Speed limiting device of wind power generation equipment

Abstract

The invention relates to the technical field of wind power generation equipment, in particular to a wind power generation equipment speed limiting device which comprises a machine room shell and a self-adaptive speed limiting mechanism, the machine room shell is composed of a front end plate, a rear end plate and a columnar bin body fixed between the front end plate and the rear end plate, and the front end plate and the rear end plate are jointly and rotationally connected with an impeller shaft; the end, extending out of the rear end plate, of the impeller shaft is fixedly connected with an impeller, three blades are evenly distributed on the periphery of the impeller, and the self-adaptive speed limiting mechanism is located in the machine room shell and comprises a driving component, a transmission assembly and a speed limiting assembly. When the impeller is applied to wind power generation equipment, friction speed limiting is carried out on the impeller shaft under the condition that the wind speed is too high, and therefore the fault occurrence rate of the wind power generation equipment caused by the too high rotating speed of the impeller is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of wind power generation equipment, and in particular to a speed limiting device for wind power generation equipment. Background Art

[0002] With the rapid economic growth and the comprehensive promotion of science and technology, energy consumption at home and abroad is on the rise, while the storage of traditional energy is constantly decreasing. Traditional fossil energy will also have an adverse impact on the natural environment during use.

[0003] In order to achieve the requirements of sustainable development, clean energy development technology has been introduced. At present, clean energy mainly refers to solar energy and wind energy. Compared with solar power generation equipment, wind power generation equipment has the advantages of flexible construction scale, short construction period and small footprint. Therefore, actively developing wind power generation technology is an important measure to improve the energy structure, reduce environmental pollution and protect ecological balance.

[0004] Since the potential energy of wind in nature is uncontrollable, specifically: wind force and wind direction are in a state of dynamic change at all times, but for wind turbines, parameters such as blade shape, size and pitch are constant. When the wind direction is constant, the speed of the impeller installed with the blades increases with the wind speed. Under extreme wind speeds in bad weather, excessive wind speeds will cause the impeller to rotate too fast and the generator to overload, endangering the safe operation of the wind turbine. Therefore, a speed limit mechanism is added to large wind turbines. The speed limit mechanism usually changes the offset angle of the windward side of the blade to reduce the speed of the impeller and the impeller shaft.

[0005] However, the speed limit mechanism of large wind turbines cannot be directly applied to small wind turbines. The reason is that small wind turbines are driven by the through wind between buildings. However, the wind force and direction of the through wind often change, and the instantaneous wind force fluctuates, resulting in a high failure rate for small wind turbines installed in parking lots and lamp poles. Summary of the invention

[0006] The present invention provides a speed limiting device for wind power generation equipment, which performs friction speed limiting on an impeller shaft when the wind speed is too high, thereby reducing the failure rate of the wind power generation equipment caused by the excessive speed of the impeller.

[0007] To achieve the above-mentioned object, the present invention provides the following technical solutions: A speed limiting device for wind power generation equipment, comprising a cabin shell and an adaptive speed limiting mechanism; The silo shell is composed of a front end plate, a rear end plate, and a columnar silo body fixed between the front end plate and the rear end plate, the front end plate and the rear end plate are connected to an impeller shaft for rotation together, the end of the impeller shaft extending out of the rear end plate is fixedly connected to an impeller, and three blades are evenly distributed on the periphery of the impeller; The adaptive speed limiting mechanism is located in the cabin shell, and the adaptive speed limiting mechanism includes a driving component, a transmission component and a speed limiting component.

[0008] Further, the driving component is a driving gear ring fixed to the outer periphery of the impeller shaft; The transmission assembly is composed of two sets, and each transmission assembly includes a first transmission shaft and a second transmission shaft, one end of the first transmission shaft is rotatably connected to a shaft seat 1 installed on the rear end plate, the axis of the first transmission shaft is parallel to the axis of the impeller shaft, the number of the first transmission shafts is two, a driven gear and a friction driving roller are fixedly mounted on the outer periphery of the first transmission shaft, the driven gear is meshed with the driving gear ring for transmission, one end of the second transmission shaft is rotatably connected to a shaft seat 2 installed on the rear end plate, the axis of the second transmission shaft is parallel to the axis of the first transmission shaft, a friction driven roller and a driving bevel gear are fixedly mounted on the outer periphery of the second transmission shaft, a torsion spring is arranged between the friction driven roller and the shaft seat 2, and the two ends of the torsion spring are respectively fixedly connected to the friction driven roller and the shaft seat 2; There are two sets of speed limiting components, each set of speed limiting components includes a stud, a threaded barrel, a speed reduction plate and a driven bevel gear. One end of the stud is rotatably connected to the shaft seat three on the inner wall of the cylindrical warehouse body, the axis of the stud and the axis of the impeller shaft are perpendicular to each other, the threaded barrel is threadedly fitted on the outside of the stud, the speed reduction plate is fixed to the end of the stud away from the cylindrical warehouse body, the speed reduction plate is an arc-shaped plate, and the speed reduction plate is located on one side of the impeller shaft; the driven bevel gear is fixedly connected to the stud, and the driven bevel gear is meshed with the driving bevel gear for transmission.

[0009] Furthermore, the friction driven roller is in intermittent contact with the friction driving roller, and the friction driving roller comprises an assembly ring and two friction driving plates symmetrically arranged on the outside of the assembly ring, the assembly ring is fixedly connected to the first transmission shaft, the friction driving plate is an arc surface structure, the friction driving plate is fixed to the outside of the assembly ring through a connecting plate, and a preset gap is provided between the two friction driving plates; under normal conditions, the impeller shaft rotates circumferentially, and the friction driving roller is intermittently in contact with the friction driven roller through the meshing transmission of the driving gear ring and the driven gear, and when the friction driving plate of the friction driving roller is in contact with the friction driven roller, the friction driving plate drives the friction driven roller by friction force When the roller rotates forward, the torsion spring is twisted and deformed. When the gap between the two friction driving plates of the friction driving roller approaches the friction driven roller, the friction driving roller separates from the friction driven roller, the torsion spring recovers its deformation, and the friction driven roller reverses and resets under the drag of the torsion spring. In the limited state, the impeller shaft rotates rapidly in the circumferential direction. When the gap between the two friction driving plates of the friction driving roller approaches the friction driven roller, the torsion spring recovers its deformation and drags the friction driven roller to reverse at an angle smaller than the forward rotation angle of the friction driven roller. The torsion spring is continuously twisted and deformed, and the friction driven roller cannot reverse to its initial position. The first transmission shaft rotates continuously, so that the driving bevel gear always rotates in the same direction.

[0010] Furthermore, a friction plate is fixedly connected to the end surface of the deceleration plate close to the impeller shaft.

[0011] Furthermore, the limiting assembly also includes a telescopic rod, one end of which is fixedly connected to the columnar warehouse body, and the other end of which is fixedly connected to the end surface of the speed reducer away from the columnar warehouse body.

[0012] Furthermore, the friction drive roller includes an assembly frame, a support arm and a friction drive assembly, wherein the support arm is a plurality of arms uniformly arranged circumferentially on the outside of the assembly frame, the friction drive assembly is a plurality of sets, each set of the friction drive assembly includes an eccentric drive block and an eccentric counterweight block located at both ends of the eccentric drive block, the cross section of the eccentric drive block includes an arc segment and an eccentric segment, the eccentric drive block is rotatably connected to the outer end of the support arm via a rotating shaft three, the rotating shaft three is located at the center of the arc segment of the eccentric drive block, and the eccentric A tension spring is arranged between the driving block and the adjacent supporting arm, and the tension spring is located on one side of the eccentric segment. A hollow hole is arranged on the eccentric driving block, and the hollow hole is located between the rotating shaft three and the arc segment. In a normal state, the arc segment of the eccentric driving block is gap-matched with the friction driven roller, and the friction driven roller does not rotate. In a limited state, the eccentric driving block and the eccentric counterweight block flip outward, the tension spring is stretched, the eccentric driving block contacts the friction driven roller, driving the friction driven roller to rotate, and the first transmission shaft and the driving bevel gear rotate.

[0013] Furthermore, the eccentric driving block and the friction driven roller are both made of flexible materials.

[0014] Furthermore, the outer surfaces of the eccentric driving block and the friction driven roller are both rough surfaces.

[0015] Furthermore, a ratchet tooth is arranged on the outer side of the eccentric segment of the eccentric driving block, and a transmission tooth matched with the ratchet tooth is arranged on the outer side of the friction driven roller, so that the eccentric driving block and the friction driven roller are matched with each other in transmission.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The wind power generation equipment speed limiting device disclosed in the present invention can limit the speed of the impeller shaft by friction when the impeller speed exceeds a preset value, thereby reducing the failure rate of the wind power generation equipment caused by excessive impeller speed. The present invention is suitable for small wind power generation equipment, such as street lamps, parking lots and other power supply environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a three-dimensional diagram of a speed limiting device for a wind power generation equipment in an embodiment; Figure 2 This is a schematic diagram of the structure inside the cabin shell in the embodiment; Figure 3 for Figure 2 The enlarged view of the area marked with number A; Figure 4 It is a schematic diagram of the structure of the torsion spring in the embodiment; Figure 5 A schematic diagram of the structure of the friction drive roller in the embodiment; Figure 6 is a schematic structural diagram of a friction drive assembly in an embodiment; Figure 7 Schematic diagram of the structure of the eccentric drive block in the embodiment.

[0018] In the figure: 11-front end plate, 12-rear end plate, 13-columnar warehouse body, 14-impeller shaft, 15-impeller, 16-blade, 21-driving gear ring, 221-first transmission shaft, 222-second transmission shaft, 223-driven gear, 2241-assembly ring, 2242-friction drive plate, 2243-connecting plate, 2244-assembly frame, 2245-support arm, 2246-eccentric drive block, 2247-eccentric counterweight block, 2248-tension spring, 2249-hollow hole, 225-friction driven roller, 226-driving bevel gear, 227-torsion spring, 231-stud, 232-threaded cylinder, 233-speed reducer, 234-driven bevel gear, 235-friction plate, 236-telescopic rod. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] See also Figure 1-5 , this embodiment provides a speed limiting device for wind power generation equipment, including a cabin shell and an adaptive speed limiting mechanism.

[0021] The silo shell is composed of a front end plate 11, a rear end plate 12 and a columnar silo body 13 fixed between the front end plate 11 and the rear end plate 12. The front end plate 11 and the rear end plate 12 are connected to an impeller shaft 14 for rotation together. The end of the impeller shaft 14 extending out of the rear end plate 12 is fixedly connected to an impeller 15, and three blades 16 are evenly distributed on the periphery of the impeller 15.

[0022] The adaptive speed limiting mechanism is located in the cabin shell, and the adaptive speed limiting mechanism includes a driving component, a transmission component and a speed limiting component.

[0023] The driving component is a driving gear ring 21 fixed on the outer periphery of the impeller shaft 14 .

[0024] There are two sets of transmission components, each of which includes a first transmission shaft 221 and a second transmission shaft 222. One end of the first transmission shaft 221 is rotatably connected to a shaft seat 1 installed on the rear end plate 12. The axis of the first transmission shaft 221 is parallel to the axis of the impeller shaft 14. There are two first transmission shafts 221. A driven gear 223 and a friction drive roller are fixedly mounted on the outer periphery of the first transmission shaft 221. The driven gear 223 is meshed with the driving gear ring 21 for transmission. One end of the second transmission shaft 222 is rotatably connected to a shaft seat 2 installed on the rear end plate 12. The axis of the second transmission shaft 222 is parallel to the axis of the first transmission shaft 221. A friction driven roller 225 and a driving bevel gear 226 are fixedly mounted on the outer periphery of the second transmission shaft 222. The friction driven roller 225 is in intermittent contact with the friction drive roller. A torsion spring 227 is arranged between the friction driven roller 225 and the shaft seat 2. The two ends of the torsion spring 227 are respectively fixedly connected to the friction driven roller 225 and the shaft seat 2.

[0025] In this embodiment, the friction drive roller includes an assembly ring 2241 and two friction drive plates 2242 symmetrically arranged on the outside of the assembly ring 2241, the assembly ring 2241 is fixedly connected to the first transmission shaft 221, the friction drive plate 2242 is a curved surface structure, the friction drive plate 2242 is fixed to the outside of the assembly ring 2241 through a connecting plate 2243, and a preset gap is set between the two friction drive plates 2242. Under normal conditions, the impeller shaft 14 rotates circumferentially, and the friction drive roller intermittently contacts the friction driven roller 225 through the meshing transmission of the driving gear ring 21 and the driven gear 223. When the friction drive plate 2242 of the friction drive roller contacts the friction driven roller 225, the friction drive plate 2242 drives the friction driven roller 225 to rotate forward by friction force, and the torque The spring 227 is twisted and deformed. When the gap between the two friction driving plates 2242 of the friction driving roller approaches the friction driven roller 225, the friction driving roller and the friction driven roller 225 are separated, and the torsion spring 227 recovers its deformation, and the friction driven roller 225 is reversed and reset under the drag of the torsion spring 227; in the limited state, the impeller shaft 14 rotates rapidly in the circumferential direction. When the gap between the two friction driving plates 2242 of the friction driving roller approaches the friction driven roller 225, the torsion spring 227 recovers its deformation and drags the friction driven roller 225 to reverse at an angle smaller than the forward rotation angle of the friction driven roller 225. The torsion spring 227 is continuously twisted and deformed, and the friction driven roller 225 cannot reverse to the initial position. The first transmission shaft 221 rotates continuously, so that the driving bevel gear 226 always rotates in the same direction.

[0026] There are two sets of speed limiting components, each set of speed limiting components includes a stud 231, a threaded barrel 232, a speed reduction plate 233 and a driven bevel gear 234. One end of the stud 231 is rotatably connected to the shaft seat three on the inner wall of the cylindrical warehouse body 13. The axis of the stud 231 and the axis of the impeller shaft 14 are perpendicular to each other. The threaded barrel 232 is threadedly fitted on the outside of the stud 231. The speed reduction plate 233 is fixed to the end of the stud 231 away from the cylindrical warehouse body 13. The speed reduction plate 233 is an arc-shaped plate, and the speed reduction plate 233 is located on one side of the impeller shaft 14; the driven bevel gear 234 is fixedly connected to the stud 231, and the driven bevel gear 234 is meshed with the driving bevel gear 226 for transmission.

[0027] As a preferred solution of this embodiment, a friction plate 235 is fixedly connected to the end surface of the deceleration plate 233 close to the impeller shaft 14 .

[0028] As a preferred solution of this embodiment, the limiting assembly also includes a telescopic rod 236, one end of which is fixedly connected to the columnar warehouse body 13, and the other end of the telescopic rod 236 is fixedly connected to the end surface of the speed reducer 233 away from the columnar warehouse body 13.

[0029] As a preferred solution of this embodiment, please refer to Figure 6and Figure 7 The friction drive roller includes an assembly frame 2244, a support arm 2245 and a friction drive assembly. The support arms 2245 are six arms circumferentially evenly arranged on the outside of the assembly frame 2244. The friction drive assembly consists of six sets, each set of friction drive assemblies includes an eccentric drive block 2246 and eccentric counterweight blocks 2247 located at both ends of the eccentric drive block 2246. The cross-section of the eccentric drive block 2246 includes an arc segment and an eccentric segment. The eccentric drive block 2246 is rotatably connected to the outer end of the support arm 2245 through a rotating shaft three. The rotating shaft three is located at the center of the arc segment of the eccentric drive block 2246. A tension spring 2248 is arranged between the eccentric drive block 2246 and the adjacent support arm 2245. The tension spring 2248 is located on one side of the eccentric segment. A hollow hole 2249 is arranged on the eccentric drive block 2246, and the hollow hole 2249 is located between the rotating shaft three and the arc segment. In this preferred embodiment, under normal conditions, the arc segment of the eccentric drive block 2246 is loosely matched with the friction driven roller 225, and the friction driven roller 225 does not rotate; under limited conditions, the eccentric drive block 2246 and the eccentric counterweight block 2247 are flipped outward, the tension spring 2248 is stretched, and the eccentric drive block 2246 contacts the friction driven roller 225, driving the friction driven roller 225 to rotate, and the first transmission shaft 221 and the driving bevel gear 226 rotate.

[0030] As a preferred solution of this embodiment, ratchet teeth are provided on the outer side of the eccentric driving block 2246 , and transmission teeth matching with the ratchet teeth are provided on the outer side of the friction driven roller 225 , so that the eccentric driving block 2246 and the friction driven roller 225 are matched in transmission.

[0031] The speed limiting device for wind power generation equipment disclosed in this embodiment has the following working principle: The wind acts on the windward side of the blade 16, driving the impeller shaft 14 and the impeller 15 to rotate. The impeller shaft 14 drives the driving gear ring 21 to rotate synchronously. The first transmission shaft 221 rotates under the meshing transmission action of the driving gear ring 21 and the driven gear 223, thereby driving the friction driving roller to rotate at high speed. The friction driving roller intermittently contacts the friction driven roller 225. Under the action of friction force, the friction driven roller 225 is driven to rotate. The front end of the torsion spring 227 is fixed to the rear side of the friction driven roller 225, and the rear end of the torsion spring 227 is fixed to the inner wall of the rear end plate 12. As the friction driven roller 225 rotates, the torsion of the torsion spring 227 increases. When the wind speed is low, the rotation speed of the impeller shaft 14 is low, and the friction driving plates 2242 on the friction driving roller 224 are arranged at intervals, so that after the friction driving roller drives the friction driven roller 225 to rotate forward by an angle, the torsion spring 227 pulls the friction driven roller 225 back to the initial position. In this state, the deceleration plate 233 of the limit assembly is in clearance with the impeller shaft 14; under extreme wind speeds, as the rotation speed of the impeller shaft 14 continues to increase, the torsion spring 227 has no time to pull the friction driven roller 225 back to the initial position, so that the friction driving roller continues to drive the friction driven roller 225 to rotate, and the first transmission shaft 221 and the driving shaft 227 are in a state of being ... The bevel gear 226 always rotates in the same direction. The second transmission shaft 222 drives the stud 231 to rotate through the meshing transmission between the driving bevel gear 226 and the driven bevel gear 234. The threaded cylinder 232 moves toward the impeller shaft 14 through the threaded transmission of the stud 231. When the friction plate 235 on the inner side of the speed reducer 233 is tightly clamped on the outer side of the impeller shaft 14, the rotation of the impeller shaft 14 is frictionally decelerated. During this process, the telescopic end of the telescopic rod 236 automatically moves with the speed reducer 233, thereby preventing the speed reducer 233 from flipping during horizontal movement.

[0032] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A speed limiting device for wind power generation equipment, characterized in that: It includes a cabin shell and an adaptive speed limiting mechanism; The silo shell is composed of a front end plate, a rear end plate, and a columnar silo body fixed between the front end plate and the rear end plate, the front end plate and the rear end plate are connected to an impeller shaft for rotation together, the end of the impeller shaft extending out of the rear end plate is fixedly connected to an impeller, and three blades are evenly distributed on the periphery of the impeller; The adaptive speed limiting mechanism is located in the cabin shell, and the adaptive speed limiting mechanism includes a driving component, a transmission component and a speed limiting component.

2. The speed limiting device for wind power generation equipment according to claim 1, characterized in that: The driving component is a driving gear ring fixed to the outer periphery of the impeller shaft; The transmission assembly is composed of two sets, and each transmission assembly includes a first transmission shaft and a second transmission shaft, one end of the first transmission shaft is rotatably connected to a shaft seat 1 installed on the rear end plate, the axis of the first transmission shaft is parallel to the axis of the impeller shaft, the number of the first transmission shafts is two, a driven gear and a friction driving roller are fixedly mounted on the outer periphery of the first transmission shaft, the driven gear is meshed with the driving gear ring for transmission, one end of the second transmission shaft is rotatably connected to a shaft seat 2 installed on the rear end plate, the axis of the second transmission shaft is parallel to the axis of the first transmission shaft, a friction driven roller and a driving bevel gear are fixedly mounted on the outer periphery of the second transmission shaft, a torsion spring is arranged between the friction driven roller and the shaft seat 2, and the two ends of the torsion spring are respectively fixedly connected to the friction driven roller and the shaft seat 2; There are two sets of speed limiting components, each set of speed limiting components includes a stud, a threaded barrel, a speed reduction plate and a driven bevel gear. One end of the stud is rotatably connected to the shaft seat three on the inner wall of the cylindrical warehouse body, the axis of the stud and the axis of the impeller shaft are perpendicular to each other, the threaded barrel is threadedly fitted on the outside of the stud, the speed reduction plate is fixed to the end of the stud away from the cylindrical warehouse body, the speed reduction plate is an arc-shaped plate, and the speed reduction plate is located on one side of the impeller shaft; the driven bevel gear is fixedly connected to the stud, and the driven bevel gear is meshed with the driving bevel gear for transmission.

3. The speed limiting device for wind power generation equipment according to claim 2, characterized in that: The friction driven roller is in intermittent contact with the friction driving roller. The friction driving roller includes an assembly ring and two friction driving plates symmetrically arranged on the outside of the assembly ring. The assembly ring is fixedly connected to the first transmission shaft. The friction driving plate is an cambered structure. The friction driving plate is fixed to the outside of the assembly ring through a connecting plate. A gap is preset between the two friction driving plates. Under normal conditions, the impeller shaft rotates circumferentially. The friction driving roller intermittently contacts the friction driven roller through the meshing transmission of the driving gear ring and the driven gear. When the friction driving plate of the friction driving roller contacts the friction driven roller, the friction driving plate drives the friction driven roller positively by relying on the friction force. The torsion spring is twisted and deformed, and when the gap between the two friction driving plates of the friction driving roller approaches the friction driven roller, the friction driving roller separates from the friction driven roller, the torsion spring recovers its deformation, and the friction driven roller reverses and resets under the drag of the torsion spring; in the limited state, the impeller shaft rotates rapidly in the circumferential direction, and when the gap between the two friction driving plates of the friction driving roller approaches the friction driven roller, the torsion spring recovers its deformation and drags the friction driven roller to reverse at an angle smaller than the forward rotation angle of the friction driven roller, the torsion spring is continuously twisted and deformed, and the friction driven roller cannot reverse to its initial position, and the first transmission shaft rotates continuously, so that the driving bevel gear always rotates in the same direction.

4. The speed limiting device for wind power generation equipment according to claim 3, characterized in that: The end surface of the deceleration plate close to the impeller shaft is fixedly connected with a friction plate.

5. The speed limiting device for wind power generation equipment according to claim 2, characterized in that: The limiting assembly also includes a telescopic rod, one end of which is fixedly connected to the columnar warehouse body, and the other end of which is fixedly connected to the end surface of the speed reducer away from the columnar warehouse body.

6. The speed limiting device for wind power generation equipment according to claim 2, characterized in that: The friction drive roller comprises an assembly frame, a support arm and a friction drive assembly, wherein the support arm is a plurality of arms uniformly arranged on the outer side of the assembly frame in the circumferential direction, the friction drive assembly is a plurality of sets, each set of the friction drive assembly comprises an eccentric drive block and an eccentric counterweight block located at both ends of the eccentric drive block, the cross section of the eccentric drive block comprises an arc segment and an eccentric segment, the eccentric drive block is rotatably connected to the outer end of the support arm through a rotating shaft three, the rotating shaft three is located at the center of the arc segment of the eccentric drive block, a tension spring is arranged between the eccentric drive block and the adjacent support arm, the tension spring is located on one side of the eccentric segment, a hollow hole is arranged on the eccentric drive block, and the hollow hole is located between the rotating shaft three and the arc segment; in a normal state, the arc segment of the eccentric drive block is gap-matched with the friction driven roller, and the friction driven roller does not rotate; in a limited state, the eccentric drive block and the eccentric counterweight block flip outward, the tension spring is stretched, the eccentric drive block contacts the friction driven roller, drives the friction driven roller to rotate, and the first transmission shaft and the driving bevel gear rotate.

7. The speed limiting device for wind power generation equipment according to claim 6, characterized in that: The eccentric driving block and the friction driven roller are both made of flexible materials.

8. The speed limiting device for wind power generation equipment according to claim 7, characterized in that: The outer surfaces of the eccentric driving block and the friction driven roller are both rough surfaces.

9. The speed limiting device for wind power generation equipment according to claim 6, characterized in that: A ratchet tooth is arranged on the outer side of the eccentric segment of the eccentric driving block, and a transmission tooth matched with the ratchet tooth is arranged on the outer side of the friction driven roller, and the eccentric driving block and the friction driven roller are matched with each other in transmission.

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