CN212432477U - A wind tunnel device for icing wind turbine blades - Google Patents
A wind tunnel device for icing wind turbine blades Download PDFInfo
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- CN212432477U CN212432477U CN202021516839.8U CN202021516839U CN212432477U CN 212432477 U CN212432477 U CN 212432477U CN 202021516839 U CN202021516839 U CN 202021516839U CN 212432477 U CN212432477 U CN 212432477U
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- air duct
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- icing
- supporting
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- 238000001816 cooling Methods 0.000 claims abstract description 25
- 238000002844 melting Methods 0.000 claims abstract description 21
- 230000008018 melting Effects 0.000 claims description 13
- 238000007789 sealing Methods 0.000 claims description 13
- 239000007921 spray Substances 0.000 claims description 12
- 230000001681 protective effect Effects 0.000 claims description 10
- 229910001220 stainless steel Inorganic materials 0.000 claims description 9
- 239000010935 stainless steel Substances 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 7
- 238000007493 shaping process Methods 0.000 claims description 6
- 238000012360 testing method Methods 0.000 abstract description 10
- 238000005452 bending Methods 0.000 abstract description 3
- 238000009434 installation Methods 0.000 abstract description 3
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- 238000002474 experimental method Methods 0.000 description 5
- 238000005057 refrigeration Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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Abstract
本实用新型提供一种风力发电机叶片结冰风洞装置，包括支撑平台板一、支撑平台板二、支撑柱、移动轮、方便调节的导流翅片组件、可融冰的风道管组件、定型支板、控制箱、连接波纹板、轴流风机、导气管一、冷却缓冲风箱、支撑托板、制冷机、导气管二、拐角风道管和集风斗。本实用新型支撑平台板一，支撑平台板二，连接波纹板和移动轮的设置，有利于在与结冰测试设备相连接时进行移动调节，增加安装操作的便捷性和灵活性，提高使用效率；转动调节手柄从而带动支撑螺杆进行伸缩，从而改变导流翅片网板弯折的程度，起到调整风向的作用，起到避免形成涡流的作用。
The utility model provides an icing wind tunnel device for wind turbine blades, comprising a supporting platform plate, a supporting platform plate 2, a supporting column, a moving wheel, a guide fin assembly for easy adjustment, and an ice-melting air duct pipe assembly , Shaped support plate, control box, connecting corrugated plate, axial flow fan, air duct 1, cooling buffer air box, support pallet, refrigerator, air duct 2, corner air duct pipe and air collecting bucket. The utility model supports the platform plate 1, supports the platform plate 2, and is connected with the corrugated plate and the moving wheel, which facilitates the movement adjustment when connecting with the icing test equipment, increases the convenience and flexibility of the installation operation, and improves the use efficiency. ; Rotate the adjustment handle to drive the support screw to expand and contract, thereby changing the degree of bending of the guide fin mesh plate, adjusting the wind direction, and avoiding the formation of eddy currents.
Description
Technical Field
The utility model belongs to the technical field of aerogenerator blade test auxiliary assembly, especially, relate to an icing wind-tunnel device of aerogenerator blade.
Background
The wind power generator is an electric power device which converts wind energy into mechanical work, and the mechanical work drives a rotor to rotate so as to finally output alternating current. The wind-driven generator generally comprises wind wheels, a generator (including a device), a direction regulator (empennage), a tower, a speed-limiting safety mechanism, an energy storage device and other components.
The wind driven generator has simple working principle, the wind wheel rotates under the action of wind force, the kinetic energy of the wind is converted into mechanical energy of a wind wheel shaft, and the generator rotates under the drive of the wind wheel shaft to generate electricity. In a broad sense, wind energy is also solar energy, so that the wind power generator is a heat energy utilization generator which uses solar energy as a heat source and uses the atmosphere as a working medium. However, due to low temperature and high humidity in some places, the blade is easy to freeze, the aerodynamic performance of the blade of the wind driven generator is adversely affected, and the running state of the blade under freezing needs to be tested, so that an icing wind tunnel is needed.
In addition, the Chinese patent publication No. CN106768796B provides an icing wind tunnel experimental device for a rotating wind turbine blade, belonging to the wind energy utilization experimental technology; the device comprises a blade rotating and measuring system consisting of a motor, a torque meter, a rotating shaft, a supporting beam and a fan blade model and an icing wind tunnel experiment system consisting of an airflow equal-section inflow section, an airflow inflow connecting cylinder, an experiment section, an airflow outflow connecting cylinder and an airflow conical outflow section which are coaxially arranged, wherein the icing wind tunnel experiment system is positioned on the side part of the blade rotating and measuring system, and the axial lead of the icing wind tunnel experiment system is parallel to the axial lead of the blade rotating and measuring system. However, the icing wind tunnel for testing the blade of the existing wind driven generator is inconvenient to connect with an experimental testing device, and the accumulated ice after the test is finished is inconvenient to clear.
Therefore, the invention is very necessary to provide the wind tunnel device for icing the blades of the wind driven generator.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a wind tunnel device freezes to aerogenerator blade to solve the icing wind tunnel of current aerogenerator blade test usefulness and be connected inconveniently with experiment testing arrangement, the problem of clear away is not convenient for to the long-pending ice that the test was accomplished.
A wind tunnel device for icing of blades of a wind driven generator comprises a first supporting platform plate, a second supporting platform plate, supporting columns, moving wheels, a guide fin assembly convenient to adjust, an air duct pipe assembly capable of melting ice, a shaping supporting plate, a control box, a connecting corrugated plate, an axial flow fan, a first air duct, a cooling buffer air box, a supporting plate, a refrigerator, a second air duct, a corner air duct pipe and a wind collecting hopper;
the first supporting platform plate and the second supporting platform plate are connected through the connecting corrugated plate by bolts; the supporting columns are respectively bolted at four corners of the lower surfaces of the first supporting platform plate and the second supporting platform plate; the movable wheel is connected to the lower end of the support column through a bolt; the guide fin assembly convenient to adjust is arranged in the corner air duct pipe; the wind channel pipe assembly capable of melting ice is connected to the right side of the corner wind channel pipe through bolts; the shaping support plate is transversely bolted at the lower part of the inner side of the support column;
the control box is connected to the upper part of the front surface of the support column arranged at the lower part of the second support platform plate through a bolt; the axial flow fan is connected to the right side of the upper part of the second supporting platform plate through a bolt; one end of the air duct is connected with the output end of the axial flow fan through a bolt, and the other end of the air duct is embedded at the right side position of the upper part of the cooling buffer air box; the supporting plate is connected to the lower part of the left side of the supporting column arranged on the lower part of the supporting platform plate through a bolt;
the refrigerator is connected to the upper part of the supporting splint through bolts; one end of the air duct II is connected with the air outlet end of the refrigerator through a screw, and the other end of the air duct II is embedded in the middle of the left side of the cooling buffer bellows; the corner air duct pipe is connected to the left side of the upper part of the first supporting platform plate through a bolt; the wind collecting hopper is in threaded connection between the cooling buffer bellows and the corner air duct pipe.
Preferably, the guide fin assembly convenient to adjust comprises a guide fin screen plate, guide vanes, a ball bearing, a sealing rubber sleeve, a support screw and an adjusting handle, wherein the guide vanes are respectively welded on the upper surface of the guide fin screen plate; the ball bearing is welded in the middle of the lower part of the flow guide fin screen plate; one end of the supporting screw penetrates through the sealing rubber sleeve and is embedded in the inner ring of the ball bearing, and the other end of the supporting screw is connected to the middle position of the upper part of the adjusting handle through a bolt.
Preferably, the air duct pipe assembly capable of melting ice comprises an air duct pipe body, an ice melting protective sleeve, a heating wire, a flow guide pipe, a control valve and an atomizing spray nozzle, wherein the ice melting protective sleeve is sleeved on the outer surface of the air duct pipe body; the heating wire is embedded in the ice melting protective sleeve; the honeycomb duct is embedded in the middle of the lower part of the air duct body; the control valve is in threaded connection with the lower part of the left side of the flow guide pipe; the atomizing spray nozzle is embedded in the middle of the upper part of the air duct body.
Preferably, the flow guide fin mesh plate is an arc-shaped stainless steel mesh plate.
Preferably, the sealing rubber sleeve is a rubber sleeve with internal threads; the sealing rubber sleeve is embedded in the middle of the inside of the first supporting platform plate.
Preferably, the flow guide fin mesh plate is connected to the inner part of the corner air duct pipe through screws.
Preferably, the air duct body is a stainless steel pipe with a convex middle part; and connecting flange plates are arranged at two ends of the air duct body.
Preferably, the movable wheel is a silent rubber universal wheel with a brake pad.
Preferably, the wind collecting hopper is a conical stainless steel funnel; and the cooling buffer air box is communicated with the corner air duct pipe through an air collecting hopper.
Preferably, the refrigerator is communicated with the cooling buffer bellows through a second air duct.
Preferably, the axial flow fan is communicated with the cooling buffer bellows through a first air duct.
Preferably, the refrigerator and the axial flow fan are respectively and electrically connected with the control box.
Preferably, the lower part of the atomizing spray nozzle is provided with a mechanical valve.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the first supporting platform plate and the second supporting platform plate are connected with the corrugated plates and the moving wheels, so that the moving adjustment is facilitated when the first supporting platform plate and the second supporting platform plate are connected with the icing test equipment, the convenience and flexibility of installation and operation are improved, and the use efficiency is improved;
2. the water replenishing equipment is connected to the atomizing spray nozzle, so that the effect of increasing humidity and improving icing efficiency is achieved in the process of refrigeration operation;
3. the adjusting handle is rotated to drive the supporting screw rod to stretch, so that the bending degree of the flow guide fin screen plate is changed, the wind direction is adjusted, and the vortex is prevented from being formed;
4. the refrigerating machine and the air duct II as well as the axial flow fan and the air duct I respectively perform refrigeration and form a wind tunnel, so that cold wind is ensured to flow through the cooling buffer bellows, the wind collecting hopper and the corner air duct pipe in sequence.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural view of the guide fin assembly convenient to adjust according to the present invention.
Fig. 3 is a schematic structural diagram of the duct pipe assembly capable of melting ice of the present invention.
In the figure:
1. a first supporting platform plate; 2. a second supporting platform plate; 3. a support pillar; 4. a moving wheel; 5. a guide fin assembly convenient to adjust; 51. a flow guide fin screen plate; 52. a flow deflector; 53. a ball bearing; 54. sealing the rubber sleeve; 55. a support screw; 56. an adjusting handle; 6. an air duct pipe assembly capable of melting ice; 61. an air duct body; 62. a protective sleeve for ice melting; 63. heating wires; 64. a flow guide pipe; 65. a control valve; 66. an atomizing spray nozzle; 7. shaping the support plate; 8. a control box; 9. connecting corrugated plates; 10. an axial flow fan; 11. a first gas guide pipe; 12. cooling the buffer bellows; 13. a support pallet; 14. a refrigerator; 15. a second gas guide pipe; 16. a corner duct pipe; 17. an air collecting hopper.
Detailed Description
The invention is further described below with reference to the accompanying drawings:
example (b):
as shown in the attached drawing 1, the utility model provides a wind tunnel device freezes of aerogenerator blade, including supporting platform board 1, supporting platform board two 2, support column 3 removes wheel 4, the water conservancy diversion fin subassembly 5 of convenient regulation, but the wind channel pipe assembly 6 of ice-melt, design extension board 7, control box 8 connects buckled plate 9, axial fan 10, and air duct 11, cooling buffer bellows 12, supporting plate 13, refrigerator 14, air duct two 15, turning wind channel pipe 16 and wind-collecting bucket 17.
The first supporting platform plate 1 and the second supporting platform plate 2 are connected through a connecting corrugated plate 9 by bolts; the support columns 3 are respectively bolted at four corners of the lower surfaces of the first support platform plate 1 and the second support platform plate 2; the movable wheel 4 is connected to the lower end of the support column 3 through a bolt; the guide fin assembly 5 convenient to adjust is arranged in the corner air duct pipe 16; the ice-melting air duct pipe assembly 6 is connected to the right side of the corner air duct pipe 16 through bolts;
the shaping support plate 7 is transversely bolted at the lower part of the inner side of the support column 3; the control box 8 is connected to the upper part of the front surface of the support column 3 arranged at the lower part of the second support platform plate 2 through a bolt; the axial flow fan 10 is in bolted connection with the right side position of the upper part of the second supporting platform plate 2; one end of the air duct I11 is connected with the output end of the axial flow fan 10 through a bolt, and the other end of the air duct I is embedded at the right side position of the upper part of the cooling buffer air box 12; the supporting plate 13 is in bolted connection with the lower position of the left side of the supporting column 3 arranged at the lower part of the first supporting platform plate 1;
the refrigerator 14 is bolted on the upper part of the supporting splint 13; one end of the air duct II 15 is connected with the air outlet end of the refrigerator 14 through a screw, and the other end of the air duct II is embedded in the middle of the left side of the cooling buffer bellows 12; the corner air duct pipe 16 is connected to the left side of the upper part of the first supporting platform plate 1 through a bolt; the air collecting hopper 17 is connected between the cooling buffer air box 12 and the corner air duct pipe 16 in a threaded mode.
As shown in fig. 2, in the above embodiment, specifically, the guide fin assembly 5 convenient to adjust comprises a guide fin mesh plate 51, guide vanes 52, ball bearings 53, a sealing rubber sleeve 54, a support screw 55 and an adjusting handle 56, wherein the guide vanes 52 are respectively welded on the upper surface of the guide fin mesh plate 51; the ball bearing 53 is welded in the middle of the lower part of the guide fin screen plate 51; one end of the supporting screw 55 penetrates through the sealing rubber sleeve 54 and is embedded in the inner ring of the ball bearing 53, and the other end of the supporting screw is connected to the middle position of the upper part of the adjusting handle 56 through a bolt.
As shown in fig. 3, in the above embodiment, specifically, the air duct assembly 6 capable of melting ice includes an air duct tube body 61, an ice-melting protective sleeve 62, a heating wire 63, a flow guide tube 64, a control valve 65 and an atomizing spray nozzle 66, and the ice-melting protective sleeve 62 is sleeved on the outer surface of the air duct tube body 61; the heating wire 63 is embedded in the ice-melting protective sleeve 62; the guide pipe 64 is embedded in the middle of the lower part of the air duct body 61; the control valve 65 is in threaded connection with the lower position of the left side of the draft tube 64; the atomizing spray nozzle 66 is embedded in the middle of the upper part of the air duct body 61.
In the above embodiment, specifically, the guide fin mesh plate 51 is specifically an arc-shaped stainless steel mesh plate; the sealing rubber sleeve 54 is a rubber sleeve with internal threads; the sealing rubber sleeve 54 is embedded in the middle position inside the supporting platform plate I1; the guide fin mesh plate 51 is screwed in the corner air duct pipe 16.
In the above embodiment, specifically, the air duct body 61 specifically adopts a stainless steel pipe with a convex middle part; two ends of the air duct body 61 are provided with connecting flange plates; the lower part of the atomizing spray nozzle 66 is provided with a mechanical valve.
In the above embodiment, specifically, the moving wheel 4 is a silent rubber universal wheel with a brake pad.
In the above embodiment, specifically, the air collecting hopper 17 specifically adopts a conical stainless steel funnel; the cooling buffer air box 12 is communicated with a corner air duct pipe 16 through an air collecting hopper 17; the refrigerating machine 14 is communicated with the cooling buffer bellows 12 through a second air duct 15; the axial flow fan 10 is communicated with a cooling buffer air box 12 through a first air duct 11.
In the above embodiment, specifically, the refrigerator 14 and the axial flow fan 10 are respectively electrically connected to the control box 8; the control box 8, the refrigerating machine 14 and the axial flow fan 10 are respectively common equipment in the field of industrial mechanical equipment; for example: the control box 8 is an electrical control box with the model XL-21; the refrigerator 14 is a refrigerator with model number XD-6028; the axial flow fan 10 is a fan with the model SF 2-2.
Principle of operation
When the utility model is used, the refrigerating machine 14, the air duct II 15, the axial flow fan 10 and the air duct I11 respectively perform the functions of refrigeration and wind tunnel formation, thereby ensuring that cold air flows in sequence through the cooling buffer bellows 12, the wind collecting hopper 17 and the corner air duct pipe 16; the water replenishing equipment is connected to the atomizing spray nozzle 66, so that the effect of increasing humidity and improving icing efficiency is achieved in the process of refrigerating operation; the adjusting handle 56 is rotated to drive the supporting screw 55 to stretch, so that the bending degree of the flow guide fin screen plate 51 is changed, the wind direction is adjusted, and the vortex is prevented from being formed; supporting platform board 1, supporting platform board two 2, the setting of connecting corrugated plate 9 and removal wheel 4 is favorable to removing when being connected with freezing test equipment and adjusts, increases the convenience and the flexibility of installation operation, improves the availability factor.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A wind tunnel device for blade icing of a wind driven generator is characterized by comprising a first supporting platform plate (1), a second supporting platform plate (2), supporting columns (3), moving wheels (4), a guide fin component (5) convenient to adjust, an air duct pipe component (6) capable of melting ice, a shaping supporting plate (7), a control box (8), a connecting corrugated plate (9), an axial flow fan (10), a first air duct (11), a cooling buffer air box (12), a supporting plate (13), a refrigerator (14), a second air duct (15), a corner air duct pipe (16) and an air collecting hopper (17);
the supporting platform plate I (1) and the supporting platform plate II (2) are connected through a connecting corrugated plate (9) by bolts; the supporting columns (3) are respectively bolted at four corners of the lower surfaces of the first supporting platform plate (1) and the second supporting platform plate (2); the movable wheel (4) is connected to the lower end of the support column (3) through a bolt; the guide fin assembly (5) convenient to adjust is arranged in the corner air duct pipe (16); the wind channel pipe assembly (6) capable of melting ice is connected to the right side of the corner wind channel pipe (16) through bolts;
the shaping support plate (7) is transversely bolted at the lower part of the inner side of the support column (3); the control box (8) is connected to the upper part of the front surface of the support column (3) arranged at the lower part of the second support platform plate (2) through a bolt; the axial flow fan (10) is connected to the right side of the upper part of the second supporting platform plate (2) through bolts; one end of the air duct I (11) is connected with the output end of the axial flow fan (10) through a bolt, and the other end of the air duct I is embedded at the right side position of the upper part of the cooling buffer air box (12); the supporting plate (13) is in bolted connection with the lower position of the left side of a supporting column (3) arranged at the lower part of the first supporting platform plate (1);
the refrigerator (14) is connected to the upper part of the supporting splint (13) through bolts; one end of the air duct II (15) is connected with the air outlet end of the refrigerator (14) through a screw, and the other end of the air duct II is embedded in the middle of the left side of the cooling buffer air box (12); the corner air duct pipe (16) is connected to the left side of the upper part of the first supporting platform plate (1) through bolts; the air collecting hopper (17) is in threaded connection between the cooling buffer air box (12) and the corner air duct pipe (16).
2. The wind tunnel device for icing on blades of a wind driven generator according to claim 1, wherein the guide fin component (5) convenient to adjust comprises a guide fin screen plate (51), guide vanes (52), ball bearings (53), a sealing rubber sleeve (54), a support screw rod (55) and an adjusting handle (56), wherein the guide vanes (52) are respectively welded on the upper surface of the guide fin screen plate (51); the ball bearing (53) is welded in the middle of the lower part of the guide fin screen plate (51); one end of the supporting screw rod (55) penetrates through the sealing rubber sleeve (54) and is embedded in the inner ring of the ball bearing (53), and the other end of the supporting screw rod is connected to the middle position of the upper part of the adjusting handle (56) through a bolt.
3. The wind tunnel device for icing blades of a wind driven generator according to claim 1, wherein the wind tunnel device for icing the ice-melting wind channel comprises a wind channel pipe body (61), an ice-melting protective sleeve (62), a heating wire (63), a flow guide pipe (64), a control valve (65) and an atomizing spray nozzle (66), wherein the ice-melting protective sleeve (62) is sleeved on the outer surface of the wind channel pipe body (61); the heating wire (63) is embedded in the ice melting protective sleeve (62); the guide pipe (64) is embedded in the middle of the lower part of the air duct body (61); the control valve (65) is in threaded connection with the lower position of the left side of the draft tube (64); the atomizing spray nozzle (66) is embedded in the middle of the upper part of the air duct pipe body (61).
4. The wind tunnel device for icing wind turbine blades according to claim 2, wherein the rubber sealing sleeve (54) is a rubber sleeve with internal threads; the sealing rubber sleeve (54) is embedded in the middle of the inner part of the first supporting platform plate (1).
5. The wind tunnel device for icing on blades of a wind driven generator according to claim 2, wherein the flow guide fin screen plate (51) is an arc-shaped stainless steel screen plate; the guide fin mesh plate (51) is connected to the inner part of the corner air duct pipe (16) through screws.
6. The wind tunnel device for icing blades of a wind driven generator according to claim 3, wherein the wind tunnel tube body (61) is a stainless steel tube with a convex middle part; and connecting flange plates are arranged at two ends of the air duct body (61).
7. The wind tunnel device for icing on blades of a wind driven generator according to claim 1, wherein the wind collecting hopper (17) is a conical stainless steel funnel; the cooling buffer air box (12) is communicated with the corner air duct pipe (16) through an air collecting hopper (17).
8. The wind tunnel device for icing on blades of a wind driven generator according to claim 1, wherein the refrigerating machine (14) is communicated with the cooling buffer bellows (12) through a second air duct (15); the axial flow fan (10) is communicated with the cooling buffer bellows (12) through a first air duct (11).
9. The wind tunnel device for icing on blades of a wind driven generator according to claim 1, wherein the moving wheel (4) is a silent rubber universal wheel with a brake pad.
10. The wind tunnel device for icing wind turbine blades according to claim 3, characterized in that a mechanical valve is arranged at the lower part of the atomizing spray nozzle (66).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021516839.8U CN212432477U (en) | 2020-07-28 | 2020-07-28 | A wind tunnel device for icing wind turbine blades |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021516839.8U CN212432477U (en) | 2020-07-28 | 2020-07-28 | A wind tunnel device for icing wind turbine blades |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212432477U true CN212432477U (en) | 2021-01-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021516839.8U Expired - Fee Related CN212432477U (en) | 2020-07-28 | 2020-07-28 | A wind tunnel device for icing wind turbine blades |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212432477U (en) |
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2020
- 2020-07-28 CN CN202021516839.8U patent/CN212432477U/en not_active Expired - Fee Related
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