High-efficiency multi-motor wave energy conversion system for multiple sea states

Abstract

The application provides a multi-sea-state efficient multi-motor wave energy conversion system, 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, the generators are arranged in the circumferential direction of the power conversion device and are drivingly connected with the power conversion device, the power conversion device adjusts the output power of each generator, and the power transmission device is drivingly connected with the power conversion device.The wave energy conversion system of the application comprises multiple generators, the starting torque of different generators is different, compared with a single generator, when the driving force of waves is small, the single generator does not generate electricity, when the driving capacity of waves exceeds the rated power of the single generator, the single generator may be overloaded or keep the maximum output power through an adjusting means, and the configuration of multiple different generators of the application can fully utilize various sea state resources and improve the power generation efficiency of the wave energy conversion system.

Description

Technical Field

[0001] This invention relates to the field of clean energy equipment technology, and in particular to a high-efficiency multi-motor wave energy conversion system for various sea conditions. Background Technology

[0002] Wave energy is a widely distributed, abundant, and inexhaustible renewable and clean energy source. Based on global wind and wave models verified and calibrated using satellite altimeter data and buoy data from the World Ocean Wave Database, the estimated global annual wave energy is 32,000 TWh. Fully utilizing this energy will be of great significance to global environmental protection. It manifests as mechanical energy and is characterized by high energy density and high energy grade. Investing human, material, and financial resources in the development and utilization of wave energy is of great significance in solving the increasingly serious problems of environmental pollution and energy shortages, and can also provide an ideal power source for marine resource exploration and development equipment.

[0003] Wave energy conversion devices can be classified into three types according to their physical design and working principle: oscillating body type, oscillating water column type, and wave-overtaking 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 size, and strong adaptability.

[0004] However, most oscillating wave energy conversion devices only have one motor, which is not flexible enough, has 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 a high-efficiency multi-motor wave energy conversion system for various sea conditions, so as to solve the technical problems of existing oscillating wave energy conversion devices having only one motor, which are not flexible in configuration, have low power generation efficiency, and cannot fully utilize wave energy resources.

[0006] To achieve the above objectives, the present invention provides a high-efficiency multi-motor wave energy conversion system for various sea states, including a main tank, a float, and a power transmission device disposed between the float and the main tank. The main tank is equipped with the power conversion device and at least two generators. The generators are located around the circumference of the power conversion device and are drivenly connected to the power conversion device. The power conversion device adjusts the output power of each of the generators, and the power transmission device is drivenly connected to the power conversion device.

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

[0008] Optionally, the first connecting box includes a first connecting box lower, a first connecting box middle, and a first connecting box upper, which are stacked and connected sequentially from bottom to top. The first connecting box lower is connected to the main box body. A bearing is provided between the first connecting box upper and the first connecting box middle. An upper stepped shaft is installed on the bearing. One end of the upper stepped shaft is connected to the gearbox drive via a coupling.

[0009] The upper stepped shaft is also provided with a pin hole, and the connecting rod rotates synchronously with the upper stepped shaft by inserting a pin into the pin hole;

[0010] A bearing end cap is provided on the outer end face of the bearing, and the inner end of the bearing is in contact with the inner wall of the first connecting box and the first connecting box.

[0011] The connection method between the first connecting box and the bottom of the first connecting box is the same as the connection method between the top of the first connecting box and the inside of the first connecting box.

[0012] Optionally, the second connecting box includes a second connecting box lower, a second connecting box middle, and a second connecting box upper, which are stacked and connected sequentially from bottom to top. The second connecting box lower is connected to the float. An upper stepped shaft is provided between the second connecting box upper and the second connecting box middle through a bearing. The inner end of the bearing contacts the inner wall of the second connecting box upper and the second connecting box middle. The outer end of the bearing is provided with a bearing end cap.

[0013] The end of the connecting rod is nested on the outer ring of the bearing and is axially positioned by the sleeve and the bearing end cap;

[0014] The connection method between the second connecting box and the bottom of the second connecting box is the same as the connection method between the top of the second connecting box and the inside of the second connecting box.

[0015] Optionally, the power conversion device includes a transmission, a mechanical rectifier, a bevel gearbox, a differential, a brake, and a clutch. The power transmission device is driven and connected to the transmission. The mechanical rectifier is located between the bevel gearbox and the differential, or between the transmission and the bevel gearbox, and is simultaneously driven and connected. The two sides of the differential are driven and connected to the generator through the brake. The bevel gearbox and the clutch are driven and connected through a coupling. The clutch is driven and connected to the generator through a coupling.

[0016] When the mechanical rectifier is located between the bevel gearbox and the differential, the generator connected to the clutch is a motor that generates electricity by reciprocating rotation, and the generator connected to the differential generates electricity by unidirectional rotation.

[0017] When the mechanical rectifier is located between the transmission and the bevel gearbox, the generator connected to the clutch rotates in one direction to generate electricity, and the generator connected to the differential rotates in one direction to generate electricity.

[0018] Optionally, the power conversion device further includes a controller and a servo system, wherein the controller is electrically connected to the differential via the servo system, and the controller is electrically connected to the brake and the clutch.

[0019] Optionally, when the float moves up and down with the waves, the connecting rod drives the stepped shaft of the first connecting box to swing back and forth in a small amplitude, and transmits the power to the gearbox through the coupling, and the gearbox amplifies the amplitude of the movement;

[0020] When active control of the float is required, the controller controls the clutch to engage, and the transmission acts as a reducer, converting the high-speed, low-torque output from the electric motor into a low-speed, high-torque output.

[0021] Optionally, the transmission includes a lower housing and an upper housing, the upper housing being located on the lower housing and connected by bolts, and the lower housing being fixed to the main housing by bolts;

[0022] A stepped shaft and a stepped gear shaft are provided between the upper housing and the lower housing. When the stepped shaft is used as the input shaft, the transmission converts the low speed and small amplitude motion with high torque from the float into high speed and large amplitude motion with low torque, thereby driving the generator to generate electricity.

[0023] When the stepped gear shaft is used as the input shaft, the transmission converts the high speed and large amplitude of the small torque from the electric motor into the low speed and small amplitude of the large torque to control the stable movement of the float.

[0024] Optionally, the bevel gearbox includes an upper housing and a lower housing bolted together. The lower housing is bolted to the main housing. A first bevel gear shaft, a second bevel gear shaft, and a third bevel gear shaft are also provided between the upper housing and the lower housing, and all three shafts are fitted with bearings. When the mechanical rectifier is located between the bevel gearbox and the differential, the end of the first bevel gear shaft is connected to the transmission via a coupling, the end of the second bevel gear shaft is connected to the mechanical rectifier via a coupling, and the end of the third bevel gear shaft is connected to the clutch via a coupling. When the mechanical rectifier is located between the bevel gearbox and the transmission, the end of the first bevel gear shaft is connected to the mechanical rectifier via a coupling, the end of the second bevel gear shaft is connected to the differential via a coupling, and the third bevel gear shaft is connected to the clutch via a coupling.

[0025] 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 and third bevel gear shafts are the output shafts, respectively transmitting power to the mechanical rectifier or the differential and the clutch;

[0026] When the third bevel gear shaft receives power from the electric 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, respectively transmitting power to the mechanical rectifier or the transmission and the differential or the mechanical rectifier.

[0027] Optionally, when the electric motor functions as a generator, the controller controls the state of the clutch;

[0028] When the motor moves passively, the motor acts as a generator when the controller engages the clutch; when the controller disengages the clutch, the motor is idle. When the motor moves actively, the controller engages the clutch to control the movement of the float.

[0029] Optionally, the differential includes a lower housing and an upper housing, the lower housing being connected to the main housing by bolts, and also includes a left output gear shaft and a right output gear shaft, with a brake controlling the rotation of the left output gear shaft and the right output gear shaft;

[0030] When the controller opens the brake connected to the left output gear shaft, the left output gear shaft stops rotating and the large generator stops generating electricity; when the controller opens the brake connected to the right output gear shaft, the right output gear shaft stops rotating and the small generator stops generating electricity; when the brake is open, the differential lock block cannot be opened.

[0031] The high-efficiency multi-motor wave energy conversion system for various sea states provided by this invention has the following technical advantages:

[0032] This high-efficiency multi-motor wave energy conversion system for various sea states mainly consists of a main tank, a float, and a power transmission device located between the float and the main tank. The main tank houses the power conversion device and at least two generators. The generators are located around the circumference of the power conversion device and are driven by it. The power conversion device regulates the output power of each generator. The power transmission device is driven by the power conversion device. The wave energy conversion system of this invention includes multiple generators with different starting torques. Compared to a single generator, when the wave driving force is small, a single generator does not rotate to generate electricity. When the wave driving force exceeds the rated power of a single generator, the single generator may be overloaded or maintain maximum output power through adjustment. However, this invention uses a configuration of multiple different generators, which can make full use of various sea state resources and improve the power generation efficiency of the wave energy conversion system. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of a preferred embodiment of the high-efficiency multi-motor wave energy conversion system for various sea conditions of the present invention;

[0035] Figure 2 This is a three-dimensional structural schematic diagram of another preferred embodiment of the high-efficiency multi-motor wave energy conversion system for various sea conditions of the present invention;

[0036] Figure 3 yes Figure 2 A top view of a high-efficiency multi-motor wave energy conversion system for various sea conditions;

[0037] Figure 4 yes Figure 1 or Figure 2 Alternating views of a high-efficiency multi-motor wave energy conversion system for various sea conditions;

[0038] Figure 5 yes Figure 1 or Figure 2 A schematic diagram of the power transmission device of a high-efficiency multi-motor wave energy conversion system for various sea conditions.

[0039] Figure 6 yes Figure 5 Front view of the power transmission device;

[0040] Figure 7 yes Figure 5Top view of part of the internal structure of the power transmission device;

[0041] Figure 8 yes Figure 7 A cross-sectional view along the AA direction;

[0042] Figure 9 yes Figure 7 A cross-sectional view along the BB direction;

[0043] Figure 10 yes Figure 1 or Figure 2 A schematic diagram of the gearbox structure of a high-efficiency multi-motor wave energy conversion system for various sea conditions;

[0044] Figure 11 yes Figure 10 Internal structure diagram of the transmission;

[0045] Figure 12 yes Figure 1 or Figure 2 A schematic diagram of the bevel gearbox of a high-efficiency multi-motor wave energy conversion system for various sea conditions;

[0046] Figure 13 yes Figure 12 Internal structure diagram of a bevel gearbox;

[0047] Figure 14 yes Figure 1 A schematic diagram of the mechanical rectifier of a high-efficiency multi-motor wave energy conversion system for various sea conditions;

[0048] Figure 15 yes Figure 14 Cross-sectional view of the mechanical rectifier along the AA direction;

[0049] Figure 16 yes Figure 14 Cross-sectional view of the mechanical rectifier along the BB direction;

[0050] Figure 17 yes Figure 14 Main schematic diagram of a mechanical rectifier;

[0051] Figure 18 yes Figure 14 Top view schematic diagram of a mechanical rectifier;

[0052] Figure 19 yes Figure 14 Another schematic diagram of the structural principle of the mechanical rectifier;

[0053] Figure 20 yes Figure 14 Another schematic diagram of the structural principle of a mechanical rectifier;

[0054] Figure 21 yes Figure 1 or Figure 2 A schematic diagram of the differential in a high-efficiency multi-motor wave energy conversion system for various sea conditions.

[0055] Figure 22 yes Figure 21 Cross-sectional view of the center differential along the AA direction;

[0056] Figure 23 yes Figure 21 Schematic diagram of the center differential;

[0057] Figure 24 yes Figure 21 A schematic diagram of the principle of a center differential from another angle;

[0058] Figure 25 yes Figure 14 A cross-sectional view of another embodiment of the mechanical rectifier along the BB direction;

[0059] Figure 26 yes Figure 25 Schematic diagram of the mechanical rectifier.

[0060] in, Figures 1-26 :

[0061] 1. Float;

[0062] 2. Power transmission device; 21. First connecting box; 211. Lower part of the first connecting box; 212. Middle part of the first connecting box; 213. Lower stepped shaft; 214. Upper stepped shaft; 215. Bearing end cover; 216. Upper part of the first connecting box; 217. Pin; 218. Bearing; 22. Connecting rod; 23. Second connecting box; 231. Upper part of the second connecting box; 232. Middle part of the second connecting box; 233. Lower part of the second connecting box; 234. Bearing end cover; 235. Bearing; 236. Sleeve; 237. Bearing end cover; 238. Bearing; 239. Upper stepped shaft;

[0063] 3. Large generator; 4. Controller; 5. Servo system; 6. Brake;

[0064] 7. Differential; 701. Lower gearbox; 702. Steel cable; 703. Differential lock lever; 704. Differential lock block; 705. Differential lock ring; 706. Upper gearbox; 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 frame; 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 Frame; 724, Bearing End Cover; 725, Bearing; 726, Side Gear; 727, Bearing; 728, Bearing; 729, Bearing End Cover; 730, Side Gear Frame; 731, Bearing; 732, Bearing End Cover; 733, Input Gear Shaft;

[0065] 8. Small generator; 9. Generator (electric motor); 10. Clutch; 11. Coupling;

[0066] 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. Locking ring; 1228. Clutch assembly; 1229. Output shaft;

[0067] 13. Bevel gearbox; 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;

[0068] 14. Gearbox; 1401. Lower housing; 1402. Upper housing; 1403. Stepped gear shaft; 1404. Bearing end cover; 1405. Bearing; 1406. Bearing end cover; 1407. Bearing; 1408. Sleeve; 1409. Intermediate stepped shaft pinion; 1410. Intermediate stepped shaft gear; 1411. Sleeve; 1412. Bearing; 1413. Bearing; 1414. Bearing end cover; 1415. Bearing end cover; 1416. Stepped shaft; 1417. Bearing end cover; 1418. Bearing; 1419. Sleeve; 1420. Gear; 1421. Bearing; 1422. Bearing end cover; 1423. Intermediate stepped shaft;

[0069] 15. Main box. Detailed Implementation

[0070] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described in detail below. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0071] Based on the defects described in the background art, the following section, in conjunction with specific appendices, Figure 1-26 The present invention provides a detailed description of the efficient multi-motor wave energy conversion system for various sea conditions.

[0072] like Figure 1 and Figure 2 The diagram shows the structure of the high-efficiency multi-motor wave energy conversion system for various sea states according to the present invention. This high-efficiency multi-motor wave energy conversion system for various sea states includes a main housing 15, a float 1, and a power transmission device 2 disposed between the float 1 and the main housing 15. The main housing 15 is equipped with the power conversion device and at least two generators. The generators are located around the circumference of the power conversion device and are driven and connected to the power conversion device. The power conversion device adjusts the output power of each generator. The power transmission device 2 is driven and connected to the power conversion device.

[0073] The wave energy conversion system of the present invention includes multiple generators with different starting torques. Compared with a single generator, when the driving force of the wave is small, a single generator will not rotate to generate electricity. When the driving force of the wave exceeds the rated power of a single generator, the single generator may be overloaded or maintain maximum output power through adjustment. The present invention uses a configuration of multiple different generators, which can make full use of various sea conditions and improve the power generation efficiency of the wave energy conversion system.

[0074] As a preferred embodiment, such as Figure 5-9As shown, the power transmission device 2 includes a connecting rod 22, a first connecting box 21 and a second connecting box 23. The second connecting box 23 is fixedly disposed above the float 1. The connecting rod 22 is disposed between the first connecting box 21 and the second connecting box 23, and is rotatably connected to both the first connecting box 21 and the second connecting box 23. The second connecting box 23 is connected to the float 1.

[0075] The connecting rod 22 in this embodiment includes four rods, which are spaced a certain distance apart and extend along the axial direction to form a structure with a parallelogram cross section. The float 1 can maintain the same direction as the main box 15.

[0076] Since the second connecting box 23 is connected to the float 1, the second connecting box 23 serves as a connection on the one hand, and provides gravity for the ballast liquid surface of the float 1 on the other hand.

[0077] When the float 1 swings with the wave, the float 1 always maintains the same direction as the main body 15. The first connecting box is fixed on the main body 15, and the second connecting box is connected to the float 1 by bolts.

[0078] Among them, such as Figure 5-9 As shown, the first connecting box includes a first connecting box lower 211, a first connecting box middle 212, and a first connecting box upper 216 stacked and connected from bottom to top. The first connecting box lower 211 is connected to the main box body 15. A bearing 218 is provided between the first connecting box upper 216 and the first connecting box middle 212. An upper stepped shaft 214 is mounted on the bearing 218. One end of the upper stepped shaft 214 is driven to be connected to the gearbox 14 through a coupling 11. The upper stepped shaft 214 is also provided with a pin 217 hole. The connecting rod is inserted into the pin 217 hole through the pin 217 and rotates synchronously with the upper stepped shaft 214. A bearing end cover 215 is provided on the outer end face of the bearing 218. The inner end of the bearing 218 is in contact with the inner wall of the first connecting box upper 216 and the first connecting box middle 212.

[0079] The connection method between the first connecting box 212 and the lower 211 is the same as the connection method between the upper 216 and the middle 212 of the first connecting box. That is, the configuration of the lower stepped shaft 213, bearing 218, pin 217, etc. between the first connecting box 212 and the lower 211 is the same as that between the upper 216 and the middle 212 of the first connecting box.

[0080] Furthermore, the second connecting box 23 includes a second connecting box upper 231, a second connecting box middle 232, and a second connecting box lower 233 stacked from top to bottom and connected by bolts. The second connecting box lower 233 is connected to the float 1 by bolts. An upper stepped shaft 239 is provided between the second connecting box upper 231 and the second connecting box middle 232 through bearings 235 and 238. The inner ends of the bearings 235 and 238 are in contact with the inner walls of the second connecting box upper 231 and the second connecting box middle 232. The outer ends of the bearings 235 and 238 are provided with bearing end caps 234 and 237, which are used to achieve axial positioning. The end of the connecting rod is nested on the outer ring of the bearing 235. The bearing 235 is axially positioned through the sleeve 236 and the bearing end caps 234 and 237.

[0081] The connection method between the second connecting box 232 and the second connecting box lower 233 is the same as the connection method between the second connecting box upper 231 and the second connecting box 232. That is, there is a lower stepped shaft between the second connecting box 232 and the second connecting box lower 233, and the configuration of bearings 235, 238, etc. is the same as that of the second connecting box upper 231 and the second connecting box 232.

[0082] In one preferred embodiment, the power conversion device includes a transmission 14, a mechanical rectifier 12, a bevel gearbox 13, a differential 7, a brake 6, and a clutch 10. The power transmission device 2 is driven to the transmission 14. The mechanical rectifier 12 is located between the bevel gearbox 13 and the differential 7, or between the transmission 14 and the bevel gearbox 13, and is driven to both. The differential 7 is driven to the generator 3 and the generator 8 on both sides through the brake 6. The bevel gearbox 13 is driven to the clutch 10 through a coupling 11. The clutch 10 is driven to the generator 9 through the coupling 11.

[0083] When the mechanical rectifier 12 is located between the bevel gearbox 13 and the differential 7, the generator connected to the clutch 10 is a motor 9. That is, the motor 9 can be used for both power generation and active motion control. The motor 9 generates power by reciprocating rotation, while the generators 3 and 8 connected to the differential 7 generate power by unidirectional rotation.

[0084] When the mechanical rectifier 12 is located between the transmission 14 and the bevel gearbox 13, the generator 9 connected to the clutch 10 rotates to generate electricity in one direction, and the generators 3 and 8 connected to the differential 7 rotate to generate electricity in one direction.

[0085] In addition, the power conversion device also includes a controller 4 and a servo system 5. The controller 4 is electrically connected to the differential 7 through the servo system 5, and the controller 4 is electrically connected to the brake 6 and the clutch 10.

[0086] In this embodiment, the transmission 14 serves 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 connecting box to swing back and forth in a small amplitude, and transmits the power to the transmission 14 through the coupling 11. The transmission 14 amplifies the amplitude of the movement. When it is necessary to actively control the float 1, the transmission 14 acts as a reducer, converting the high speed and low torque from the electric motor 9 into low speed and high torque.

[0087] Specifically, such as Figure 10 and Figure 11 As shown, the transmission 14 consists of a lower housing 1401, an upper housing 1402, and numerous gears, bearings, and other components. The upper housing 1402 and the lower housing 1401 are connected by bolts, and the lower housing 1401 is fixed to the main housing 15 by bolts. The bearing end cover 1422 is bolted to the upper housing 1402 and the lower housing 1401 to achieve 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 is axially positioned with the rear end of the front bearing 1421 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 tightly attached to the sleeve 1419, and the other end is axially positioned by the bearing end cover 1417; the stepped shaft 1416 is connected to the upper stepped shaft 214 in the first connecting box 21 of the power transmission device 2 through the coupling 11.

[0088] The intermediate stepped shaft 1423 is fitted with an intermediate stepped shaft pinion 1409 and an intermediate stepped shaft large gear 1410 that rotate synchronously with it; the axial positioning of bearings 1407, 1413, intermediate stepped shaft pinion 1409 and intermediate stepped shaft large gear 1410 is achieved by the shaft shoulder, sleeve 1408, sleeve 1411, bearing end cover 1406 and bearing end cover 1415 of the intermediate stepped shaft 1423; the intermediate stepped shaft pinion 1409 meshes with the large gear 1420.

[0089] The stepped gear shaft 1403 relies on its shoulder, bearing end cover 1404 and bearing end cover 1414 to achieve axial positioning of bearing 1405 and bearing 1412; the gear 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.

[0090] When the stepped shaft 1416 is used as the input shaft, the transmission 14 converts the low speed and small amplitude motion with high torque from the float 1 into high speed and large amplitude motion with low torque, thereby driving the large generator 3, the small generator 8 and the generator (motor) 9 to generate electricity; when the stepped gear shaft 1403 is used as the input shaft, the transmission 14 converts the high speed and large amplitude motion with low torque from the motor 9 into low speed and small amplitude motion with high torque, thereby controlling the stable motion of the float 1.

[0091] As a preferred embodiment, such as Figure 12 and Figure 13 As shown, the bevel gearbox 13 consists of two parts: an upper housing 1302 and a lower housing 1301, which are bolted together. The lower housing 1301 is connected to the main housing 15 by bolts. Bearing end caps 1303, 1307, and 1309 work together with the upper housing 1302 and the lower housing 1301 to achieve axial positioning of 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 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 connected to the transmission 14 or the mechanical rectifier 12, the mechanical rectifier 12 or the differential 7, and the clutch 10 respectively through the coupling 11.

[0092] 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, respectively transmitting 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 electric 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, respectively transmitting power to the mechanical rectifier 12 or the transmission 14 and the differential 7 or the mechanical rectifier 12; through the controller 4, the electric motor 9 can transmit power to the gear shaft 1304 through the clutch 10, and then sequentially through the transmission 14 or the mechanical rectifier 12 and the first connecting box of the transmission 14 and the power transmission device 2, finally realizing the motion control of the float 1.

[0093] In a preferred embodiment, the clutch 10 has two states: engaged and disengaged. When the motor 9 acts as a generator, the controller 4 controls the state of the clutch 10. When the controller 4 controls the clutch 10 to engage, the motor 9 acts as a generator. When the controller 4 controls the clutch 10 to disengage, the motor 9 is in an idle state. When the motor 9 moves actively, the controller 4 controls the clutch 10 to engage in order to control the movement of the float 1.

[0094] As a preferred embodiment, such as Figure 14 , 15 As shown in Figure 16, the mechanical rectifier 12 consists of three parts: a lower housing 1201, a middle housing 1202, and an upper housing 1203, which are connected by bolts. The lower housing 1201 is connected to the main housing 15 by bolts. The intermediate shaft 1206 is located between the upper housing 1203 and the middle housing 1202. Bearings 1205 and 1209 are nested at both ends of the intermediate shaft 1206, and their axial positioning at one end is achieved by the shoulder of the intermediate shaft 1206. The other ends of bearings 1205 and 1209 are axially positioned by bearing end caps 1204 and 1210, which are screwed to the upper housing 1203 and the middle housing 1202. The idler wheel 1207 is nested on the intermediate shaft 1206 and rotates synchronously with the intermediate shaft 1206. One end of the idler wheel 1207 is axially positioned by the shoulder, and the sleeve 1208 achieves axial positioning at the other end of the idler wheel 1207.

[0095] Input shaft 1215 and output shaft 1218 are located between the middle housing 1202 and the lower housing 1201, respectively, and are connected to the second bevel gear shaft 1306 and the input gear shaft 733 of the differential 7 via coupling 11. Bearings 1212 and 1216 are nested at both ends of the input shaft 1215, with one end axially positioned by the shaft shoulder; the other end of bearings 1212 and 1216 is axially positioned by bearing end caps 1211 and 1217, which are screwed to the middle housing 1202 and the lower housing 1201. Large gear 1214 is nested on the input shaft 1215 and rotates synchronously with the input shaft 1215; one end of the large gear 1214 is axially positioned by the shaft shoulder of the input shaft 1215, while the sleeve 1213 provides axial positioning for the other end; the large gear 1214 meshes with the idler gear 1207.

[0096] Bearings 1220 and 1225 are nested at both ends of the output shaft 1218, with one end axially positioned by the shaft shoulder. The other ends of bearings 1220 and 1225 are axially positioned by bearing end caps 1219 and 1226, which are screwed to the middle housing 1202 and the lower housing 1201. One end of one-way gears 1222 and 1223 is positioned by the shaft shoulder of the output shaft 1218, while the other end is axially positioned by sleeves 1221 and 1224, respectively. One-way gear 1222 meshes with the large gear 1214, and 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 unidirectional rotation of the output shaft 1218.

[0097] When the mechanical rectifier 12 is located between the bevel gearbox 13 and the differential 7, the generator connected to the clutch 10 is a motor 9. The motor 9 generates electricity by reciprocating rotation, while the generator connected to the differential 7 generates electricity by unidirectional rotation. Figure 1 As shown.

[0098] In this embodiment, the mechanical rectifier 12 converts the input reciprocating motion into the output unidirectional motion, such as... Figure 17 and Figure 18 As shown, its principle is as follows:

[0099] The input shaft 1215 reciprocates 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 directly meshes with the outer ring of the lower one-way gear 1222 and indirectly meshes with the outer ring of the upper one-way gear 1223 through the idler gear 1207. Therefore, the outer rings of the upper and lower one-way gears 1223 are always in opposite directions of rotation. For one-way transmission gears, it can be seen that when the outer ring of the one-way gear 1223 rotates counterclockwise, the inner ring of the one-way gear 1223 does not move because the output shaft 1218 is connected to a load, and therefore the output shaft 1218 does not rotate. When the outer ring of the one-way gear 1223 rotates clockwise, it will drive its inner ring to rotate, which in turn drives 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 case, when the input shaft 1215 reciprocates, with only the upper one-way gear 1223 and the idler gear 1207 present, the output shaft 1218 will only rotate clockwise. Specifically, when the input shaft 1215 rotates clockwise, the output shaft 1218 rotates clockwise; when the input shaft 1215 rotates counterclockwise, the output shaft 1218 does not rotate. When only the lower one-way gear 1222 is present, the one-way gear 1222 directly meshes with the large gear 1214, and the direction of rotation is not further changed. Therefore, when the input shaft 1215 rotates counterclockwise, the lower one-way gear 1222 will drive the output shaft 1218 to rotate clockwise.

[0100] Therefore, when two one-way gears 1222 and 1223 are present, the output shaft 1218 always moves in one direction regardless of how the input shaft 1215 rotates. 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 rotate the output shaft 1218 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. The entire system operates smoothly and will not jam.

[0101] 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 rotate the output shaft 1218 clockwise. At this time, the inner ring of the upper one-way gear 1223 also rotates clockwise while the outer ring rotates counterclockwise, so it will not jam.

[0102] In addition to the structure described above, 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, during the reciprocating motion of the input shaft 1215, the outer rings of the one-way gear and the one-way pulley always rotate in opposite directions, and one of them will always drive the output shaft 1218 to rotate; as Figure 20 As shown, when the gear ring acts as the input shaft 1215 and reciprocates, since the number of gears between the two one-way gears and the gear ring is different, no matter how the gear ring moves, the outer rings of the two one-way gears in the middle always move in opposite directions, and one of them will always drive the output shaft 1218 to move.

[0103] As a preferred embodiment, such as Figure 21As shown, the differential 7 is externally composed 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, which is connected to the mechanical rectifier 12 or the bevel gearbox 13 via a 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 tightly attached to the inner wall of the lower housing 701 and the upper housing 706, while 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 is axially positioned on the other side by a sleeve 707 that fits against the main gear 713; the left output gear shaft 708 passes through a bearing 710 and is connected to the brake 6; the bearing 710 is axially positioned by a 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, which rotates synchronously with the left output gear shaft 708; The differential lock block 704 is divided into left and right halves, which are bolted together and can be nested on the differential lock ring 705, but do not rotate synchronously with the differential lock ring 705. The differential lock lever 703 can rotate around its middle part, and its upper end can slide on the differential lock block 704. The lower end is connected to a tension spring and a steel cable 702. Under normal conditions, under the tension of the tension spring, the differential lock lever 703 tilts to the left, thereby causing the differential lock block 704 to pull 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 steel cable 702 to engage the differential lock ring 705 with the main gear 713, locking the differential lock. At this time, the main gear 713 rotates synchronously with the left output gear shaft 708. The main gear 713 is nested on the bearing 711 on the left, while its right end meshes with the input gear shaft 733. The right end of the bearing 711 is in close contact with the upper housing 706 and the lower housing 701, while the left end is axially positioned by the bearing end cover 712. The side gear frame 714 and the side gear frame 730 are bolted to the main gear 713. The side shaft 719 is connected between the two frames by bearings 716 and 728. The outer sides of the bearings 716 and 728 are axially positioned by the bearing end covers 715 and 729. The side shaft 719 also has side gears 718 and 726 connected by bearings 717 and 727. Both side gears 718 and 726 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.The right frame 723 is connected to the side gear frame 714 and side gear frame 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 frame 723 by the bearing 720, and its left side meshes with the side gears 718 and 726, while 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 frame 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.

[0104] Under the control of controller 4, differential 7 can realize the power generation configuration of generators 3 and 8 under different sea conditions, so as to expand the range of wave energy utilization.

[0105] Its 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, a side gear 718 and its frame, and a side gear 726 and its frame. The input gear shaft 733 receives unidirectional motion from the mechanical rectifier 12 or the bevel gearbox 13, thereby driving the main gear 713 to rotate. The side gear frame 714 and the side gear frame 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 rotate, 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 also rotate on their own axis while rotating around the axis, thereby enabling the other side to output 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 axis while rotating around the axis, thereby achieving different 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 a spline 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, under the action of the steel cable 702 and the spring, can move the differential lock block 704. Therefore, the differential lock block 704 can drive the differential lock ring 705 along the left output gear shaft 722. The axle 708 moves axially; the inner left side of the main gear 713 has a structure similar to a spline sleeve; therefore, under the action of the differential lock ring 705, differential lock block 704, differential lock lever 703, steel cable 702, and spring, the differential lock ring 705 can either move to the right to nest 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, allowing the left output gear shaft 708 to rotate 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 speed as the left output gear shaft 708.

[0106] In this embodiment, the brake 6 controls the rotation of the left output gear shaft 708 and the right output gear shaft 722. When the controller 4 opens the brake 6 connected to the left output gear shaft 708, the left output gear shaft stops rotating, and the large generator 3 does not generate electricity. When the controller 4 opens the brake 6 connected to the right output gear shaft 722, the right output gear shaft 722 stops rotating, and the small generator 8 does not generate electricity. When the brake 6 is open, the differential lock block 704 cannot be disengaged.

[0107] In this embodiment, the large generator 3 and the small generator 8 are configured differently, both for generating electricity. The wave energy driving capability varies under different sea conditions. The operation of these two generators can be controlled by the controller 4, the servo system 5, and the brake 6 to fully extract wave energy.

[0108] The large generator 3, small generator 8, and motor 9 have the following power generation configuration. The term "faster speed" in the table is because brake 6 locks one side, and side gears 718 and 726 rotate on their own axes while revolving around the central axis, causing the speed at the other end to increase. Specific control details are shown in Table 1.

[0109] Table 1. Power generation configuration of large generator 3, small generator 8, and electric motor 9.

[0110]

[0111] The high-efficiency multi-motor wave energy conversion system of the present invention, designed for various sea states, allows for unidirectional rotation of the generator connected to the clutch 10 and the generator connected to the differential 7 to generate electricity when the mechanical rectifier 12 is positioned between the transmission 14 and the bevel gearbox 13. For example, the generator connected to the clutch 10 generates electricity in one direction only, and the generator connected to the differential 7 also generates electricity in one direction only. Figure 2 As shown.

[0112] Since the mechanical rectifier 12 is located between the bevel gearbox 13 and the differential 7, when the wave-driven float 1 generates electricity, the large generator 3 and the small generator 8 can rotate in one direction, while the electric motor 9 rotates reciprocally to generate electricity. If the mechanical rectifier 12 is placed between the bevel gearbox 13 and the transmission 14, the electric motor 9 will also rotate in one direction to generate electricity. However, placing the mechanical rectifier 12 between the bevel gearbox 13 and the transmission 14 introduces a new problem: when the electric motor 9 is actively driven, can the output shaft of the mechanical rectifier 12 be used as the input shaft?

[0113] If Figure 16The right-side output shaft 1218 serves as the input shaft. Based on the characteristics of one-way gears, the input shaft must rotate counter-clockwise for the inner ring of the one-way gear to drive the outer ring to rotate. The process is as follows: The input shaft 1218 rotates counter-clockwise, causing the inner ring of the upper one-way gear 1223 to rotate counter-clockwise, which in turn causes the outer ring of the upper one-way gear 1223 to rotate counter-clockwise. The idler gear meshing with it will then rotate clockwise. Since the large gear 1214 on the output shaft 1215 meshes with the idler gear 1207, the output shaft 1215 rotates counter-clockwise. The counter-clockwise rotation of the large gear 1214 on the output shaft 1215 then causes the outer ring of the lower one-way gear 1222 to rotate clockwise. At this point, the inner ring of the lower one-way gear 1222 rotates counter-clockwise while the outer ring rotates clockwise, causing it to jam. If the input shaft 1218 is disconnected between the upper one-way gear 1223 and the lower one-way gear 1222, and engagement and disengagement are achieved through a clutch mechanism, reverse transmission can be achieved. In this case, simply disengaging the clutch mechanism will cause the lower one-way gear to idle. When the clutch mechanism is engaged, the two separated shafts form a single unit. When the left shaft 1215 acts as the input shaft, its right output shaft 1218 can achieve unidirectional motion output.

[0114] Disconnecting the right input shaft 1218 from 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 rotates clockwise as an input shaft, it will not drive the inner ring of the one-way gear to rotate. Therefore, it can only actively control the float 1 to rotate in one direction, which obviously does not meet the actual control requirements. Therefore, a device can be used to lock the right upper shaft to the outer ring of the one-way gear 1223 to achieve bidirectional motion control, such as... Figure 25 As shown in Figure 26, the locking ring 1227 is nested on the input shaft 1218, allowing it to rotate synchronously with the input shaft 1218 and move axially. When it is necessary to control the bidirectional rotation of the left output shaft 1215, the locking ring moves downward and engages with the corresponding hole on the outer ring of the one-way gear 1223. The input shaft 1218 then directly connects to the outer ring of the one-way gear 1223, causing the upper one-way gear 1223 to lose its unidirectional transmission function, thus achieving bidirectional motion control of the output shaft 1215.

[0115] In the Figure 16 After the above modifications are made to the mechanical rectifier 12, it can be placed between the gearbox 14 and the bevel gearbox 13. The advantage of this is that the electric motor 9 can also generate electricity by rotating in a single direction of motion.

[0116] After the mechanical rectifier 12 is repositioned, such as Figure 25 and Figure 26As shown, its internal structure has also undergone some changes, specifically as follows: the original output shaft 1218 is cut off and divided into two parts: the input-output shaft 1218 and the output-only shaft 1229; a hole is 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 steel wire cable, the servo system 5 and the controller 4; the clutch device 1228 can realize the engagement and disengagement of the input-output shaft 1218 and the output-only shaft 1229 under the action of the controller 4.

[0117] When the input shaft 1215 receives bidirectional motion from the transmission 14, the locking ring 1227 disengages from the one-way gear 1223, and the clutch device 1228 engages the input / output shaft 1218 and the output shaft 1229 only. At this time, bidirectional motion can be converted into unidirectional motion. When the input / output shaft 1218 receives motion from the motor 9 to actively control the float 1, the locking ring 1227 engages with the one-way gear 1223, and the clutch device 1228 disengages the input / output shaft 1218 and the output shaft 1229 only. Then, the input shaft 1215 can achieve bidirectional motion output, thereby controlling the movement of the float 1.

[0118] In the description of this invention, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0119] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0120] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A multi-sea condition oriented high efficiency multi-motor wave energy conversion system characterized by, The power transmission device comprises a connecting rod, a first connecting box, wherein the first connecting box comprises a first connecting box lower part, a first connecting box middle part and a first connecting box upper part stacked and connected from bottom to top, and the first connecting box lower part is connected with the main box, a bearing is arranged between the first connecting box upper part and the first connecting box middle part, an upper stepped shaft is arranged on the bearing, and one side end of the upper stepped shaft is connected with a transmission through a shaft coupling; A pin hole is further arranged on the upper stepped shaft, and the connecting rod is inserted into the pin hole to rotate synchronously with the upper stepped shaft; A bearing end cover is arranged on the outer end surface of the bearing, and the inner end of the bearing is in contact with the inner wall of the first connecting box upper part and the first connecting box middle part; The connection mode between the first connecting box middle part and the first connecting box lower part is consistent with the connection mode between the first connecting box upper part and the first connecting box middle part; The power transmission device further comprises a second connecting box, the second connecting box is fixedly arranged above the float, the connecting rod is arranged between the first connecting box and the second connecting box, and is rotatably connected with the first connecting box and the second connecting box at the same time. The second connecting box comprises a second connecting box lower part, a second connecting box middle part and a second connecting box upper part stacked and connected from bottom to top, the second connecting box lower part is connected with the float, an upper stepped shaft connected through a bearing is arranged between the second connecting box upper part and the second connecting box middle part, the inner end of the bearing is in contact with the inner wall of the second connecting box upper part and the second connecting box middle part, and the outer end of the bearing is provided with a bearing end cover; The end of the connecting rod is nested on the outer ring of the bearing, and is axially positioned through a sleeve and the bearing end cover; The power transmission device further comprises a second connecting box, the second connecting box is fixedly arranged above the float, the connecting rod is arranged between the first connecting box and the second connecting box, and is rotatably connected with the first connecting box and the second connecting box at the same time. The second connecting box comprises a second connecting box lower part, a second connecting box middle part and a second connecting box upper part stacked and connected from bottom to top, the second connecting box lower part is connected with the float, an upper stepped shaft connected through a bearing is arranged between the second connecting box upper part and the second connecting box middle part, the inner end of the bearing is in contact with the inner wall of the second connecting box upper part and the second connecting box middle part, and the outer end of the bearing is provided with a bearing end cover; 2. The multi-sea condition oriented high efficient multi-motor wave energy conversion system of claim 1, wherein, The end of the connecting rod is nested on the outer ring of the bearing, and is axially positioned through a sleeve and the bearing end cover; 3. The multi-sea condition oriented high efficient multi-motor wave energy conversion system of claim 2, wherein, ​ ​ The connection mode between the second connection box and the second connection box below is consistent with the connection mode between the second connection box above and the second connection box.

4. The multi-sea condition oriented high efficient multi-motor wave energy conversion system of claim 1, wherein, The power conversion device further comprises a controller and a servo system, the controller is electrically connected with the differential mechanism through the servo system, the controller is electrically connected with the brake and the clutch; when the float fluctuates with the wave, the connecting rod drives the ladder shaft of the first connection box to make small amplitude reciprocating swing, and the power is transmitted to the transmission through the shaft coupling, the transmission amplifies the motion amplitude; When the float needs to be actively controlled, the controller controls the clutch to engage, and the transmission acts as a reducer to convert the high speed and low torque from the motor into low speed and high torque.

5. The multi-sea condition oriented high efficient multi-motor wave energy conversion system of claim 4, wherein, The transmission comprises 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, and the lower box body is fixed on the main box body by bolts; The ladder shaft and the ladder gear shaft are arranged between the upper box body and the lower box body, when the ladder shaft is used as an input shaft, the transmission converts the low speed and small amplitude motion containing large torque from the float into large speed and large amplitude motion with small torque, to drive the generator to generate electricity; When the ladder gear shaft is used as an input shaft, the transmission converts the high speed and large amplitude motion with small torque from the motor into low speed and small amplitude motion with large torque to control the stable motion of the float.

6. The multi-sea condition oriented high efficient multi-motor wave energy conversion system of claim 1, wherein, The bevel gear box comprises a bolted upper box body and a lower box body, the lower box body is connected with the main box body by bolts, and the first bevel gear shaft, the second bevel gear shaft and the third bevel gear shaft are arranged between the upper box body and the lower box body and are meshed with each other, the first bevel gear shaft, the second bevel gear shaft and the third bevel gear shaft are all nested bearings; when the mechanical rectifier is arranged between the bevel gear box and the differential mechanism, the end of the first bevel gear shaft is connected with the transmission through a shaft coupling, the end of the second bevel gear shaft is connected with the mechanical rectifier through a shaft coupling, and the end of the third bevel gear shaft is connected with the clutch through a shaft 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 with the mechanical rectifier through a shaft coupling, the end of the second bevel gear shaft is connected with the differential mechanism through a shaft coupling, and the end of the third bevel gear shaft is connected with the clutch through a shaft coupling; When the first bevel gear shaft receives power from the transmission or the mechanical rectifier, the first bevel gear shaft is an input shaft, and the second bevel gear shaft and the third bevel gear shaft are output shafts, respectively transmitting power to the mechanical rectifier or the differential mechanism and the clutch; When the third bevel gear shaft receives power from the motor through the clutch, the third bevel gear shaft is an input shaft, and the first bevel gear shaft and the second bevel gear shaft are output shafts, respectively transmitting power to the mechanical rectifier or the transmission and the differential mechanism or the mechanical rectifier.

7. The multi-sea condition oriented high efficient multi-motor wave energy conversion system of claim 6, wherein, When the electric motor is as a generator, the controller controls the state of the clutch; When the electric motor is driven, when the controller controls the clutch to be engaged, the electric motor is as a generator, when the controller controls the clutch to be disengaged, the electric motor is in idle state; when the electric motor is driven, the controller controls the clutch to be engaged to control the floater to move.

8. The multi-sea condition oriented high efficient multi-motor wave energy conversion system of claim 4, wherein, The differential includes a lower box and an upper box, the lower box is connected with the main box through bolts, further includes a left output gear shaft and a right output gear shaft, a brake controls the rotation of the left output gear shaft and the right output gear shaft; When the controller makes the brake connected with 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 with 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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