Efficient multi-motor wave energy conversion system for multiple sea conditions

Abstract

The invention provides an efficient multi-motor wave energy conversion system for multiple sea conditions, and relates to the technical field of clean energy equipment, the multi-motor wave energy conversion system is mainly composed of a main box body, a floater and a power transmission device arranged between the floater and the main box body, the main box body is internally provided with a power conversion device and at least two generators, and the power conversion device and the generators are arranged in the main box body. The generators are arranged in the circumferential direction of the power conversion device and are in driving connection with the power conversion device, the power conversion device adjusts the output power of each generator, and the power transmission device is in driving connection with the power conversion device. When the driving force of waves is small, a single generator does not rotate to generate electricity, and the driving capacity of the waves exceeds the rated power of the single generator, the single generator may be overloaded or maintain the maximum output power through an adjusting means, but the configuration of the multiple different generators is adopted, various sea condition resources can be fully utilized, and the energy consumption is reduced. And the power generation efficiency of the wave energy conversion system is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of clean energy equipment, and particularly to an efficient multi-motor wave energy conversion system for multiple sea conditions. Background Art

[0002] Wave energy is a widely distributed, huge in reserves and inexhaustible renewable clean energy. According to the global wind wave model verified and calibrated by satellite altimeter data and the buoy data in the World Wave Database, the estimated wave energy globally per year is 32,000 Twh. Making full use of this energy is of great significance to global environmental protection. It presents in the form of mechanical energy and has the characteristics of large energy density and high quality. Investing manpower, material resources and financial resources in the development and utilization of wave energy is of great significance for solving the increasingly severe environmental pollution and energy shortage problems. At the same time, it can also provide an ideal power supply for ocean resource exploration and development equipment.

[0003] Wave energy conversion devices can be divided into three categories according to physical design and working principle: oscillating body type, oscillating water column type and overtopping type. Among them, the oscillating body type wave energy conversion device has become the most widely used wave energy conversion equipment due to its advantages such as convenient installation, small volume and strong adaptability.

[0004] However, most oscillating body type wave energy conversion devices only have one motor, with inflexible configuration and low power generation efficiency, and cannot make full use of wave energy resources. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide an efficient multi-motor wave energy conversion system for multiple sea conditions, so as to solve the technical problems in the prior art that the oscillating body type wave energy conversion device only has one motor, with inflexible configuration, low power generation efficiency and inability to make full use of wave energy resources.

[0006] To achieve the above purpose, the present invention provides an efficient multi-motor wave energy conversion system for multiple sea conditions, including a main box body, a float and a power transmission device arranged between the float and the main box body. A power conversion device and at least two generators are arranged in the main box body. The generators are arranged circumferentially of the power conversion device and are drivingly connected to the power conversion device. The power conversion device adjusts the output power of each generator, and the power transmission device is drivingly connected to the power conversion device.

[0007] Optionally, the power transmission device includes a connecting rod, a first connection box and a second connection box. The second connection box is fixedly arranged above the float. The connecting rod is arranged between the first connection box and the second connection box and is rotatably connected to both the first connection box and the second connection box.

[0008] Optionally, the first connection box includes a lower part of the first connection box, a middle part of the first connection box, and an upper part of the first connection box that are stacked and connected in sequence from bottom to top. The lower part of the first connection box is connected to the main box body. A bearing is provided between the upper part of the first connection box and the middle part of the first connection box. An upper stepped shaft is installed on the bearing. One end of the upper stepped shaft is drivingly connected to the transmission through a coupling; A pin hole is also provided on the upper stepped shaft. The connecting rod is synchronously rotated with the upper stepped shaft by inserting a pin into the pin hole; A bearing end cover is provided on the outer end surface of the bearing. The inner end of the bearing is in contact with the inner walls of the upper part of the first connection box and the middle part of the first connection box; The connection method between the middle part of the first connection box and the lower part of the first connection box is the same as the connection method between the upper part of the first connection box and the middle part of the first connection box.

[0009] Optionally, the second connection box includes a lower part of the second connection box, a middle part of the second connection box, and an upper part of the second connection box that are stacked and connected in sequence from bottom to top. The lower part of the second connection box is connected to the float. An upper stepped shaft connected by a bearing is provided between the upper part of the second connection box and the middle part of the second connection box. The inner end of the bearing is in contact with the inner walls of the upper part of the second connection box and the middle part of the second connection box. A bearing end cover is provided at the outer end of the bearing; The end of the connecting rod is nested on the outer ring of the bearing and axially positioned through a sleeve and the bearing end cover; The connection method between the middle part of the second connection box and the lower part of the second connection box is the same as the connection method between the upper part of the second connection box and the middle part of the second connection box.

[0010] Optionally, the power conversion device includes a transmission, a mechanical rectifier, a bevel gear box, a differential, a brake, and a clutch. The power transmission device is drivingly connected to the transmission. The mechanical rectifier is provided between the bevel gear box and the differential or between the transmission and the bevel gear box and is drivingly connected at the same time. Both sides of the differential are drivingly connected to the generator through the brake. The bevel gear box is drivingly connected to the clutch through a coupling. The clutch is drivingly connected to the generator through a coupling; When the mechanical rectifier is provided between the bevel gear box and the differential, the generator connected to the clutch is set as a motor. The motor rotates reciprocally to generate electricity, and the generator connected to the differential rotates unidirectionally to generate electricity; When the mechanical rectifier is provided between the transmission and the bevel gear box, the generator connected to the clutch rotates unidirectionally to generate electricity, and the generator connected to the differential rotates unidirectionally to generate electricity.

[0011] Optionally, the power conversion device further includes a controller and a servo system. The controller is electrically connected to the differential through the servo system, and the controller is electrically connected to the brake and the clutch.

[0012] Optionally, when the float moves up and down with the waves, the connecting rod drives the stepped shaft of the first connection box to make small reciprocating swings, and transmits power to the transmission through a coupling, and the transmission amplifies the movement amplitude; When it is necessary to actively control the float, the controller controls the clutch to engage, and the transmission acts as a reducer, converting the high speed and low torque from the motor into low speed and high torque.

[0013] Optionally, the transmission includes a lower box body and an upper box body. The upper box body is located on the lower box body and is connected by bolts. The lower box body is fixed to the main box body by bolts; A stepped shaft and a stepped gear shaft are provided between the upper box body and the lower box body. When the stepped shaft is used as the input shaft, the transmission converts the low speed and small amplitude movement with large torque from the float into large speed and large amplitude movement with small torque, driving the generator to generate electricity; When the stepped gear shaft is used as the input shaft, the transmission converts the high speed and large amplitude movement with small torque from the motor into low speed and small amplitude movement with large torque to control the stable movement of the float.

[0014] Optionally, the bevel gear box includes an upper box body and a lower box body connected by bolts. The lower box body is connected to the main box body by bolts. There are also a first bevel gear shaft, a second bevel gear shaft and a third bevel gear shaft meshing with each other between the upper box body and the lower box body. The first bevel gear shaft, the second bevel gear shaft and the third bevel gear shaft are all nested with bearings; when the mechanical rectifier is arranged between the bevel gear box and the differential, the end of the first bevel gear shaft is connected to the transmission through a coupling, the end of the second bevel gear shaft is connected to the mechanical rectifier through a coupling, and the end of the third bevel gear shaft is connected to the clutch through a coupling; when the mechanical rectifier is arranged between the bevel gear box and the transmission, the end of the first bevel gear shaft is connected to the mechanical rectifier through a coupling, the end of the second bevel gear shaft is connected to the differential through a coupling, and the third bevel gear shaft is connected to the clutch through a coupling; When the first bevel gear shaft receives power from the transmission or the mechanical rectifier, the first bevel gear shaft is the input shaft, and the second bevel gear shaft and the third bevel gear shaft are the output shafts, respectively transmitting power to the mechanical rectifier or the differential and the clutch; When the third bevel gear shaft receives power from the motor through the clutch, the third bevel gear shaft is the input shaft, and the first bevel gear shaft and the second bevel gear shaft are output shafts, which respectively transmit power to the mechanical rectifier or the transmission and the differential or the mechanical rectifier.

[0015] Optionally, when the motor acts as a generator, the controller controls the state of the clutch; When the motor moves passively, when the controller controls the clutch to engage, the motor acts as a generator, and when the controller controls the clutch to disengage, the motor is in an idle state; when the motor moves actively, the controller controls the clutch to engage to control the movement of the float.

[0016] Optionally, the differential includes a lower box body and an upper box body. The lower box body is connected to the main box body by bolts, and further includes a left output gear shaft and a right output gear shaft. The brake controls the rotation of the left output gear shaft and the right output gear shaft; When the controller makes the brake connected to the left output gear shaft in an open state, the left output gear shaft stops rotating and the large generator does not generate electricity; when the controller makes the brake connected to the right output gear shaft in an open state, the right output gear shaft stops rotating and the small generator does not generate electricity; when the brake is in an open state, the differential lock block cannot be opened.

[0017] The high-efficiency multi-motor wave energy conversion system for multiple sea conditions provided by the present invention has the following technical effects: This high-efficiency multi-motor wave energy conversion system for multiple sea conditions mainly consists of a main box body, a float, and a power transmission device provided between the float and the main box body. A power conversion device and at least two generators are provided in the main box body. The generators are arranged circumferentially of the power conversion device and are drivingly connected to the power conversion device. The power conversion device adjusts the output power of each generator. The power transmission device is drivingly connected to the power conversion device. The wave energy conversion system of the present invention includes multiple generators, and the starting torques of different generators are different. Compared with a single generator, when the driving force of the wave is small, the single generator does not rotate to generate electricity. When the driving ability of the wave exceeds the rated power of the single generator, the single generator may be overloaded or maintain the maximum output power through adjustment means. However, the present invention adopts a configuration of multiple different generators, which can make full use of various sea condition resources and improve the power generation efficiency of the wave energy conversion system. Description of the Drawings

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0019] Figure 1 It is a schematic structural diagram of a preferred embodiment of the high-efficiency multi-motor wave energy conversion system of the present invention facing multiple sea conditions; Figure 2 It is a three-dimensional structural schematic diagram of another preferred embodiment of the high-efficiency multi-motor wave energy conversion system of the present invention facing multiple sea conditions; Figure 3 It is Figure 2 The top view of the high-efficiency multi-motor wave energy conversion system facing multiple sea conditions in Figure 4 It is Figure 1 or Figure 2 The alternate view of the high-efficiency multi-motor wave energy conversion system facing multiple sea conditions in Figure 5 It is Figure 1 or Figure 2 The schematic structural diagram of the power transmission device of the high-efficiency multi-motor wave energy conversion system facing multiple sea conditions in Figure 6 It is Figure 5 The front view of the power transmission device in Figure 7 It is Figure 5 The top view of the partial internal structure of the power transmission device in Figure 8 It is Figure 7 The cross-sectional view along the A-A direction in Figure 9 It is Figure 7 The cross-sectional view along the B-B direction in Figure 10 It is Figure 1 or Figure 2 The schematic structural diagram of the transmission of the high-efficiency multi-motor wave energy conversion system facing multiple sea conditions in Figure 11 It is Figure 10 The internal structure diagram of the transmission in Figure 12 It is Figure 1 or Figure 2 The schematic structural diagram of the bevel gearbox of the high-efficiency multi-motor wave energy conversion system facing multiple sea conditions in Figure 13 It is Figure 12 The internal structure diagram of the bevel gearbox in Figure 14 Figure 1 Schematic diagram of the structure of the mechanical rectifier of the high-efficiency multi-motor wave energy conversion system for multiple sea conditions; Figure 15 is Figure 14 Cross-sectional view of the mechanical rectifier along the A-A direction in; Figure 16 is Figure 14 Cross-sectional view of the mechanical rectifier along the B-B direction in; Figure 17 is Figure 14 Front view schematic diagram of the mechanical rectifier in; Figure 18 is Figure 14 Top view schematic diagram of the mechanical rectifier in; Figure 19 is Figure 14 Another structural principle schematic diagram of the mechanical rectifier in; Figure 20 is Figure 14 Another structural principle schematic diagram of the mechanical rectifier in; Figure 21 is Figure 1 or Figure 2 Schematic diagram of the structure of the differential of the high-efficiency multi-motor wave energy conversion system for multiple sea conditions; Figure 22 is Figure 21 Cross-sectional view of the differential along the A-A direction in; Figure 23 is Figure 21 Principle schematic diagram of the differential in; Figure 24 is Figure 21 Principle schematic diagram of the differential in; Figure 25 is Figure 2 Schematic diagram of the structure of the mechanical rectifier of the high-efficiency multi-motor wave energy conversion system for multiple sea conditions; Figure 26 is Figure 25 Principle structure diagram of the mechanical rectifier in.

[0020] Among them, Figures 1 - 26 : 1. Float; 2. Power transmission device; 21. First connection box; 211. Lower part of the first connection box; 212. Middle part of the first connection box; 213. Lower stepped shaft; 214. Upper stepped shaft; 215. Bearing end cover; 216. Upper part of the first connection box; 217. Pin; 218. Bearing; 22. Connecting rod; 23. Second connection box; 231. Upper part of the second connection box; 232. Middle part of the second connection box; 233. Lower part of the second connection box; 234. Bearing end cover; 235. Bearing; 236. Sleeve; 237. Bearing end cover; 238. Bearing; 239. Upper stepped shaft; 3. Large generator; 4. Controller; 5. Servo system; 6. Brake; 7. Differential; 701. Lower housing; 702. Steel wire cable; 703. Differential lock lever; 704. Differential lock block; 705. Differential lock ring; 706. Upper housing; 707. Sleeve; 708. Left output gear shaft; 709. Bearing end cover; 710. Bearing; 711. Bearing; 712. Bearing end cover; 713. Main gear; 714. Side gear housing; 715. Bearing end cover; 716. Bearing; 717. Bearing; 718. Side gear; 719. Side shaft; 720. Bearing; 721. Bearing end cover; 722. Right output gear shaft; 723. Right housing; 724. Bearing end cover; 725. Bearing; 726. Side gear; 727. Bearing; 728. Bearing; 729. Bearing end cover; 730. Side gear housing; 731. Bearing; 732. Bearing end cover; 733. Input gear shaft; 8. Small generator; 9. Generator (motor); 10. Clutch; 11. Coupling; 12. Mechanical rectifier; 1201. Lower housing; 1202. Middle housing; 1203. Upper housing; 1204. Bearing end cover; 1205. Bearing; 1206. Intermediate shaft; 1207. Idler gear; 1208. Sleeve; 1209. Bearing; 1210. Bearing end cover; 1211. Bearing end cover; 1212. Bearing; 1213. Sleeve; 1214. Large gear; 1215. Input shaft; 1216. Bearing; 1217. Bearing end cover; 1218. Output shaft; 1219. Bearing end cover; 1220. Bearing; 1221. Sleeve; 1222. One-way gear; 1223. One-way gear; 1224. Sleeve; 1225. Bearing; 1226. Bearing end cover; 1227. Lock ring; 1228. Clutch device; 1229. Output shaft; 13. Bevel gear box; 1301. Lower housing; 1302. Upper housing; 1303. Bearing end cover; 1304. First bevel gear shaft; 1305. Bearing; 1306. Second bevel gear shaft; 1307. Bearing end cover; 1308. Bearing; 1309. Bearing end cover; 1310. Third bevel gear shaft; 1311. Bearing; 14. Transmission; 1401. Lower housing; 1402. Upper housing; 1403. Step gear shaft; 1404. Bearing cover; 1405. Bearing; 1406. Bearing cover; 1407. Bearing; 1408. Sleeve; 1409. Intermediate step shaft pinion; 1410. Intermediate step shaft gear; 1411. Sleeve; 1412. Bearing; 1413. Bearing; 1414. Bearing cover; 1415. Bearing cover; 1416. Step shaft; 1417. Bearing cover; 1418. Bearing; 1419. Sleeve; 1420. Gear; 1421. Bearing; 1422. Bearing cover; 1423. Intermediate step shaft 15. Main housing Detailed implementation mode

[0021] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation manners obtained by those of ordinary skill in the art without making creative efforts fall within the scope protected by the present invention

[0022] Based on the defects recorded in the background art, the following will be combined with specific attached Figures 1 - 26 A detailed description of the high-efficiency multi-motor wave energy conversion system for multiple sea conditions of the present invention will be given

[0023] As Figure 1 and Figure 2 shown, it is a schematic structural diagram of the high-efficiency multi-motor wave energy conversion system for multiple sea conditions of the present invention. This high-efficiency multi-motor wave energy conversion system for multiple sea conditions includes a main housing 15, a float 1, and a power transmission device 2 provided between the float 1 and the main housing 15. A power conversion device and at least two generators are provided in the main housing 15. The generators are arranged circumferentially around the power conversion device and are drivingly connected to the power conversion device. The power conversion device adjusts the output power of each generator, and the power transmission device 2 is drivingly connected to the power conversion device

[0024] The wave energy conversion system of the present invention includes multiple generators, and the starting torques of different generators are different. Compared with a single generator, when the driving force of the wave is small, the single generator will not rotate to generate electricity. When the driving ability of the wave exceeds the rated power of the single generator, the single generator may be overloaded or maintain the maximum output power through adjustment means. However, the present invention adopts a configuration of multiple different generators, which can make full use of various sea condition resources and improve the power generation efficiency of the wave energy conversion system

[0025] As a preferred implementation manner, as Figures 5 - 9As shown in the figure, the power transmission device 2 includes a connecting rod 22, a first connection box 21, and a second connection box 23. The second connection box 23 is fixedly arranged above the float 1. The connecting rod 22 is arranged between the first connection box 21 and the second connection box 23 and is rotatably connected to both the first connection box 21 and the second connection box 23 at the same time. The second connection box 23 is connected to the float 1.

[0026] The connecting rod 22 of this embodiment includes four. The four connecting rods are spaced at a certain distance and extend along the axial direction, forming a structure with a parallelogram cross-section, and the float 1 can maintain the same direction as the main box body 15.

[0027] Since the second connection box 23 is connected to the float 1, on the one hand, the second connection box 23 plays a connecting role, and on the other hand, it provides gravity for the ballast liquid level of the float 1.

[0028] When the float 1 swings with the waves, the float 1 always maintains the same direction as the main box body 15. The first connection box is fixed on the main box body 15, and the second connection box is connected to the float 1 by bolts.

[0029] Among them, as Figures 5 - 9 shown, the first connection box includes a first connection box lower part 211, a first connection box middle part 212, and a first connection box upper part 216 that are stacked and connected in sequence from bottom to top. And the first connection box lower part 211 is connected to the main box body 15. There is a bearing 218 between the first connection box upper part 216 and the first connection box middle part 212. An upper stepped shaft 214 is installed on the bearing 218. One side end of the upper stepped shaft 214 is drivingly connected to the transmission 14 through a coupling 11; there is also a pin 217 hole on the upper stepped shaft 214, and the connecting rod rotates synchronously with the upper stepped shaft 214 by inserting a pin 217 into the pin 217 hole; a bearing end cover 215 is covered on the outer end face of the bearing 218, and the inner end of the bearing 218 contacts the inner walls of the first connection box upper part 216 and the first connection box middle part 212.

[0030] The connection method between the first connection box middle part 212 and the first connection box lower part 211 is the same as that between the first connection box upper part 216 and the first connection box middle part 212, that is, there is a lower stepped shaft 213 between the first connection box middle part 212 and the first connection box lower part 211, and the configuration of the bearing 218, the pin 217, etc. is the same as that between the first connection box upper part 216 and the first connection box middle part 212.

[0031] In addition, the second connection box 23 includes a second upper connection box 231, a second middle connection box 232, and a second lower connection box 233 that are stacked in sequence from top to bottom and connected by bolts. The second lower connection box 233 is connected to the float 1 by bolts. An upper stepped shaft 239 connected by bearings 235 and 238 is provided between the second upper connection box 231 and the second middle connection box 232. The inner ends of the bearings 235 and 238 are in contact with the inner walls of the second upper connection box 231 and the second middle connection box 232. Bearing end covers 234 and 237 are provided at the outer ends of the bearings 235 and 238 to achieve axial positioning. The end of the connecting rod is nested on the outer ring of the bearing 235, and the bearing 235 is axially positioned by a sleeve 236 and bearing end covers 234 and 237.

[0032] The connection mode between the second middle connection box 232 and the second lower connection box 233 is the same as that between the second upper connection box 231 and the second middle connection box 232, that is, there is a lower stepped shaft between the second middle connection box 232 and the second lower connection box 233, and the configuration of the bearings 235, 238, etc. is the same as that between the second upper connection box 231 and the second middle connection box 232.

[0033] As a preferred embodiment, the power conversion device includes a transmission 14, a mechanical rectifier 12, a bevel gear box 13, a differential 7, a brake 6, and a clutch 10. The power transmission device 2 is drivingly connected to the transmission 14. The mechanical rectifier 12 is disposed between the bevel gear box 13 and the differential 7 or between the transmission 14 and the bevel gear box 13 and is drivingly connected at the same time. Both sides of the differential 7 are drivingly connected to the generators 3 and 8 through the brakes 6. The bevel gear box 13 is drivingly connected to the clutch 10 through a coupling 11. The clutch 10 is drivingly connected to the generator 9 through the coupling 11. When the mechanical rectifier 12 is disposed between the bevel gear box 13 and the differential 7, the generator connected to the clutch 10 is set as the motor 9, that is, the motor 9 can be used for both power generation and active motion control. The motor 9 rotates reciprocally to generate electricity, and the generators 3 and 8 connected to the differential 7 rotate unidirectionally to generate electricity. When the mechanical rectifier 12 is disposed between the transmission 14 and the bevel gear box 13, the generator 9 connected to the clutch 10 rotates unidirectionally to generate electricity, and the generators 3 and 8 connected to the differential 7 rotate unidirectionally to generate electricity.

[0034] In addition, the power conversion device further includes a controller 4 and a servo system 5. The controller 4 is electrically connected to the differential 7 through the servo system 5. The controller 4 is electrically connected to the brake 6 and the clutch 10.

[0035] The transmission 14 in this embodiment functions to change speed and torque. When the float 1 moves up and down with the waves, the connecting rod 22 drives the stepped shaft 214 on the first connection box to make small reciprocating swings, and the power is transmitted to the transmission 14 through the coupling 11, and the transmission 14 amplifies the movement amplitude; when the float 1 needs to be actively controlled, the transmission 14 acts as a reducer, converting the high rotational speed and low torque from the motor 9 into low rotational speed and high torque.

[0036] Specifically, as Figure 10 and Figure 11 shown, the transmission 14 is composed of a lower box body 1401, an upper box body 1402, and many components such as gears and bearings. The upper box body 1402 and the lower box body 1401 are connected by bolts, and the lower box body 1401 is fixed to the main box body 15 by bolts. The bearing end cover 1422 is connected to the upper box body 1402 and the lower box body 1401 by bolts to achieve the axial positioning of the front end of the front bearing 1421; one end of the stepped shaft 1416 is nested in the inner ring of the front bearing 1421, and the axial positioning with the rear end of the front bearing 1421 is achieved through the shaft shoulder; the large gear 1420 is nested on the stepped shaft 1416 and rotates synchronously with the stepped shaft 1416; the front end of the large gear 1420 is positioned by the shaft shoulder of the stepped shaft 1416, and the rear end is axially positioned by the sleeve 1419; one end of the bearing 1418 is in close contact with the sleeve 1419, and the other end relies on the bearing end cover 1417 to achieve axial positioning; the stepped shaft 1416 is connected to the upper stepped shaft 214 in the first connection box 21 of the power transmission device 2 through the coupling 11.

[0037] The intermediate stepped shaft 1423 is nested with an intermediate stepped shaft pinion 1409 and an intermediate stepped shaft large gear 1410 that rotate synchronously with it; the axial positioning of the bearings 1407, 1413, the intermediate stepped shaft pinion 1409, and the intermediate stepped shaft large gear 1410 is achieved by relying on the shaft shoulder of the intermediate stepped shaft 1423, the sleeves 1408, 1411, the bearing end cover 1406, and the bearing end cover 1415; the intermediate stepped shaft pinion 1409 meshes with the large gear 1420.

[0038] The stepped gear shaft 1403 relies on its shaft shoulder, the bearing end cover 1404, and the bearing end cover 1414 to achieve the axial positioning of the bearings 1405 and 1412; the teeth on the stepped gear shaft 1403 mesh with the intermediate stepped shaft large gear 1410; the stepped gear shaft 1403 is connected to the first bevel gear shaft 1304 of the bevel gear box 13 through the coupling 11.

[0039] When the stepped shaft 1416 serves as the input shaft, the transmission 14 converts the low rotational speed, small torque, and small-amplitude motion from the float 1 into a large rotational speed, small torque, and large-amplitude motion, thereby driving the large generator 3, small generator 8, and generator (motor) 9 to generate electricity. When the stepped gear shaft 1403 serves as the input shaft, the transmission 14 converts the high rotational speed, small torque, and large-amplitude motion from the motor 9 into a low rotational speed, large torque, and small-amplitude motion to control the stable motion of the float 1.

[0040] As a preferred embodiment, as Figure 12 and Figure 13 shown, the bevel gearbox 13 consists of two parts: the upper housing 1302 and the lower housing 1301 connected by bolts. The lower housing 1301 is connected to the main housing 15 by bolts. The bearing end caps 1303, 1307, and 1309 cooperate with the upper housing 1302 and the lower housing 1301 to achieve the axial positioning of the bearings 1305, 1308, and 1311. The first bevel gear shaft 1304, the second bevel gear shaft 1306, and the third bevel gear shaft 1310 mesh with each other and are nested on the bearings 1305, 1308, and 1311. The first bevel gear shaft 1304, the second bevel gear shaft 1306, and the third bevel gear shaft 1310 are respectively connected to the transmission 14 or the mechanical rectifier 12, the mechanical rectifier 12 or the differential 7, and the clutch 10 through the couplings 11.

[0041] When the first bevel gear shaft 1304 receives power from the transmission 14 or the mechanical rectifier 12, the first bevel gear shaft 1304 is the input shaft, and the second bevel gear shaft 1306 and the third bevel gear shaft 1310 are the output shafts, which respectively transmit the power to the mechanical rectifier 12 or the differential 7 and the clutch 10. When the third bevel gear shaft 1310 receives power from the motor 9 through the clutch 10, the third bevel gear shaft 1310 is the input shaft, and the first bevel gear shaft 1304 and the second bevel gear shaft 1306 are the output shafts, which respectively transmit the power to the mechanical rectifier 12 or the transmission 14 and the differential 7 or the mechanical rectifier 12. Through the controller 4, the motor 9 can be engaged through the clutch 10 to transmit the power to the gear shaft 1304, and then sequentially through the transmission 14 or the mechanical rectifier 12, the transmission 14, and the first connection box of the power transmission device 2 to finally achieve the motion control of the float 1.

[0042] As a preferred embodiment, the clutch 10 has two states: engaged and disengaged. When the motor 9 serves as a generator, the controller 4 controls the state of the clutch 10. When the controller 4 controls the clutch 10 to be engaged, the motor 9 serves as a generator. When the controller 4 controls the clutch 10 to be disengaged, the motor 9 is in an idle state. When the motor 9 moves actively, the controller 4 controls the clutch 10 to be engaged to control the motion of the float 1.

[0043] As a preferred embodiment, as Figure 14 , 15 shown in and 16, the mechanical rectifier 12 is composed of three parts: a lower box body 1201, a middle box body 1202, and an upper box body 1203. They are connected by bolts, and the lower box body 1201 is connected to the main box body 15 by bolts. The intermediate shaft 1206 is located between the upper box body 1203 and the middle box body 1202. The bearings 1205 and 1209 are respectively nested at both ends of the intermediate shaft 1206, and their axial positioning at one end is achieved by relying on the shaft shoulders of the intermediate shaft 1206; the other ends of the bearings 1205 and 1209 are axially positioned by bearing end covers 1204 and 1210 that are screwed to the upper box body 1203 and the middle box body 1202 respectively. The idler gear 1207 is nested on the intermediate shaft 1206 and rotates synchronously with the intermediate shaft 1206. Its axial positioning at one end is achieved by a shaft shoulder, and the sleeve 1208 realizes the axial positioning of the other end of the idler gear 1207.

[0044] The input shaft 1215 and the output shaft 1218 are located between the middle box body 1202 and the lower box body 1201. They are respectively connected to the second bevel gear shaft 1306 and the input gear shaft 733 of the differential 7 through couplings 11. The bearings 1212 and 1216 are respectively nested at both ends of the input shaft 1215, and their axial positioning at one end is achieved by relying on shaft shoulders; the other ends of the bearings 1212 and 1216 are axially positioned by bearing end covers 1211 and 1217 that are screwed to the middle box body 1202 and the lower box body 1201 respectively. The large gear 1214 is nested on the input shaft 1215 and rotates synchronously with the input shaft 1215; the axial positioning of one end of the large gear 1214 is achieved by the shaft shoulder of the input shaft 1215, and the sleeve 1213 realizes the axial positioning of the other end; the large gear 1214 meshes with the idler gear 1207.

[0045] The bearings 1220 and 1225 are respectively nested at both ends of the output shaft 1218, and their axial positioning at one end is achieved by relying on shaft shoulders; the other ends of the bearings 1220 and 1225 are axially positioned by bearing end covers 1219 and 1226 that are screwed to the middle box body 1202 and the lower box body 1201 respectively; one end of the one-way gear 1222 and the one-way gear 1223 is positioned by the shaft shoulder of the output shaft 1218, and the axial positioning of the other end is respectively achieved by the sleeves 1221 and 1224; the one-way gear 1222 meshes with the large gear 1214, and the one-way gear 1223 meshes with the idler gear 1207. The mechanical rectifier 12 converts the bidirectional motion received by the input shaft 1215 into a unidirectional rotation of the output shaft 1218.

[0046] When the mechanical rectifier 12 is provided between the bevel gearbox 13 and the differential 7, the generator connected to the clutch 10 is set as the motor 9. The motor 9 rotates reciprocally to generate electricity, and the generator connected to the differential 7 rotates unidirectionally to generate electricity, as Figure 1 shown.

[0047] The mechanical rectifier 12 of this embodiment converts the input reciprocating motion into the output unidirectional motion, as Figure 17 and Figure 18 shown, and the principle is as follows: The input shaft 1215 rotates reciprocally synchronously with the large gear 1214, and the output shaft 1218 rotates synchronously with the inner rings of the one-way gears 1222 and 1223. The large gear 1214 meshes directly with the outer ring of the lower one-way gear 1222 and indirectly with the outer ring of the upper one-way gear 1223 through the idler gear 1207. Therefore, the outer rings of the upper one-way gear 1223 and the lower one-way gear 1222 are always in opposite rotational directions. For the one-way transmission gear, it can be seen that when the outer ring of the one-way gear 1223 rotates counterclockwise, since the output shaft 1218 is connected with a load, the inner ring of the one-way gear 1223 will not move, so the output shaft 1218 will not rotate either. When the outer ring of the one-way gear 1223 rotates clockwise, it will drive its inner ring to rotate, and then drive the output shaft 1218 to rotate. For the reciprocating rotation from the input shaft 1215, a single one-way gear 1223 will only cause the output shaft 1218 to rotate when the input shaft 1215 moves in a specific direction. For example, in this example, when the input shaft 1215 reciprocates, when only the upper one-way gear 1223 and the idler gear 1207 exist, the output shaft 1218 will only rotate clockwise. Specifically, when the input shaft 1215 rotates clockwise, the output shaft 1218 rotates clockwise, and when the input shaft 1215 rotates counterclockwise, the output shaft 1218 does not rotate. When only the lower one-way gear 1222 exists, the one-way gear 1222 meshes directly with the large gear 1214, and the rotation direction will not be further changed. Then when the input shaft 1215 rotates counterclockwise, the lower one-way gear 1222 will drive the output shaft 1218 to rotate clockwise.

[0048] Therefore, when there are two one-way gears 1222 and 1223, no matter how the input shaft 1215 rotates, the output shaft 1218 always moves in one direction. When the input shaft 1215 rotates clockwise, the outer ring of the upper one-way gear 1223 rotates clockwise, and the outer ring of the lower one-way gear 1222 rotates counterclockwise; the outer ring of the upper one-way gear 1223 drives the inner ring to make the output shaft 1218 rotate clockwise. At this time, the inner ring of the lower one-way gear 1222 also rotates clockwise. Finally, the outer ring of the lower one-way gear 1222 rotates counterclockwise and the inner ring rotates clockwise, and the whole system runs smoothly without jamming.

[0049] When the input shaft 1215 rotates counterclockwise, the outer ring of the upper one-way gear 1223 rotates counterclockwise, and the outer ring of the lower one-way gear 1222 rotates clockwise; the outer ring of the lower one-way gear 1222 drives the inner ring to make the output shaft 1218 rotate clockwise. At this time, the inner ring of the upper one-way gear 1223 also rotates clockwise while the outer ring rotates counterclockwise, and it will not jam.

[0050] In addition to the above structure, the internal structure of the mechanical rectifier 12 can also be in the following form, such as Figure 19 As shown, due to the characteristics of belt drive and gear meshing, when the input shaft 1215 reciprocates, the rotation directions of the outer rings of the one-way gear and the one-way pulley are always opposite, and one of them will always drive the output shaft 1218 to rotate; as Figure 20 As shown, when the ring gear serves as the input shaft 1215 and reciprocates, due to the different numbers of gears between the two one-way gears and the ring gear, no matter how the ring gear moves, the rotation directions of the outer rings of the two middle one-way gears are always opposite, and one of them always drives the output shaft 1218 to move.

[0051] As a preferred embodiment, such as Figure 21As shown, the outside of the differential 7 consists of a lower housing 701 and an upper housing 706 connected by bolts. The lower housing 701 is connected to the main housing 15 by bolts. The input gear shaft 733 connected to the mechanical rectifier 12 or the bevel gearbox 13 through the coupling 11 is nested in the inner ring of the bearing 731 and meshes with the main gear 713. One end of the bearing 731 is closely attached to the inner walls of the lower housing 701 and the upper housing 706, and the other end is axially positioned by the bearing end cover 732 connected to the upper housing 706 and the lower housing 701. The left output gear shaft 708 meshes with the side gears 718 and 726, and the other side is axially positioned through the sleeve 707 that fits with the main gear 713. The left output gear shaft 708 passes through the bearing 710 and is connected to the brake 6. The bearing 710 is axially positioned through the bearing end cover 709 and the inner walls of the lower housing 701 and the upper housing 706. A differential lock ring 705 is nested on the left output gear shaft 708 and rotates synchronously with the left output gear shaft 708. The differential lock block 704 is divided into left and right halves and can be nested on the differential lock ring 705 after being connected by bolts, but does not rotate synchronously with the differential lock ring 705. The differential lock lever 703 can rotate around its middle, the upper end can slide on the differential lock block 704, and the lower end is connected with a tension spring and a wire cable 702. In the normal state, under the action of the tension of the tension spring, the differential lock lever 703 inclines to the left, so that the differential lock block 704 pulls the differential lock ring 705 to separate it from the main gear 713. Under the action of the controller 4, the servo system 5 pulls the wire cable 702 to engage the differential lock ring 705 with the main gear 713, and the differential lock is locked. At this time, the main gear 713 rotates synchronously with the left output gear shaft 708. The left side of the main gear 713 is nested on the bearing 711, and the right end meshes with the input gear shaft 733. The right end of the bearing 711 is closely attached to the upper housing 706 and the lower housing 701, and the left end is axially positioned through the bearing end cover 712. The side gear racks 714 and 730 are connected to the main gear 713 by bolts. The side shaft 719 is connected between the two racks through the bearings 716 and 728. The outer sides of the bearings 716 and 728 are axially positioned by being pressed tightly by the bearing end cover 715 and the bearing end cover 729. There are also side gears 718 and 726 connected by the bearings 717 and 727 on the side shaft 719. The side gears 718 and 726 both mesh with the left output gear shaft 708 and the right output gear shaft 722. The side gears 718 and 726 can both revolve and rotate on their own axes.The right rack 723 is connected to the side gear rack 714 and the side gear rack 730 by bolts, and its right end is in close contact with the inner ring of the bearing 725; the bearing 725 is axially positioned by the upper housing 706, the lower housing 701 and the bearing end cover 724; the right output gear shaft 722 is connected to the right rack 723 through the bearing 720, and its left side meshes with the side gear 718 and the side gear 726, and the bearing 720 restricts its axial movement to the right; the left end of the bearing 720 is in close contact with the inner wall of the right rack 723, and the right side is positioned by the bearing end cover 721; the right output gear shaft 722 is connected to another brake 6.

[0052] Under the action of the controller 4, the differential 7 can realize the power generation configurations of the generators 3 and 8 under different sea conditions to expand the utilization range of wave energy.

[0053] The principle is as follows: It mainly includes an input gear shaft 733, a main gear 713, a left output gear shaft 708 (which does not rotate synchronously with the main gear 713 when there is no differential lock), a right output gear shaft 722, side gears 718 and their frames, and side gears 726 and their frames. The input gear shaft 733 receives the unidirectional motion from the mechanical rectifier 12 or the bevel gearbox 13, thereby driving the main gear 713 to rotate; the side gear frames 714 and 730 are bolted to the main gear 713. When the main gear 713 rotates, the side gears 718 and 726 connected to the corresponding frames will necessarily revolve, thereby driving the left output gear shaft 708 and the right output gear shaft 722 to rotate; when one of the left output gear shaft 708 or the right output gear shaft 722 is locked and does not rotate, the side gears 718 and 726 will revolve and also rotate on their own axes, so that the other side outputs at a faster speed; similarly, if the loads connected to the left output gear shaft 708 and the right output gear shaft 722 are different, the side gears 718 and 726 will also rotate on their own axes during revolution, thereby achieving different rotational speeds on both sides. To achieve synchronous rotation of the left output gear shaft 708 and the right output gear shaft 722 under different loads, a differential lock is required. The differential lock ring 705 is nested on the left output gear shaft 708 and has splines on its right side. It rotates synchronously with the left output gear shaft 708 and can move axially along the shaft; the differential lock block 704 is nested on the differential lock ring 705. It does not rotate synchronously with the differential lock ring 705, but the differential lock lever 703 can move the differential lock block 704 under the action of the wire cable 702 and the spring, so that the differential lock block 704 can drive the differential lock ring 705 to move axially along the left output gear shaft 708; there is a structure similar to a spline sleeve on the left inner ring of the main gear 713; therefore, under the action of the differential lock ring 705, the differential lock block 704, the differential lock lever 703, as well as the wire cable 702 and the spring, the differential lock ring 705 can either move to the right to be nested with the main gear 713 to achieve synchronous rotation of the left output gear shaft 708 and the main gear 713, or move to the left to separate, and the left output gear shaft 708 rotates relative to the main gear 713. When the left output gear shaft 708 rotates synchronously with the main gear 713, the side gears 718 and 726 only revolve, thereby driving the right output gear shaft 722 to output the same rotational speed as the left output gear shaft 708.

[0054] The brake 6 of this embodiment can control the rotation of the left output gear shaft 708 and the right output gear shaft 722. When the controller 4 makes the brake 6 connected to the left output gear shaft 708 in the open state, the left output gear shaft stops rotating and the large generator 3 does not generate electricity; when the controller 4 makes the brake 6 connected to the right output gear shaft 722 in the open state, the right output gear shaft 722 stops rotating and the small generator 8 does not generate electricity. When the brake 6 is in the open state, the differential lock block 704 cannot be opened.

[0055] The large generator 3 and the small generator 8 of this embodiment are two different configurations, and their functions are all used for power generation. Under different sea conditions, the driving ability of wave energy is different. Through the controller 4, the servo system 5 and the brake 6, the operation of these two generators can be controlled to fully extract wave energy.

[0056] The large generator 3, the small generator 8 and the motor 9 have the following power generation configurations. The "faster rotation speed" in the table is because when the brake 6 locks one side, the side gears 718 and 726 rotate both around the center and on their own axes, which will cause the rotation speed of the other end to become faster. The specific control situation is shown in Table 1.

[0057] Table 1 Power generation configurations of the large generator 3, the small generator 8 and the motor 9

[0058] When the mechanical rectifier 12 is provided between the transmission 14 and the bevel gear box 13 in the high-efficiency multi-motor wave energy conversion system for multiple sea conditions of the present invention, the generator connected to the clutch 10 generates electricity by one-way rotation, and the generator connected to the differential 7 generates electricity by one-way rotation, as Figure 2 shown.

[0059] Since the mechanical rectifier 12 is located between the bevel gear box 13 and the differential 7, when the wave drives the float 1 to generate electricity, the large generator 3 and the small generator 8 can rotate in one direction, while the motor 9 rotates reciprocally to generate electricity. If the mechanical rectifier 12 is placed between the bevel gear box 13 and the transmission 14, the motor 9 will also rotate in one direction to generate electricity. However, placing the mechanical rectifier 12 between the bevel gear box 13 and the transmission 14 introduces a new problem, that is, when the motor 9 drives actively, whether the output shaft of the mechanical rectifier 12 can be used as the input shaft.

[0060] If Figure 16The right output shaft 1218 serves as the input shaft. According to the characteristics of the one-way gear, the inner ring of the one-way gear can drive the outer ring to rotate only when the input shaft rotates counterclockwise. The process is as follows: The input shaft 1218 rotates counterclockwise, driving the inner ring of the upper one-way gear 1223 to rotate counterclockwise, thereby driving the outer ring of the upper one-way gear 1223 to rotate counterclockwise. Then the idler gear meshing with it will rotate clockwise. Since the large gear 1214 on the output shaft 1215 meshes with the idler gear 1207, the output shaft 1215 rotates counterclockwise; when the large gear 1214 on the output shaft 1215 rotates counterclockwise, it drives the outer ring of the lower one-way gear 1222 to rotate clockwise; at this time, the inner ring of the lower one-way gear 1222 rotates counterclockwise while the outer ring rotates clockwise, and it will be jammed. If the input shaft 1218 is disconnected between the upper one-way gear 1223 and the lower one-way gear 1222 and the engagement and disconnection are achieved through the clutch function device, reverse transmission can be realized. At this time, only by disconnecting the clutch function device, the lower one-way gear will rotate idly. When the clutch function device is engaged, the separated upper and lower shafts are an integral body. When the left shaft 1215 serves as the input shaft, its right output shaft 1218 can achieve single-direction motion output.

[0061] Disconnecting the right input shaft 1218 in the middle and connecting it to the clutch 10 function device can achieve reverse transmission. However, due to the characteristics of the one-way gear, when the right shaft 1218 serves as the input shaft and rotates clockwise, it will not drive the inner ring of the one-way gear to rotate. Eventually, only the float 1 can be actively controlled to rotate in one direction, which obviously does not meet the actual control requirements. Therefore, a two-way motion control can be achieved by locking the right upper half shaft and the outer ring of the one-way gear 1223 through a certain device, such as Figure 25 , as shown in Fig. 26. The locking ring 1227 is nested on the input shaft 1218, which can not only rotate synchronously with the input shaft 1218 but also move axially. When it is necessary to control the two-way rotation of the left output shaft 1215, the locking ring moves downward and fits with the corresponding hole of the outer ring of the one-way gear 1223. Then the input shaft 1218 is directly connected to the outer ring of the one-way gear 1223, and the upper one-way gear 1223 loses its one-way transmission function, realizing the two-way motion control of the output shaft 1215.

[0062] After making the above changes to the Figure 16 mechanical rectifier 12, the mechanical rectifier 12 can be placed between the transmission 14 and the bevel gearbox 13. The advantage of this is that the motor 9 can also generate electricity by rotating in a single direction of motion.

[0063] After the mechanical rectifier 12 changes its position, as shown in Figure 25 and Figure 26As shown, some changes also occur in its internal structure, which are as follows: the original output shaft 1218 is cut off and divided into an input-output shaft 1218 and an only-output shaft 1229; holes are drilled on the outer ring of the one-way gear 1223 for locking by the locking ring 1227; the locking ring 1227 is added to the input-output shaft 1218, and the locking ring 1227 rotates synchronously with the input-output shaft 1218; the locking ring 1227 can move axially along the input-output shaft 1218 under the action of the wire cable, the servo system 5 and the controller 4; the clutch device 1228 can realize the engagement and separation of the input-output shaft 1218 and the only-output shaft 1229 under the action of the controller 4.

[0064] When the input shaft 1215 receives the bidirectional movement from the transmission 14, the locking ring 1227 is separated from the one-way gear 1223, and the clutch device 1228 engages the input-output shaft 1218 and the only-output shaft 1229. At this time, the bidirectional movement can be converted into a unidirectional movement; when the input-output shaft 1218 receives the movement from the motor 9 to actively control the float 1, the locking ring 1227 meshes with the one-way gear 1223, and the clutch device 1228 separates the input-output shaft 1218 and the only-output shaft 1229, then the input shaft 1215 can realize the bidirectional movement output to control the movement of the float 1.

[0065] In the description of the present invention, it should be noted that unless otherwise specified, the meaning of "a plurality of" is two or more; the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0066] In the description of the present invention, it should also be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0067] As described above, it is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the said claims.

Claims

1. An efficient multi-motor wave energy conversion system for multiple sea conditions, characterized in that It includes a main box body, a float, and a power transmission device provided between the float and the main box body. A power conversion device and at least two generators are provided in the main box body. The generators are arranged circumferentially of the power conversion device and are drivingly connected to the power conversion device. The power conversion device adjusts the output power of each generator, and the power transmission device is drivingly connected to the power conversion device.

2. The high-efficiency multi-motor wave energy conversion system for multiple sea conditions according to claim 1, characterized in that The power transmission device includes a connecting rod, a first connection box, and a second connection box. The second connection box is fixedly provided above the float. The connecting rod is arranged between the first connection box and the second connection box and is rotatably connected to both the first connection box and the second connection box.

3. The high-efficiency multi-motor wave energy conversion system for multiple sea conditions according to claim 2, characterized in that The first connection box includes a lower first connection box, a middle first connection box, and an upper first connection box that are stacked and connected in sequence from bottom to top. The lower first connection box is connected to the main box body. A bearing is provided between the upper first connection box and the middle first connection box. An upper stepped shaft is installed on the bearing. One end of the upper stepped shaft is drivingly connected to a transmission through a coupling. A pin hole is also provided on the upper stepped shaft. The connecting rod is synchronously rotated with the upper stepped shaft by inserting a pin into the pin hole. A bearing end cover is provided on the outer end face of the bearing. The inner end of the bearing contacts the inner walls of the upper first connection box and the middle first connection box. The connection method between the middle first connection box and the lower first connection box is the same as that between the upper first connection box and the middle first connection box.

4. The high-efficiency multi-motor wave energy conversion system for multiple sea conditions according to claim 2, characterized in that The second connection box includes a lower second connection box, a middle second connection box, and an upper second connection box that are stacked and connected in sequence from bottom to top. The lower second connection box is connected to the float. An upper stepped shaft connected by a bearing is provided between the upper second connection box and the middle second connection box. The inner end of the bearing contacts the inner walls of the upper second connection box and the middle second connection box. A bearing end cover is provided at the outer end of the bearing. The end of the connecting rod is nested on the outer ring of the bearing and is axially positioned by a sleeve and the bearing end cover. The connection method between the middle second connection box and the lower second connection box is the same as that between the upper second connection box and the middle second connection box.

5. The high-efficiency multi-motor wave energy conversion system for multiple sea conditions according to any one of claims 2-4, characterized in that, The power conversion device includes a transmission, a mechanical rectifier, a bevel gear box, a differential, a brake, and a clutch. The power transmission device is drivingly connected to the transmission. The mechanical rectifier is provided between the bevel gear box and the differential or between the transmission and the bevel gear box and is drivingly connected at the same time. Both sides of the differential are drivingly connected to the generator through the brake. The bevel gear box is drivingly connected to the clutch through a coupling. The clutch is drivingly connected to the generator through a coupling. When the mechanical rectifier is provided between the bevel gear box and the differential, the generator connected to the clutch is set as a motor. The motor rotates reciprocally to generate electricity, and the generator connected to the differential rotates unidirectionally to generate electricity. When the mechanical rectifier is arranged between the transmission and the bevel gearbox, the generators connected to the clutch rotate unidirectionally to generate electricity, and the generators connected to the differential rotate unidirectionally to generate electricity.

6. The high-efficiency multi-motor wave energy conversion system for multiple sea conditions according to claim 5, wherein The power conversion device further includes a controller and a servo system. The controller is electrically connected to the differential through the servo system, and the controller is electrically connected to the brake and the clutch; when the float moves up and down with the waves, the connecting rod drives the stepped shaft of the first connection box to make small reciprocating swings, and transmits power to the transmission through a coupling, and the transmission amplifies the movement amplitude; When it is necessary to actively control the float, the controller controls the clutch to engage, and the transmission acts as a speed reducer, converting the high speed and low torque from the motor into low speed and high torque.

7. The high-efficiency multi-motor wave energy conversion system for multiple sea conditions according to claim 6, wherein The transmission includes a lower box body and an upper box body. The upper box body is located on the lower box body and is connected by bolts. The lower box body is fixed to the main box body by bolts; A stepped shaft and a stepped gear shaft are simultaneously arranged between the upper box body and the lower box body. When the stepped shaft is used as the input shaft, the transmission converts the low speed and large torque and small amplitude movement from the float into a large speed and small torque and large amplitude movement, driving the generator to generate electricity; When the stepped gear shaft is used as the input shaft, the transmission converts the high speed and large torque and large amplitude movement from the motor into a low speed and large torque and small amplitude movement to control the stable movement of the float.

8. The high-efficiency multi-motor wave energy conversion system for multiple sea conditions according to claim 5, characterized in that The bevel gearbox includes an upper box body and a lower box body connected by bolts. The lower box body is connected to the main box body by bolts. A first bevel gear shaft, a second bevel gear shaft and a third bevel gear shaft that mesh with each other are further arranged between the upper box body and the lower box body. The first bevel gear shaft, the second bevel gear shaft and the third bevel gear shaft are all nested with bearings; when the mechanical rectifier is arranged between the bevel gearbox and the differential, the end of the first bevel gear shaft is connected to the transmission through a coupling, the end of the second bevel gear shaft is connected to the mechanical rectifier through a coupling, and the end of the third bevel gear shaft is connected to the clutch through a coupling; when the mechanical rectifier is arranged between the bevel gearbox and the transmission, the end of the first bevel gear shaft is connected to the mechanical rectifier through a coupling, the end of the second bevel gear shaft is connected to the differential through a coupling, and the end of the third bevel gear shaft is connected to the clutch through a coupling; When the first bevel gear shaft receives power from the transmission or the mechanical rectifier, the first bevel gear shaft is the input shaft, and the second bevel gear shaft and the third bevel gear shaft are the output shafts, respectively transmitting power to the mechanical rectifier or the differential and the clutch; When the third bevel gear shaft receives power from the motor through the clutch, the third bevel gear shaft is the input shaft, and the first bevel gear shaft and the second bevel gear shaft are the output shafts, which respectively transmit power to the mechanical rectifier or the transmission and the differential or the mechanical rectifier.

9. The high-efficiency multi-motor wave energy conversion system for multiple sea conditions according to claim 8, wherein, When the motor acts as a generator, the controller controls the state of the clutch; When the motor moves passively, when the controller controls the clutch to engage, the motor acts as a generator, and when the controller controls the clutch to disengage, the motor is in an idle state; when the motor moves actively, the controller controls the clutch to engage to control the movement of the float.

10. The high-efficiency multi-motor wave energy conversion system for multiple sea conditions according to claim 8, wherein The differential includes a lower box body and an upper box body. The lower box body is connected to the main box body by bolts, and also includes a left output gear shaft and a right output gear shaft. The brake controls the rotation of the left output gear shaft and the right output gear shaft; When the controller makes the brake connected to the left output gear shaft in an open state, the left output gear shaft stops rotating and the large generator does not generate electricity; when the controller makes the brake connected to the right output gear shaft in an open state, the right output gear shaft stops rotating and the small generator does not generate electricity; when the brake is in an open state, the differential lock block cannot be opened.

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