CN111425359A - Transmission chain of wind turbine generator and wind turbine generator comprising same - Google Patents
Transmission chain of wind turbine generator and wind turbine generator comprising same Download PDFInfo
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- CN111425359A CN111425359A CN202010353536.7A CN202010353536A CN111425359A CN 111425359 A CN111425359 A CN 111425359A CN 202010353536 A CN202010353536 A CN 202010353536A CN 111425359 A CN111425359 A CN 111425359A
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- generator
- wind turbine
- bearing
- transmission chain
- turbine generator
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 41
- 238000009434 installation Methods 0.000 claims abstract description 4
- 230000008878 coupling Effects 0.000 claims description 23
- 238000010168 coupling process Methods 0.000 claims description 23
- 238000005859 coupling reaction Methods 0.000 claims description 23
- 238000012423 maintenance Methods 0.000 abstract description 5
- 210000000078 claw Anatomy 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 239000000806 elastomer Substances 0.000 description 2
- 241000054879 Pteris denticulata Species 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D15/00—Transmission of mechanical power
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D9/00—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
- F03D9/20—Wind motors characterised by the driven apparatus
- F03D9/25—Wind motors characterised by the driven apparatus the apparatus being an electrical generator
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Wind Motors (AREA)
Abstract
The invention discloses a transmission chain of a wind turbine generator and the wind turbine generator comprising the same, belonging to the field of wind turbines. The output shaft of the gearbox is connected with the generator rotor through the reverse shaft, namely the output shaft is connected with the generator rotor through the reverse flexible device, so that the length of a transmission chain can be effectively shortened, the length of a rack and other related structural components can be shortened, and the cost can be saved. And adopt this kind of reverse formula to wear the hub connection, can install braking system at the generator afterbody, can further reduce the length of cabin etc. and further reduce the length of driving chain, and braking system installs at the generator afterbody, and the installation and maintenance of being convenient for.
Description
Technical Field
The invention relates to the field of wind turbine generators, in particular to a transmission chain more suitable for a large offshore wind turbine generator and a wind turbine generator comprising the same.
Background
With the development of the wind power industry from land to the sea, the diameter of a wind wheel is continuously increased, the load borne by a fan is also continuously increased, the traditional load transmission path cannot well adapt to the change, and the optimal transmission chain layout cannot be designed.
The traditional transmission chain is designed by splitting, a main bearing, a main shaft and a bearing seat are used as a system, a gear box, a generator and a coupler are also designed separately, the connection among all parts is insufficient, the length of the transmission chain is longer, especially for a large-scale wind turbine generator set with the power of more than 10 megawatts, the size, the weight and the like of the generator set can be greatly increased due to the increase of the length of the transmission chain, the difficulty in transportation, installation and maintenance of the generator set is increased, and the development and utilization of offshore wind energy resources are hindered.
Disclosure of Invention
The invention aims to solve the technical problem of providing a transmission chain of a wind turbine generator and the wind turbine generator comprising the same, which can effectively shorten the length of the transmission chain, thereby shortening the length of the generator and other related structural members and saving the cost.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
on one hand, the invention provides a transmission chain of a wind turbine generator, which comprises a main shaft, a gear box and a generator which are sequentially connected, wherein a bearing and a bearing seat matched with the bearing are arranged on the main shaft, a through hole is formed in the middle of the generator, and an output shaft of the gear box penetrates through the generator through the through hole and is connected with a rotor of the generator through a reverse flexible device.
Further, the reverse flexible means is generally a reverse coupling and is not limited to hydraulic or elastomeric means.
Further, the main shaft is connected with an input shaft of the gear box through a flexible connecting part.
Further, the flexible connecting part is an elastic coupling and is not limited to a hydraulic or elastomer coupling; may be a hydroelastic coupling or an elastic diaphragm coupling.
Further, the bearing adopts a single-row tapered roller bearing.
Further, the number of the bearings on the main shaft is generally two, and the back-to-back arrangement is adopted.
Further, the bearing seat is an integrated bearing seat and is used for being installed on the outer side of the bearing.
Further, the shell of the gearbox is in rigid or flexible connection with the bearing seat.
Further, the shell of the generator is in rigid or flexible connection with the shell of the gearbox.
The electric generator further comprises a brake system and a barring gear, wherein the brake system and the barring gear are mounted at the tail of the generator, and a brake disc of the brake system is toothed and meshed with small teeth on a drive of the barring gear.
Furthermore, the brake system comprises a toothed brake disc which is matched with the barring gear, and the impeller is rotated when the unit is stopped, so that the angle of the impeller meets the requirements of hoisting, maintenance and the like.
On the other hand, the wind turbine generator comprises a rack and further comprises a transmission chain of the wind turbine generator.
Further, the shell of the generator is connected with the frame by adopting a flexible structure.
After adopting such design, the invention has at least the following advantages:
(1) the output shaft of the gearbox is connected with the generator rotor through the reverse shaft, namely the output shaft is connected with the generator rotor through the reverse flexible device, so that the length of a transmission chain can be effectively shortened, the length of a rack and other related structural components can be shortened, and the cost can be saved. And adopt this kind of reverse formula to wear the hub connection, can install braking system at the generator afterbody, can further reduce the length of cabin etc. and further reduce the length of driving chain, and braking system installs at the generator afterbody, and be convenient for install and maintain, can install the barring gear at the generator afterbody simultaneously, convenient operation is maintained. Meanwhile, the shell of the generator is rigidly or flexibly connected with the shell of the gearbox, preferably flexibly connected, so that the load of a bearing in the generator is reduced while a transmission chain is compact;
(2) the flexible connecting part is additionally arranged between the main shaft and the gear box, so that the load can be efficiently transmitted, and a transmission path is optimized; meanwhile, the flexible connecting part can effectively protect main parts such as a bearing, a gear box and the like and reduce the influence of vibration on the main parts, the flexible connecting part can compensate errors generated in working procedures such as processing and assembling, the compensation amount in each direction is large, the influence of the errors on the load of a transmission chain is reduced, and the flexible connecting part is very sensitive and important for a high-power unit.
(3) The invention also adopts the integrated bearing seat, has high processing and assembling precision, can share the load of the gear box on the flexible connecting part by rigidly or flexibly connecting the shell of the gear box with the bearing seat, reduces the load of the bearing and the gear in the gear box, makes the transmission chain more compact and further shortens the length of the transmission chain. Meanwhile, the bearing on the main shaft is a single-row tapered roller bearing which can bear larger axial force and radial force, and is arranged back to back, so that the bearing span is increased, and the bearing capacity is stronger.
Drawings
The foregoing is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and the detailed description.
FIG. 1 is a schematic diagram of the connection of portions of one embodiment of a wind turbine of the present invention;
FIG. 2 is a schematic structural diagram of one embodiment of a drive train of a wind turbine of the present invention;
FIG. 3 is a schematic structural view of one embodiment of a hydroelastic coupling of a drive train of a wind turbine according to the present invention;
FIG. 4 is a schematic structural diagram of another embodiment of the drive train of the wind turbine of the present invention;
FIG. 5 is a schematic structural view of one embodiment of the elastomeric diaphragm coupling of the drive train of the wind turbine of the present invention;
FIG. 6 is a schematic structural diagram of one embodiment of a spacing kit for a drive train of a wind turbine of the present invention;
wherein: 1 is a wind wheel; 2 is a transmission shaft system; 3 is a gear box; 4 is a generator; 5 is a frame; 6 is a tower drum; 7. 10 is a bearing; 8 is a bearing seat; 9 is a main shaft; 11(11 ') is a flexible connecting part (wherein 11 is a hydraulic elastic coupling (111 is a main shaft end connecting claw arm, 112 is a gear box connecting claw arm 112, 113 is a hydraulic elastic body), and 11' is an elastic diaphragm coupling (111 'is a rigid connecting cylinder, 112' is an elastic diaphragm)); 12 is a gearbox input shaft; 13 is a gear box output shaft; 14 is a generator rotor; 15 is a reverse coupling; and 16 is a brake system.
Detailed Description
Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It will be understood by those skilled in the art that, unless otherwise defined, all terms (including 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. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
The invention provides an embodiment of a transmission chain of a wind turbine generator, which comprises a main shaft 9, a gear box 3 and a generator 4 which are sequentially connected as shown in figures 1 to 6, wherein a bearing 7 (or 10) and a bearing seat 8 matched with the bearing 7 (or 10) are arranged on the main shaft 9, and an output shaft 13 of the gear box penetrates through the generator 4 through a through hole in the middle of the generator 4 and is connected with a generator rotor 14 through a reverse flexible device 15. Further, the reverse flexible means 15 is typically a reverse coupling, not limited to hydraulic or elastomeric means.
The output shaft of the gear box penetrates through the generator and is connected with the rotor of the generator through the reverse shaft, so that the length of a transmission chain can be effectively shortened, the length of a rack and other related structural components can be shortened, and the cost can be saved.
And adopt this kind of reverse formula to wear the hub connection, can install braking system 16 in generator 4 afterbody, can further reduce the length of cabin etc. and further reduce the length of driving chain, and braking system installs at the generator afterbody, and the installation and maintenance of being convenient for.
The brake disc of the brake system 16 is provided with teeth and is meshed with small teeth driven by the barring gear 17, the barring gear 17 is arranged at the tail of the generator 4, the number of barring drives is 1 or more, the barring torque of the large-scale wind generating set is large, and the barring system is arranged on a transmission chain, so that the operation and the maintenance are convenient.
On the other hand, in order to make the drive train more compact, the housing of the generator 4 is also rigidly or flexibly, preferably flexibly, connected to the housing of the gearbox 3, and the load on the internal bearings of the generator can also be reduced.
As a modification, the main shaft 9 is connected with an input shaft 13 of the gear box by a flexible connecting part 11 (or 11'). The flexible connecting member 11 (or 11') is generally an elastic coupling, and is not limited to a hydro-elastic coupling or an elastomer coupling; the coupling 11 may be a hydraulic elastic coupling 11 or an elastic diaphragm coupling 11 ', as shown in fig. 2 and 3, wherein the hydraulic elastic coupling 11 includes an annular member, a hydraulic elastic body 113 disposed on the outer periphery of the annular member, and a main shaft end connecting claw arm 111 and a gear box connecting claw arm 112 disposed at intervals on the outer periphery of the annular member, and as shown in fig. 4 and 5, the elastic diaphragm coupling 11 ' includes an annular rigid connecting cylinder 111 ' and elastic diaphragms 112 ' disposed on both sides of the rigid connecting cylinder 111 '.
By adopting the flexible connecting part between the main shaft and the input shaft of the gear box, the compensation amount in each direction is large, and the influence of processing and assembling errors on the gear box is reduced, so that the influence of the errors on the load of a transmission chain is reduced. The large wind generating set is loaded greatly, so that the assembly error requirements of all parts are stricter, the rigid connection hardly meets the error requirements, the transmission chain is loaded disadvantageously, and the flexible connection can well offset the adverse effects caused by the assembly error.
As a further improvement, the shell of the gear box 3 is rigidly or flexibly connected with the bearing seat 8, preferably flexibly connected, and the shell of the gear box 3 is connected with the bearing seat 8, so that the load of the flexibly connected part can be shared, and the load of the bearing and the gear in the gear box can be reduced. If not connect, the load of gear box just leans on flexible connection part to bear the load entirely, through the connection of the bearing frame of gear box shell, just can share load, and the bearing frame adopts the integral type bearing frame simultaneously, can make processing and assembly precision higher on the one hand, and on the other hand, after being connected with the gear box shell, load sharing that can be better.
The rigid connection generally refers to a connection mode of a fixed flange and a bolt, and the flexible connection generally refers to a limit socket connection or other flexible connection modes capable of reducing load, wherein one of the limit socket connection flexible connection modes is shown in fig. 6, and the limit socket connection flexible connection mode adopts a limit sleeve 81 of flexible connection for connection, so that the load can be reduced.
Further, the bearing 7 (or 10) adopts a single-row tapered roller bearing, and can bear large axial force and radial force. Generally, the number of the bearings 7 (or 10) is two, namely the first bearing 7 and the second bearing 10 are arranged back to back, so that the bearing span can be increased, and the bearing capacity is higher.
A preferred embodiment of the present invention is:
the flexible connection is carried out between the main shaft and the input shaft of the gear box by adopting an elastic coupling (a hydraulic or elastic body type coupling), an integrated bearing seat is adopted, the shell of the gear box and the bearing seat are flexibly connected, the output shaft of the gear box penetrates through the generator, the output shaft of the gear box is connected with the rotor of the generator by a reverse coupling, the shell of the gear box and the shell of the generator are flexibly connected, a braking system is arranged at the tail part of the generator, a barring gear is assembled at the tail part of the generator, and the shell of the generator is flexibly connected with the frame. The invention realizes the comprehensive design of each main part of the transmission chain by the elastic elements additionally arranged on each connecting part. The transmission chain is more compact, the length of the transmission chain is greatly shortened, the load transmission path is optimized, the influence of vibration on main parts of the transmission chain is reduced, and the popularization and the application of a large-scale wind driven generator are facilitated.
On the other hand, a wind turbine generator is provided, which comprises a frame 5 and the transmission chain of the wind turbine generator. The shell of the generator 4 is connected with the frame 5 by adopting a flexible structure. The influence of misalignment on the generator can be further reduced.
According to the transmission chain system, the flexible devices additionally arranged between the main shaft and the gear box and between the gear box and the generator are used for efficiently transmitting load and optimizing a transmission path; meanwhile, the flexible device can effectively protect main components such as a bearing, a gear box and the like and reduce the influence of vibration on the main components. And the shell of the gear box is connected with the generator shell and the bearing seat, so that the relation of all the parts is more systematic, and the integrity of the wind turbine generator is better while the compactness of a transmission chain is ensured. The invention comprehensively considers each part in the transmission chain, and integrally designs to find the optimal design scheme of the transmission chain; meanwhile, on the basis of optimizing a load transfer path, the influence of vibration on main parts of the transmission chain can be reduced, the vibration problem is solved from the angle of the whole transmission chain, and the effect is more obvious.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the present invention in any way, and it will be apparent to those skilled in the art that the above description of the present invention can be applied to various modifications, equivalent variations or modifications without departing from the spirit and scope of the present invention.
Claims (10)
1. The utility model provides a driving chain of wind turbine generator system, is including the main shaft, gear box and the generator that connect gradually, install the bearing on the main shaft and with the bearing frame of bearing cooperation installation, its characterized in that, have the through-hole in the middle of the generator, the output shaft of gear box passes through the through-hole passes the generator, is connected with generator rotor through reverse flexible device.
2. The drive chain of a wind turbine generator according to claim 1, wherein the main shaft is connected to the input shaft of the gearbox by a flexible connecting component.
3. The drive chain of a wind turbine according to claim 2, wherein the flexible connecting member is an elastic coupling.
4. The transmission chain of the wind turbine generator according to claim 1, wherein the bearing is a single-row tapered roller bearing;
the number of the bearings on the main shaft is two, and the bearings are arranged back to back.
5. The drive chain of a wind turbine generator according to any one of claims 1 to 4, wherein the bearing seat is an integrated bearing seat for being mounted on the outer side of the bearing.
6. The drive chain of a wind turbine according to any of claims 1 to 5, wherein the housing of the gearbox is rigidly or flexibly connected to the bearing block.
7. The drive train of a wind turbine according to any of claims 1 to 6, wherein the housing of the generator is rigidly or flexibly connected to the housing of the gearbox.
8. The transmission chain of the wind turbine generator set according to any one of claims 1 to 7, further comprising a braking system and a turning gear mounted at the tail of the generator, wherein a brake disc of the braking system is toothed and is engaged with small teeth on a drive of the turning gear.
9. Wind turbine comprising a frame, characterized in that it further comprises a drive train of a wind turbine according to any one of claims 1 to 8.
10. The wind turbine generator set according to claim 9, wherein the housing of the generator is connected to the frame by a flexible structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010353536.7A CN111425359A (en) | 2020-04-29 | 2020-04-29 | Transmission chain of wind turbine generator and wind turbine generator comprising same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010353536.7A CN111425359A (en) | 2020-04-29 | 2020-04-29 | Transmission chain of wind turbine generator and wind turbine generator comprising same |
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| Publication Number | Publication Date |
|---|---|
| CN111425359A true CN111425359A (en) | 2020-07-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010353536.7A Pending CN111425359A (en) | 2020-04-29 | 2020-04-29 | Transmission chain of wind turbine generator and wind turbine generator comprising same |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102628428A (en) * | 2012-04-25 | 2012-08-08 | 东方电气集团东方汽轮机有限公司 | High power wind generating set |
| CN103375349A (en) * | 2012-04-24 | 2013-10-30 | 华锐风电科技(集团)股份有限公司 | Transmission chain of wind generating set and wind generating set |
| CN203809219U (en) * | 2014-01-24 | 2014-09-03 | 上海工程技术大学 | Adjustable flexible connection structure for wind force delivery mechanism |
| CN204419878U (en) * | 2014-12-23 | 2015-06-24 | 东方电气集团东方汽轮机有限公司 | The spindle support structure of Large-scale Wind Turbines |
| CN109026562A (en) * | 2018-10-22 | 2018-12-18 | 国电联合动力技术有限公司 | A kind of barring gear and its wind power generating set of Wind turbines integrated form |
| CN110985313A (en) * | 2020-01-03 | 2020-04-10 | 国电联合动力技术有限公司 | Connecting cabin of semi-direct-drive wind turbine generator and semi-direct-drive wind turbine generator comprising connecting cabin |
| CN212479467U (en) * | 2020-04-29 | 2021-02-05 | 国电联合动力技术有限公司 | Transmission chain of wind turbine generator and wind turbine generator comprising same |
-
2020
- 2020-04-29 CN CN202010353536.7A patent/CN111425359A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103375349A (en) * | 2012-04-24 | 2013-10-30 | 华锐风电科技(集团)股份有限公司 | Transmission chain of wind generating set and wind generating set |
| CN102628428A (en) * | 2012-04-25 | 2012-08-08 | 东方电气集团东方汽轮机有限公司 | High power wind generating set |
| CN203809219U (en) * | 2014-01-24 | 2014-09-03 | 上海工程技术大学 | Adjustable flexible connection structure for wind force delivery mechanism |
| CN204419878U (en) * | 2014-12-23 | 2015-06-24 | 东方电气集团东方汽轮机有限公司 | The spindle support structure of Large-scale Wind Turbines |
| CN109026562A (en) * | 2018-10-22 | 2018-12-18 | 国电联合动力技术有限公司 | A kind of barring gear and its wind power generating set of Wind turbines integrated form |
| CN110985313A (en) * | 2020-01-03 | 2020-04-10 | 国电联合动力技术有限公司 | Connecting cabin of semi-direct-drive wind turbine generator and semi-direct-drive wind turbine generator comprising connecting cabin |
| CN212479467U (en) * | 2020-04-29 | 2021-02-05 | 国电联合动力技术有限公司 | Transmission chain of wind turbine generator and wind turbine generator comprising same |
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