CN115750241A - Hub heat dissipation device of wind turbine generator - Google Patents
Hub heat dissipation device of wind turbine generator Download PDFInfo
- Publication number
- CN115750241A CN115750241A CN202211367392.6A CN202211367392A CN115750241A CN 115750241 A CN115750241 A CN 115750241A CN 202211367392 A CN202211367392 A CN 202211367392A CN 115750241 A CN115750241 A CN 115750241A
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- heat dissipation
- hub
- wind turbine
- turbine generator
- adjusting
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- 230000017525 heat dissipation Effects 0.000 title claims abstract description 107
- 150000003839 salts Chemical class 0.000 claims abstract description 34
- 239000003595 mist Substances 0.000 claims abstract description 20
- 238000007791 dehumidification Methods 0.000 claims abstract description 15
- 238000001816 cooling Methods 0.000 claims abstract description 8
- 230000005540 biological transmission Effects 0.000 claims description 11
- 238000009434 installation Methods 0.000 claims description 5
- 238000001514 detection method Methods 0.000 abstract description 16
- 238000005260 corrosion Methods 0.000 abstract description 5
- 230000007797 corrosion Effects 0.000 abstract description 5
- 239000007921 spray Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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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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Abstract
The invention discloses a hub heat dissipation device of a wind turbine generator, which comprises a cabin, a hub cover, a cabin dehumidification salt mist system, a heat dissipation system, a hub, a temperature detection element and a pressure difference detection element, wherein the temperature detection element comprises the following components: the hubcap sets up in cabin one side, and cabin dehumidification salt fog system sets up inside the cabin, and wheel hub installs inside the hubcap, and cooling system sets up in the wheel hub middle part, and temperature detecting element and pressure difference detecting element correspond and set up on wheel hub. The invention utilizes the air flow velocity and the pressure difference between the outside and the inside of the hub cover to quickly dissipate heat, ensures that the air in the hub always keeps a dry environment of micro-positive pressure, and effectively avoids salt mist corrosion of electrical equipment in the hub, thereby prolonging the service life of the wind turbine generator.
Description
Technical Field
The invention belongs to the technical field of wind turbine generator heat dissipation, and particularly relates to a hub heat dissipation device of a wind turbine generator.
Background
With the adoption of the wind generating set with high megawatt as the mainstream of the industry, in order to improve the generating capacity, the wind generating set equipment with a high tower and a large wind wheel is generally adopted.
Generally, a hub heat dissipation device of a wind turbine generator is characterized in that an axial flow fan is singly designed in a hub cover to enhance air flow of the hub cover, and air exchange is carried out between a gap of the hub cover and an external environment. However, for an offshore wind turbine generator, the outside is a strong salt spray corrosion environment, and the humid salt spray air can be introduced only by the bidirectional air flow inside the hub, so that electrical equipment in the hub is corroded, and possible unit faults are caused.
Disclosure of Invention
In order to at least partially solve the technical problems in the prior art, the invention provides a hub heat dissipation device of a wind turbine generator.
The invention discloses a hub heat dissipation device of a wind turbine generator, which comprises a cabin, a hub cover, a cabin dehumidification salt mist system, a heat dissipation system, a hub, a temperature detection element and a pressure difference detection element, wherein the hub cover is arranged on one side of the cabin, the cabin dehumidification salt mist system is arranged in the cabin, the hub is arranged in the hub cover, the heat dissipation system is arranged in the middle of the hub, and the temperature detection element and the pressure difference detection element are correspondingly arranged on the hub, wherein:
the engine room comprises an engine room cover, a multifunctional baffle plate and a main transmission system, wherein the multifunctional baffle plate is arranged on the outer side of the engine room cover in a surrounding mode, and the main transmission system is arranged in the middle of the engine room cover;
the cabin dehumidification salt mist system comprises an electric shutter, a salt mist filter, an axial flow fan system, a hose assembly and a control element, wherein the salt mist filter is arranged on the electric shutter, the axial flow fan system is arranged on the salt mist filter, the control element is arranged on the axial flow fan system, and the hose assembly is connected with the axial flow fan system;
the heat dissipation system comprises a first heat dissipation support, a second heat dissipation support, heat dissipation blades, an adjusting device, a heat dissipation driving device and a limiting device, wherein the first heat dissipation support and the second heat dissipation support are correspondingly arranged, the heat dissipation driving device is arranged between the first heat dissipation support and the second heat dissipation support, the heat dissipation assembly is installed on the heat dissipation driving device through the adjusting device, and the limiting device is arranged on the heat dissipation driving device.
Further, in the hub heat dissipation device of the wind turbine generator system, the hose assembly includes a first hose and a second hose, one end of the first hose is communicated with an output end of the axial flow fan system, the other end of the first hose is connected with the second hose, and the other end of the second hose penetrates through the main transmission system and is communicated with the hub cover.
Further, in the wheel hub heat abstractor of above-mentioned wind turbine generator system, heat dissipation drive arrangement includes driving motor, actuating lever and mount table, the actuating lever with the driving motor output is connected, the mount table welds evenly on the actuating lever, the actuating lever with first heat dissipation support with the pivot is connected between the second heat dissipation support, driving motor with second heat dissipation support fixed connection.
Further, in the hub heat dissipation device of the wind turbine generator system, a connection table is arranged at the tail end of each heat dissipation blade, and the connection table is connected with the installation table through a rotating shaft.
Further, in the hub heat dissipation device of the wind turbine generator system, the adjusting device includes an adjusting table, an adjusting pressure spring and an adjusting block, one end of the adjusting pressure spring is welded to the adjusting table, and the other end of the adjusting pressure spring is welded to the adjusting block;
the adjusting platform is connected with the mounting platform rotating shaft, and the adjusting block is connected with the outer side of the connecting platform in a sliding mode.
Further, in the hub heat dissipation device of the wind turbine generator system, one side of the driving rod, which is close to the mounting table, is welded with a tension spring, and the other end of the tension spring is welded with the inner side of the connecting table.
Further, in the hub heat dissipation device of the wind turbine generator system, a heat dissipation channel is enclosed between the hub cover and the hub, and a heat dissipation hole is enclosed between the hub cover and the multifunctional baffle.
The hub heat dissipation device of the wind turbine generator has the following advantages and beneficial effects:
in summary, compared with the prior art, the hub heat dissipation device of the wind turbine generator set has the following advantages and beneficial effects: the heat dissipation speed of the hub heat dissipation device can be adjusted through the heat dissipation system according to the internal temperature of the hub, and the hub heat dissipation device is matched with a dehumidification salt mist system in a cabin, so that the requirement of air flowing and cooling in the hub is met, the dry environment that air in the hub keeps micro-positive pressure all the time is ensured, salt mist corrosion of electrical equipment in the hub is effectively avoided, and the service life of a wind turbine generator is prolonged.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only used for further understanding of the embodiments of the present invention and constitute a part of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts. In the drawings:
FIG. 1 is a front view of a hub heat sink for a wind turbine according to the present invention;
FIG. 2 is an enlarged view of the structure A in FIG. 1;
fig. 3 is a left side view of the hub heat sink of the wind turbine generator of the present invention.
Description of the reference numerals:
1: nacelle, 11: nacelle cover, 12: multifunctional baffle, 13: a main transmission system;
2: a hubcap;
3: cabin dehumidification salt spray system, 31: electric blind, 32: salt mist filter, 33: an axial flow fan system,
34: hose assembly, 341: first hose, 342: a second hose,
35: a control element;
4: heat dissipation system, 41: first heat dissipation bracket, 42: a second heat dissipation bracket,
43: cooling fin, 431: a connecting platform,
44: adjusting device, 441: adjusting stage, 442: adjusting a pressure spring 443: an adjusting block,
45: heat dissipation driving device, 451: drive motor, 452: drive lever, 453: an installation platform,
46: stop device, 47: a tension spring;
5: a heat dissipation channel; 6: heat dissipation holes; 7: a hub; 8: a temperature detection element; 9: a pressure difference detecting element.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 to 3, the hub heat dissipation device of a wind turbine generator system of the present invention includes a nacelle 1, a hubcap 2, a nacelle dehumidification salt fog system 3, a heat dissipation system 4, a hub 7, a temperature detection element 8, and a pressure difference detection element 9, wherein the hubcap 2 is disposed on one side of the nacelle 1, the nacelle dehumidification salt fog system 3 is disposed inside the nacelle 1, the hub 7 is mounted inside the hubcap 2, the heat dissipation system 4 is disposed in the middle of the hub 7, and the temperature detection element 8 and the pressure difference detection element 9 are correspondingly disposed on the hub 7, wherein:
the engine room 1 comprises an engine room cover 11, a multifunctional baffle 12 and a main transmission system 13, wherein the multifunctional baffle 12 is arranged on the outer side of the engine room cover 11 in a surrounding manner, and the main transmission system 13 is arranged in the middle of the engine room cover 11;
the cabin dehumidification salt mist system 3 comprises an electric shutter 31, a salt mist filter 32, an axial flow fan system 33, a hose assembly 34 and a control element 35, wherein the salt mist filter 32 is arranged on the electric shutter 31, the axial flow fan system 33 is arranged on the salt mist filter 32, the control element 35 is arranged on the axial flow fan system 33, and the hose assembly 34 is connected with the axial flow fan system 33;
the heat dissipation system 4 includes a first heat dissipation bracket 41, a second heat dissipation bracket 42, heat dissipation blades 43, an adjusting device 44, a heat dissipation driving device 45 and a limiting device 46, wherein the first heat dissipation bracket 41 and the second heat dissipation bracket 42 are correspondingly disposed, the heat dissipation driving device 45 is disposed between the first heat dissipation bracket 41 and the second heat dissipation bracket 42, the heat dissipation assembly is mounted on the heat dissipation driving device 45 through the adjusting device 44, and the limiting device 46 is disposed on the heat dissipation driving device 45.
Further, in the hub heat dissipation device of the wind turbine generator system, the hose assembly 34 includes a first hose 341 and a second hose 342, one end of the first hose 341 is communicated with the output end of the axial flow fan system 33, the other end of the first hose 341 is connected with the second hose 342, and the other end of the second hose 342 is communicated with the hub cover 2 through the main transmission system 13, so that it is effectively ensured that air treated by the cabin dehumidification salt spray system 3 enters the hub cover 2, thereby ensuring that air in the hub 7 always maintains a dry environment of micro-positive pressure, and avoiding salt spray corrosion of electrical equipment in the hub.
Further, in the hub heat dissipation device of the wind turbine generator, the heat dissipation driving device 45 includes a driving motor 451, a driving rod 452 and an installation platform 453, the driving rod 452 is connected with an output end of the driving motor 451, the installation platform 453 is uniformly welded on the driving rod 452, the driving rod 452 is connected with the first heat dissipation bracket 41 and the second heat dissipation bracket 42 through a rotating shaft, and the driving motor 451 is fixedly connected with the second heat dissipation bracket 42, so that the driving motor 451 is effectively guaranteed to provide power for the driving rod 452.
Further, in the hub heat dissipation device of the wind turbine generator, the connecting platform 431 is arranged at the tail end of the heat dissipation blade 43, and the connecting platform 431 is connected with the mounting platform 453 in a rotating shaft mode, so that the heat dissipation blade 43 can be effectively opened and closed.
Further, in the hub heat dissipation device of the wind turbine generator, the adjusting device 44 includes an adjusting platform 441, an adjusting pressure spring 442 and an adjusting block 443, one end of the adjusting pressure spring 442 is welded to the adjusting platform 441, and the other end of the adjusting pressure spring 442 is welded to the adjusting block 443; the adjusting platform 441 is connected with the mounting platform 453 through a rotating shaft, and the adjusting block 443 is connected with the outer side of the connecting platform 431 in a sliding manner, so that the opening and closing angle of the radiating blade 43 can be effectively adjusted according to the centrifugal force of the driving rod 452.
Further, in the hub heat dissipation device of the wind turbine generator, a tension spring 47 is welded on one side of the driving rod 452 close to the mounting platform 453, and the other end of the tension spring 47 is welded on the inner side of the connecting platform 431, so that the heat dissipation blade 43 can be effectively ensured to be in a closed state when the wind turbine generator stops working.
Furthermore, in the hub heat dissipation device of the wind turbine generator, the heat dissipation channel 5 is enclosed between the hub cover 2 and the hub 7, and the heat dissipation holes 6 are enclosed between the hub cover 2 and the multifunctional baffle 12, so that the one-way air circulation formed inside the hub 7 of the whole wind turbine generator is effectively ensured, the air inside the hub 7 is always kept in a dry environment with micro-positive pressure, and the salt spray corrosion of electrical equipment in the hub 7 is avoided.
Specifically, the method comprises the following steps: the temperature detection element 8 detects the temperature inside the hub 7 at all times. When the wind turbine is operating, the hub 7 rotates at a certain rotational speed, and at this time, the electric elements in the hub 7 start to operate, accompanied by heat generation. When the temperature in the hub 7 exceeds the set value of the temperature detection element, the stopper 46 is opened, the heat radiation blades 43 are opened and closed by the centrifugal force, and then the driving motor 451 automatically controls the rotation speed according to the temperature variation in the hub 7. The cooling blades 43 can compress the adjusting pressure spring 442 according to the rotating speed of the wind wheel, and simultaneously the tension spring 47 is stretched, so that a certain angle is opened, the wind catching area of the cooling blades 43 is adjusted, the cabin dehumidification salt mist system 3 supplies dry salt mist-free air which is processed into the hub 7 through the inner cavity of the main transmission system 13 uninterruptedly, and a program can adjust the flow of the air supplied into the hub 7 according to the numerical value of the pressure difference detection element 9. Utilize the outside and inside air flow rate and the pressure differential of hubcap 2, the air that carries the heat can get into heat dissipation channel 5, discharge fast by louvre 6, whole wind turbine generator system wheel hub 7 is inside to form a one-way air cycle, guarantee that the interior air of wheel hub keeps the dry environment of pressure-fired pressure all the time, the salt fog of the interior electrical equipment of wheel hub 7 has been avoided corroding, when driving motor 451 stops the drive or wheel hub 7 temperature is less than the setting value of temperature detection original paper, adjust the resilience force that pressure spring and extension spring 47 produced, retrieve in the stop device radiator blade 43, radiator blade 43 does not influence operating personnel's normal current when guaranteeing to shut down to overhaul, sufficient maintenance space has effectively been ensured.
In summary, compared with the prior art, the hub heat dissipation device of the wind turbine generator set has the following advantages and beneficial effects: wheel hub heat abstractor is convenient for overhaul and is maintained, and the accessible cooling system adjusts radiating rate according to the inside temperature of wheel hub, dispels the heat fast, and the dehumidification salt fog system in the cooperation cabin had both guaranteed the mobile cooling requirement of the air in the wheel hub, had ensured the dry environment that the interior air of wheel hub kept the pressure-fired throughout again, had effectively avoided the salt fog of the interior electrical equipment of wheel hub to corrode to improve wind turbine generator system life.
It is noted that, unless expressly stated or limited otherwise, the term "coupled" or its synonymous is intended to mean "coupled", as used herein, including, for example, fixedly attached or removably attached; can be mechanically or electrically connected; the two elements can be directly connected or indirectly connected through an intermediate medium, and the two elements can be communicated with each other or the two elements can interact with each other, so that the specific meaning of the terms in the invention can be understood according to specific situations by a person skilled in the art. Moreover, expressions such as "first" and "second" are used merely to distinguish one entity or operation from another entity or operation without necessarily requiring or implying any actual such relationship or order between such entities or operations. Meanwhile, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. In addition, "front", "rear", "left", "right", "upper" and "lower" in this document are referred to the placement states shown in the drawings.
Finally, it should be noted that: the above examples are only for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (7)
1. The utility model provides a wind turbine generator system's wheel hub heat abstractor, its characterized in that, wind turbine generator system's wheel hub heat abstractor includes cabin, hubcap, cabin dehumidification salt fog system, cooling system, wheel hub, temperature detecting element and pressure difference detecting element, wherein: the hub cover is arranged on one side of the engine room, the engine room dehumidifying salt-fog system is arranged in the engine room, the hub is arranged in the hub cover, the heat radiating system is arranged in the middle of the hub, and the temperature detecting element and the pressure difference detecting element are correspondingly arranged on the hub;
the engine room comprises an engine room cover, a multifunctional baffle plate and a main transmission system, wherein the multifunctional baffle plate is arranged on the outer side of the engine room cover in a surrounding mode, and the main transmission system is arranged in the middle of the engine room cover;
the cabin dehumidification salt mist system comprises an electric shutter, a salt mist filter, an axial flow fan system, a hose assembly and a control element, wherein the salt mist filter is arranged on the electric shutter, the axial flow fan system is arranged on the salt mist filter, the control element is arranged on the axial flow fan system, and the hose assembly is connected with the axial flow fan system;
the heat dissipation system comprises a first heat dissipation support, a second heat dissipation support, heat dissipation blades, an adjusting device, a heat dissipation driving device and a limiting device, wherein the first heat dissipation support and the second heat dissipation support are correspondingly arranged, the heat dissipation driving device is arranged between the first heat dissipation support and the second heat dissipation support, the heat dissipation assembly is installed on the heat dissipation driving device through the adjusting device, and the limiting device is arranged on the heat dissipation driving device.
2. The hub heat dissipation device of a wind turbine generator set according to claim 1, wherein: the hose assembly comprises a first hose and a second hose, one end of the first hose is communicated with the output end of the axial flow fan system, the other end of the first hose is connected with the second hose, and the other end of the second hose penetrates through the main transmission system and is communicated with the hubcap.
3. The hub heat dissipation device of a wind turbine generator according to claim 1, wherein the heat dissipation driving device includes a driving motor, a driving rod, and a mounting table, the driving rod is connected to an output end of the driving motor, the mounting table is welded to the driving rod uniformly, the driving rod is connected to the first heat dissipation bracket and the second heat dissipation bracket through a rotating shaft, and the driving motor is fixedly connected to the second heat dissipation bracket.
4. The hub heat dissipation device of a wind turbine generator set according to claim 3, wherein a connection platform is arranged at the tail end of the heat dissipation blade, and the connection platform is connected with the installation platform through a rotating shaft.
5. The hub heat dissipation device of the wind turbine generator set according to claim 4, wherein the adjusting device comprises an adjusting table, an adjusting pressure spring and an adjusting block, one end of the adjusting pressure spring is welded to the adjusting table, and the other end of the adjusting pressure spring is welded to the adjusting block;
the adjusting platform is connected with the mounting platform rotating shaft, and the adjusting block is connected with the outer side of the connecting platform in a sliding mode.
6. The hub heat dissipation device of a wind turbine generator set according to claim 4, wherein a tension spring is welded to one side of the driving rod, which is close to the mounting table, and the other end of the tension spring is welded to the inner side of the connecting table.
7. The hub heat dissipation device of wind turbine generator set according to claim 1, wherein a heat dissipation channel is defined between the hubcap and the hub, and a heat dissipation hole is defined between the hubcap and the multifunctional baffle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211367392.6A CN115750241B (en) | 2022-11-03 | 2022-11-03 | Hub heat abstractor of wind turbine generator system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211367392.6A CN115750241B (en) | 2022-11-03 | 2022-11-03 | Hub heat abstractor of wind turbine generator system |
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| Publication Number | Publication Date |
|---|---|
| CN115750241A true CN115750241A (en) | 2023-03-07 |
| CN115750241B CN115750241B (en) | 2024-04-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211367392.6A Active CN115750241B (en) | 2022-11-03 | 2022-11-03 | Hub heat abstractor of wind turbine generator system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117967532A (en) * | 2024-04-02 | 2024-05-03 | 国网山东省电力公司莱州市供电公司 | Heat abstractor of wind driven generator |
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|---|---|---|---|---|
| CN201714586U (en) * | 2010-07-20 | 2011-01-19 | 中船重工(重庆)海装风电设备有限公司 | Offshore wind power generation system |
| WO2012002397A1 (en) * | 2010-06-30 | 2012-01-05 | 三菱重工業株式会社 | Wind power generation apparatus |
| CN106640554A (en) * | 2016-12-12 | 2017-05-10 | 北京金风科创风电设备有限公司 | Heat dissipation system and heat dissipation method for wind generating set and wind generating set |
| WO2018024039A1 (en) * | 2016-08-05 | 2018-02-08 | 江苏金风科技有限公司 | Tower bottom cooling device for wind power generator unit, and control method |
-
2022
- 2022-11-03 CN CN202211367392.6A patent/CN115750241B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012002397A1 (en) * | 2010-06-30 | 2012-01-05 | 三菱重工業株式会社 | Wind power generation apparatus |
| CN201714586U (en) * | 2010-07-20 | 2011-01-19 | 中船重工(重庆)海装风电设备有限公司 | Offshore wind power generation system |
| WO2018024039A1 (en) * | 2016-08-05 | 2018-02-08 | 江苏金风科技有限公司 | Tower bottom cooling device for wind power generator unit, and control method |
| CN106640554A (en) * | 2016-12-12 | 2017-05-10 | 北京金风科创风电设备有限公司 | Heat dissipation system and heat dissipation method for wind generating set and wind generating set |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117967532A (en) * | 2024-04-02 | 2024-05-03 | 国网山东省电力公司莱州市供电公司 | Heat abstractor of wind driven generator |
| CN117967532B (en) * | 2024-04-02 | 2024-06-11 | 国网山东省电力公司莱州市供电公司 | Heat abstractor of wind driven generator |
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| CN115750241B (en) | 2024-04-02 |
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