Ocean current power generation device capable of directionally and automatically regulating speed

Abstract

The invention discloses an ocean current power generation device with a directional automatic speed regulation function. Comprising a power module facing ocean current and converting forward or reverse ocean current into power output in the same direction, and an automatic speed adjusting module adaptively adjusting the size according to the output power speed of the power module. The power generation module converts the power after speed regulation into electric energy for output; and the protection module is connected with the automatic speed regulation module and protects the power module in a self-adaptive manner according to the ocean current speed. The ocean current can be efficiently utilized, and the stability, continuity and adaptability of power generation are effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of ocean current power generation equipment, and in particular to an ocean current power generation device with directional automatic speed regulation. Background Art

[0002] With the development of the global economy and the increase in human activities, energy demand continues to rise, while environmental problems are becoming increasingly serious. Traditional fossil energy not only has limited reserves, but also produces a large amount of greenhouse gases and other pollutants during its use, exacerbating global climate change and environmental pollution. Therefore, the development and utilization of renewable energy, such as ocean current energy, has become an important way to solve the energy crisis and environmental problems. Ocean current energy is a clean and sustainable energy with huge development potential. However, the use of ocean current energy faces technical challenges, such as low energy density and low conversion efficiency.

[0003] Existing ocean current power generation technologies mainly include submarine turbine power generation equipment and floating power generation devices. Submarine turbine power generation equipment has high efficiency when the ocean current is stable, but has poor adaptability to changes in ocean current direction and flow rate, and lacks an effective automatic speed regulation mechanism, which can easily lead to equipment damage or reduced efficiency; floating power generation devices rely on the ups and downs of ocean currents or waves, so their power generation efficiency is easily affected by changes in flow rate and waves, and there is also a risk of equipment damage under high flow rates; the shortcomings of existing technologies limit the stability, efficiency and adaptability of ocean current power generation equipment.

[0004] Therefore, it is urgent to solve the above problems. Summary of the invention

[0005] Purpose of the invention: The purpose of the present invention is to provide a directional and automatic speed-regulating ocean current power generation device, which can efficiently utilize ocean currents and effectively improve the stability, sustainability and adaptability of power generation.

[0006] Technical solution: To achieve the above objectives, the present invention discloses a directional and automatic speed-regulating ocean current power generation device, comprising a power module facing the ocean current and converting positive or reverse ocean currents into power output in the same direction, an automatic speed-regulating module adaptively adjusting the size of the power output according to the speed of the power module, a power generation module converting the speed-regulated power into electrical energy output, and a protection module connected to the automatic speed-regulating module and adaptively protecting the power module according to the ocean current speed.

[0007] Optionally, the power module includes a left turbine, a left turbine coupling coaxially arranged with the left turbine, a one-way bearing passed through the left turbine coupling, a left synchronous pulley fixed on the left turbine coupling shaft, a right turbine, a right turbine coupling coaxially arranged with the right turbine, a sleeve passed through the right turbine coupling shaft, a right synchronous pulley fixed on the right synchronous pulley coupling shaft, a synchronous belt wound around the left synchronous pulley and the right synchronous pulley, a horizontal bevel gear fixed on the left turbine coupling shaft, a vertical bevel gear meshing with the horizontal bevel gear, and a transmission shaft coaxially arranged with the vertical bevel gear and used to output power, wherein one end of the sleeve is provided with a bearing hole, and the other end is connected and fixed to a flange, a ratchet is fixed on the outer surface of the bearing hole, a bearing is provided in the bearing hole, the bearing is passed through the right synchronous pulley coupling shaft, and a ratchet meshing with the ratchet is passed through the right synchronous pulley coupling shaft.

[0008] Optionally, the left turbine and the right turbine are two turbines with blades rotating in opposite directions.

[0009] Optionally, the left turbine coupling is arranged in parallel with the right turbine coupling.

[0010] Optionally, the automatic speed control module includes a flange bearing seat connected to the power module, a coupling connected to the power module, a centrifugal mechanism connected to the coupling, a frustum driven by the centrifugal mechanism, a bevel shaft coaxially arranged with the frustum, a bevel gear fixed on the bevel shaft, and an upper horizontal bevel gear meshing with the bevel gear, wherein the central axis of the upper horizontal bevel gear outputs power to the power generation module.

[0011] Optionally, the centrifugal mechanism includes a base with an extending shaft, a slider mounted on the extending shaft, a pull column whose lower end is hinged to the base and whose upper end is connected to the slider via a connecting rod, a disc connected to the upper surface of the slider via a connecting shaft, and a spring mounted on the extending shaft, wherein the spring is fixed to the uppermost end of the extending shaft of the base and is used to reset the slider.

[0012] Optionally, the disc fits with a truncated cone, the truncated cone is an inverted trapezoid, and the generatrix of the truncated cone is perpendicular to the ground.

[0013] Optionally, the protection module includes a push column connected to the disc through a disc bearing and does not rotate with the disc, a rotating connecting rod whose one end is connected to the upper end of the push column through a fixed connecting rod, a flange connecting plate located on both sides of the middle of the rotating connecting rod and fixed by a flange connecting shaft, a protection box rod connected to the other end of the rotating connecting rod through a fixed connecting rod, a box rod slot mounted on the protection box rod and connected to the shell, a protection box located at the lower end of the protection box rod and used to block ocean currents, and a buckle located on the protection box and movable up and down along the shell slot.

[0014] Optionally, the lower end of the oblique shaft is connected to the shell through a lower fixing block, and the upper end of the oblique shaft is connected to the shell through an upper fixing block.

[0015] Optionally, the power generation module includes a pinion shaft fixed to the automatic speed control module, a pinion fixed on the pinion shaft, a large gear meshing with the pinion gear, a large gear shaft coaxially set with the large gear, a large gear shaft bevel gear fixed on the large gear shaft, a lower bevel gear meshing with the large gear shaft bevel gear, a lower bevel gear shaft fixed to the lower bevel gear, a magnet connecting disk fixed on the lower bevel gear shaft, magnets located on both sides of the magnet connecting disk, a coil fixing platform fixed to the lower bevel gear shaft through a bearing seat and does not rotate with the lower bevel gear shaft, and a plurality of coils located on the coil fixing platform. When the lower bevel gear shaft rotates to drive the magnet connecting disk to rotate, the magnet rotates, and the coil cuts the magnetic lines of induction to generate electricity.

[0016] Beneficial effects: Compared with the prior art, the present invention has the following significant advantages: the power module of the present invention can quickly adapt to changes in the direction of the ocean current through the configuration of a dual turbine, a one-way bearing and a ratchet pawl, thereby effectively improving the stability and sustainability of power generation; the centrifugal mechanism of the automatic speed regulation module of the present invention can automatically adjust the output at different flow rates, and the intelligent adjustment method not only improves the energy utilization rate, but also reduces the mechanical wear caused by uneven flow rate, thereby reducing maintenance costs; the protection module of the present invention can quickly activate the protection mechanism when the ocean current speed is too fast, effectively preventing the equipment from being damaged; the self-protection mechanism greatly improves the reliability of the equipment, reduces operational risks, and ensures the long-term stable operation of the power generation device; the present invention reduces dependence on fossil fuels and reduces greenhouse gas emissions by efficiently utilizing ocean current energy; the modular design of the present invention makes the maintenance and replacement of each module easier. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the present invention;

[0018] Figure 2 It is a structural schematic diagram of the power module in the present invention;

[0019] Figure 3 It is a schematic diagram of the structure of the power module sleeve bearing in the present invention;

[0020] Figure 4 It is a structural schematic diagram of the automatic speed regulation module in the present invention;

[0021] Figure 5 It is a structural schematic diagram of the power generation module in the present invention;

[0022] Figure 6 It is a structural schematic diagram of the protection module in the present invention.

[0023] In the figure: power module 100, left turbine 101, one-way bearing 102, left turbine coupling 103, left synchronous pulley 104, horizontal bevel gear 105, vertical bevel gear 106, transmission shaft 107, right turbine 108, right turbine coupling 109, flange 110, sleeve 111, bearing 112, pawl 113, ratchet 114, right synchronous pulley 115, synchronous belt 116, right synchronous pulley coupling 117;

[0024] Automatic speed regulating module 200, flange bearing seat 201, coupling 202, base 203, pull column 204, connecting rod 205, connecting shaft 206, disc 207, slider 208, spring 209, disc bearing 210, lower fixing block 211, round table 212, bevel gear 213, upper horizontal bevel gear 214, bevel shaft 215, upper fixing block 216;

[0025] Power generation module 300, pinion 301, pinion shaft 302, large gear shaft 303, large gear 304, large gear shaft bevel gear 305, lower bevel gear 306, lower bevel gear shaft 307, coil 308, magnet connection plate 309, magnet 310, coil fixing platform 311;

[0026] Protection module 400 , push column 401 , fixed connecting rod 402 , flange connection plate 403 , flange connection shaft 404 , rotating connecting rod 405 , protection box rod 406 , box rod slot 407 , buckle 408 , protection box 409 . DETAILED DESCRIPTION

[0027] The technical solution of the present invention is further described below in conjunction with the accompanying drawings.

[0028] like Figure 1 As shown, the present invention is a directional automatic speed regulating ocean current power generation device, comprising a power module 100, an automatic speed regulating module 200, a power generation module 300 and a protection module 400. The power module 100 faces the ocean current and converts the positive or reverse ocean current into power output in the same direction. The automatic speed regulating module 200 adaptively adjusts the size according to the power output speed of the power module, the power generation module 300 converts the speed-regulated power into electrical energy output, and the protection module 400 is connected to the automatic speed regulating module 200 and adaptively protects the power module 100 according to the ocean current speed.

[0029] like Figure 2 and Figure 3As shown, the power module 100 includes a left turbine 101, a one-way bearing 102, a left turbine shaft 103, a left synchronous pulley 104, a horizontal bevel gear 105, a vertical bevel gear 106, a transmission shaft 107, a right turbine 108, a right turbine shaft 109, a flange 110, a sleeve 111, a bearing 112, a pawl 113, a ratchet 114, a right synchronous pulley 115, a synchronous belt 116, and a right synchronous pulley shaft 117. The left turbine 101 and the right turbine 108 are turbines with two blades rotating in opposite directions. The sleeve 111 is a cylinder with a bearing hole at one end and four holes at the other end, and the rest is solid. When the ocean current flows through the front of the left turbine 101, the left turbine 101 rotates clockwise, and the left turbine shaft 103 connected to the left turbine 101 also rotates clockwise. The one-way bearing 102 is connected to the left turbine shaft 103 and ensures that power can only be transmitted in one direction to avoid reverse rotation. Since the blades of the right turbine 108 rotate in the opposite direction to the left turbine 101, the right turbine 108 rotates counterclockwise, thereby causing the right turbine shaft 109 connected to the right turbine 108 to rotate counterclockwise. The flange 110 is fixed on the right turbine shaft 109 and fixed to the four holes of the sleeve 111 by screws. When the right turbine shaft 109 rotates counterclockwise, the flange 110 connected to the right turbine shaft 109 also rotates counterclockwise, thereby causing the sleeve 111 connected to the flange 110 to rotate counterclockwise. Since the ratchet 113 is fixed on the sleeve 111, the ratchet 113 rotates with the counterclockwise rotation of the sleeve 111. The left turbine shaft 103 is connected to the left synchronous pulley 104, so that the clockwise rotating left turbine shaft 103 drives the left synchronous pulley 104 to rotate clockwise. The left synchronous pulley 104 drives the right synchronous pulley 115 to rotate through the synchronous belt 116, so that the right synchronous pulley shaft 117 connected to the right synchronous pulley 115 rotates clockwise, and then the ratchet 114 fixed on the right synchronous pulley shaft 117 rotates clockwise. The bearing 112 is fixed in the bearing hole of the sleeve 111 and connected to the right synchronous pulley shaft 117. The counterclockwise rotation of the sleeve 111 will cause the outer ring of the bearing 112 to rotate counterclockwise, while the inner ring connected to the right synchronous pulley shaft 117 will rotate clockwise, and the two will not interfere with each other. At this time, the ratchet 114 and the pawl 113 slide relative to each other and will not have any impact. At the same time, the rotation of the left synchronous pulley 104 drives the horizontal bevel gear 105 to rotate clockwise, and the horizontal bevel gear 105 transmits power to the transmission shaft 107 connected to the vertical bevel gear 106 through meshing with the vertical bevel gear 106. The transmission shaft 107 is fixed in the bearing seat, and further transmits power to the automatic speed control module 200. When the ocean current flows through the reverse side of the left turbine 101, the one-way bearing 102 prevents the left turbine 101 from rotating in the reverse direction, while the right turbine 108 rotates clockwise due to the direction of the ocean current, and the right turbine coupling shaft 109 connected to the right turbine 108 also rotates clockwise, causing the sleeve 111 to rotate clockwise as well.At this time, the pawl 113 on the sleeve 111 is meshed with the ratchet 114, ensuring that the ratchet 114 rotates clockwise, thereby driving the right synchronous pulley shaft 117 connected thereto to rotate clockwise, thereby causing the right synchronous pulley 115 to rotate clockwise. The left synchronous pulley 104 rotates clockwise through the action of the synchronous belt 116. This design ensures that the speed direction transmitted to the automatic speed control module 200 always remains in one direction regardless of whether the ocean current is forward or reverse.

[0030] like Figure 4As shown, the automatic speed regulating module 200 includes a flange bearing seat 201, a coupling 202, a base 203, a pull column 204, a connecting rod 205, a connecting shaft 206, a disc 207, a slider 208, a spring 209, a disc bearing 210, a lower fixing block 211, a round table 212, a bevel gear 213, an upper horizontal bevel gear 214, a bevel shaft 215 and an upper fixing block 216. The flange bearing seat 201 is connected to the transmission shaft 107 in the power module, and the transmission shaft 107 extends out of the flange part and is connected and fixed to the lower end of the coupling 202. The upper end of the coupling 202 is connected and fixed to the circular shaft at the lower end of the base 203 of the centrifugal mechanism. The centrifugal mechanism includes a base 203 with an extended shaft, a pull column 204, a connecting rod 205, a connecting shaft 206, a disc 207, a slider 208 and a spring 209. The slider 208 is sleeved on the extended shaft of the base 203, the bottom of the pull column 204 is fixed in the open groove of the base 203 through the intermediate shaft, and the upper part of the pull column 204 is fixed to the upper ends of the two connecting rods 205 respectively through bolts. Each connecting rod is connected and fixed to the extended part of the surface of the slider 208. The upper surface of the slider has three connecting shafts 206 connected to the disc 207, and the disc 207 has a bearing hole in the middle, and the disc bearing 210 is installed in the bearing hole. The spring 209 is fixed to the uppermost end of the extended shaft of the base 203, which is used to reset the slider 208. The lower fixed block 211 and the upper fixed block 216 are used to fix the round table 212 and the inclined shaft 215. The round table 212 is inverted and fits the disc 207, and the generatrix of the round table 212 is perpendicular to the ground. An inclined shaft 215 runs through the middle of the round table 212, and the inclined shaft 215 rotates with the round table 212. The upper end of the inclined shaft 215 is fixed with a bevel gear 213, and the other upper horizontal bevel gear 214 is fixed with another central shaft and meshed with the bevel gear 213, so that the power is effectively transmitted to the power generation module. When the power module transmits power upward, the centrifugal mechanism starts to rotate, and the disc 207 also rotates, and the truncated table 212 that fits with it starts to rotate, so that the meshed bevel gear 213 and the upper horizontal bevel gear 214 rotate, and the power is transmitted to the power generation module. When the speed is slow, the disc 207 rotates in contact with the bottom of the truncated table 212. Because the bottom radius of the truncated table 212 is small, a large angular velocity can be obtained, which plays a role in amplifying the speed. When the speed gradually increases, the centrifugal force causes the pull column 204 to pull outward, and the connecting rod 205 drives the slider 208 to move upward. At this time, the disc 207 fits upward along the generatrix of the truncated table 212. Since the radius of the upper part of the truncated table 212 is large, the angular velocity obtained is relatively small, which achieves the reduction of the speed and ensures that the speed transmitted to the power generation module is suitable. The slider 208 compresses the spring 209 during the upward movement. After the speed gradually decreases, the spring 209 recovers its original length and pushes the slider 208 back to the initial position, thus completing the automatic reset.

[0031] like Figure 5As shown, the power generation module 300 includes a pinion 301, a pinion shaft 302, a large gear shaft 303, a large gear 304, a large gear shaft bevel gear 305, a lower bevel gear 306, a lower bevel gear shaft 307, a coil 308, a magnet connection plate 309, a magnet 310 and a coil fixing platform 311. The pinion shaft 302 is fixed to the upper horizontal bevel gear 214 in the automatic speed regulating module 200. The rotation of the upper horizontal bevel gear 214 will drive the pinion shaft 302 to rotate, thereby transmitting the power of the automatic speed regulating module 200 to the power generation module 300. The pinion 301 is fixed on the pinion shaft 302, and the rotation of the pinion shaft 302 will drive the pinion 301 to rotate. The rotation of the pinion 301 transmits power to the large gear 304 meshing therewith, and the large gear 304 is fixed to the large gear shaft 303, and the rotation of the large gear 304 drives the large gear shaft 303 to rotate. Since the large gear shaft bevel gear 305 is fixed on the large gear shaft 303, the large gear shaft 303 will drive the large gear shaft bevel gear 305 to rotate together, and the large gear shaft bevel gear 305 is meshed with the lower bevel gear 306, so that the lower bevel gear 306 rotates. The lower bevel gear 306 is fixed to the lower bevel gear shaft 307, and the rotation of the lower bevel gear 306 will rotate the lower bevel gear shaft 307. The flange is fixed together with the magnet connection plate 309 and fixed on the lower bevel gear shaft 307. The two sides of the magnet connection plate 309 are connected to the magnet 310 by bolts and nuts to ensure that the magnet 310 is fixed on both sides of the magnet connection plate 309. There are four coils 308, which are fixed on the coil fixing platform 311. The coil fixing platform 311 is fixed to the lower bevel gear shaft 307 through a bearing seat to ensure that it does not rotate with the lower bevel gear shaft 307, but remains stationary. When the lower bevel gear shaft 307 rotates and drives the magnet connecting plate 309 to rotate, the magnet 310 rotates, and the coil cuts the magnetic flux lines to generate electricity.

[0032] like Figure 6As shown, the protection module 400 includes a push column 401, a fixed connecting rod 402, a flange connection plate 403, a flange connection shaft 404, a rotating connecting rod 405, a protection box rod 406, a box rod slot 407, a buckle 408 and a protection box 409. The push column 401 is fixed in the disc bearing 210 on the disc 207 in the automatic speed regulation module 200 to ensure that the push column 401 does not rotate with the rotation of the disc 207. There are four fixed connecting rods 402, two at each end. The upper part is fixed to one end of the rotating connecting rod 405 by bolts, and the lower part is fixed to the push column 401 by bolts. The upper part of the other end of the rotating connecting rod 405 is also connected by two fixed connecting rods 402 by bolts, and the lower parts of the two fixed connecting rods are connected to the protection box rod 406 by bolts. The middle of the rotating connecting rod 405 is connected to two flange connection plates 403, one on each side, and fixed to the flange connection shaft 404. The function of the rotating connecting rod 405 is to convert the linear motion of the push column 401 into a rotating motion, and by cooperating with the fixed connecting rod 402, ensure that the rotating connecting rod 405 can gradually rotate during the rising process of the push column 401. When the push column 401 rises, the rotating connecting rod 405 rotates counterclockwise, thereby driving the protection box rod 406 to move downward. The protection box 409 is inserted into the slot on the right baffle through the buckle 408, and the protection box rod 406 is inserted into the box rod slot 407 extending from the right baffle to control the up and down movement of the protection box. As the speed of the ocean current increases, the push column 401 gradually rises, and the rotating connecting rod 405 drives the protection box 409 to gradually descend. Finally, when the protection box 409 moves down to a certain position, the protection box 409 will block the turbine and block the ocean current, thereby stopping the rotation of the turbine, thereby achieving the purpose of protecting the turbine. When the speed gradually decreases, the push column 401 gradually descends, and the protection box 409 rises, restoring the normal operation of the turbine, thereby playing a role in protecting the turbine.

Claims

1. A directional and automatic speed regulating ocean current power generation device, characterized in that: The invention comprises a power module (100) which faces the ocean current and converts the positive or reverse ocean current into power output in the same direction, an automatic speed regulating module (200) which adaptively adjusts the size of the power output of the power module according to the speed, a power generation module (300) which converts the power after speed regulation into electric energy output, and a protection module (400) which is connected to the automatic speed regulating module (200) and adaptively protects the power module (100) according to the speed of the ocean current.

2. The directional and automatic speed regulating ocean current power generation device according to claim 1 is characterized in that: The power module (100) comprises a left turbine (101), a left turbine shaft (103) coaxially arranged with the left turbine, a one-way bearing (102) passing through the left turbine shaft, a left synchronous pulley (104) fixed on the left turbine shaft, a right turbine (108), a right turbine shaft (109) coaxially arranged with the right turbine, a sleeve (111) passing through the right turbine shaft, a right synchronous pulley (115) fixed on the right synchronous pulley shaft (117), a synchronous belt (116) wound around the left synchronous pulley and the right synchronous pulley, and a left synchronous pulley (117) fixed on the right turbine shaft. A horizontal bevel gear (105) on the turbine shaft, a vertical bevel gear (106) meshing with the horizontal bevel gear, and a transmission shaft (107) coaxially arranged with the vertical bevel gear and used for outputting power, wherein one end of the sleeve is provided with a bearing hole, and the other end is connected and fixed to a flange (110), a ratchet (113) is fixed on the outer surface of the bearing hole, a bearing (112) is provided in the bearing hole, the bearing (112) is passed through a right synchronous pulley shaft (117), and a ratchet (114) meshing with the ratchet (113) is passed through the right synchronous pulley shaft (117).

3. The directional and automatic speed regulating ocean current power generation device according to claim 2 is characterized in that: The left turbine (101) and the right turbine (108) are two turbines with blades rotating in opposite directions.

4. The directional and automatic speed regulating ocean current power generation device according to claim 2 is characterized in that: The left turbine connecting shaft (103) and the right turbine connecting shaft (109) are arranged in parallel.

5. The directional and automatic speed regulating ocean current power generation device according to claim 1, characterized in that: The automatic speed regulating module (200) comprises a flange bearing seat (201) connected to a power module, a coupling (202) connected to the power module, a centrifugal mechanism connected to the coupling, a truncated table (212) driven by the centrifugal mechanism, an inclined shaft (215) coaxially arranged with the truncated table, an inclined bevel gear (213) fixed on the inclined shaft, and an upper horizontal bevel gear (214) meshing with the inclined bevel gear, wherein the central axis of the upper horizontal bevel gear (214) outputs power to a power generation module.

6. The directional and automatic speed regulating ocean current power generation device according to claim 5 is characterized in that: The centrifugal mechanism comprises a base (203) with an extension shaft, a slider (208) sleeved on the extension shaft, a pull column (204) whose lower end is hinged on the base and whose upper end is connected to the slider via a connecting rod (205), a disc (207) connected to the upper surface of the slider via a connecting shaft (206), and a spring (209) sleeved on the extension shaft. The spring is fixed to the uppermost end of the extension shaft of the base and is used to reset the slider.

7. The directional and automatic speed regulating ocean current power generation device according to claim 6 is characterized in that: The disc is fitted with the truncated cone, the truncated cone is an inverted trapezoid, and the generatrix of the truncated cone is perpendicular to the ground.

8. The directional and automatic speed regulating ocean current power generation device according to claim 6 is characterized in that: The protection module (400) comprises a push column (401) connected to the disk through a disk bearing (210) and does not rotate with the disk, a rotating link (405) with one end connected to the upper end of the push column through a fixed link (402), a flange connection plate (403) located on both sides of the middle of the rotating link and fixed through a flange connection shaft (404), a protection box rod (406) connected to the other end of the rotating link through the fixed link (402), a box rod slot (407) sleeved on the protection box rod and connected to the shell, a protection box (409) located at the lower end of the protection box rod and used to block ocean currents, and a buckle (408) located on the protection box and movable up and down along the shell slot.

9. The directional and automatic speed regulating ocean current power generation device according to claim 5, characterized in that: The lower end of the oblique shaft is connected to the housing via a lower fixing block (211), and the upper end of the oblique shaft is connected to the housing via an upper fixing block (216).

10. The directional and automatic speed regulating ocean current power generation device according to claim 1, characterized in that: The power generation module (300) comprises a pinion shaft (302) fixed to the automatic speed regulating module, a pinion (301) fixed on the pinion shaft, a large gear (304) meshing with the pinion, a large gear shaft (303) coaxially arranged with the large gear, a large gear shaft bevel gear (305) fixed on the large gear shaft, a lower bevel gear (306) meshing with the large gear shaft bevel gear, a lower bevel gear shaft (307) fixed to the lower bevel gear, a magnet connection plate (309) fixed on the lower bevel gear shaft, magnets (310) located on both sides of the magnet connection plate, a coil fixing platform (311) fixed on the lower bevel gear shaft through a bearing seat and not rotating with the lower bevel gear shaft, and a plurality of coils (308) located on the coil fixing platform; when the lower bevel gear shaft rotates to drive the magnet connection plate to rotate, the magnet rotates, and the coil cuts the magnetic flux lines to generate electricity.

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