Rotating speed protection device of small wind turbine

Abstract

A rotating speed protection device of a small wind turbine, relating to the technical field of wind turbines. The rotating speed protection device comprises a support sleeve (1); a rotating shaft (2) is rotatably connected to the top of the support sleeve; adjusting mechanisms (3) are fixedly mounted on the outer wall of the top of the rotating shaft; a blade (4) is fixedly connected to the other end of each adjusting mechanism; a transmission gearbox (5) is fixedly connected to the bottom end of the rotating shaft; a wind power generator (6) is fixedly connected to an output end of the transmission gearbox by means of a coupling; a storage battery group (9) is arranged at the bottom of the wind power generator; the wind power generator is electrically connected to the storage battery group; and a control mechanism (7) is fixedly mounted at the top of the rotating shaft. By means of the design of a locking mechanism (8), when the wind speed is excessively high, the locking mechanism can lock the rotating shaft, so that the rotating shaft stops rotating, thereby protecting the wind power generator, preventing the self-balance of the wind power generator from being destroyed caused by an excessively high rotating speed of the rotating shaft, and preventing fire disasters caused by overpower of the wind power generator.

Description

A speed protection device for small wind power equipment Technical Field

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

[0002] Wind energy is a key source of clean energy. In recent years, with the rapid development of wind turbines, wind energy has attracted increasing attention, and wind power generation has increased annually. Many countries and regions plan to vigorously develop the wind power industry. Currently, wind turbines used in the wind power industry can be divided into two types based on the direction of their rotational axis: horizontal-axis wind turbines (HAWT) and vertical-axis wind turbines (VAWT).

[0003] Among them, vertical axis wind turbines are all small wind turbines, generally household grade. The airflow conditions they are in are often very complex, but due to cost reasons, they are usually not equipped with omnidirectional wind detection and speed limit safety devices. This will cause the gust intensity in all directions to exceed the limit, and the speed will be too fast to destroy the balance of the wind turbine output power. The wind turbine overpower will cause a fire, thereby reducing the life of the wind power generation equipment. For this reason, we propose a speed protection device for small wind power equipment. Summary of the Invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a speed protection device for small wind power equipment.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A speed protection device for small wind power equipment includes a support sleeve, the top of the support sleeve is rotatably connected to a rotating shaft, the top outer wall of the rotating shaft is fixedly installed with an adjustment mechanism, the other end of the adjustment mechanism is fixedly connected to a fan blade, the bottom end of the rotating shaft is fixedly connected to a gear transmission, the output end of the gear transmission is fixedly connected to a wind turbine generator through a coupling, a battery pack is provided at the bottom of the wind turbine generator, the wind turbine generator is electrically connected to the battery pack, a control mechanism is fixedly installed on the top of the rotating shaft, a locking mechanism is fixedly installed inside the support sleeve, the locking mechanism and the rotating shaft are mutually sleeved, and a main controller is fixedly installed on the inner wall of the support sleeve.

[0007] Preferably, an air pressure pump is fixedly installed inside the support sleeve, and the air pressure pump is electrically connected to the main controller. An air hole is opened on the outer wall of the support sleeve. The output end of the air pressure pump is fixedly connected to the first air pipe, and the other end of the first air pipe is fixedly connected to the second air pipe and the third air pipe through a three-way joint. An air-electric slip ring is fixedly installed on the top of the support sleeve, and the movable end of the air-electric slip ring is fixedly sleeved with the outer wall of the rotating shaft.

[0008] Preferably, there are four adjusting mechanisms and four fan blades, and the four adjusting mechanisms and four fan blades are arranged equidistantly along the axis of the rotating shaft.

[0009] Preferably, the adjustment mechanism includes a sleeve, one end of the sleeve is fixedly connected to the outer wall of the rotating shaft, a movable rod is slidably sleeved inside the sleeve, one end of the movable rod is fixedly connected to the fan blade, the other end of the movable rod is fixedly connected to a first piston, the first piston is slidably connected to the sleeve, a through hole is opened inside the rotating shaft, the rotating shaft is communicated with the sleeve through the through hole, and movable brackets are provided on both sides of the sleeve.

[0010] Preferably, the movable bracket includes a fixing ring, which is fixedly sleeved with the rotating shaft, the outer wall of the fixing ring is fixedly connected to a sliding rod, the outer wall of the sliding rod is sleeved with a first spring, the outer wall of the sliding rod is slidably connected to a slider, the outer wall of the slider is movably connected to a connecting rod, and the other end of the connecting rod is movably connected to the outer wall of the fan blade.

[0011] Preferably, the other end of the third air pipe is connected to the input end of the gas-electric slip ring, and the output end of the gas-electric slip ring is connected to the through hole through a rotating shaft. A second gas solenoid valve and a second safety valve are fixedly installed on the outer wall of the third air pipe, and the second gas solenoid valve and the second safety valve are both electrically connected to the main controller.

[0012] Preferably, the control mechanism includes a connecting bar, an installation groove is provided inside the connecting bar, a second spring is installed in the installation groove of the connecting bar, one end of the second spring is fixedly connected to the connecting bar, and the other end of the second spring is fixedly connected to a contact block, a contact switch is installed in the installation groove of the connecting bar, the contact switch and the contact block correspond to each other, and the contact switch is electrically connected to the main controller through a pneumatic slip ring.

[0013] Preferably, the locking mechanism includes a cover plate and an installation box, the cover plate and the installation box are fixedly connected by bolts, the installation box is fixedly connected to the inside of the support sleeve, the outer wall of the rotating shaft is fixedly connected with a convex strip, the outer walls of the rotating shaft and the convex strip are sleeved with an outer ring, the outer ring is located inside the installation box, the outer wall of the outer ring is fixedly connected with a protrusion, the interior of the installation box is fixedly installed with a mounting seat, the outer wall of the mounting seat is fixedly installed with an outer shell, both sides of the outer shell are fixedly connected with connecting pipes, the interior of the outer shell is slidably connected with a second piston, the outer wall of the second piston is fixedly connected with a convex rod, the outer wall of the convex rod is sleeved with a third spring, and the other end of the convex rod passes through and extends to the outside of the shell.

[0014] Preferably, the protrusion, mounting seat, shell, connecting tube, protruding rod, third spring and second piston are all multiple, and the multiple protrusions, mounting seat, shell, connecting tube, protruding rod, third spring and second piston are arranged equidistantly along the axis of the rotating shaft, and the multiple shells are connected in series through the connecting tube, and the protruding rod corresponds to the protrusion.

[0015] Preferably, the other end of the second air pipe is connected to the connecting pipe through a three-way joint, and the outer wall of the second air pipe is fixedly installed with a first gas solenoid valve and a first safety valve, and the first gas solenoid valve and the first safety valve are both electrically connected to the main controller.

[0016] The beneficial effects of the present invention are:

[0017] 1. In the present invention, through the design of the control mechanism, when the external wind speed is too high, the rotation speed of the rotating shaft is accelerated, and the rotating shaft drives the control mechanism to rotate. Under the action of centrifugal force, the contact block moves outward. At the same time, the second spring in the connecting strip is stretched, so that the contact block and the contact switch contact each other. When the wind speed is at a reasonable state, under the elastic force of the second spring, the contact block and the contact switch do not contact each other, thereby monitoring the rotation speed of the rotating shaft in real time.

[0018] 2. In the present invention, through the design of the regulating mechanism, the regulating mechanism can drive the fan blades to extend or contract, and can change the wind-receiving area of ​​the fan blades and the regulating mechanism, thereby adjusting the rotation speed of the rotating shaft, making the rotation speed of the rotating shaft in a reasonable state, thereby maintaining the balance of the output power of the wind turbine generator.

[0019] 3. In the present invention, through the design of the locking mechanism, when the wind speed is too high, the locking mechanism can lock the rotating shaft, thereby stopping the rotating shaft from rotating, thereby protecting the wind turbine generator, preventing the self-balance of the wind turbine generator from being destroyed due to the excessive rotation speed of the rotating shaft, and preventing the wind turbine generator from overpowering and causing a fire. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] FIG1 is a schematic structural diagram of a rotation speed protection device for a small wind power equipment according to the present invention.

[0021] FIG2 is a schematic structural diagram of a fan blade, a gear transmission, and a wind turbine generator of a speed protection device for a small-sized wind power equipment according to the present invention.

[0022] FIG3 is a schematic structural diagram of an air pressure pump, a first air pipe, and an air hole of a speed protection device for a small-sized wind power equipment according to the present invention.

[0023] FIG4 is a schematic structural diagram of a second gas pipe, a first gas solenoid valve, and a first safety valve of a speed protection device for a small-sized wind power equipment according to the present invention.

[0024] FIG5 is a schematic structural diagram of an adjusting mechanism of a rotation speed protection device for a small wind power equipment according to the present invention.

[0025] FIG6 is a schematic structural diagram of a movable bracket of a rotation speed protection device for a small wind power equipment according to the present invention.

[0026] FIG7 is a schematic structural diagram of a control mechanism of a rotation speed protection device for a small wind power equipment according to the present invention.

[0027] FIG8 is a top view of a locking mechanism of a speed protection device of a small wind power equipment according to the present invention.

[0028] FIG9 is a schematic structural diagram of a mounting box, an outer collar, and a protrusion of a speed protection device for a small-sized wind power equipment according to the present invention.

[0029] FIG10 is a schematic diagram of the partial structure of point A in FIG9 of a rotation speed protection device for a small wind power equipment according to the present invention.

[0030] FIG11 is a schematic structural diagram of an outer ring, a protrusion, and a protruding rod of a speed protection device for a small-sized wind power equipment according to the present invention; at this time, the locking mechanism is in an initial state.

[0031] FIG12 is a schematic structural diagram of an outer ring, a protrusion, and a protruding rod of a speed protection device for a small-sized wind power equipment according to the present invention; at this time, the locking mechanism is in a working state.

[0032] FIG13 is a front view of a rotation speed protection device for a small wind power equipment according to the present invention.

[0033] Reference numerals in the figure: 1, support sleeve; 2, rotating shaft; 201, convex strip;

[0034] 3. Adjustment mechanism; 301. Sleeve; 302. Movable rod; 303. First piston; 304. Through hole; 305. Movable bracket; 3051. Fixing ring; 3052. Sliding rod; 3053. First spring; 3054. Sliding block; 3055. Connecting rod;

[0035] 4. Fan blades; 5. Gear box; 6. Wind turbine generator;

[0036] 7. Control mechanism; 701. Connecting bar; 702. Mounting slot; 703. Second spring; 704. Contact block; 705. Contact switch;

[0037] 8. Locking mechanism; 801. Cover plate; 802. Mounting box; 803. Outer ring; 804. Protrusion; 805. Mounting seat; 806. Housing; 807. Connecting pipe; 808. Protruding rod; 809. Third spring; 810. Second piston;

[0038] 9. Battery pack; 10. Air pressure pump; 11. First air pipe; 12. Air hole; 13. Gas-electric slip ring; 14. Main controller; 15. Second air pipe; 16. First gas solenoid valve; 17. First safety valve; 18. Second gas solenoid valve; 19. Second safety valve; 20. Third air pipe. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0040] As shown in Figures 1 to 3:

[0041] A speed protection device for small wind power equipment includes a support sleeve 1, the top of the support sleeve 1 is rotatably connected to a rotating shaft 2, an adjustment mechanism 3 is fixedly installed on the top outer wall of the rotating shaft 2, the other end of the adjustment mechanism 3 is fixedly connected to a fan blade 4, the bottom end of the rotating shaft 2 is fixedly connected to a gear transmission 5, the output end of the gear transmission 5 is fixedly connected to a wind turbine generator 6 through a coupling, a battery pack 9 is provided at the bottom of the wind turbine generator 6, and the wind turbine generator 6 is electrically connected to the battery pack 9, a control mechanism 7 is fixedly installed on the top of the rotating shaft 2, a locking mechanism 8 is fixedly installed inside the support sleeve 1, the locking mechanism 8 and the rotating shaft 2 are mutually sleeved, and a main controller 14 is fixedly installed on the inner wall of the support sleeve 1.

[0042] As shown in Figures 1 to 4, an air pressure pump 10 is fixedly installed inside the support sleeve 1, and the air pressure pump 10 is electrically connected to the main controller 14. An air hole 12 is opened on the outer wall of the support sleeve 1. The output end of the air pressure pump 10 is fixedly connected to the first air pipe 11, and the other end of the first air pipe 11 is fixedly connected to the second air pipe 15 and the third air pipe 20 through a three-way joint. An air-electric slip ring 13 is fixedly installed on the top of the support sleeve 1, and the movable end of the air-electric slip ring 13 is fixedly sleeved with the outer wall of the rotating shaft 2.

[0043] As shown in Figures 5 and 6 , there are four adjustment mechanisms 3 and four fan blades 4, and the four adjustment mechanisms 3 and four fan blades 4 are arranged equidistantly along the axis of the rotating shaft 2. The adjustment mechanism 3 includes a sleeve 301, one end of which is fixedly connected to the outer wall of the rotating shaft 2, and a movable rod 302 is slidably sleeved inside the sleeve 301. One end of the movable rod 302 is fixedly connected to the fan blade 4, and the other end of the movable rod 302 is fixedly connected to a first piston 303, which is slidably connected to the sleeve 301. A through hole 304 is opened inside the rotating shaft 2, and the rotating shaft 2 is connected to the sleeve 301 through the through hole 304. Movable brackets 305 are provided on both sides of the sleeve 301. The movable bracket 305 includes a fixed ring 3051, which is fixedly coupled to the rotating shaft 2. A sliding rod 3052 is fixedly coupled to the outer wall of the fixed ring 3051. A first spring 3053 is coupled to the outer wall of the sliding rod 3052. A slider 3054 is slidably coupled to the outer wall of the sliding rod 3052. A connecting rod 3055 is movably coupled to the outer wall of the slider 3054. The other end of the connecting rod 3055 is movably coupled to the outer wall of the fan blade 4. The other end of the third air pipe 20 is connected to the input end of the gas-electric slip ring 13, and the output end of the gas-electric slip ring 13 is connected to the through hole 304 via the rotating shaft 2. The second gas solenoid valve 18 and the second safety valve 19 are fixedly mounted on the outer wall of the third air pipe 20. Both the second gas solenoid valve 18 and the second safety valve 19 are electrically connected to the main controller 14.

[0044] In the above technical solution, the control mechanism 7 controls the second safety valve 19 to open via the main controller 14. The gas in the first piston 303 enters the first air pipe 11 through the through hole 304 and is then discharged through the second safety valve 19 for pressure relief. Under the force of the first spring 3053, the first spring 3053 pushes the slider 3054 to move. The slider 3054 drives the blades 4 to retract via the connecting rod 3055. At this time, the wind-exposed area of ​​the blades 4 and the adjustment mechanism 3 is reduced. At this time, the speed of the rotating shaft 2 is reduced, so that the speed of the rotating shaft 2 is at a reasonable state, thereby maintaining the balance of the output power of the wind turbine generator 6.

[0045] When the external wind speed is normal, the air pressure pump 10 is started, the second safety valve 19 is closed, the second gas solenoid valve 18 is opened, and the first gas solenoid valve 16 is closed. The gas enters the through hole 304 through the first air pipe 11, the third air pipe 20, and the gas-electric slip ring 13, and enters the sleeve 301 through the through hole 304. The gas in the sleeve 301 pushes the first piston 303 to move, and the first piston 303 drives the fan blades 4 to unfold through the movable rod 302, so that the fan blades 4 return to the initial state.

[0046] As shown in Figure 7, the control mechanism 7 includes a connecting bar 701, an installation groove 702 is opened inside the connecting bar 701, and a second spring 703 is installed in the installation groove 702 of the connecting bar 701. One end of the second spring 703 is fixedly connected to the connecting bar 701, and the other end of the second spring 703 is fixedly connected to the contact block 704. The connecting bar 701 is located in the installation groove 702 and a contact switch 705 is installed. The contact switch 705 and the contact block 704 correspond to each other. The contact switch 705 is electrically connected to the main controller 14 through the pneumatic slip ring 13.

[0047] In the above technical solution, when the external wind speed is too high, the rotation speed of the rotating shaft 2 increases, and the rotating shaft 2 drives the control mechanism 7 to rotate. Under the action of centrifugal force, the contact block 704 moves outward, and at the same time, the second spring 703 in the connecting bar 701 is stretched, so that the contact block 704 and the contact switch 705 contact each other.

[0048] When the wind speed is at a reasonable state, under the elastic force of the second spring 703, the contact block 704 is not in contact with the contact switch 705.

[0049] As shown in Figures 8 to 12, the locking mechanism 8 includes a cover plate 801 and an installation box 802. The cover plate 801 and the installation box 802 are fixedly connected by bolts. The installation box 802 is fixedly connected to the inside of the support sleeve 1. The outer wall of the rotating shaft 2 is fixedly connected with the convex strip 201. The outer walls of the rotating shaft 2 and the convex strip 201 are sleeved with an outer ring 803. The outer ring 803 is located inside the installation box 802. The outer wall of the outer ring 803 is fixedly connected with a protrusion 804. The inside of the installation box 802 is fixedly installed with a mounting seat 805. The outer wall of the mounting seat 805 is fixedly installed with an outer shell 806. Both sides of the outer shell 806 are fixedly connected with connecting pipes 807. The inside of the outer shell 806 is slidably connected with a second piston 810. The outer wall of the second piston 810 is fixedly connected with a protruding rod 808. The outer wall of the protruding rod 808 is sleeved with a third spring 809. The other end of the protruding rod 808 passes through and extends to the outside of the outer shell 806. There are multiple protrusions 804, mounting bases 805, housings 806, connecting tubes 807, protruding rods 808, third springs 809, and second pistons 810. These protrusions 804, mounting bases 805, housings 806, connecting tubes 807, protruding rods 808, third springs 809, and second pistons 810 are equidistantly arranged along the axis of the rotating shaft 2. The multiple housings 806 are connected in series via the connecting tubes 807, and the protruding rods 808 correspond to the protrusions 804. The other end of the second air pipe 15 is connected to the connecting tube 807 via a three-way connector. A first gas solenoid valve 16 and a first safety valve 17 are fixedly mounted on the outer wall of the second air pipe 15. Both the first gas solenoid valve 16 and the first safety valve 17 are electrically connected to the main controller 14.

[0050] In the above technical solution, when the fan blades 4 and the adjustment mechanism 3 are retracted and the rotation speed of the rotating shaft 2 is still too high, the control mechanism 7 controls the air pressure pump 10 to start through the main controller 14, and at the same time, the second gas solenoid valve 18 is closed, the second air pipe 15 is opened, and the first safety valve 17 is closed. The gas enters the housing 806 through the first air pipe 11, the second air pipe 15, and the connecting pipe 807, and the gas in the housing 806 pushes the second piston 810 to move. The second piston 810 drives the protruding rod 808 to move outward, so that the protruding rod 808 contacts the outer ring 803. When the rotating shaft 2 drives the outer ring 803 to rotate through the convex strip 201, the outer ring 803 drives the protrusion 804 to rotate, and the protrusion 804 contacts the protruding rod 808. The protrusion 804 is blocked by the protruding rod 808, so that the rotating shaft 2 stops rotating, thereby protecting the wind turbine generator 6, preventing the self-balance of the wind turbine generator 6 from being destroyed due to the excessive rotation speed of the rotating shaft 2, and preventing the wind turbine generator 6 from overpowering and causing a fire.

[0051] When the external wind speed is normal, the first safety valve 17 is opened. Under the action of the third spring 809, the third spring 809 pushes the second piston 810 to move, and the second piston 810 drives the protruding rod 808 to retract. At this time, the protruding rod 808 does not contact the protrusion 804. The rotating shaft 2 drives the outer ring 803 and the protrusion 804 to rotate through the protruding strip 201. The protruding rod 808 does not limit the rotation of the rotating shaft 2. The rotating shaft 2 drives the wind turbine generator 6 to continue working through the gear transmission 5.

[0052] The specific usage and function of this embodiment are as follows:

[0053] When the present invention is in use, the fan blades 4 drive the rotating shaft 2 to rotate through the adjustment mechanism 3, and the rotating shaft 2 is regulated by the gear box 5 to drive the rotor in the wind turbine 6 to work, and the wind turbine 6 generates electricity and the battery pack 9 stores energy;

[0054] Please refer to Figure 2 for the above structure and process.

[0055] When the external wind speed is too high, the rotation speed of the shaft 2 increases, and the shaft 2 drives the control mechanism 7 to rotate. Under the action of centrifugal force, the contact block 704 moves outward, and at the same time, the second spring 703 in the connecting bar 701 is stretched, so that the contact block 704 and the contact switch 705 contact each other.

[0056] When the wind speed is at a reasonable level, under the elastic force of the second spring 703, the contact block 704 is not in contact with the contact switch 705;

[0057] Please refer to Figure 7 for the above structure and process.

[0058] That is, when the external wind speed is too high, the contact block 704 and the contact switch 705 contact each other, and the control mechanism 7 controls the second safety valve 19 to open through the main controller 14. The gas in the first piston 303 enters the first air pipe 11 through the through hole 304 and is then discharged through the second safety valve 19 to relieve pressure. Under the action of the first spring 3053, the first spring 3053 pushes the slider 3054 to move, and the slider 3054 drives the fan blades 4 to retract through the connecting rod 3055. At this time, the wind-exposed area of ​​the fan blades 4 and the adjustment mechanism 3 is reduced. At this time, the speed of the rotating shaft 2 is reduced, so that the speed of the rotating shaft 2 is at a reasonable state, thereby maintaining the balance of the output power of the wind turbine generator 6;

[0059] Please refer to Figures 1-7 for the above structure and process.

[0060] When the fan blades 4 and the adjustment mechanism 3 are retracted, if the rotation speed of the rotating shaft 2 is still too high, the control mechanism 7 controls the air pressure pump 10 to start through the main controller 14, and at the same time, the second gas solenoid valve 18 is closed, the second air pipe 15 is opened, and the first safety valve 17 is closed. The gas enters the housing 806 through the first air pipe 11, the second air pipe 15, and the connecting pipe 807, and the gas in the housing 806 pushes the second piston 810 to move. The second piston 810 drives the protruding rod 808 to move outward, so that the protruding rod 808 contacts the outer ring 803. When the rotating shaft 2 drives the outer ring 803 to rotate through the protruding strip 201, the outer ring 803 drives the protrusion 804 to rotate, and the protrusion 804 contacts the protruding rod 808. The protruding rod 808 blocks the protrusion 804, so that the rotating shaft 2 stops rotating, thereby protecting the wind turbine generator 6, preventing the self-balance of the wind turbine generator 6 from being destroyed due to the excessive rotation speed of the rotating shaft 2, and preventing the wind turbine generator 6 from overpowering and causing a fire.

[0061] Please refer to Figures 1-7 for the above structure and process.

[0062] When the external wind speed is normal, the first safety valve 17 opens. Under the force of the third spring 809, the third spring 809 pushes the second piston 810 to move, and the second piston 810 drives the protruding rod 808 to retract. At this time, the protruding rod 808 is no longer in contact with the protrusion 804. The rotating shaft 2 drives the outer ring 803 and the protrusion 804 to rotate through the protruding strip 201. The protruding rod 808 does not restrict the rotation of the rotating shaft 2. The rotating shaft 2 drives the wind turbine generator 6 through the gear box 5 to continue to work.

[0063] Please refer to Figures 8-12 for the above structure and process.

[0064] At the same time, the air pump 10 is started, the second safety valve 19 is closed, the second gas solenoid valve 18 is opened, and the first gas solenoid valve 16 is closed. The gas enters the through hole 304 through the first air pipe 11, the third air pipe 20, and the gas-electric slip ring 13, and then enters the sleeve 301 through the through hole 304. The gas in the sleeve 301 pushes the first piston 303 to move. The first piston 303 drives the fan blades 4 to expand through the movable rod 302, so that the fan blades 4 return to the initial state.

[0065] Please refer to Figure 1-13 for the above structure and process.

[0066] The above are only preferred specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A speed protection device for a small wind power equipment, comprising a support sleeve (1), characterized in that: The top of the support sleeve (1) is rotatably connected to a rotating shaft (2); an adjusting mechanism (3) is fixedly mounted on the top outer wall of the rotating shaft (2); the other end of the adjusting mechanism (3) is fixedly connected to a fan blade (4); the bottom end of the rotating shaft (2) is fixedly connected to a gearbox (5); the output end of the gearbox (5) is fixedly connected to a wind turbine generator (6) via a coupling; a battery pack (9) is provided at the bottom of the wind turbine generator (6); the wind turbine generator (6) is electrically connected to the battery pack (9); a control mechanism (7) is fixedly mounted on the top of the rotating shaft (2); a locking mechanism (8) is fixedly mounted inside the support sleeve (1); the locking mechanism (8) and the rotating shaft (2) are sleeved together; and a main controller (14) is fixedly mounted on the inner wall of the support sleeve (1); The adjusting mechanism (3) comprises a sleeve (301), one end of the sleeve (301) is fixedly connected to the outer wall of the rotating shaft (2), a movable rod (302) is slidably sleeved inside the sleeve (301), one end of the movable rod (302) is fixedly connected to the fan blade (4), the other end of the movable rod (302) is fixedly connected to a first piston (303), the first piston (303) is slidably connected to the sleeve (301), a through hole (304) is provided inside the rotating shaft (2), the rotating shaft (2) is communicated with the sleeve (301) through the through hole (304), and movable brackets (305) are provided on both sides of the sleeve (301); The control mechanism (7) comprises a connecting bar (701), a mounting groove (702) is provided inside the connecting bar (701), a second spring (703) is installed in the mounting groove (702) of the connecting bar (701), one end of the second spring (703) is fixedly connected to the connecting bar (701), the other end of the second spring (703) is fixedly connected to a contact block (704), the connecting bar (701) is located in the mounting groove (702) and a contact switch (705) is installed, the contact switch (705) and the contact block (704) correspond to each other, a gas-electric slip ring (13) is fixedly installed on the top of the support sleeve (1), the movable end of the gas-electric slip ring (13) is fixedly sleeved with the outer wall of the rotating shaft (2), and the contact switch (705) is electrically connected to the main controller (14) via the gas-electric slip ring (13); The locking mechanism (8) comprises a cover plate (801) and an installation box (802); the cover plate (801) and the installation box (802) are fixedly connected by bolts; the installation box (802) is fixedly connected to the inside of the support sleeve (1); the outer wall of the rotating shaft (2) is fixedly connected with a convex strip (201); the outer walls of the rotating shaft (2) and the convex strip (201) are sleeved with an outer ring (803); the outer ring (803) is located inside the installation box (802); the outer wall of the outer ring (803) is fixedly connected with a protrusion (804); A mounting seat (805) is fixedly mounted inside the mounting box (802); a housing (806) is fixedly mounted on the outer wall of the mounting seat (805); connecting pipes (807) are fixedly connected to both sides of the housing (806); a second piston (810) is slidably connected inside the housing (806); a convex rod (808) is fixedly connected to the outer wall of the second piston (810); a third spring (809) is sleeved on the outer wall of the convex rod (808); and the other end of the convex rod (808) penetrates and extends to the outside of the housing (806); An air pressure pump (10) is fixedly installed inside the support sleeve (1), the air pressure pump (10) is electrically connected to a main controller (14), an air hole (12) is provided on the outer wall of the support sleeve (1), an output end of the air pressure pump (10) is fixedly connected to a first air pipe (11), and the other end of the first air pipe (11) is fixedly connected to a second air pipe (15) and a third air pipe (20) via a three-way joint; The other end of the third air pipe (20) is connected to the input end of the gas-electric slip ring (13), and the output end of the gas-electric slip ring (13) is connected to the through hole (304) via the rotating shaft (2). A second gas solenoid valve (18) and a second safety valve (19) are fixedly mounted on the outer wall of the third air pipe (20), and the second gas solenoid valve (18) and the second safety valve (19) are both electrically connected to the main controller (14); The other end of the second gas pipe (15) is connected to the connecting pipe (807) via a three-way joint, and a first gas solenoid valve (16) and a first safety valve (17) are fixedly installed on the outer wall of the second gas pipe (15), and the first gas solenoid valve (16) and the first safety valve (17) are both electrically connected to the main controller (14).

2. A speed protection device for a small wind power equipment according to claim 1, characterized in that: There are four adjusting mechanisms (3) and four fan blades (4), and the four adjusting mechanisms (3) and four fan blades (4) are arranged equidistantly along the axis of the rotating shaft (2).

3. A speed protection device for a small wind power equipment according to claim 1, characterized in that: The movable bracket (305) comprises a fixing ring (3051), the fixing ring (3051) is fixedly sleeved with the rotating shaft (2), the outer wall of the fixing ring (3051) is fixedly connected with a sliding rod (3052), the outer wall of the sliding rod (3052) is sleeved with a first spring (3053), the outer wall of the sliding rod (3052) is slidably connected with a sliding block (3054), the outer wall of the sliding block (3054) is movably connected with a connecting rod (3055), and the other end of the connecting rod (3055) is movably connected to the outer wall of the fan blade (4).

4. A speed protection device for a small wind power equipment according to claim 2, characterized in that: The protrusion (804), the mounting seat (805), the housing (806), the connecting tube (807), the protruding rod (808), the third spring (809), and the second piston (810) are all multiple, and the multiple protrusions (804), the mounting seat (805), the housing (806), the connecting tube (807), the protruding rod (808), the third spring (809), and the second piston (810) are all arranged equidistantly along the axis of the rotating shaft (2), and the multiple housings (806) are connected in series via the connecting tube (807), and the protruding rod (808) corresponds to the protrusion (804).

Images