WAVE ENERGY ABSORBING AND CONVERTING DEVICE AND POWER GENERATION SYSTEM

Abstract

A wave energy absorption and conversion device and a power generation system includes a floating body, a guiding shaft, a damping plate and a counteracting mechanism placed in a movement range of the damping plate. The guiding shaft is connected to the bottom of the floating body and passes through the center of the damping plate. The damping plate may slide on the guiding shaft. A counterforce generated by the counteracting mechanism is opposite to a natural moving direction of the damping plate, so that the damping plate can be kept in a relatively static state under a synergistic effect of the counteracting mechanism, and thereby, colliding of damping plate with constraint structures above and below can be prevented when floating body is moving up and down following waves. The power generation system includes the wave energy absorption and conversion device and a power generation system.

Claims

1. A wave energy absorption and conversion device, comprising a floating body (1), a damping plate (9) and a guiding shaft (5), the guiding shaft (5) being connected to the bottom of the floating body (1), the damping plate (9) relatively movably sleeving the guiding shaft (5), constraint structures being placed above and/or below the damping plate (9) to constrain the movement range of the damping plate (9) on the guiding shaft, and the moving up and down of the floating body (1) together with the guiding shaft (5) under a wave action result in relative movement counter against damping plate (9) which produces kinetic energy for electric power generation system, the wave energy absorption and conversion device being characterized in that a counteracting mechanism (14) is set at or near the middle position of the movement range of the damping plate to counteract an upward or downward moving trend of the damping plate (9); a counterforce of the counteracting mechanism (14) is gravity of a counterweight (14a) or a buoyancy force of a buoyancy tank (14b); the counterforce is opposite to the natural moving direction of the damping plate (9), so that the damping plate (9) is kept in a relatively static state underwater in the middle position of the movement range on the guiding shaft; when the floating body and the guiding shaft move up and down under a certain wave height, the damping plate is not able to reach either the up and lower constrain limits preventing the loss of relative movement.

2. The wave energy absorption and conversion device according to claim 1, characterized in that when the buoyancy force of the damping plate (9) is designed to be greater than the total gravity carried thereby, the upward moving trend of the damping plate is counteracted, and the counterweight (14a) is loaded on the damping plate, so that the sum gravity of damping plate (9) with the addition of the counterweight (14a) is greater than the sum of buoyancy forces thereof; the combination of damping plate (9) with the counterweight (14a) happens when damping plate (9) moving up to the middle position from the lower end of the movement range thereof, as an opposite acting force of the counterweight (14a) counteracts the redundant buoyancy force of the damping plate, i.e., weakens an ascending kinetic energy of a combined body, the combined body stays at the middle position of movement range, i.e., an initial combined position or vicinity, and the damping plate moves in the middle areas of other movement ranges when relative movement is generated between the damping plate and the guiding shaft by waves, so that in a certain wave range, the colliding between damping plate (9) and the upper constraint structure (11a) and is prevented and a loss of relative movement between damping plate (9) and floating body (1) is prevented, when the total carried gravity of the damping plate (9) is designed to be greater than the buoyancy force thereof, the downward moving trend of the damping plate is counteracted, and the buoyancy tank (14b) is placed below the damping plate (9), so that the sum of the buoyancy forces of the damping plate (9) and the buoyancy tank (14b) is greater than the sum of gravities carried thereby; the damping plate (9) is combined with the buoyancy tank (14b) when moving to the middle position from the upper end of the movement range thereof to the lower end, as an upward acting force of the buoyancy tank (14b) weakens the descending kinetic energy of the combined body, i.e., counteracts redundant gravity of the damping plate, the combined body stays at the middle position of movement of the damping plate, i.e., an initial combined position or vicinity, and the damping plate moves in the middle areas of other movement ranges when relative movement is generated between the damping plate and the guiding shaft by waves, so that under a certain wave height, the colliding between damping plate (9) and the lower constraint structure (11b) is prevented and the loss of relative movement between damping plate (9) and floating body (1) is prevented as well.

3. (canceled)

4. The wave energy absorption and conversion device according to claim 2, characterized in that the counterweight (14a) is dangled above the damping plate (9) with a soft chain, the buoyancy tank (14b) is pulled and suspended below the damping plate (9) with a soft chain, and the soft chain is connected with the guiding shaft (5) or a certain part integrated with the guiding shaft (5) and moving together with the guiding shaft; and the soft chain may be any length, preferably a length enabling the counterweight (14a) or the buoyancy tank (14b) to be located in the middle position of the movement range of the damping plate (9).

5. (canceled)

6. The wave energy absorption and conversion device according to claim 4, characterized in that the counteracting mechanism (14) adopts a multistage loading way, i.e., a plurality of counterweights (14a) or a plurality of buoyancy tanks (14b) are loaded, each of the counterweights or each of the buoyancy tanks being connected together with the soft chains in sequence or the counteracting mechanism (14) adopts a mixing and multistage loading way, i.e., either one or more of the counterweights (14a) or one or more of buoyancy tank (14b) are loaded, each of the counterweights or each of the buoyancy tanks being connected together with the soft chains in sequence.

7. (canceled)

8. The wave energy absorption and conversion device according to claim 4, characterized in that the constraint structure is a structure seton the upper part and/or the lower part of the guiding shaft or a certain part of the guiding shaft or a certain part of the construct integrally connected and fixed with the floating body, and the constraint structure or/and the certain part are located above and/or below the damping plate to constrain the movement range of the damping plate in a state that the counteracting mechanism is not loaded.

9. A wave energy power generation system, characterized by comprising a wave energy absorption and conversion device and a power generation system (13), the power generation system (13) being arranged at a power output end of the wave energy absorption and conversion device to convert wave energy into electric energy, wherein the wave energy absorption and conversion device comprises a floating body (1), a damping plate (9) and a guiding shaft (5), the guiding shaft (5) being connected to the bottom of the floating body (1), the damping plate (9) relatively movably sleeving the guiding shaft (5), constraint structures being arranged above and/or below the damping plate (9) to constrain the movement range of the damping plate (9) on the guiding shaft, and the floating body (1) driving the guiding shaft (5) to move up and down together under a wave action so as to relative movement with the damping plate (9) is generated to provide kinetic energy for electric power generation system; a counteracting mechanism (14) is placed in or near the middle position of the movement range of the damping plate (9) to counteract an upward or downward moving trend of the damping plate (9); a counterforce of the counteracting mechanism (14) is gravity of a counterweight (14a) or a buoyancy force of a buoyancy tank (14b); the counterforce is opposite to a natural moving direction of the damping plate (9), so that the damping plate (9) is kept in a relatively static state underwater in a middle position of the movement range on the guiding shaft, under a certain wave height when the floating body (1) drives the guiding shaft (5) to move relatively to the damping plate (9), the damping plate (9) is not able to contact with the constraint structures above or below so as to prevent the loss of relative movement.

10-12. (canceled)

13. The wave energy power generation system according to claim 9, characterized in that when the buoyancy force of the damping plate (9) is designed to be greater than the total gravity carried thereby, the upward moving trend of the damping plate is counteracted, and the counterweight (14a) is loaded upon the damping plate (9), so that the sum of the gravity carried by the damping plate (9) is greater than the sum of buoyancy forces thereof; the damping plate (9) is combined with the counterweight (14a) when moving up to the middle position from the lower end of the movement range thereof, as the opposite acting force of the counterweight (14a) counteracts the redundant buoyancy force of the damping plate (9), i.e., weakens an ascending kinetic energy of a combined body, the combined body stays in the middle position of movement range, i.e., an initial combined position or vicinity, so that under a certain wave height, the damping plate (9) moves majorly within the constrained movement ranges when relative movement is generated between the damping plate and the guiding shaft by waves, the colliding of the damping plate (9) with the upper constraint structure (11a) or the floating body (1) is prevented and the loss of relative movement is prevented as well; when the total carried gravity of the damping plate (9) is designed to be greater than the buoyancy force thereof, the downward moving trend of the damping plate is counteracted, and the buoyancy tank (14b) is loaded below the damping plate (9), so that the sum of the buoyancy forces of the damping plate (9) gained is greater than the sum of gravities thereby; the damping plate (9) is combined with the buoyancy tank (14b) when moving downward to the middle position from the upper end of the movement range thereof, as an upward acting force of the buoyancy tank (14b) weakens the descending kinetic energy of the combined body, i.e., counteracts redundant gravity of the damping plate, the combined body stays at the middle position of movement range, i.e., the initial combined position or vicinity, so that under a certain wave height, the damping plate (9) moves majorly within the constrained movement ranges when relative movement is generated between the damping plate and the guiding shaft by waves, the colliding of the damping plate (9) with the lower constraint structure (11b) is prevented and the loss of relative movement is prevented as well.

14. The wave energy absorption and conversion device according to claim 13, characterized in that the counterweight (14a) is dangled above the damping plate (9) with a soft chain, the buoyancy tank (14b) is pulled and suspended below the damping plate (9) with a soft chain, and the soft chain is connected with the guiding shaft (5) or a certain part integrated with the guiding shaft (5) and moving together with the guiding shaft; and the soft chain may be at any length, preferably a length enabling the counterweight (14a) or the buoyancy tank (14b) to be located in the middle position of the movement range of the damping plate (9).

15. The wave energy absorption and conversion device according to claim 14, characterized in that the counteracting mechanism (14) adopts a multistage loading way, i.e., a plurality of counterweights (14a) or a plurality of buoyancy tanks (14b) are loaded, each of the counterweights or each of the buoyancy tanks being connected together with the soft chains in sequence; or the counteracting mechanism (14) adopts a mixing and multistage loading way, i.e., either one or more of counterweights (14a) or one or more of buoyancy tanks (14b) are loaded, each of the counterweights or each of the buoyancy tanks being connected together with the soft chains in sequence.

16. The wave energy absorption and conversion device according to claim 14, characterized in that the constraint structure is a structure placed on the upper part and/or the lower part of the guiding shaft or a certain part integrally fixed on the floating body used as the constraint structure, and the structure and the part are located above and/or below the damping plate to constrain the movement range of the damping plate in a state that the counteracting mechanism is not loaded.

17. The wave energy electric power generation system according to claim 13, characterized in that the power generation system (13) is a piston pressurizing water turbine power generation device, comprising a generator (2), a water turbine (4) and a piston pressurizing device, wherein the generator (2) is mounted in the floating body (1) and is connected with the water turbine (4) via an energy transfer shaft, and the piston pressurizing device is located below the water surface at the bottom of floating body (1); the piston pressurizing device comprises a piston sleeve (7) and a piston (8) mounted in fit with the piston sleeve, the guiding shaft (5) passes through the piston sleeve (7) and the piston (8) mounted in fit with the piston sleeve, the piston sleeve is fixed below the floating body (1), the top of the piston sleeve is open, and the water turbine (4) is located in a running water channel (6) located at the top of the piston sleeve (7); and the bottom of the piston (8) is in rigid connection with the damping plate (9), and the plate area of the damping plate (9) is greater than that of the bottom of the piston (8); and when the floating body (1) drives the piston sleeve (7) and the guiding shaft (5) to move up and down following the waves, the piston (8) and the piston sleeve (7) are keeping in relative movement due to a synergistic effect of the counteracting mechanism of the piston (8) and the damping plate (9) so as to alternatively produce positive pressure and negative pressure in the inner cavity of the piston sleeve (7), so that the seawater flows back and forth in the running water channel (6) to impact blades of the water turbine (4) in the running water channel (6) back and forth, and therefore, the rotating blades drive the generator (2) to generate electricity.

18. The wave energy power generation system according to claim 13, characterized in that the power generation mechanism (13) is an oil pump hydraulic motor power generation device which comprises a hydraulic pump (16), a hydraulic motor (17) and a generator (2) mounted in the floating body (1), wherein a push rod (15) of the hydraulic pump (16) is connected with the damping plate (9) via a transmission piece (3), the floating body (1) and the damping plate (9) generate a relative movement under the action of the waves, a piston in the hydraulic pump (16) is pushed to move by the transmission piece (3) and the push rod (15), and a liquid in the hydraulic pump pushes the hydraulic motor (17) so as to drive the generator (2) to generate electricity.

19. The wave energy power generation system according to claim 13, characterized in that the power generation mechanism (13) is a linear motor power generation mechanism which comprises a linear motor stator (18), the push rod (15) and a linear motor sliding part (19), wherein the linear motor stator (18) is fixed in the floating body (1), the linear motor sliding part (19) is matched with the linear motor stator (18) and slides relative to the linear motor stator, and the push rod (15) is connected with and drives the linear motor sliding part (19) and is connected with the damping plate (9) via the transmission piece (3); and the floating body (1) and the damping plate (9) generate a relative movement under the action of waves, and the linear motor sliding part (19) is driven by the transmission piece (3) and the push rod (15) to move up and down relative to the linear motor stator (18) so as to generate electric energy.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0028] FIG. 1 is a diagram of a wave energy power generation device in the prior art (CN103939270A).

[0029] FIG. 2 is a diagram of a wave energy power generation device in the prior art (CN103939269B).

[0030] FIG. 3 is a voltage output diagram of a wave energy power generation device in the prior art (CN103939270A).

[0031] FIG. 4 is a voltage output diagram of a wave energy power generation device in the present invention.

[0032] FIG. 5 is a schematic diagram of a structure principle of an energy wave absorption and conversion device of the present invention (the counteracting mechanism is the counterweight).

[0033] FIG. 6 is a schematic diagram of a structure principle of an energy wave absorption and conversion device of the present invention (the counteracting mechanism is the buoyancy tank).

[0034] FIG. 7 is a schematic diagram of a specific implementation structure of a power generation device of the present invention.

[0035] FIG. 8 is a schematic diagram of another specific implementation structure of a power generation device of the present invention.

[0036] FIG. 9 is a schematic diagram of a structure principle of an energy wave absorption and conversion device of the present invention adopting a multistage counteracting mechanism.

[0037] FIG. 10 is a schematic diagram of a structure principle of an energy wave absorption and conversion device of the present invention adopting a mixed multistage counteracting mechanism.

[0038] FIG. 11 is a structural diagram of a wave energy power generation device with a power generation system being an oil pump hydraulic motor power generation device.

[0039] FIG. 12 is a structural diagram of a wave energy power generation device with a power generation system being a linear motor.

[0040] In the drawings, 1, floating body; 2, generator; 3, energy output shaft; 4, water turbine; 5, guiding shaft; 6, running water channel; 7, piston sleeve; 8, piston; 9, damping plate; 10, center shaft sleeve; 11a, upper constraint structure; 11b, lower constraint structure; 12, guiding groove; 13, power generation system; 14a, counterweight; 14b, buoyancy tank; 15, push rod; 16, hydraulic pump; 17, hydraulic motor; 18, linear motor stator; 19, linear motor sliding part.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

[0041] Further description of the present invention will be made below in combination with the drawings and a plurality of non-defining embodiments.

Example 1

[0042] Referring to FIG. 5, in the embodiment, the energy wave absorption and conversion device includes components such as a floating body 1, a damping plate 9, a guiding shaft 5 and a counteracting mechanism. The guiding shaft 5 is connected to the bottom of the floating body 1 and the guiding shaft 5 passes through a center of the damping plate 9 perpendicularly. The damping plate may slide on the guiding shaft 5 freely. The constraint structures 11a and 11b are placed on the upper portion and the lower portion of the guiding shaft 5 to constrain the movement range of the damping plate 9 between the two constraint structures 11a and 11b, and the moving up and down of the floating body 1 together with the guiding shaft 5 under a wave action result in relative movement counter against damping plate 9 which produces kinetic energy for electric power generation system (the part shown by a dotted line in the drawing, and it is to be noted that this is schematic and does not reflect a true structural connecting relationship).

[0043] In the embodiment, the counteracting mechanism is set at or near the middle position of the movement range of the damping plate to counteract the upward or downward moving trend of the damping plate. The counteracting force of the counteracting mechanism is originated from the gravity of the counterweight 14a specifically arranged or the buoyancy force of the buoyancy tank 14b specifically arranged.

[0044] In the embodiment, as the sum buoyancy force of the damping plate 9 and the buoyancy force of the load added thereto (such as the piston 8) is approximately greater than the sum gravity thereof, it is necessary to place the counterweight 14a above the damping plate 9 as the counteracting mechanism at the time. The counteracting force of the counterweight 14a is opposite to the natural moving direction of the damping plate 9, so that the damping plate 9 is kept in a relatively static state underwater in the middle position of the movement range thereof under the damping action of the damping plate itself and the synergistic effect of the counteracting mechanism. When the floating body and the guiding shaft move up and down under a certain wave height, the damping plate is not able to reach the up constrain limit (11a) preventing the loss of relative movement, so that moving stagnation and failure are prevented.

Example 2

[0045] The structure of the embodiment 1 is combined with the piston pressurizing water turbine power generation system to obtain a specific wave energy electric power generation system as shown in FIG. 7. The piston pressurizing water turbine power generation device of the system is provided with a generator 2, a water turbine 4, a piston pressurizing device and the like. Specifically, the generator 2 is mounted in the floating body 1, and the water turbine 4 and the piston pressurizing device are mounted below the floating body 1.

[0046] The piston pressurizing device of the system includes the piston 8, the piston sleeve 7 and the like. The piston sleeve 7 is connected below the floating body 1, and the top thereof is provided with the opened running water channel 6. Seawater may enter the sleeve via the running water channel 6. The water turbine 4 is located in the running water channel 6 located at the top of the piston sleeve 7 and is connected with the generator 2 in the floating body 1 via the energy output shaft 3 thereof, thereby providing power to the generator 2.

[0047] The guiding shaft 5 at the bottom of the floating body 1 passes through the piston sleeve 7 below the floating body 1 and the piston 8 mounted in fit with the piston sleeve 7 as well as the center of the damping plate 9 to guide and constrain the movements thereof. The guiding shaft 5 is provided with two constraint structures, wherein the upper constraint structure 11a is located in the piston sleeve 7 and the lower constraint structure 11b is located out of the piston sleeve 7. The guiding shaft 5 between the two constraint structures 11a and 11b is provided with the piston 8 via the center shaft sleeve 10, the piston 8 is in rigid connection with the damping plate 9 below, and the piston 8 and the damping plate 9 may move up and down together along the center guiding shaft 5. The counterweight 14a arranged above the damping plate 9 is dangled at the lower end of the piston sleeve 7 via the soft chain, and the length of the soft chain enables the counterweight 14a to be located in the middle position of the movement range of the damping plate 9 or near the movement range of the damping plate. The gravity of the counterweight 14a counteracts with the naturally upward moving force of the damping plate 9, so that the damping plate 9 may reach a relatively static state in water under the resistance of the damping plate itself and the synergistic effect of the counteracting mechanism. Thus, the damping plate will neither collide with the upper and lower constraint structures 11a and 11b within the designed wave height range (when the device is designed, the relative moving range of the floating body and the damping plate is matched with a usual wave height applied by the device) nor collide with the floating body 1 or other parts such as the piston sleeve 7 in the embodiment moving together with the floating body 1, so as to avoid stagnation and failure of the relative movement, thereby improving the energy conversion efficiency.

[0048] By adopting the power generation system, when the floating body 1 drives the piston sleeve 7 and the guiding shaft 5 to move up and down following the the waves, the piston 8 is kept in a relatively static state under the synergistic effect of the damping plate 9 and the counterweight 14a due to inertia and resistance. The relatively static state is realized by means of joint action of the damping plate 9 and the counterweight 14a, thereby resulting in uninterrupted relative movement between the piston 8 and the piston sleeve 7 so as to form alternate positive pressure and negative pressure of seawater in the inner cavity of the piston sleeve 7, so that the seawater flows back and forth in the running water channel 6 to impact blades of the water turbine 4 in the running water channel 6 back and forth, and therefore, the rotating blades drive the generator 2 to generate electricity continuously and stably.

[0049] Referring to FIG. 4, it is shown by an experiment that the voltage output by the improved system is within a range of 260V to 400V with continuous and steady wave forms, which indicates good power generation continuity and obviously improved power generation efficiency.

[0050] It is to be noted that the arrangement mode of the counteracting mechanism adopted by the embodiment is once of choices of the present invention rather than a limiting condition to the present invention.

Example 3

[0051] Referring to FIG. 6, the embodiment is directed to a circumstance that the sum of the buoyancy force of the damping plate 9 and the buoyancy force of the piston 8 loaded to the damping plate is approximately smaller than the gravity. At the time, it is necessary to arrange the buoyancy tank 14b below the damping plate 9 to counteract the downward moving trend of the damping plate. The buoyancy tank 14b is connected and pulled below the damping plate 9 with the soft chain. Under the downward pulling action of the soft chain, the buoyancy tank 14b is suspended below the damping plate 9. The length of the soft chain is to enable the buoyancy tank 14b to be located in the middle position of the movement range of the damping plate 9. When moving to the middle position from the upper end of the movement range to the lower end thereof, the damping plate 9 is combined with the buoyancy tank 14b. Without the action of the external force, the combined body stays at the initially combined position. With the action of the external force, the combined body may move downwards continuously together. As the buoyancy force of the combined body is greater than the gravity, the natural moving trend becomes upwards, which weakens the downward moving kinetic energy of the combined body. Under a certain wave height set by the system, the colliding between damping plate 9 and the lower constraint structure 11b is prevented and the loss of relative movement between damping plate 9 and the floating body 1 is prevented as well, and it starts to move upwards before collision as a result of the action of the counteracting force. When the combined body moves upwards to the initially combined position, the damping plate is naturally separated from the buoyancy tank 14b so as to gain a continuous reciprocating motion, thereby outputting stable wave energy to the generator.

Example 4

[0052] Similarly, the structure of the embodiment 3 is combined with the piston pressurizing water turbine power generation system to obtain another specific wave energy electric power generation system as shown in FIG. 8. Similarly, the piston pressurizing water turbine power generation device of the device is provided with a generator 2, a water turbine 4, a piston pressurizing device and the like. The generator 2 is mounted in the floating body 1, and the water turbine 4 and the piston pressurizing device are mounted below the floating body 1. The structure of the part is as same as that in the embodiment 2, which is no longer described in detail. The difference is that the counteracting mechanism, i.e., the buoyancy tank 14b is arranged below the damping plate 9.

Example 5

[0053] With respect to the devices in the embodiment 1 and the embodiment 3, when the wave height is far greater than an ideal working wave height range designed by the device, the damping plate still has a probability of colliding with the constraint structures, the floating body or other parts moving together with the floating body. Thus, under this circumstance, a further improved counteracting mechanism scheme may be adopted as shown in FIG. 9. By adopting the method of loading the counterweight (or the buoyancy tank) in multiple stages, one counterweight (or a plurality of counterweights according to circumstances) is increased, and the counterweights are connected by the soft chains or in other ways. By means of the scheme, the probability that the damping plate collides with the constraint structures is further reduced.

Example 6

[0054] Referring to FIG. 10, with respect to more complex scenes where the device is applied, in order to apply a reasonable counteracting force to the damping plate, a mixed and multistage loading way may be further adopted. Either the counterweight or the buoyancy tank is loaded. Both the counterweight and the buoyancy tank may be arranged in multiple stages. The counterweight shown in FIG. 10 is two-stage.

[0055] Therefore, with respect to the counteracting mechanism 14 of the present invention, the abovementioned loading ways are basic ways listed by the patent and are not limited to these disclosed loading ways. A counteracting force opposite to the natural moving direction of the damping plate is loaded in any way to the damping plate 9 in the middle area of the movement range of the damping plate 9 to guarantee that the damping plate moves in the middle area of the movement range of the damping plate when the relative movement is generated between the damping plate and the guiding shaft by waves so as to prevent the colliding of the damping plate 9 with the upper constraint structure 11a or the floating body 1 is prevented and the loss of relative movement is prevented as well.

Example 7

[0056] Referring to FIG. 11, in the embodiment, the power generation system is an oil pump hydraulic motor power generation device which includes a hydraulic pump 16 mounted in the floating body 1, a hydraulic motor 17 and a generator 2. A push rod 15 of the hydraulic pump 16 is connected with the damping plate 9 via a transmission piece 3, the floating body 1 and the damping plate 9 generate a relative movement under the action of the waves, a piston in the hydraulic pump 16 is pushed to move by the transmission piece 3 and the push rod 15, and a liquid in the hydraulic pump flows through the hydraulic motor 17 so as to drive the generator 2 to generate electricity.

Example 8

[0057] Referring to FIG. 12, in the embodiment, the power generation system is a linear motor power generation mechanism which includes a linear motor stator 18, a push rod 15 and a linear motor sliding part 19. The linear motor stator 16 is fixed in the floating body 1, and the linear motor sliding part 19 is matched with the linear motor stator 18 to slide relatively so as to generate electric energy. The push rod 15 is connected with the damping plate 9 via the transmission piece 3, and the push rod 15 passes through the floating body 1 and is connected with and drives the linear motor sliding part 19. Under the action of waves, when the floating body 1 and the damping plate 9 generate a relative movement, the linear motor sliding part 19 will be driven by the transmission piece 3 and the push rod 15 to move up and down relative to the linear motor stator 18 so as to generate electric energy.

[0058] The power generation system shown in the embodiments 2, 4 7 and 8 are merely several specific applications of the energy absorption and conversion device. Output of the wave energy may further be combined with other power generation forms, thereby, the wave energy is converted into electric energy. In addition, the abovementioned power generation systems may transmit the electric energy out via power output lines or facilities with similar functions after acquiring the electric energy online, which are routine technologies.

[0059] It may be seen from the above embodiments that most structures of the wave energy absorption and conversion device and the power generation system disclosed in the present invention are below the horizontal plane, and in particular, the structures of relative movement are under the water surface. They are good in storm resistance, so that the reliability is high. The power generation devices and the control parts are sealed in the floating body, so that they may be prevented from being corroded by seawater effectively, and therefore, the maintenance cost is lowered.

[0060] In conclusion, the device and system provided by the present invention are simple in structure and low in manufacturing cost and maintenance cost, improve the wave energy utilization ratio and improve the long-term operation reliability.

[0061] Limited several embodiments are given above to explain thought of the present invention. Apparently, all the described embodiments are merely a part of embodiments of the present invention and are not all the embodiments. On a basis of the design scheme in the present invention, all other embodiments obtained by those of ordinary skill in the technical field without creative efforts fall into the scope of protection of the present invention.