CN108131259B - Device and method for improving aerodynamic performance of large wind turbine in strong storm environment - Google Patents
Device and method for improving aerodynamic performance of large wind turbine in strong storm environment Download PDFInfo
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- CN108131259B CN108131259B CN201810098683.7A CN201810098683A CN108131259B CN 108131259 B CN108131259 B CN 108131259B CN 201810098683 A CN201810098683 A CN 201810098683A CN 108131259 B CN108131259 B CN 108131259B
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- wind turbine
- pressure
- monitoring system
- blade
- raindrop
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- 238000000034 method Methods 0.000 title claims abstract description 8
- 238000012544 monitoring process Methods 0.000 claims description 30
- 239000002344 surface layer Substances 0.000 claims description 18
- 238000007664 blowing Methods 0.000 claims description 12
- 230000003139 buffering effect Effects 0.000 claims description 11
- 230000010354 integration Effects 0.000 claims description 10
- 230000009471 action Effects 0.000 claims description 4
- 239000004698 Polyethylene Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- -1 polyethylene Polymers 0.000 claims description 3
- 229920000573 polyethylene Polymers 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 230000006872 improvement Effects 0.000 claims description 2
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 238000010521 absorption reaction Methods 0.000 claims 1
- 230000001276 controlling effect Effects 0.000 claims 1
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 7
- 230000008602 contraction Effects 0.000 description 2
- 230000001808 coupling effect Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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
- F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
-
- 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
- F03D1/00—Wind motors with rotation axis substantially parallel to the air flow entering the rotor
- F03D1/06—Rotors
- F03D1/065—Rotors characterised by their construction elements
-
- 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
- F03D13/00—Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
- F03D13/20—Arrangements for mounting or supporting wind motors; Masts or towers for wind motors
-
- 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
- F03D13/00—Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
- F03D13/20—Arrangements for mounting or supporting wind motors; Masts or towers for wind motors
- F03D13/25—Arrangements for mounting or supporting wind motors; Masts or towers for wind motors specially adapted for offshore installation
-
- 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
- F03D7/00—Controlling wind motors
- F03D7/02—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
-
- 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
- F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
- F03D80/50—Maintenance or repair
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/023—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using fluid means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01W—METEOROLOGY
- G01W1/00—Meteorology
- G01W1/02—Instruments for indicating weather conditions by measuring two or more variables, e.g. humidity, pressure, temperature, cloud cover or wind speed
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01W—METEOROLOGY
- G01W1/00—Meteorology
- G01W1/14—Rainfall or precipitation gauges
-
- 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
-
- 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
- Y02E10/727—Offshore wind turbines
-
- 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
- Y02E10/728—Onshore wind turbines
Abstract
The invention relates to a device and a method for improving aerodynamic performance of a large wind turbine in a strong storm environment. The pneumatic performance improving device is suitable for a large-scale wind turbine structure, can inhibit unfavorable pneumatic phenomena generated by rain drop impact in a strong storm environment of the large-scale wind turbine, is convenient to assemble, is suitable for various wind field working conditions, has controllable parameters, has high operation automation level, and is beneficial to normal operation of wind turbine facilities.
Description
Technical Field
The invention relates to the technical field of wind engineering, in particular to a device and a method for improving aerodynamic performance of a large-scale wind turbine in a strong storm environment.
Background
The wind turbine structure has low damping and dense vibration mode, is a typical wind sensitive structure, and currently, wind load research on the structure focuses on considering different incoming wind speeds or blade stopping positions, and related analysis for considering wind and rain combined action is rare. In practical situations, the wind turbine is mostly placed in areas with larger wind power such as suburbs and coasts, and strong storm wind is often accompanied with each other, so that extreme loads under the coupling action of two environments are formed. Therefore, a driving-off device is proposed which can effectively avoid rain drops striking the structure, and is particularly important for the structurally stable and safe operation of such facilities.
The device for improving the aerodynamic performance of the large wind turbine in the strong storm rain environment is an intelligent system which records the raindrop impact information in real time through a monitoring system and realizes the working of a blade active blowing system and a tower drum kinetic energy buffering and absorbing system through a data integration module, and is mainly used for the large wind turbine in coastal areas to reduce unfavorable rain pressure. The invention provides a pneumatic improving device capable of actively driving off rain drops to strike and adjusting the posture of the device in real time aiming at a large wind turbine.
Disclosure of Invention
The invention aims to provide the pneumatic performance improving device which is convenient to assemble, suitable for various wind field working conditions and high in operation automation level, and aims to inhibit unfavorable pneumatic phenomena caused by rain drop impact in a strong wind and storm environment of a large-scale wind turbine.
The aim of the invention can be achieved by the following technical scheme:
the invention relates to a device for improving aerodynamic performance of a large-scale wind turbine in a strong storm environment, which is characterized by mainly comprising a rainfall monitoring system, a pressure monitoring system, a blade active blowing system and a tower kinetic energy buffering and absorbing system.
The rainfall monitoring system consists of a raindrop speed sensor, a data acquisition unit and an intelligent module. The intelligent module accomplishes the raindrop impact element collection of sensor through control data acquisition unit, includes: the speed and position coordinates are used for forming a raindrop landing point distribution diagram and a raindrop speed ratio distribution diagram of the wind turbine.
The pressure monitoring system consists of a pressure sensor and a data integration module. The data integration module can pre-store wind pressure on the surface of the wind turbine in a rainless environment through the pressure sensor, collect the whole equivalent pressure data of the wind and rain pressure in a rainless environment, and output a control signal when the data pressure of the measuring point exceeds 10% of the gauge pressure of the previously stored rainless environment.
The blade active blowing system consists of a central air pump, a banner type distribution nozzle and a pneumatic valve. The central air pump can receive the instruction sent by the pressure monitoring system to generate jet air flow; the pneumatic self-closing valve is communicated under the action of internal jet air flow, and the jet air flow covers the surface of the blade through the scroll distribution nozzle so as to drive the rain drops to be separated around the blade.
The tower kinetic energy buffering and absorbing system is composed of a guide plate surface layer, a mechanical telescopic arm, a hydraulic damper and a fixing bolt, wherein the guide plate surface layer is made of a polyethylene material, the mechanical telescopic arm is used for receiving signals of the pressure monitoring system to complete expansion and contraction of the guide plate surface layer, the hydraulic damper is used for absorbing rain drop impact energy, and the fixing bolt is used for fixing the telescopic arm to be connected with the guide plate surface layer and the tower surface.
The invention also provides a method for improving the aerodynamic performance of the device in the heavy wind and heavy rain environment of the large wind turbine, which comprises the following steps:
when raindrops impact the surface of the structure, the rainfall monitoring system initiates work, utilizes the raindrop speed sensors distributed on the surface of the structure to collect discrete phase element information, integrates the raindrop speed, the pressure and the like into a data acquisition unit, and an intelligent module forms a raindrop landing distribution map and a raindrop speed ratio distribution map of the wind turbine according to the information collected by the data acquisition unit.
Meanwhile, the pressure monitoring system obtains wind and rain pressure equivalent pressure data by using a pressure sensor, once the increase amplitude is found to be more than 10% in the processing process of the data integration module, a control signal is output to a central air pump in the active blade blowing system, raindrops are blown off the blade through a banner-type distribution nozzle, and the strength of the nozzle can be regulated by a pneumatic valve.
The tower kinetic energy buffering and absorbing system is used for passively absorbing energy and is fixed on the surface of the tower through a fixing bolt. When the rain pressure exceeds the limit value, the mechanical telescopic arm lifts the surface layer and is used for isolating the rain drops from the tower, and the hydraulic damper is used for absorbing the impact energy of the rain drops.
Compared with the prior art, the invention has the beneficial effects that:
the invention is suitable for the structure of a large-scale wind turbine, has comprehensive device and controllable parameters, can effectively monitor and collect the impact speed and coordinate position of raindrops, divides the severe rain pressure area in real time through the pressure monitoring system, reduces the rain pressure distribution of the structure by utilizing the active blade blowing system and the tower drum kinetic energy buffering and absorbing system, and is beneficial to the normal operation of wind turbine facilities.
Drawings
Fig. 1: a schematic diagram of a blade active blowing system.
Fig. 2: and a rainfall monitoring system and a pressure monitoring system are shown in a schematic diagram.
Fig. 3: schematic diagram of tower kinetic energy buffering and absorbing system
In the figure: the device comprises a 1-raindrop speed sensor, a 2-data acquisition unit, a 3-intelligent module, a 4-pressure sensor, a 5-data integration module, a 6-pneumatic self-closing valve, a 7-central air pump, 8-spoke type distribution nozzles, 9-fixing bolts, a 10-guide plate surface layer, 11-mechanical telescopic arms and 12-hydraulic dampers.
Detailed Description
The invention will be further illustrated with reference to specific examples.
The front view of the device for improving the aerodynamic performance of the large-scale wind turbine in the strong storm environment is shown in figure 1, and the device comprises a rainfall monitoring system, a pressure monitoring system, a blade active blowing system and a tower kinetic energy buffering and absorbing system. The rainfall monitoring system is used for acquiring actual measurement data such as the number of raindrop landing points on the surface of the wind turbine; the pressure monitoring system is used for acquiring real-time surface pressure data of the wind turbine; the blade active blowing system is used for forming jet airflow on the surface layer of the blade so as to resist raindrops from striking the surface of the wind turbine; the tower kinetic energy buffering and absorbing system is used for absorbing rain drop impact energy on the surface of the tower; the wind turbine further comprises a braking system which is used for communicating the motor braking processing module to realize the shutdown of the wind turbine.
The rainfall monitoring system consists of a raindrop speed sensor 1, a data acquisition unit 2 and an intelligent module 3. The intelligent module 3 accomplishes the raindrop impact element collection of sensor 1 through control data acquisition unit 2, includes: the speed and position coordinates are used for forming a raindrop landing point distribution diagram and a raindrop speed ratio distribution diagram of the wind turbine.
The pressure monitoring system consists of a pressure sensor 4 and a data integration module 5. The data integration module 5 can prestore wind pressure on the surface of the wind turbine in a rainless environment through the pressure sensor 4, collect the whole equivalent pressure data of the wind and rain pressure in a rainless environment, and output a control signal when the data pressure of the measuring point exceeds the gauge pressure of the previously stored rainless environment by 10%.
The blade active blowing system consists of a central air pump 7, a banner-type distribution nozzle 8 and a pneumatic self-closing valve 6. The central air pump 7 can receive the instruction sent by the pressure monitoring system to generate jet air flow; the pneumatic self-closing valve 6 is communicated under the action of internal jet air flow, and the jet air flow covers the surface of the blade through the scroll distribution nozzle 8 so as to drive rain drops to separate around the blade.
The tower kinetic energy buffering and absorbing system is composed of a guide plate surface layer 10, a mechanical telescopic arm 11, a hydraulic damper 12 and a fixing bolt 9, wherein the guide plate surface layer 10 is made of a polyethylene material, the mechanical telescopic arm 11 is used for receiving a pressure monitoring system signal to complete expansion and contraction of the guide plate surface layer, the hydraulic damper 12 is used for absorbing rain drop impact energy, and the fixing bolt 9 is used for fixing the telescopic arm to be connected with the guide plate surface layer and the tower surface.
The present invention is not limited to the preferred embodiments, and any simple modification, equivalent replacement, and improvement made to the above embodiments by those skilled in the art without departing from the technical scope of the present invention, will fall within the scope of the present invention.
Claims (4)
1. A device that is used for pneumatic performance improvement under heavy wind storm environment of large-scale wind turbine, its characterized in that: the system comprises a rainfall monitoring system, a pressure monitoring system, a blade active blowing system and a tower kinetic energy buffering and absorbing system;
the rainfall monitoring system comprises a raindrop speed sensor, a data acquisition unit and an intelligent module, wherein the data acquisition unit is used for recording and storing raindrop impact coordinates, and the intelligent module is used for completing the acquisition of raindrop impact elements of the sensor by controlling the data acquisition unit;
the pressure monitoring system comprises a pressure sensor and a data integration module, wherein the data integration module collects wind pressure data on the surface of the wind turbine in a rainless environment and a rainy environment through the pressure sensor; the data integration module is used for storing wind pressure on the surface of the wind turbine in a rainless environment in advance through the pressure sensor and collecting the integral equivalent pressure data of wind and rain pressure in a rainy environment;
the rainfall monitoring system and the pressure monitoring system are arranged around the wind turbine blade and the tower;
the blade active blowing system comprises a central air pump, a banner type distribution nozzle and a pneumatic self-closing valve, wherein the central air pump receives an instruction sent by the pressure monitoring system to generate jet air flow, the jet air flow is arranged in a cavity of the root part of the blade, the banner type distribution nozzle is distributed at the root part, the middle part and the blade tip part of the blade and is used for communicating the central air pump to form the jet air flow on the surface layer of the blade, the pneumatic self-closing valve is used for the nozzle to resist raindrops from striking the surface of the wind turbine, the pneumatic self-closing valve is communicated under the action of the internal jet air flow, and the jet air flow covers the surface area of the blade through the banner type distribution nozzle;
the tower drum kinetic energy buffering and absorbing system comprises a guide plate surface layer, a mechanical telescopic arm, a hydraulic damper and a fixing bolt, wherein the guide plate surface layer, the mechanical telescopic arm, the hydraulic damper and the fixing bolt are arranged around the wall of the tower drum along the height and the circumferential direction and are used for absorbing rain drop impact energy on the surface of the tower drum;
the wind turbine further comprises a braking system which is used for communicating the motor braking processing module to realize the shutdown of the wind turbine.
2. The device for improving aerodynamic performance of a large wind turbine in a heavy storm environment of claim 1, wherein: the guide plate surface layer is made of a polyethylene material, the mechanical telescopic arm is used for receiving a pressure monitoring system signal to complete the expansion of the guide plate surface layer, the hydraulic damper is used for absorbing rain drop impact energy, and the fixing bolt is used for fixedly connecting the mechanical telescopic arm with the guide plate surface layer and the tower drum surface.
3. A method for improving aerodynamic performance of a large wind turbine in a strong storm environment by using the device of claim 1 or 2, characterized in that:
when raindrops impact the surface of the structure, the rainfall monitoring system initiates work, utilizes the raindrop speed sensors distributed on the surface of the structure to collect discrete phase element information, integrates the raindrop speed and the raindrop pressure into a data acquisition unit, and forms a raindrop landing distribution map and a raindrop speed ratio distribution map of the wind turbine according to the information collected by the data acquisition unit through an intelligent module;
meanwhile, the pressure monitoring system obtains wind and rain pressure equivalent pressure data by using a pressure sensor, and blows off the blade attached raindrops through a banner-type distribution nozzle by outputting a control signal to a central air pump in the blade active blowing system;
the tower kinetic energy buffer absorption system is used for passively absorbing energy and is fixed on the surface of Yu Datong through a fixing bolt; when the rain pressure exceeds the set limit value, the mechanical telescopic arm lifts the guide plate surface layer and is used for isolating rain drops from the tower, and the hydraulic damper is used for absorbing impact energy of the rain drops.
4. A method according to claim 3, characterized in that: the nozzle strength of the scroll distribution nozzle can be regulated by a pneumatic self-closing valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810098683.7A CN108131259B (en) | 2018-01-31 | 2018-01-31 | Device and method for improving aerodynamic performance of large wind turbine in strong storm environment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810098683.7A CN108131259B (en) | 2018-01-31 | 2018-01-31 | Device and method for improving aerodynamic performance of large wind turbine in strong storm environment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108131259A CN108131259A (en) | 2018-06-08 |
| CN108131259B true CN108131259B (en) | 2023-12-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810098683.7A Active CN108131259B (en) | 2018-01-31 | 2018-01-31 | Device and method for improving aerodynamic performance of large wind turbine in strong storm environment |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0826076A (en) * | 1994-07-19 | 1996-01-30 | Asmo Co Ltd | Raindroplet removing device for vehicle |
| CN205744310U (en) * | 2016-06-24 | 2016-11-30 | 北京金风科创风电设备有限公司 | Blade of wind-driven generator, blade de-icing device and wind power generating set |
| CN106438194A (en) * | 2016-10-24 | 2017-02-22 | 广州特种承压设备检测研究院 | Offshore wind turbine as well as blade damage preventing device and method |
| CN107257096A (en) * | 2017-08-16 | 2017-10-17 | 安吉智居装饰设计工程有限公司 | A kind of outdoor building engineering electric power cabinet |
| CN207905998U (en) * | 2018-01-31 | 2018-09-25 | 南京航空航天大学 | A kind of device improved for aeroperformance under large scale wind power machine high wind heavy rain environment |
-
2018
- 2018-01-31 CN CN201810098683.7A patent/CN108131259B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0826076A (en) * | 1994-07-19 | 1996-01-30 | Asmo Co Ltd | Raindroplet removing device for vehicle |
| CN205744310U (en) * | 2016-06-24 | 2016-11-30 | 北京金风科创风电设备有限公司 | Blade of wind-driven generator, blade de-icing device and wind power generating set |
| CN106438194A (en) * | 2016-10-24 | 2017-02-22 | 广州特种承压设备检测研究院 | Offshore wind turbine as well as blade damage preventing device and method |
| CN107257096A (en) * | 2017-08-16 | 2017-10-17 | 安吉智居装饰设计工程有限公司 | A kind of outdoor building engineering electric power cabinet |
| CN207905998U (en) * | 2018-01-31 | 2018-09-25 | 南京航空航天大学 | A kind of device improved for aeroperformance under large scale wind power machine high wind heavy rain environment |
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| Publication number | Publication date |
|---|---|
| CN108131259A (en) | 2018-06-08 |
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