CN210919327U

CN210919327U - Wave power generation device

Info

Publication number: CN210919327U
Application number: CN201922013181.2U
Authority: CN
Inventors: 唐勇
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-11-20
Filing date: 2019-11-20
Publication date: 2020-07-03
Anticipated expiration: 2029-11-20

Abstract

The utility model discloses a wave power generation device, including swing rotating assembly, swing rotating assembly includes the reel that axis body and disk body integration set up, and the disk body both sides are provided with inner gearing formula ratchet I and inner gearing formula ratchet II of cover on the axis body respectively, its characterized in that: the device also comprises a shell, a gear speed increasing box, a generator and a swing arm; the swing rotating assembly is arranged in the shell, an input shaft of the gear speed increasing box is fixedly connected with one end of the shaft body, and an output shaft of the gear speed increasing box is fixedly connected with the generator; the swing arm is arranged outside the shell and fixed on the end part of the cylindrical gear or a ratchet I or a ratchet II adjacent to the other end of the shaft body. The utility model discloses it can turn into the electric energy with the wave energy, has with low costs, pollution-free, energy saving's advantage.

Description

Wave power generation device

Technical Field

The utility model relates to the power generation facility field, in particular to wave power generation device.

Background

70% of the earth's surface is the ocean, and the utilization of ocean energy is an important direction for the energy research in the world today. The ocean contains huge renewable energy sources, namely wave energy, but the wave energy is the most unstable energy source in the renewable energy sources, cannot be generated regularly, is strong in energy, but is slow in speed and changes periodically.

There are basically three types of wave power plants that have been developed relatively well. The device is of an oscillating water column type, a container device with a fixed volume and communicated with seawater is used, the volume of air in the container is changed due to the change of the position of the water surface generated by sea waves, the air (intermediate medium) in the container is compressed, and the compressed air is used for driving an impeller to drive a power generation device to generate power; 100KW wave power station (fixed bank type) built by Guangdong Shanwei tail of the Guangzhou energy research of the Chinese academy, Japanese Hamming power generation boat (floating type) and beacon light type wave power device belong to the type. The other is mechanical type, the movable part of the device, i.e. the duck body, the raft body, the floater and the like, is pushed by the motion of waves, the movable part compresses (drives) intermediate media such as oil, water and the like, and the conversion power generation device is pushed to generate power by the intermediate media. And thirdly, the water flow type is that waves are introduced into a high-level reservoir by utilizing a contracted water channel to form a water head, and the water head is utilized to directly drive the water turbine generator set to generate power. The three types have advantages and disadvantages, but have a common problem that the intermediate links for converting the wave energy into the electric energy are multiple, the efficiency is low, the power output fluctuation is large, the adaptability to the severe sea area environment is poor, the manufacturing cost is high, the implementation difficulty is large, and the method is also one of the main reasons influencing the large-scale development and utilization of the wave power generation.

Not only the ocean, but also some rivers and lakes can generate wave energy.

How to absorb dispersed, low-density and unstable wave energy in a wide range and high efficiency and convert the wave energy into useful electric energy in a centralized, economic and high-efficiency manner is a difficult problem and direction for the development of the wave energy at present.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a wave power generation device, it can turn into the electric energy with the wave energy, has with low costs, pollution-free, energy saving's advantage.

The utility model aims at realizing the wave power generation device by the following technical proposal, which comprises a swing rotating component with a shaft body, a cylindrical gear, a ratchet I and a ratchet II, and also comprises a shell, a gear speed increasing box, a generator and a swing arm; the swing rotating assembly is arranged in the shell, an input shaft of the gear speed increasing box is fixedly connected with one end of the shaft body, and an output shaft of the gear speed increasing box is fixedly connected with the generator; the swing arm is arranged outside the shell and is fixedly connected with the end part of the cylindrical gear or fixedly connected with the ratchet I or the ratchet II adjacent to the other end of the shaft body.

The working principle of the scheme is as follows: during the use, put into the region that has the wave behind the raft body with wave power generation facility, the fluctuation of wave drives the swing arm luffing motion, 5 one ends of swing arm are fixed on wave power generation facility, the other end is fixed in bank, the raft body, etc. fixed or other can produce the poor position of fluctuation with wave power generation facility, the fluctuation of wave 106 drives the tip luffing motion of swing arm 5, then transmits the axis body through swing rotating assembly, the axis body rotates and transmits gear step-up box, gear step-up box transmits the electricity generation for the generator after accelerating. In order to increase the generated power, can use a plurality of wave power generation device to generate electricity simultaneously, wave power generation device includes two or more, is connected through the swing arm connecting rod between adjacent wave power generation device and the wave power generation device, the both ends of swing arm connecting rod respectively with two adjacent wave power generation device's swing arm fixed connection, the left and right sides of every raft body all can set up wave power generation device. The length of the swing arm connecting rod is preferably such that adjacent wave power generation devices are located one at the crest and one at the trough of the wave. Furthermore, in order to install conveniently and reduce the input cost, the cross section of the end part of the swing arm connecting rod is Y-shaped, a mounting hole matched with the end part of the swing arm connecting rod is formed in the swing arm, and the end part of the swing arm connecting rod is inserted into the mounting hole. In order to fix the movement area of the raft and to deliver power with a cost saving, steel cables can be connected between adjacent power generation devices, between adjacent power generation devices and buoys, and between adjacent buoys and anchors, the cables are attached to the steel cables, and finally the electricity generated by the wave power generation devices is delivered to the grid or users, etc. through the cables 105.

The scheme has the beneficial effects that the wave energy can be converted into electric energy, and the scheme also has the advantages of low cost, no pollution and energy conservation.

Drawings

Figure 1 is a schematic cross-sectional view of a swing rotor assembly and a housing in a wave power unit according to the invention;

FIG. 2 is a schematic cross-sectional view of the inner-meshing ratchet mechanism I and the shaft disc of the wave power generator of the present invention;

FIG. 3 is a schematic cross-sectional view of the inner-meshing ratchet mechanism II and the shaft disc of the wave power generator of the present invention;

FIG. 4 is a schematic front view of a plurality of wave power units of the present invention in use;

FIG. 5 is a schematic top view of a plurality of wave power units of the present invention in use;

fig. 6 is an enlarged schematic view at a in fig. 5.

In the figure: 1, 2, 3, an internal meshing type ratchet mechanism I, 3, a cylindrical gear, 5 swing arms, 6 gear speed increasing boxes, 7 bearings, 8 generators, 9, end caps, 10 shells, 101 oil seal flanges, 102 oil leakage holes, 103 buoys, 104 anchors, 105 cables and 106 sea waves; 107 swing arm connecting rods, 108 couplings I, 109 couplings II, 20 seabed lines and 201 raft bodies;

11 shafts and 12 disks;

21, ratchet wheels I and 22 clamping and fixing devices I;

211, 212, ratchet holes I and 213 arc racks I;

31 ratchet wheels II and 32 clamping and fixing devices II;

311 ratchet teeth II and 312 ratchet holes II and 313 arc-shaped racks II and 314 through holes.

Detailed Description

Anchors are usually fixed on the shore of coastal areas, buoys are fixed on the anchors through cables, raft bodies are fixed between the buoys through the cables, and intervals are arranged between adjacent raft bodies.

Reference will now be made in detail to the embodiments, examples of which are illustrated in the accompanying drawings.

As shown in fig. 1 to 6, a wave power generation device comprises a swing rotating assembly with a shaft body 11, a cylindrical gear 4, a ratchet wheel I21 and a ratchet wheel II 31, and further comprises a shell 10, a gear speed increasing box 6, a generator 8 and a swing arm 5; the swing rotating assembly is arranged in the shell, an input shaft of the gear speed increasing box 6 is fixedly connected with one end of the shaft body 11, and an output shaft of the gear speed increasing box 6 is fixedly connected with the generator 8; the swing arm 5 is arranged outside the shell and is fixedly connected with the end part of the cylindrical gear 4 or fixedly connected with the ratchet I21 or the ratchet II 31 adjacent to the other end of the shaft body 11.

The working principle of the scheme is as follows: during the use, put into the region that has the wave after fixing wave power generation set's casing 10 in raft body 201, swing arm 5 one end is fixed on wave power generation set, and the other end is fixed on the bank, the raft body, etc. and is fixed or other can produce the poor position of fluctuation with wave power generation set, and the end luffing motion of swing arm 5 is driven in the fluctuation of wave 106, then transmits the axis body 11 through swing rotating assembly, and the axis body 11 rotates and transmits gear step-up box 6, and gear step-up box 6 transmits the back electricity generation for generator 8 after accelerating. In order to increase the generated power, a plurality of wave power generation devices can be used to generate power simultaneously, each wave power generation device comprises two or more than two, the adjacent wave power generation devices are connected with each other through a swing arm connecting rod, the two ends of each swing arm connecting rod 107 are respectively fixedly connected with the swing arms 5 of the two adjacent wave power generation devices, and the wave power generation devices can be arranged on the left side and the right side of each raft body 201. The length of the swing arm link 107 is preferably such that adjacent wave power plants are located one at the crest and one at the trough of the wave. In order to secure the movement area of raft 201 and to deliver electricity at a cost savings, steel cables may be connected between adjacent power generation devices, between adjacent power generation devices and buoy 103, between adjacent buoy 103 and anchor 104, with electrical cables 105 attached to the steel cables, and the resulting electricity delivered to the grid or user, etc. through electrical cables 105. When in use, the wave power generation device can be fixed on the raft body 201, and also can be fixed at the position of the bank, the hoard and the like which can lead the swing arm to swing up and down along with the waves.

Further, the swing rotating component comprises a shaft disc 1 which is integrally arranged on the shaft body 11 and the disc body 12, an inner meshing type ratchet mechanism I2 and an inner meshing type ratchet mechanism II 3 which are sleeved on the shaft body 11 are respectively arranged on two sides of the disc body 12, the inner meshing type ratchet mechanism I2 comprises a ratchet wheel I21 and a clamping device I22 which is arranged on the disc body 12, the ratchet wheel I21 comprises a ratchet wheel hole I212 with ratchet teeth I211 and an arc-shaped rack I213 which is arranged on the outer edge of the ratchet wheel I21, the clamping device I22 is meshed with the ratchet teeth I211, the inner meshing type ratchet mechanism II 3 comprises a ratchet wheel II 31 and a clamping device II 32 which is arranged on the disc body 12, the ratchet wheel II 31 comprises a ratchet wheel hole II 312 with ratchet teeth II 311 and a through hole 314 with the arc-shaped rack II 313, the clamping device II 32 is meshed with the ratchet teeth II 311, and a cylindrical gear 4 which is meshed with the arc-shaped rack I213, the arc-shaped rack I213 and the arc-shaped rack II 313 are arranged on two symmetrical sides of the cylindrical gear 4, and the direction of the ratchet teeth I211 is the same as that of the ratchet teeth II 311.

The principle that the swing rotating assembly converts the swing arm 5 to swing up and down into the shaft body 1 is as follows: when the swing arm 5 is arranged on the ratchet wheel I21, the swing arm 5 swings back and forth to drive the ratchet wheel I21 to do reciprocating rotation movement, when the swing arm 5 swings towards the left, the ratchet wheel I21 rotates clockwise, the clamping device I22 slides on the tooth back of the ratchet wheel teeth I211, the ratchet wheel I21 drives the ratchet wheel II 31 to rotate anticlockwise through the cylindrical gear 4 meshed with the arc-shaped rack I213 and the arc-shaped rack II 313, at the moment, the clamping device II 32 is meshed with the ratchet wheel teeth II 311, the directions of the ratchet wheel teeth I211 and the ratchet wheel teeth II 311 are the same, so that the clamping device II 32 is inserted into a tooth groove between the ratchet wheel teeth II 311 and the ratchet wheel teeth II 311, and the ratchet wheel II 31 drives the shaft disc 1 to rotate anticlockwise through the clamping device II 32 inserted into the tooth groove; when the swing arm 5 swings rightwards, the ratchet I21 rotates anticlockwise, the clamping device I22 is inserted into a tooth groove between the ratchet tooth I211 and the ratchet tooth I211 at the moment, the ratchet I21 drives the shaft disc 1 to rotate anticlockwise through the clamping device I22 inserted into the tooth groove, the ratchet I21 drives the ratchet II 31 to rotate clockwise towards the swing arm 5 through the cylindrical gear 4 meshed with the arc-shaped rack I213 and the arc-shaped rack II 313, at the moment, the clamping device II 32 is meshed with the ratchet tooth II 311, the directions of the ratchet tooth I211 and the ratchet tooth II 311 are the same, therefore, the clamping device II 32 slides on the tooth back of the ratchet tooth II 311, and the ratchet II 31 does not work on the shaft disc 1. Therefore, the shaft disc 1 always rotates anticlockwise continuously in the continuous swinging process of the swing arm 5 no matter to the left or to the right.

When the swing arm 5 is arranged on the ratchet wheel II 31, the swing arm 5 swings back and forth to drive the ratchet wheel II 31 to do reciprocating rotation movement, when the swing arm 5 swings towards the left, the ratchet wheel II 31 rotates clockwise, the clamping device II 32 slides on the tooth back of the ratchet teeth II 311, the ratchet wheel II 31 drives the ratchet wheel I21 to rotate anticlockwise through the cylindrical gear 4 meshed with the arc-shaped rack I213 and the arc-shaped rack II 313, at the moment, the clamping device I22 is meshed with the ratchet teeth I211, the direction of the ratchet teeth I211 is the same as that of the ratchet teeth II 311, therefore, the clamping device I22 is inserted into a tooth groove between the ratchet teeth I211 and the ratchet teeth I211, and the ratchet wheel I21 drives the shaft disc 1 to rotate anticlockwise through the clamping device I22 inserted into the tooth groove; when the swing arm 5 swings rightwards, the ratchet wheel II 31 rotates anticlockwise, the clamping device II 32 is inserted into a tooth groove between the ratchet teeth II 311 and the ratchet teeth II 311 at the moment, the ratchet wheel II 31 drives the shaft disc 1 to rotate anticlockwise through the clamping device II 32 inserted into the tooth groove, the ratchet wheel II 31 drives the ratchet wheel I21 to rotate clockwise towards the swing arm 5 through the cylindrical gear 4 meshed with the arc-shaped rack I213 and the arc-shaped rack II 313, at the moment, the clamping device I22 is meshed with the ratchet teeth I211, the directions of the ratchet teeth I211 and the ratchet teeth II 311 are the same, therefore, the clamping device I22 slides on the back of the ratchet teeth I211, and the ratchet wheel I21 does not work on the shaft disc 1. Therefore, the shaft disc 1 always rotates anticlockwise continuously in the continuous swinging process of the swing arm 5 no matter to the left or to the right.

When the swing arm 5 is arranged on the cylindrical gear 4, the swing arm 5 swings back and forth to drive the cylindrical gear 4 to do reciprocating rotation motion, when the swing arm 5 swings towards the left, the cylindrical gear 4 rotates clockwise, as the cylindrical gear 4 is meshed with an arc-shaped rack I213 on the ratchet I21 and an arc-shaped rack II 313 on the ratchet II 31, and the arc-shaped rack I213 and the arc-shaped rack II 313 are arranged at two symmetrical sides of the cylindrical gear 4, the ratchet I21 rotates anticlockwise and the ratchet II 31 rotates clockwise, at the moment, as the directions of the ratchet teeth I211 and the ratchet teeth II 311 are the same, the clamping device I22 is meshed with the ratchet teeth I211, the clamping device II 32 is meshed with the ratchet teeth II 311, so that the clamping device I22 is inserted into a tooth space between the ratchet teeth I211 and the ratchet teeth I211, the ratchet I21 drives the shaft disc 1 to rotate anticlockwise through the inserted clamping device I22, the clamping device II 32 slides on the tooth back of the ratchet wheel tooth II 311, and the ratchet wheel II 31 does not work on the shaft disc 1; when the swing arm 5 swings towards the right, the cylindrical gear 4 rotates anticlockwise, the cylindrical gear 4 is meshed with an arc-shaped rack I213 on the ratchet I21 and an arc-shaped rack II 313 on the ratchet II 31, the arc-shaped rack I213 and the arc-shaped rack II 313 are arranged on two symmetrical sides of the cylindrical gear 4, therefore, the ratchet I21 rotates clockwise, the ratchet II 31 rotates anticlockwise, at the moment, as the ratchet teeth I211 and the ratchet teeth II 311 are in the same direction, the clamping device I22 is meshed with the ratchet teeth I211, the clamping device II 32 is meshed with the ratchet teeth II 311, therefore, the clamping device I22 slides on the tooth back of the ratchet teeth I211, the ratchet I21 does not work on the shaft disc 1, the clamping device II 32 is inserted into a tooth socket between the ratchet teeth II 311, and the ratchet II 31 drives the shaft disc 1 to rotate anticlockwise through the inserted clamping device II 32. Therefore, the shaft disc 1 always rotates anticlockwise continuously in the continuous swinging process of the swing arm 5 no matter to the left or to the right.

In the embodiment, the directions of the ratchet teeth I211 and the ratchet teeth II 311 are in the counterclockwise direction, in another embodiment, the directions of the ratchet teeth I211 and the ratchet teeth II 311 are in the clockwise direction, the rotation principle of the ratchet teeth I211 and the ratchet teeth II 311 is the same as that of the ratchet teeth I311 and the ratchet teeth II 311 arranged in the counterclockwise direction, and the shaft disc 1 always rotates clockwise continuously in the continuous swinging process of the swing arm 5 no matter in the leftward or rightward direction.

Further, an input shaft of the gear speed increasing box 6 is fixedly connected with one end of the shaft body 11 through a coupling I.

Further, the output shaft of the gear speed increasing box 6 is fixedly connected with the generator 8 through a coupling II.

Further, both ends of the cylindrical gear 4 protrude outside the housing. The purpose of the two ends of the cylindrical gear 4 extending outside the housing is to facilitate the connection of the ends of the cylindrical gear 4 with the swing arm. If the two ends of the cylindrical gear 4 do not extend out of the shell, the swing arm 5 is required to extend into the shell to be connected with the cylindrical gear 4.

Further, the swing arms 5 include two, and the two swing arms 5 are respectively fixed at two ends of the cylindrical gear 4. Both ends of the cylindrical gear 4 are provided with the swing arms 5, and compared with the cylindrical gear 4 with only one end provided with the swing arm 5, the swing arm can convert more kinetic energy generated by sea waves into electric energy. In order to increase the generated power, a plurality of wave power generation devices can be used to generate power simultaneously, each wave power generation device comprises two or more than two, the adjacent wave power generation devices are connected with each other through a swing arm connecting rod, the two ends of each swing arm connecting rod 107 are respectively fixedly connected with the swing arms 5 of the two adjacent wave power generation devices, and the wave power generation devices can be arranged on the left side and the right side of each raft body 201. Further, in order to facilitate installation and reduce investment cost, the cross section of the end part of the swing arm connecting rod 107 is Y-shaped, the swing arm is provided with mounting holes matched with the end parts of the swing arm connecting rods, and the end parts of the two ends of each swing arm connecting rod are respectively inserted into the mounting holes of the four swing arms 5 in the two adjacent wave power generation devices.

Furthermore, an end cap 9 extending out of the shell and covering the other end of the shaft body 11 is arranged on the ratchet I21 or the ratchet II 31, and the swing arm 5 is fixed on the end cap 9. When the input shaft of the gear speed increasing box 6 is fixedly connected with one end of a shaft body 11, and one end of the shaft body 11 is adjacent to a ratchet I21, an end cap 9 which extends out of the shell and covers the other end of the shaft body 11 is arranged on a ratchet II 31; as shown in figure 1, when the input shaft of the gear speed increasing box 6 is fixedly connected with one end of a shaft body 11, and one end of the shaft body 11 is adjacent to a ratchet wheel II 31, an end cap 9 which extends out of the shell and covers the other end of the shaft body 11 is arranged on the ratchet wheel I21. At ordinary times, the swing arm 5 is fixed at the end part of the cylindrical gear 4, when sea waves are in a calm period, the swing arm 5 fixed at the end part of the cylindrical gear 4 can be taken down, then the swing arm 5 is fixed on the end cap 9, and even small wave fluctuation when the swing arm 5 is fixed on the end cap 9 can drive the shaft body 11 to rotate so as to achieve the purpose of power generation.

Further, an oil seal flange 101 or a seal ring is provided between one end of the shaft body 11 and the housing or/and between the end of the cylindrical gear 4 and the housing. Lubricating oil needs to be poured into the shell in the wave power generation device to reduce friction generated in the mechanical transmission process of the swing rotating assembly, and the oil seal flange 101 or the seal ring is arranged to prevent the lubricating oil in the shell from leaking or water, impurities and the like from entering the shell.

Further, bearings 7 are arranged between the ratchet I21 and the shaft body 11, between the ratchet I21 and the shell, between the ratchet II 31 and the shaft body 11, and between the ratchet II 31 and the shell. In the present embodiment, the bearing 7 is a needle bearing, and in another embodiment, the bearing 7 may be another bearing. The bearing 7 is used for supporting the mechanical rotating body, reducing the friction coefficient in the moving process of the mechanical rotating body and ensuring the rotation precision of the mechanical rotating body.

Furthermore, oil leakage holes 102 are formed in the ratchet I21 or/and the ratchet II 31. Lubricating oil needs to be poured into a shell in the wave power generation device to reduce friction generated in the mechanical transmission process of the swing rotating assembly, the oil leakage hole 102 in the ratchet I21 is used for enabling the lubricating oil to enter a space between the ratchet I21 and the shaft disc 1 through the through hole, and the oil leakage hole 102 in the ratchet II 31 is used for enabling the lubricating oil to enter a space between the ratchet II 31 and the shaft disc 1 through the through hole.

Further, the retaining device i 22 or/and the retaining device ii 32 is/are pawls provided on the tray body 12. In this embodiment, the tray 12 is provided with a pawl slot, the pawl is provided with a spring, the pawl slot is provided with a pawl with a spring, and the pawl is movably arranged in the pawl slot through the spring.

Further, the retaining device I22 is one to eight pawls circumferentially uniformly or non-uniformly distributed in the ratchet hole I212. The number of pawls is six in this embodiment.

Further, the fastening device ii 32 is one to eight pawls circumferentially uniformly or non-uniformly distributed in the ratchet hole ii 312. The number of pawls is six in this embodiment.

Claims

1. The utility model provides a wave power generation device, is including the swing rotating assembly who has axis body (11), cylindricality gear (4), I (21) ratchet and II (31) ratchet, its characterized in that: the device also comprises a shell (10), a gear speed increasing box (6), a generator (8) and a swing arm (5); the swing rotating assembly is arranged in the shell, an input shaft of the gear speed increasing box (6) is fixedly connected with one end of the shaft body (11), and an output shaft of the gear speed increasing box (6) is fixedly connected with the generator (8); the swing arm (5) is arranged outside the shell and is fixedly connected with the end part of the cylindrical gear (4) or fixedly connected with a ratchet I (21) or a ratchet II (31) adjacent to the other end of the shaft body (11).

2. A wave-power unit according to claim 1, characterized in that: the swing rotating assembly comprises a shaft disc (1) which is integrally arranged by a shaft body (11) and a disc body (12), an internal meshing type ratchet mechanism I (2) and an internal meshing type ratchet mechanism II (3) which are sleeved on the shaft body (11) are respectively arranged on two sides of the disc body (12), the internal meshing type ratchet mechanism I (2) comprises a ratchet wheel I (21) and a clamping device I (22) arranged on the disc body (12), the ratchet wheel I (21) comprises a ratchet wheel hole I (212) with ratchet teeth I (211) and an arc-shaped rack I (213) arranged on the outer edge of the ratchet wheel I (21), the clamping device I (22) is meshed with the ratchet teeth I (211), the internal meshing type ratchet mechanism II (3) comprises a ratchet wheel II (31) and a clamping device II (32) arranged on the disc body (12), the ratchet wheel II (31) comprises a ratchet wheel hole II (312) with ratchet teeth II (311) and a through hole (314) with the arc-shaped rack II (313), the clamping device II (32) is meshed with the ratchet teeth II (311), cylindrical gears (4) meshed with the arc-shaped racks I (213) and the arc-shaped racks II (313) are arranged in the through holes (314), the arc-shaped racks I (213) and the arc-shaped racks II (313) are arranged on two symmetrical sides of the cylindrical gears (4), and the ratchet teeth I (211) and the ratchet teeth II (311) are in the same direction.

3. A wave-power unit according to claim 1 or 2, characterized in that: two ends of the cylindrical gear (4) extend out of the shell.

4. A wave-power unit according to claim 3 characterized in that: the swing arms (5) comprise two swing arms, and the two swing arms (5) are respectively fixed at two ends of the cylindrical gear (4).

5. A wave-power unit according to claim 3 characterized in that: an end cap (9) extending out of the shell and covering the other end of the shaft body (11) is arranged on the ratchet I (21) or the ratchet II (31), and the swing arm (5) is fixed on the end cap (9).

6. A wave-power unit according to claim 5, characterized in that: an oil seal flange (101) or a sealing ring is arranged between the end cap (9) and the shell, between one end of the shaft body (11) and the shell or/and between the end part of the cylindrical gear (4) and the shell.

7. A wave-power unit according to claim 1, 2, 4, 5 or 6 characterized in that: and bearings (7) are arranged between the ratchet I (21) and the shaft body (11), between the ratchet I (21) and the shell, between the ratchet II (31) and the shaft body (11) and between the ratchet II (31) and the shell.

8. A wave-power unit according to claim 3 characterized in that: and bearings (7) are arranged between the ratchet I (21) and the shaft body (11), between the ratchet I (21) and the shell, between the ratchet II (31) and the shaft body (11) and between the ratchet II (31) and the shell.

9. A wave-power unit according to claim 1, 2, 4, 5, 6 or 8 characterized in that: the ratchet I (21) or/and the ratchet II (31) are/is provided with oil leakage holes (102).

10. A wave-power unit according to claim 3 characterized in that: the ratchet I (21) or/and the ratchet II (31) are/is provided with oil leakage holes (102).