking the air in the air inlet pipeline 43 into the air outlet pipeline 41. The fan unit 44 includes a fan and a control unit mounted to the fan for controlling the rotational speed of the fan. An air filter device 45 is installed at the inner side of the wall of the air inlet duct 43 at the wind upstream of the fan device 44 for filtering the air in the air inlet duct 43. The air filter device 45 filters the air in the intake duct 43 to remove moisture and impurities, and then delivers the filtered air to the exhaust duct 41, thereby preventing corrosion of the equipment and components in the cabin. Alternatively, the air filter device 45 may be installed downstream of the fan device 44 in the wind direction, so as to achieve a more uniform air flow field.

One end of the air outlet pipeline 41 close to the bearing inner ring 12 is provided with a sealing plate 42, and uniformly distributed holes are distributed on the sealing plate for enhancing the air flow rate at the opening of the air outlet pipeline 41 and enabling the air flow rate to be uniform, so that the cooling efficiency of the air cooling system is improved. Alternatively, other aperture arrangements may be used to increase the air flow rate over the surface of plate 42.

After the wind power generator set system starts to operate, the hub 3 rotates to drive the air cooling system to rotate, then the air outlet pipeline 41 rotates around one end of the air outlet pipeline, and the other end of the air outlet pipeline sprays air to the inner surface of the bearing inner ring 12, so that the effect of cooling the bearing inner ring 12 is achieved.

Example 2

As shown in fig. 2, the structure of the present embodiment is substantially the same as that of embodiment 1, except that: the air cooling system further comprises a driving device which comprises two supporting rods 62 and a driving bearing 61, wherein one end of each supporting rod 62 is welded on the fixed shaft 2, and the other end of each supporting rod 62 is connected with the driving bearing 61. The driving device further comprises a motor connected to the inside of the driving bearing 61 for driving the driving bearing 61 to rotate. The drive bearing 61 is located at the center point of the bearing inner ring 12 and can rotate around the center point. One end of the air inlet pipeline 43 is communicated with and fixed to the driving bearing 61, and the other end is positioned in the inner space of the cabin of the wind generating set.

The drive bearing 61 is also provided with an electric control device, and the rotation speed of the drive bearing 61 is controlled by controlling the motor. During use, the power control device can be manually controlled to adjust the rotational speed of the motor, and thus the rotational speed of the drive bearing 61. How the power control device controls the motor and how the motor drives the driving bearing 61 belongs to the prior art, and therefore, the detailed description thereof is omitted.

The driving bearing 61 is cylindrical, one end of one side of the driving bearing is closed, an opening is formed in the side wall of the driving bearing, and one end of the air outlet pipeline 41 is welded to the opening, namely the air outlet pipeline 41, the driving bearing 61 and the air inlet pipeline 43 are communicated. In order to achieve a better heat dissipation effect on the bearing inner ring 12, more air outlet pipes 41 can be used.

After the system of the wind generating set starts to operate, the driving device is started after the surface temperature of the bearing inner ring 12 rises to a certain degree, so that the air cooling system starts to rotate around the central point of the bearing inner ring 12, then the air outlet pipeline 41 is driven to rotate, then the fan device 44 is started, the air inlet pipeline 43 extracts air from the cabin of the wind generating set and sprays the air to the surface of the bearing inner ring 12, and the effects of cooling are achieved.

Example 3

As shown in fig. 3, the structure of the present embodiment is substantially the same as that of embodiment 2, except that: one end of the air inlet pipeline 43 is communicated with and fixed to the driving bearing 61, and the other end of the air inlet pipeline 43 is welded to the cabin wall of the wind turbine generator system.

After the system of the wind generating set starts to operate, the driving device is started after the surface temperature of the bearing inner ring 12 rises to a certain degree, so that the air cooling system starts to rotate around the central point of the bearing inner ring 12, then the air outlet pipeline 41 is driven to rotate, then the fan device 44 is started, outside cooling air is extracted through the air inlet pipeline 43 and is sprayed to the surface of the bearing inner ring 12, and the effects of cooling and cooling are achieved.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or component being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention.

While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.

Claims

1. The utility model provides a wind generating set, its includes a bearing system, a fixed axle and a wheel hub, bearing system includes a bearing inner race and a bearing inner race, fixed axle connect in the bearing inner race, wheel hub connect in the bearing inner race, a serial communication port, wind generating set still includes an air cooling system, the air cooling system includes an at least air outlet pipeline, air outlet pipeline's one end is aimed at the inboard surface of bearing inner race, air outlet pipeline is located a radius direction of bearing inner race, air outlet pipeline can wind the central point position of bearing inner race is rotatory.

2. The wind generating set according to claim 1, wherein the air cooling system further comprises an air inlet pipeline, one end of the air inlet pipeline is communicated with one end of the air outlet pipeline close to the central point of the bearing inner ring, and the other end of the air inlet pipeline is located inside the hub.

3. The wind turbine of claim 2, wherein a support device is attached to an end surface of the air inlet duct adjacent to the air outlet duct, the support device being configured to secure the air inlet duct.

4. A wind park according to claim 3, wherein the support means comprises at least one support rod, one end of which is fixedly connected to the outer surface of the air inlet duct and the other end of which is fixedly connected to the inside of the hub.

5. The wind turbine of claim 4, wherein the other end of the air intake duct is connected to the hub at an inner wall of the windward side thereof.

6. The wind turbine of claim 5, wherein the other end of the air inlet pipe is connected to a central position of the windward side of the hub.

7. The wind generating set according to claim 6, wherein the direction of the air inlet pipeline is perpendicular to the direction of the air outlet pipeline, and the center point of the windward side of the hub is located on the central axis of the air inlet pipeline.

8. The wind turbine of claim 7, wherein the hub has an opening in a center of a windward side of the hub, and the diameter of the air inlet duct is not smaller than the diameter of the opening.

9. The wind generating set according to claim 2, wherein a fan device is disposed inside the air inlet duct, the fan device being fixed to an inner wall of the air inlet duct, the fan device being configured to draw air into the air inlet duct and the air outlet duct.

10. A wind park according to claim 9, wherein said fan means comprises a fan and a control means, said control means being mounted to said fan, said control means being adapted to control the speed of rotation of said fan.

11. The wind generating set according to claim 10, wherein an air filtering device is disposed adjacent to the fan device, the air filtering device is fixed to the inner side of the wall of the air inlet pipe at the periphery thereof, and the air filtering device is used for filtering air entering the air inlet pipe from the outside.

12. The wind turbine of claim 1, wherein the end of the outlet duct adjacent the bearing cone has a sealing plate with a plurality of openings disposed therein.

13. The wind generating set of claim 1, wherein the length of the air outlet conduit is less than the radius of the inner side of the bearing inner race.

14. The wind generating set according to claim 1, wherein the air cooling system further comprises a driving device, the driving device is located at an end of the air outlet pipeline close to the central point of the inner bearing ring, and the driving device is configured to drive the air outlet pipeline to rotate around the central point of the inner bearing ring.

15. The wind generating set according to claim 14, wherein the driving device comprises a support rod, a driving bearing and a motor, one end of the support rod is fixed on the fixed shaft, the other end of the support rod is fixedly connected to the driving bearing, and the motor is connected to the driving bearing and used for driving the driving bearing to rotate.

16. The wind generating set of claim 15, wherein the drive assembly further comprises a power control assembly, the power control assembly coupled to the motor, the power control assembly configured to control a rotational speed of the drive bearing.

17. The wind turbine of claim 16, wherein the air cooling system further comprises an air intake conduit, one end of the air intake conduit is connected to one end of the drive bearing, and the other end of the air intake conduit is located in an interior space of a nacelle of the wind turbine.

18. The wind generating set according to claim 17, wherein one end of the air intake conduit is connected to one end of the drive bearing and the other end of the air intake conduit is connected to a cabin wall of the wind generating set.

19. The wind turbine of claim 18, wherein the drive bearing is cylindrical, and wherein the drive bearing is closed at one end and has an opening in a side wall, the opening being connected to an end of the outlet duct.