An emergency power protection device for a wind power plant

Abstract

The application relates to the technical field of wind power generation devices, in particular to an emergency power protection device for a wind power generation device, which comprises a rack and further comprises a double-effect speed measurement braking structure connected with the rack, wherein the double-effect speed measurement braking structure comprises an angular velocity sensor, a transmission shaft, a transmission box, a first bevel gear and a second bevel gear, the second bevel gear is rotatably installed in the transmission box, the second bevel gear is coaxially fixedly connected with a belt wheel, the rack is fixedly connected with a shell, and the transmission shaft is connected with a centrifugal speed measurement firing device; a circulating lubrication structure is connected with the centrifugal speed measurement firing device; and a hollow support structure is installed in the shell. When the wind power generation device is over-speed power generation, the double-effect speed measurement braking structure, the circulating lubrication structure and the hollow support structure are cooperatively used to ensure the stable starting of the braking module of the wind power generation device, so that the wind power generation device is prevented from being excessively power generated and burned, and the emergency power protection is stably performed.

Description

Technical Field

[0001] This invention relates to the field of wind power generation equipment technology, specifically an emergency power protection device for wind power generation equipment. Background Technology

[0002] Wind energy is currently the most technologically mature and readily available renewable and clean energy source for large-scale development. Its development provides a foundation for harmonious development between humanity and nature. When wind speeds are too high, the blades of wind turbines may rotate at excessive speeds, leading to over-generation and electrical overload. Therefore, wind turbines are often designed with braking and feathering protection systems. However, the systems for main shaft braking and blade rotation adjustment require dedicated emergency power protection equipment for activation. This is typically achieved by connecting a set of angular velocity sensors to the control system. The control system activates the feathering protection system via circuitry and indirectly activates the braking system via the hydraulic system to apply friction braking to the main shaft. The control system also includes a separate active switch connected to the braking system.

[0003] As the height of wind power generation devices increases, and because these devices are often installed at high altitudes, they are more susceptible to lightning strikes. This can damage the angular velocity sensors, causing them to distort the speed measurements. Consequently, the control system cannot accurately determine the blade rotation. Furthermore, angular velocity sensors are also at risk of natural damage. Over-reliance on angular velocity sensors for speed measurement cannot guarantee the stable operation of emergency power protection equipment, thus preventing the wind power generation device from performing emergency power protection operations. Summary of the Invention

[0004] The purpose of this invention is to provide an emergency power protection device for wind power generation equipment to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] An emergency power protection device for a wind power generation unit includes a frame and further includes:

[0007] A dual-effect speed measuring and braking structure connected to a frame includes an angular velocity sensor fixedly connected to the frame, a transmission shaft fixedly connected coaxially to the measuring end of the angular velocity sensor, a transmission box fixedly connected to the frame, the transmission box being rotatably connected to the transmission shaft, a first bevel gear fixedly connected coaxially to the transmission shaft, a second bevel gear meshing with the first bevel gear, the second bevel gear being rotatably mounted inside the transmission box, a pulley fixedly connected coaxially to the second bevel gear, a housing fixedly connected to the frame, the housing being rotatably connected to the transmission shaft, and a centrifugal speed measuring trigger installed inside the housing connected to the transmission shaft.

[0008] A circulating lubrication structure connected to the centrifugal velocimetric firing device;

[0009] A hollow support structure is installed inside the housing, and the hollow support structure is slidably connected to the centrifugal velocimetric trigger. The hollow support structure is used to provide rotational support for the centrifugal velocimetric trigger.

[0010] As a further improvement of the present invention: the centrifugal speed measuring trigger includes a prism frame coaxially and fixedly connected to the drive shaft. A hexagonal sleeve is slidably installed on the prism frame. Six sets of hinge joints are installed on the hexagonal sleeve at equal angles centered on the axis of the drive shaft. Each set of hinge joints is hinged to a set of hinge plates. A connector is hinged to the end of the hinge plate away from the hinge joint. An elastic telescopic frame is fixedly connected to the connector. The elastic telescopic frame is fixedly connected to the prism frame. A counterweight is fixedly connected to the connector. The counterweight is slidably connected to the hollow support structure. Multiple sets of T-shaped bars are slidably connected to the prism frame. All sets of T-shaped bars are fixedly connected to the hexagonal sleeve. A convex wheel is fixedly connected to the convex wheel. A wheel sleeve is rotatably connected to the wheel sleeve. Multiple sets of switch control rods are fixedly connected to the housing.

[0011] As a further improvement of the present invention: the circulating lubrication structure includes a connecting shaft coaxially fixedly connected to the prism frame, a propeller coaxially fixedly connected to the connecting shaft, a support shaft coaxially fixedly connected to the propeller, a rotating support seat installed in the housing rotatably connected to the support shaft, a lower liquid inlet pipe fixedly connected to the housing and disposed below the propeller, and an upper liquid outlet pipe fixedly connected to the housing and disposed above the lower liquid inlet pipe.

[0012] As a further improvement of the present invention: the hollow support structure includes multiple sets of skeletons fixedly installed in the shell, and the multiple sets of skeletons are fixedly connected to a ring plate, and the ring plate is slidably connected to the counterweight.

[0013] As a further improvement of the present invention: the counterweight is provided with a spherical surface, and the spherical surface is slidably connected to the ring plate.

[0014] As a further improvement of the present invention: the elastic telescopic frame is fixedly connected to a tripod, and the tripod is fixedly connected to a prism frame.

[0015] As a further improvement of the present invention: a temperature sensor is fixedly installed on the top inner side of the housing, and a non-contact liquid level sensor is fixedly installed on the top inner side of the housing.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] In operation, the pulley is connected to the main shaft of the power generation equipment inside the wind turbine via an external transmission belt. The pulley drives the second bevel gear to rotate, which in turn drives the first bevel gear to rotate. The first bevel gear then drives the transmission shaft to rotate. An angular velocity sensor detects the rotational speed of the transmission shaft and transmits the measured data to the control module of the wind power generation device. When the transmission shaft speed exceeds the set range, the control module of the wind power generation device controls the device to perform active electronic braking. The transmission shaft drives the centrifugal speed sensor to move, triggering the braking operation. The centrifugal speed sensor triggers the braking control switch inside the wind power generation device, enabling the device to brake. This achieves both electronic and mechanical overspeed braking. A circulating lubrication structure provides lubrication for the centrifugal speed sensor trigger, reducing wear during rotation. A hollow support structure provides rotational support for the centrifugal speed sensor trigger. When a wind power generator is generating electricity at excessive speed, this invention uses a combination of a dual-effect speed measuring and braking structure, a circulating lubrication structure, and a hollow support structure to ensure a stable start-up of the braking module of the wind power generator, thereby preventing the wind power generator from burning out due to excessive power generation and providing stable emergency power protection. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0019] Figure 2 This is a schematic diagram of the internal three-dimensional structure of the dual-effect speed measuring and braking structure, the circulating lubrication structure, and the hollow support structure of the present invention.

[0020] Figure 3 This is a schematic diagram of the internal three-dimensional structure of the dual-effect speed measuring and braking structure, the circulating lubrication structure, and the hollow support structure of the present invention from another perspective.

[0021] Figure 4 For the present invention Figure 2 A magnified view of a portion of point A in the middle.

[0022] Figure 5 For the present invention Figure 2 A magnified view of a portion of point B in the middle.

[0023] Figure 6 This is a three-dimensional structural diagram of the prism frame and T-shaped strip of the present invention.

[0024] Figure 7 This is a schematic diagram of the structure of the transmission shaft, transmission box, first bevel gear, second bevel gear, and pulley of the present invention in cooperation with each other.

[0025] Figure 8 This is a three-dimensional structural diagram of the wheel sleeve and the switch control lever of the present invention.

[0026] In the diagram: 1. Frame; 2. Dual-effect speed measuring and braking structure; 3. Angular velocity sensor; 4. Drive shaft; 5. Transmission box; 6. First bevel gear; 7. Second bevel gear; 8. Frame; 9. Pulley; 10. Housing; 11. Centrifugal speed measuring trigger; 12. Circulating lubrication structure; 13. Hollow support structure; 14. Prism frame; 15. Hexagonal sleeve; 16. Hinge joint; 17. Hinge plate; 18. Connector; 19. Elastic telescopic frame; 20. Counterweight; 21. T-shaped strip; 22. Convex edge wheel; 23. Wheel sleeve; 24. Switch control lever; 25. Connecting shaft; 26. Propeller; 27. Support shaft; 28. Rotating support seat; 29. ​​Lower inlet pipe; 30. Upper outlet pipe; 31. Ring plate; 32. Spherical surface; 33. Tripod; 34. Temperature sensor; 35. Non-contact liquid level sensor. Detailed Implementation

[0027] The technical solution of the present invention will be further described in detail below with reference to specific embodiments.

[0028] Example 1, see Figures 1 to 8 As shown, an emergency power protection device for a wind power generation unit includes a frame 1, and further includes:

[0029] A dual-effect speed measuring and braking structure 2 connected to a frame 1 includes an angular velocity sensor 3 fixedly connected to the frame 1, a transmission shaft 4 fixedly connected coaxially to the measuring end of the angular velocity sensor 3, a transmission box 5 fixedly connected to the frame 1, the transmission box 5 being rotatably connected to the transmission shaft 4, a first bevel gear 6 fixedly connected coaxially to the transmission shaft 4, a second bevel gear 7 meshing with the first bevel gear 6, the second bevel gear 7 being rotatably installed inside the transmission box 5, a pulley 9 fixedly connected coaxially to the second bevel gear 7, a housing 10 fixedly connected to the frame 1, the housing 10 being rotatably connected to the transmission shaft 4, and a centrifugal speed measuring trigger 11 installed inside the housing 10 connected to the transmission shaft 4.

[0030] A circulating lubrication structure 12 connected to the centrifugal velocimeter igniter 11;

[0031] A hollow support structure 13 is installed inside the housing 10. The hollow support structure 13 is slidably connected to the centrifugal velocimetric trigger 11. The hollow support structure 13 is used to provide rotational support for the centrifugal velocimetric trigger 11.

[0032] In use, pulley 9 is connected to the main shaft of the power generation equipment inside the wind turbine via an external transmission belt. Pulley 9 drives the second bevel gear 7 to rotate, which in turn drives the first bevel gear 6 to rotate. The first bevel gear 6 drives the transmission shaft 4 to rotate. Angular velocity sensor 3 detects the rotational speed of the transmission shaft 4 and transmits the measured data to the control module of the wind power generation device. When the rotational speed of the transmission shaft 4 exceeds the set range, the control module of the wind power generation device controls the wind power generation device to perform active electronic braking. The transmission shaft 4 drives the centrifugal speed measuring trigger 11 to move, and the centrifugal speed measuring trigger 11 completes the braking trigger operation. The centrifugal speed measuring trigger 11 triggers the braking control switch inside the wind power generation device, enabling the wind power generation device to perform braking operations, thus completing both electronic and mechanical overspeed braking. The circulating lubrication structure 12 completes the circulating lubrication of the centrifugal speed measuring trigger 11, reducing wear during rotation. The hollow support structure 13 provides rotational support for the centrifugal speed measuring trigger 11. When a wind power generator is generating electricity at excessive speed, the present invention uses a combination of a dual-effect speed measuring and braking structure 2, a circulating lubrication structure 12, and a hollow support structure 13 to ensure stable startup of the braking module of the wind power generator, thereby preventing the wind power generator from burning out due to excessive power generation and providing stable emergency power protection.

[0033] In one embodiment, the centrifugal velocimetric firing device 11 includes a prism frame 14 coaxially and fixedly connected to the drive shaft 4. A hexagonal sleeve 15 is slidably mounted on the prism frame 14. Six sets of hinge joints 16 are mounted on the hexagonal sleeve 15 at equal angles centered on the axis of the drive shaft 4. Each set of hinge joints 16 is hinged to a set of hinge plates 17. A connector 18 is hinged to the end of the hinge plate 17 away from the hinge joint 16. An elastic telescopic frame 19 is fixedly connected to the connector 18. The elastic telescopic frame 19 is fixedly connected to the prism frame 14. The connector 18 is fixedly connected to a counterweight 20. The counterweight 20 is slidably connected to the hollow support structure 13. The prism frame 14 is slidably connected to multiple sets of T-shaped strips 21. The multiple sets of T-shaped strips 21 are all fixedly connected to the hexagonal sleeve 15. The multiple sets of T-shaped strips 21 are jointly fixedly connected to a convex wheel 22. The convex wheel 22 is rotatably connected to a wheel sleeve 23. The wheel sleeve 23 is fixedly connected to multiple sets of switch control rods 24 that are slidably connected to the housing 10. When the drive shaft 4 drives the prism frame 14 to rotate, the prism frame 14 drives the counterweight 20 to rotate in a circle through the elastic telescopic frame 19 and the connector 18. During this period, the convex wheel 22 and the wheel sleeve 23 rotate relative to each other. As the speed increases, the counterweight 20 slides along the hollow support structure 13 away from the axis of the drive shaft 4. The counterweight 20 pulls the elastic telescopic frame 19 through the connector 18. The connector 18 drives the hexagonal sleeve 15 to move through the hinge plate 17. The hexagonal sleeve 15 drives the convex wheel 22 to move through the T-shaped strip 21. The convex wheel 22 drives the wheel sleeve 23 to move, so that the wheel sleeve 23 drives the switch control rod 24 to move. The moving switch control rod 24 is used to trigger the brake control switch in the wind power generation device. The wind power generation device brakes and completes emergency power protection. When the speed decreases, the elastic telescopic frame 19 pulls the connector 18 to reset, thereby driving the entire structure to reset, which is convenient for the next trigger.

[0034] In one embodiment, the circulating lubrication structure 12 includes a connecting shaft 25 coaxially fixedly connected to the prism frame 14, a propeller 26 coaxially fixedly connected to the connecting shaft 25, a support shaft 27 coaxially fixedly connected to the propeller 26, a rotating support seat 28 rotatably connected to the support shaft 27 and installed inside the housing 10, a lower liquid inlet pipe 29 fixedly connected to the housing 10 and disposed below the propeller 26, and an upper liquid outlet pipe 30 fixedly connected to the housing 10 and disposed above the lower liquid inlet pipe 29. When the prism frame 14 rotates, it drives the connecting shaft 25 to rotate, and the connecting shaft 25 drives the propeller 26 to rotate. The rotating propeller 26 transports the lubricating oil in the housing 10 from the lower inlet pipe 29 side to the upper outlet pipe 30 side. Both the lower inlet pipe 29 and the upper outlet pipe 30 are connected to the lubricating oil storage module in the wind power generation device. The flowing lubricating oil continuously lubricates the counterweight 20 and the ring plate 31, the hexagonal sleeve 15 and the prism frame 14, and the hinge joints, reducing wear during movement and improving the operational stability and service life of the equipment.

[0035] In one embodiment, the hollow support structure 13 includes multiple sets of frames 8 fixedly installed within the housing 10. These multiple sets of frames 8 are collectively and fixedly connected to a ring plate 31, which is slidably connected to the counterweight 20. The multiple sets of frames 8 provide stable support for the ring plate 31, which in turn provides stable sliding support for the sliding counterweight 20.

[0036] In one embodiment, the counterweight 20 is provided with a spherical surface 32, which is slidably connected to the ring plate 31. The spherical surface 32 can reduce the friction force experienced by the counterweight 20 when sliding, improve the sliding sensitivity of the counterweight 20, and ensure that the device can trigger braking in time when the wind power generation device generates electricity at overspeed.

[0037] In one embodiment, the elastic telescopic frame 19 is fixedly connected to a tripod 33, which is fixedly connected to the prism frame 14. The tripod 33 can improve the installation stability of the elastic telescopic frame 19 and prevent the elastic telescopic frame 19 from bending.

[0038] Example 2, based on Example 1, see [link / reference] Figures 1-3 A temperature sensor 34 and a non-contact liquid level sensor 35 are fixedly installed on the top inner side of the housing 10. The temperature sensor 34 can detect the temperature of the lubricating oil inside the housing 10 in real time, and the non-contact liquid level sensor 35 can detect the liquid level of the lubricating oil in real time, which facilitates maintenance personnel to keep abreast of the equipment's operating status and perform maintenance.

[0039] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the invention.

Claims

1. An emergency power protection device for a wind power generation unit, comprising a frame, characterized in that, Also includes: A dual-effect speed measuring and braking structure connected to a frame includes an angular velocity sensor fixedly connected to the frame, a transmission shaft fixedly connected coaxially to the measuring end of the angular velocity sensor, a transmission box fixedly connected to the frame, the transmission box being rotatably connected to the transmission shaft, a first bevel gear fixedly connected coaxially to the transmission shaft, a second bevel gear meshing with the first bevel gear, the second bevel gear being rotatably mounted inside the transmission box, a pulley fixedly connected coaxially to the second bevel gear, a housing fixedly connected to the frame, the housing being rotatably connected to the transmission shaft, and a centrifugal speed measuring trigger installed inside the housing connected to the transmission shaft. A circulating lubrication structure connected to the centrifugal velocimetric firing device; A hollow support structure is installed inside the housing, and the hollow support structure is slidably connected to the centrifugal velocimetric trigger. The hollow support structure is used to provide rotational support for the centrifugal velocimetric trigger.

2. The emergency power protection device for a wind power generation device according to claim 1, characterized in that, The centrifugal speed-measuring trigger includes a prism frame coaxially and fixedly connected to the drive shaft. A hexagonal sleeve is slidably mounted on the prism frame. Six sets of hinge joints are installed on the hexagonal sleeve at equal angles centered on the axis of the drive shaft. Each set of hinge joints is hinged to a set of hinge plates. A connector is hinged to the end of the hinge plate away from the hinge joint. An elastic telescopic frame is fixedly connected to the connector. The elastic telescopic frame is fixedly connected to the prism frame. A counterweight is fixedly connected to the connector. The counterweight is slidably connected to the hollow support structure. Multiple sets of T-shaped bars are slidably connected to the prism frame. All sets of T-shaped bars are fixedly connected to the hexagonal sleeve. A convex wheel is fixedly connected to the convex wheel. A wheel sleeve is rotatably connected to the wheel sleeve. Multiple sets of switch control rods are fixedly connected to the housing.

3. An emergency power protection device for a wind power generation device according to claim 2, characterized in that, The circulating lubrication structure includes a connecting shaft coaxially fixedly connected to the prism frame, a propeller coaxially fixedly connected to the connecting shaft, a support shaft coaxially fixedly connected to the propeller, a rotating support seat rotatably connected to the support shaft and installed inside the housing, a lower liquid inlet pipe fixedly connected to the housing and positioned below the propeller, and an upper liquid outlet pipe fixedly connected to the housing and positioned above the lower liquid inlet pipe.

4. An emergency power protection device for a wind power generation device according to claim 2, characterized in that, The hollow support structure includes multiple sets of skeletons fixedly installed inside the shell, and the multiple sets of skeletons are fixedly connected to a ring plate, which is slidably connected to a counterweight.

5. An emergency power protection device for a wind power generation device according to claim 4, characterized in that, The counterweight has a spherical surface, which is slidably connected to the ring plate.

6. An emergency power protection device for a wind power generation device according to claim 2, characterized in that, The elastic telescopic frame is fixedly connected to a tripod, and the tripod is fixedly connected to a prism frame.

7. An emergency power protection device for a wind power generation device according to claim 1, characterized in that, A temperature sensor is fixedly installed on the top inner side of the housing, and a non-contact liquid level sensor is fixedly installed on the top inner side of the housing.

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