CN113803216A

CN113803216A - Wind generating set

Info

Publication number: CN113803216A
Application number: CN202111265994.6A
Authority: CN
Inventors: 黄永平
Original assignee: CSIC Haizhuang Windpower Co Ltd
Current assignee: CSIC Haizhuang Windpower Co Ltd
Priority date: 2021-10-28
Filing date: 2021-10-28
Publication date: 2021-12-17
Anticipated expiration: 2041-10-28
Also published as: CN113803216B

Abstract

The invention discloses a wind generating set which comprises a tower barrel, a cabin, a transmission chain system and a wind wheel, wherein the cabin is arranged at the top end of the tower barrel, the transmission chain system is arranged on a rack in the cabin, the wind wheel is connected with the transmission chain system, and the transmission chain system comprises a reduction gearbox and a generator. The reduction box comprises a box body, an input shaft, an input gear pair, a parallel stage gear pair and an output shaft. The input shaft is rotatably arranged in the box body and is connected with the hub of the wind wheel. The input gear pair comprises a first driving wheel and a first driven wheel, the first driving wheel is arranged on the input shaft, and the plurality of first driven wheels are meshed with the first driving wheel. The parallel gear pair is arranged in the box body and is in transmission connection with the first driven wheel, the output shaft is in transmission connection with the parallel gear pair, and the output shaft is connected with the generator. The wind generating set simplifies the structure of the transmission chain of the set, greatly reduces the cost of the set, simplifies the installation and debugging of the set and improves the reliability of the set.

Description

Wind generating set

Technical Field

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

Background

With the price balance of the wind power market, manufacturers of wind power generation sets are required to continuously reduce the manufacturing cost of the whole machine and put higher requirements on the performance of the set. In the wind turbine generator system, the transmission chain is particularly critical as a key system for transmitting power because the transmission chain bears huge working load, and the structural characteristics directly determine the cost and the performance of the generator system.

At present, a traditional wind turbine generator set comprises a wind wheel system, a transmission chain system, an electrical system, a yaw system, a pitch system, a cooling system, a control system, an engine room system, a tower system and the like. The transmission chain system comprises parts such as a hub, a main shaft bearing, a bearing seat, a gear box, a generator, a coupler and the like, wherein the main shaft, the main shaft bearing and the bearing seat jointly form a main shaft part.

The wind turbine drive train system is one of the most critical systems. In the transmission chain, a wind wheel hub is directly arranged at one end of a main shaft, and the main shaft is provided with one group or two groups of bearings for supporting and is connected with a rack through a bearing seat. The other end of the main shaft is connected with the input end of a gear box through an input coupler, the gear box is usually of a multi-stage planetary speed-increasing structure, and the output shaft of the gear box is connected with a generator through an output coupler.

When the wind turbine generator works, various loads such as wind wheel thrust, gravity, transverse load, torque and the like transmitted from the hub end are transmitted to the main shaft and act on a main shaft component, and the main shaft transmits the wind wheel thrust, the gravity and the transverse load to the rack through the main shaft bearing and the bearing seat and transmits the torque to the gear box. The gear box increases the low rotating speed and large torque transmitted by the main shaft to high speed and small torque and then transmits the torque to the generator so as to meet the working requirement of the generator.

The existing traditional wind generating set has the following defects: 1. the transmission chain is provided with an independent main shaft component, and the thrust, gravity, transverse load and torque of a wind wheel from a hub must be transmitted to a frame and a gear box through the main shaft component, so that the unit is complex in structure and difficult to install and debug. 2. The main shaft, the main shaft bearing and the bearing seat which form the main shaft component in the transmission chain need to bear all loads transmitted by the hub end, so the size and the weight are larger, and the weight and the cost of the unit are increased. 3. To accommodate and mount the spindle unit, the frame of the unit needs to be lengthened in axial dimension, increasing the weight and cost of the unit. 4. A main shaft bearing in a transmission chain needs to bear all thrust and gravity of a wind wheel, balance transverse load, and is complex in stress, large in bearing size, difficult to install and adjust, high in price and easy to damage.

Disclosure of Invention

Based on this, it is necessary to provide a wind turbine generator system aiming at the problems of long size, large number of parts, heavy weight, difficult installation and debugging and high cost of the existing wind turbine generator system transmission chain.

The utility model provides a wind generating set, includes a tower section of thick bamboo, cabin, drive chain system and wind wheel, the cabin install in the top of a tower section of thick bamboo, the drive chain system install in on the frame in the cabin, the wind wheel with the drive chain system is connected, the drive chain system includes reducing gear box and generator, the reducing gear box includes:

the box body is arranged on the rack;

the input shaft is rotatably arranged in the box body, extends out of the box body and is connected with a hub of the wind wheel;

the input gear pair comprises a first driving wheel and a first driven wheel, the first driving wheel is arranged on the end part of the input shaft in the box body, the first driven wheel is arranged in the box body, the first driven wheels are distributed around the first driving wheel and are meshed with the first driving wheel, and the first driving wheel and the first driven wheels are helical gears;

the parallel gear pair is arranged in the box body and is in transmission connection with the first driven wheel, and the parallel gear pair is used for realizing speed-up transmission; and

and the output shaft is arranged in the box body, is in transmission connection with the parallel gear pair, extends out of the box body and is connected with the generator.

In one embodiment, the input shaft is provided with support bearings at intervals, and the support bearings are arranged in the box body.

In one embodiment, the input gear pair further comprises a first parallel shaft rotatably mounted in the casing, the first driven wheel is mounted at one end of the first parallel shaft, and the other end of the first parallel shaft is connected with the parallel-stage gear pair.

In one embodiment, a first bearing is arranged on the first parallel shaft, the first bearing is mounted on the box body, and the first bearing on the side, away from the input shaft, of the first driven wheel is a thrust bearing.

In one embodiment, the parallel stage gear pair has a plurality of stages, and the number of split flows is gradually reduced in the transmission path by the power confluence.

In one embodiment, the parallel-stage gear pair includes a second driving wheel, a second driven wheel, a second parallel shaft, a third driving wheel and a third driven wheel, the second driving wheel is mounted at the other end of the first parallel shaft, the second parallel shaft is rotatably mounted in the box, the second driven wheel is mounted at one end of the second parallel shaft, the second driven wheel is engaged with at least one of the second driving wheels, the third driving wheel is mounted at the other end of the second parallel shaft, the third driven wheel is mounted on the output shaft, and the third driven wheel is engaged with a plurality of the third driving wheels.

In one embodiment, the first driven wheel is integrally formed on the first parallel shaft, and the second driven wheel is integrally formed on the second parallel shaft.

In one embodiment, the number of the second driving wheels is a multiple of the number of the second driven wheels, the second driven wheels are located in the area enclosed by the second driving wheels, and each second driven wheel is meshed with a plurality of second driving wheels.

In one embodiment, a connecting shaft penetrates through the output shaft, the third driven wheel is integrally formed on the connecting shaft, and the connecting shaft is flexibly connected with the output shaft.

In one embodiment, the wind turbine generator system further comprises an electrical system, a yaw system, a pitch system, a cooling system and a control system, wherein the electrical system is used for processing electric energy generated by a generator of the unit and then connecting the electric energy to a power grid, the yaw system is connected with the tower barrel and the engine room and used for deflecting the wind turbine, the pitch system is installed in the hub and used for adjusting the pitch angle of the wind turbine blades, the cooling system is used for cooling and protecting gears, bearings and electrical components in a transmission chain, and the control system is used for monitoring the operation state of the unit and controlling the operation of the unit.

The wind generating set at least has the following advantages:

1. a transmission chain system in the unit eliminates a separate main shaft component comprising a main shaft, a main shaft support bearing and a bearing seat structure. The structure of the transmission chain of the unit is greatly simplified, the cost of the unit is greatly reduced, the installation and debugging of the unit are simplified, and the reliability of the unit is improved.

2. An input coupling is eliminated in the unit transmission chain system, and a hub is directly and rigidly connected with an input shaft of a gear box. The structure of the transmission chain of the unit is simplified, the installation difficulty of the unit is reduced, and the cost of the unit is also reduced.

3. As the main shaft part and the input coupling are eliminated from the transmission chain system, the length of the transmission chain is greatly shortened, the length of the frame is correspondingly greatly shortened, the weight is greatly reduced, and the unit cost is reduced.

4. Because the main shaft part and the input coupler are eliminated, and the light-weight design of the frame is adopted, the weight of the engine room is greatly reduced, the hoisting requirement of the unit is reduced, and the hoisting cost of the unit is reduced.

5. A gear box in a transmission chain system of the unit adopts a multi-split parallel transmission structure to accelerate speed, the meshing axial force of an input gear pair can generate a good offsetting effect on the thrust of a wind wheel, and the load of an input shaft supporting bearing which bears the function of a main shaft supporting bearing is greatly reduced. Therefore, the model selection difficulty and the installation and debugging requirements of the input shaft support bearing are reduced; the reliability of the unit is further improved, and the cost of the unit is reduced.

6. The gear box in the unit transmission chain system adopts a multi-shunt parallel transmission structure design, and the multi-shunt gear transmission structures are distributed around the input shaft which bears the main shaft function in parallel, so that the radial space arrangement is fully utilized. A plurality of first from driving wheels can be with the even reposition of redundant personnel of one-level gear pair meshing axial force to a plurality of stress points, reduced single position atress size to make it evenly act on the box outside. Thereby improved the box atress, reduced the degree of difficulty of box structural design, do benefit to lightweight box design, reduced unit cost.

7. Because the length of a transmission chain system in the unit is greatly shortened, the dynamic characteristic of the transmission chain system is obviously improved, the reduction of the resonance frequency of the system is inhibited, the risk that the resonance frequency falls into a working range is reduced, the design difficulty of the unit is reduced, and the reliability of the unit is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention, the drawings, which are required to be used in the embodiments, will be briefly described below. In all the drawings, the elements or parts are not necessarily drawn to actual scale.

FIG. 1 is a schematic diagram of a drive train system in a wind turbine generator set in one embodiment;

FIG. 2 is a cross-sectional view of the gearbox of FIG. 1;

FIG. 3 is a cross-sectional view of the gear box of FIG. 1 from another perspective;

FIG. 4 is a front view of the gearbox of FIG. 1;

FIG. 5 is a cross-sectional view taken along line A-A of FIG. 4;

FIG. 6 is a cross-sectional view taken along line B-B of FIG. 4;

fig. 7 is a cross-sectional view taken along line C-C of fig. 4.

Reference numerals:

10-wheel hub, 20-gear box, 21-box body, 211-front end cover, 212-first shell, 213-second shell, 214-third shell, 215-rear end cover, 22-input shaft, 221-support bearing, 222-connecting flange, 223-connecting boss, 23-input gear pair, 231-first driving wheel, 232-first driven wheel, 233-first parallel shaft, 234-first bearing, 24-parallel stage gear pair, 241-second driving wheel, 242-second driven wheel, 243-second parallel shaft, 244-third driving wheel, 245-third driven wheel, 246-connecting sleeve, 25-output shaft, 26-connecting shaft, 27-rubber joint, 30-generator and 40-frame.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, but rather should be construed as broadly as the present invention is capable of modification in various respects, all without departing from the spirit and scope of the present invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

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 invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

Referring to fig. 1, a wind turbine generator system according to an embodiment includes a tower, a nacelle, a drive chain system, and a wind wheel. The bottom of a tower drum is fixed on the ground through a reinforced concrete foundation structure, and the engine room is installed at the top end of the tower drum. The drive chain system is mounted on a frame 40 within the nacelle, and the wind wheel is connected to the drive chain system. In one embodiment, the drive chain system comprises a reduction gearbox 20 and a generator 30, the reduction gearbox 20 and the generator 30 are mounted on a frame 40, and the reduction gearbox 20 is connected with a hub 10 of a wind wheel and the generator 30 so as to increase the low-rotation-speed large torque of the hub 10 to a high-speed small torque and then transmit the high-speed small torque to the generator 30.

Referring to fig. 2, in one embodiment, the gearbox 20 includes a box 21, an input shaft 22, an input gear pair 23, a parallel stage gear pair 24, and an output shaft 25. The case 21 is mounted on the frame 40, and the case 21 is used for accommodating other parts of the gear box 20. The input shaft 22 is rotatably mounted in the box 21, and the input shaft 22 extends out of the box 21 and is connected with the hub 10 of the wind wheel.

Specifically, the input shaft 22 is provided with support bearings 221 at intervals, and the support bearings 221 are mounted on the box body 21, so that the input shaft 22 can be rotatably mounted in the box body 21. One end of the input shaft 22 gradually increases in diameter in a direction away from the case 21 and is formed with a connecting flange 222, and the connecting flange 222 is rigidly connected to the hub 10 by bolts, so that the input shaft 22 is connected to the hub 10.

Referring to fig. 3, the input gear pair 23 includes a first driving wheel 231 and a first driven wheel 232, the first driving wheel 231 is located in the casing 21, the first driving wheel 231 is installed in the middle of the input shaft 22, the first driven wheel 232 is installed in the casing 21, the plurality of first driven wheels 232 are distributed around the first driving wheel 231 and engaged with the first driving wheel 231, and both the first driving wheel 231 and the first driven wheels 232 are bevel gears. Specifically, the input shaft 22 is provided with a connecting boss 223, and the first driving wheel 231 is mounted on the connecting boss 223 through a bolt, so that the first driving wheel 231 is mounted on the input shaft 22.

Referring to fig. 4 and 5, in one embodiment, the number of the first driven wheels 232 is at least two, and preferably an even number. Specifically, in the present embodiment, the number of the first driven wheels 232 is 8. The first driven wheels 232 may be evenly distributed around the input shaft 22 or unevenly distributed, as desired. In this embodiment, the first driven wheels 232 are uniformly distributed around the input shaft 22, so as to ensure uniform stress on the first driving wheels 231.

In one embodiment, the input gear pair 23 further includes a first parallel shaft 233, the first parallel shaft 233 is rotatably installed in the casing 21, the first driven pulley 232 is installed at one end of the first parallel shaft 233, and the other end of the first parallel shaft 233 is used for connecting the parallel-stage gear pair 24.

On the basis of the above embodiment, further, the first parallel shafts 233 are parallel to the input shaft 22, the number of the first parallel shafts 233 is the same as the number of the first driven wheels 232, a plurality of the first parallel shafts 233 are distributed around the input shaft 22, and one first driven wheel 232 is mounted on each first parallel shaft 233. The first parallel shaft 233 is provided with a first bearing 234, and the first bearing 234 is mounted on the case 21, so that the first parallel shaft 233 is rotatably mounted in the case 21. The opposite sides of the first driving wheel 231 are both provided with first bearings 234, and the first bearing 234 on the side of the first driven wheel 232 far away from the input shaft 22 is thrust bearing to bear the axial thrust of the first driven wheel 232 and transmit the axial thrust to the box body 21.

Wherein, the load that the wind wheel produced all acts on wheel hub 10, because wheel hub 10 is directly connected with the input shaft 22 rigid of gear box 20, wind wheel thrust, gravity, moment of torsion, the horizontal load from wheel hub 10 are all transmitted to input shaft 22. The input shaft 22 transmits the torque to the first driving wheel 231 installed at the middle portion thereof, and the first driving wheel 231 is simultaneously engaged with the plurality of first driven wheels 232, thereby achieving power split transmission and speed increase transmission.

Because the input gear pair 23 adopts the helical gear design, axial forces with the same magnitude and opposite directions are generated on the first driving wheel 231 and the first driven wheel 232 during meshing, and by selecting a proper helical angle, most or all of the axial forces on the first driving wheel 231 and the wind wheel thrust transmitted by the input shaft 22 can be offset, so that the load borne by the support bearing 221 is greatly reduced. The weight of hub 10, the lateral loads and a small part of the remaining rotor thrust are transmitted to casing 21 via support bearings 221 at both ends of input shaft 22 and further to frame 40. The axial force borne by the first driven wheel 232 is transmitted to the thrust bearings, and since the first driven wheel 232 is in multi-split transmission and the number of the thrust bearings is correspondingly multiple, each thrust bearing only bears part of the axial force, and the axial force is transmitted to the box body 21 after being dispersedly borne by the thrust bearing and is transmitted to the frame 40 through the box body 21.

The parallel gear pair 24 is installed in the box body 21 and is in transmission connection with the first driven wheel 232, the output shaft 25 is installed in the box body 21, the output shaft 25 is in transmission connection with the parallel gear pair 24, the output shaft 25 extends out of the box body 21 and is connected with the generator 30, and the parallel gear pair 24 is used for achieving speed-increasing transmission and improving the rotating speed of the output shaft 25. The parallel gear pair 24 may be composed of a first gear pair or a multi-gear pair as required, and the parallel gear pair 24 is connected to the output shaft 25 after the final gear pair is joined.

In one embodiment, the parallel-stage gear pair 24 has a plurality of stages, the parallel-stage gear pair 24 is connected to the other end of the first parallel shaft 233, and the parallel-stage gear pair 24 gradually reduces the split amount by power confluence in the transmission path. In the present embodiment, the parallel-stage gear pair 24 has two stages. It is understood that in other embodiments, the number of the parallel gear pairs 24 may be specifically selected according to the requirement of speed increase.

Specifically, the parallel-stage gear pair 24 includes a second driving wheel 241, a second driven wheel 242, a second parallel shaft 243, a third driving wheel 244 and a third driven wheel 245. The second driving pulley 241 is mounted to the other end of the first parallel shaft 233, and the first driven pulley 232 and the second driving pulley 241 are respectively located at both ends of the first parallel shaft 233. The second parallel shaft 243 is rotatably installed in the case 21, the second driven pulley 242 is installed at one end of the second parallel shaft 243, the second driven pulley 242 is engaged with at least one second driving pulley 241, the third driving pulley 244 is installed at the other end of the second parallel shaft 243, the third driven pulley 245 is installed on the output shaft 25, and the third driven pulley 245 is simultaneously engaged with the plurality of third driving pulleys 244.

The process of increasing the speed of the low-speed large torque to the high-speed small torque by the gearbox 20 is specifically as follows: the first driving wheel 231 drives the first driven wheel 232 to rotate, and since the first driving wheel 231 is meshed with the plurality of first driven wheels 232, the first driven wheels 232 can be accelerated, so that the first-time acceleration transmission is realized.

The first parallel shaft 233 then transmits torque to the second drive wheel 241, and the second drive wheel 241 drives the second driven wheel 242 in rotation. A second step-up drive is achieved in that each secondary driven pulley 242 engages at least one secondary drive pulley 241.

Finally, the second parallel shaft 243 transfers the torque to the third driving wheel 244, and the third driving wheel 244 drives the third driven wheel 245, and thus the output shaft 25. A third step-up drive is achieved because the third driven pulley 245 engages the plurality of third drive pulleys 244. The gear box 20 realizes the speed increase from low rotating speed and large torque to high speed and small torque through three times of speed increasing transmission.

Referring to fig. 3 and 6, in addition to the above embodiment, the number of the second driving wheels 241 is the same as the number of the first driven wheels 232, and each second driving wheel 241 is installed on the corresponding first parallel shaft 233. In this embodiment, the number of the second driving wheels 241 is 8. The number of the second driving wheels 241 is a multiple of the number of the second driven wheels 242, the second driven wheels 242 are located within a circumferential range surrounded by the second driving wheels 241, so that the second driven wheels 242 are conveniently meshed with the second driving wheels 241, and each second driven wheel 242 is meshed with a plurality of second driving wheels 241, thereby realizing speed-increasing transmission.

Specifically, in the present embodiment, the number of the second driving wheels 241 is twice as many as the number of the second driven wheels 242, that is, the number of the second driven wheels 242 is 4, and each of the second driven wheels 242 engages with two adjacent second driving wheels 241. It is understood that in other embodiments, the number of the second driving wheels 241 may be 1 times the number of the second driven wheels 242, the second driven wheels 242 are engaged with the second driving wheels 241 individually, or the number of the second driving wheels 241 and the number of the second driven wheels 242 are 1 times, 2 times or 3 times respectively according to different circumferential distribution positions, as long as each second driven wheel 242 can be normally engaged with the second driving wheel 241.

Referring also to fig. 7, in one embodiment, the second parallel shafts 243 are rotatably mounted in the housing 21 by bearings, the number of the second parallel shafts 243 is the same as that of the second driven pulleys 242, and one second driven pulley 242 is mounted on each second parallel shaft 243. The second parallel axis 243 is parallel to the first parallel axis 233, and the second parallel axis 243 is located between the first parallel axis 233 and the input shaft 22. The number of the third driving wheels 244 is the same as that of the second parallel shafts 243, and the second driven wheels 242 and the third driving wheels 244 are respectively installed at two ends of the second parallel shafts 243. In the present embodiment, the number of the third driving pulleys 244 is 4.

In one embodiment, the first driven wheel 232 is integrally formed on the first parallel shaft 233, the second driven wheel 242 is integrally formed on the second parallel shaft 243, and the first parallel shaft 233 and the second parallel shaft 243 are both gear shafts, so that the installation process is simple and the structure is compact. The third driving pulley 244 surrounds the third driven pulley 245, and a plurality of the third driving pulleys 244 are engaged with the third driven pulley 245. In the present embodiment, 4 third driving wheels 244 are engaged with the third driven wheels 245.

In one embodiment, a connecting sleeve 246 is disposed on the second parallel shaft 243, and the third driving wheel 244 is mounted on the connecting sleeve 246 by bolts, so that the third driving wheel 244 is mounted on the second parallel shaft 243. The output shaft 25 is internally provided with a connecting shaft 26 in a penetrating way, the third driven wheel 245 is integrally formed on the connecting shaft 26, and the connecting shaft 26 is flexibly connected with the output shaft 25. The connection shaft 26 and the output shaft 25 are flexibly connected so that the output shaft 25 can be angularly or radially offset relative to the connection shaft 26 to facilitate connection of the output shaft 25 to the generator 30. Specifically, the connecting shaft 26 is flexibly connected to the output shaft 25 by a rubber joint 27.

In one embodiment, the case 21 includes a front cover 211, a first case 212, a second case 213, a third case 214, and a rear cover 215, which are connected in this order. The input stage gear pair 23 is disposed in the first housing 212, the second driving pulley 241 and the second driven pulley 242 are disposed in the second housing 213 and the third housing 214, and the third driving pulley 244 and the third driven pulley 245 are disposed in the rear end cover 215. The box body 21 is formed by splicing a plurality of parts, and the input-stage gear pair 23 and the parallel-stage gear pair 24 can be conveniently disassembled.

In an embodiment, the wind turbine generator system further includes an electrical system, a yaw system, a pitch system, a cooling system, and a control system, wherein the electrical system is configured to process the electrical energy generated by the generator 30 and then access the electrical network, the yaw system is connected to the tower and the nacelle and is configured to deflect the wind turbine, the pitch system is installed in the hub 10 and is configured to adjust a pitch angle of a blade of the wind turbine, the cooling system is configured to cool and protect a gear, a bearing, and an electrical component in a transmission chain, and the control system is configured to monitor an operating state of the generator and control operation of the generator.

In the wind turbine generator system, the main shaft function is integrated with the structural design of the gear box 20, and the input shaft 22, the support bearing 221, and the box body 21 of the gear box 20 perform the functions of the main shaft, the main shaft bearing, and the bearing seat. There is no independent main shaft component and input coupling in the transmission chain of the unit, and the hub 10 of the wind wheel is directly installed at the input end of the gear box 20. The gearbox 20 in the unit adopts a multi-split parallel transmission technology, and power branches are distributed around an input shaft 22, so that radial space is fully utilized. The input shaft 22 integrates the function of a main shaft and is provided with a first driving gear 231 in the middle, so that the input shaft 22 simultaneously bears the thrust of the wind wheel and the axial force of gear engagement, and mutual counteraction is realized. The multi-split structure simultaneously disperses the meshing axial force (wind wheel thrust) borne by the gearbox 20 according to the split quantity and then transmits the force to the box body 21, so that the load deformation of the box body 21 is reduced. The hub 10 is directly connected with the gear box 20, and a coupler is omitted, so that the complexity of a transmission chain system is reduced, the installation and debugging are simplified, the risk brought by the coupler is reduced, the reliability of the unit is improved, and the cost of the unit is reduced.

The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.

Claims

1. The utility model provides a wind generating set, its characterized in that includes a tower section of thick bamboo, cabin, drive chain system and wind wheel, the cabin install in the top of a tower section of thick bamboo, the drive chain system install in on the frame in the cabin, the wind wheel with the drive chain system is connected, the drive chain system includes reducing gear box and generator, the reducing gear box includes:

the box body is arranged on the rack;

2. The wind generating set of claim 1, wherein the input shaft has support bearings mounted thereon at spaced intervals, the support bearings being mounted within the housing.

3. A wind park according to claim 1, wherein the input gear pair further comprises a first parallel shaft rotatably mounted within the housing, the first driven gear being mounted at one end of the first parallel shaft, the other end of the first parallel shaft being connected to the parallel stage gear pair.

4. A wind turbine according to claim 3, wherein the first parallel shaft is provided with a first bearing, the first bearing is mounted on the housing, and the first bearing on the side of the first driven wheel remote from the input shaft is a thrust bearing.

5. A wind park according to claim 3, wherein the parallel stage gear pair has a plurality of stages, the parallel stage gear pair progressively reducing the number of split flows in the transfer path by power converging.

6. The wind generating set according to claim 5, wherein the parallel stage gear pair comprises a second driving wheel, a second driven wheel, a second parallel shaft, a third driving wheel and a third driven wheel, the second driving wheel is mounted at the other end of the first parallel shaft, the second parallel shaft is rotatably mounted in the box, the second driven wheel is mounted at one end of the second parallel shaft, the second driven wheel is engaged with at least one of the second driving wheels, the third driving wheel is mounted at the other end of the second parallel shaft, the third driven wheel is mounted on the output shaft, and the third driven wheel is engaged with a plurality of the third driving wheels.

7. The wind generating set of claim 6, wherein the first driven wheel is integrally formed on the first parallel shaft and the second driven wheel is integrally formed on the second parallel shaft.

8. The wind generating set of claim 6, wherein the number of secondary drive wheels is a multiple of the number of secondary driven wheels located within the area enclosed by the secondary drive wheels, each secondary driven wheel engaging a plurality of secondary drive wheels.

9. The wind generating set according to claim 6, wherein a connecting shaft penetrates through the output shaft, the third driven wheel is integrally formed on the connecting shaft, and the connecting shaft is flexibly connected with the output shaft.

10. The wind generating set according to claim 1, further comprising an electrical system, a yaw system, a pitch system, a cooling system and a control system, wherein the electrical system is configured to process the electrical energy generated by the generator set and then connect the electrical energy to a power grid, the yaw system is connected to the tower and the nacelle and is configured to deflect the wind turbine, the pitch system is installed in the hub and is configured to adjust a pitch angle of a blade of the wind turbine, the cooling system is configured to cool and protect gears, bearings and electrical components in a drive chain, and the control system is configured to monitor an operating state of the generator set and control an operation of the generator set.