CN116292486B - Wave energy device hydraulic circuit and wave energy power generation hydraulic system - Google Patents
Wave energy device hydraulic circuit and wave energy power generation hydraulic system Download PDFInfo
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- CN116292486B CN116292486B CN202310547412.6A CN202310547412A CN116292486B CN 116292486 B CN116292486 B CN 116292486B CN 202310547412 A CN202310547412 A CN 202310547412A CN 116292486 B CN116292486 B CN 116292486B
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- 238000010248 power generation Methods 0.000 title claims abstract description 25
- 239000010720 hydraulic oil Substances 0.000 claims description 52
- 239000007788 liquid Substances 0.000 claims description 28
- 230000007246 mechanism Effects 0.000 claims description 13
- 230000007704 transition Effects 0.000 claims description 11
- 239000003921 oil Substances 0.000 claims description 10
- 238000006073 displacement reaction Methods 0.000 claims description 4
- 238000011144 upstream manufacturing Methods 0.000 claims description 4
- 239000012530 fluid Substances 0.000 claims 1
- 230000005611 electricity Effects 0.000 description 21
- 230000009471 action Effects 0.000 description 14
- 238000000034 method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 238000004146 energy storage Methods 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000008602 contraction Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/30—Energy from the sea, e.g. using wave energy or salinity gradient
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Abstract
The invention discloses a hydraulic circuit of a wave energy device, which relates to the technical field of hydraulic pressure, and relates to a hydraulic circuit, wherein a hydraulic cylinder and a reversing valve are connected through a circuit on-off assembly, so that the control mode of on-off of the hydraulic circuit is simplified, electric power supply and corresponding electric control systems are not needed, the energy is saved, the environment is protected, the cost is reduced, the working pressure range of the hydraulic circuit can be adjusted according to actual requirements, and the flexibility is high. The invention also provides a wave energy power generation hydraulic system which is provided with a plurality of groups of wave energy device hydraulic circuits, wherein the wave energy device hydraulic circuit positioned at the upper stage is communicated with the wave energy device hydraulic circuit positioned at the adjacent lower stage through a one-way valve, so that the lower stage wave energy device hydraulic circuit can be automatically started when the wave condition is better, the simultaneous power generation of the multistage wave energy device hydraulic circuits is realized, and the purpose of fully utilizing the wave energy is achieved.
Description
Technical Field
The invention relates to the technical field of hydraulic pressure, in particular to a hydraulic circuit of a wave energy device and a wave energy power generation hydraulic system.
Background
Wave energy power generation devices, also known as "wave energy devices". Most of the wave energy device adopts an energy storage power generation mode, when the hydraulic circuit pressure of the wave energy device reaches the set highest working pressure, a circuit is formed, a generator starts to generate power, when the hydraulic circuit pressure reaches the set lowest working pressure, the circuit is broken, the generator stops generating power, and the wave energy device stores energy again.
In a hydraulic loop of the wave energy device, the on-off of the loop is often controlled through an electromagnetic reversing valve, so that whether a generator generates electricity or not is controlled. This control requires power supply, and for wave energy devices remote from the land, the power supply to deliver power from the land or to generate electricity by means of generators is costly and not environmentally friendly.
Disclosure of Invention
The invention aims to provide a wave energy device hydraulic circuit and a wave energy power generation hydraulic system, so as to solve the problems that the reversing valve in the existing wave energy device hydraulic circuit also needs electric power control, and the cost is high and the system is not environment-friendly.
In order to achieve the above object, the present invention provides the following solutions: the invention provides a hydraulic loop of a wave energy device, which comprises a reversing valve, a hydraulic cylinder and a loop on-off assembly, wherein a liquid inlet of the reversing valve is used for being connected with a hydraulic oil source, a liquid outlet of the reversing valve is sequentially connected with a hydraulic motor and an oil tank, and the hydraulic motor is used for being connected with a generator; the rod cavity of the hydraulic cylinder is used for being connected with a hydraulic oil source, and the rodless cavity of the hydraulic cylinder is provided with a piston resetting piece which can provide restoring force for a piston rod; the loop on-off assembly comprises a reversing rod, a pressing block, a first check ring, a second check ring and a check ring limiting piece; the reversing rod is coaxially connected with a valve core rod of the reversing valve, the first check ring and the second check ring are sleeved on the reversing rod, the pressing block is slidably connected to the reversing rod, the pressing block is located between the first check ring and the second check ring, a first emergency elastic piece is arranged between the first check ring and the pressing block, a second emergency elastic piece is arranged between the second check ring and the pressing block, and the pressing block is connected with a piston rod of the hydraulic cylinder; the check ring limiting piece is used for limiting the moving range of the reversing rod through being matched with the first check ring and the second check ring so as to control the on-off of the reversing valve.
Optionally, the first quick rebound spring is a first quick rebound spring, and the first quick rebound spring is sleeved on the reversing rod; the second quick rebound spring is sleeved on the reversing rod.
Optionally, the retaining ring limiting piece comprises a first pawl and a second pawl, the first pawl is mounted on the periphery of the reversing lever through a first mounting seat, the first pawl is rotationally connected with the first mounting seat, and the first pawl is located on one side, far away from the second retaining ring, of the first retaining ring; one end of the first pawl, which is far away from the second check ring, is provided with two stages of first limiting bosses used for limiting the first check ring, and one end of the first pawl, which is close to the second check ring, is provided with a first transition surface for the pressing block to slide in; the second pawl is arranged on the periphery of the reversing rod through a second mounting seat, the second pawl is rotationally connected with the second mounting seat, and the second pawl is positioned on one side, far away from the first check ring, of the second check ring; one end of the second pawl, which is far away from the first check ring, is provided with two stages of second limiting bosses used for limiting the second check ring, and one end of the second pawl, which is close to the first check ring, is provided with a second transition surface for the pressing block to slide in.
Optionally, the reversing valve is a two-position two-way reversing slide valve.
Optionally, a reversing lever sliding guide mechanism for guiding the sliding of the reversing lever is further included.
Optionally, the reversing lever sliding guide mechanism includes a sliding rail arranged parallel to the reversing lever, and the reversing lever is in sliding fit with the sliding rail.
Optionally, the piston return member is a return spring, and is disposed in the rodless cavity of the hydraulic cylinder and located between the bottom of the hydraulic cylinder and the piston rod.
Optionally, a limiting part is arranged between the cylinder bottom in the hydraulic cylinder and the piston rod, and the limiting part is arranged on the cylinder bottom in the hydraulic cylinder or the piston rod so as to limit the contraction displacement of the piston rod.
The invention also provides a wave energy power generation hydraulic system, which comprises a hydraulic oil source and a plurality of groups of wave energy device hydraulic circuits, wherein one group of wave energy device hydraulic circuits is connected with the hydraulic oil source as a primary hydraulic circuit, the other groups of wave energy device hydraulic circuits are connected with the hydraulic oil source through check valves and are sequentially positioned at the downstream of the primary hydraulic circuit, liquid inlets of the check valves corresponding to the other groups of wave energy device hydraulic circuits except the primary hydraulic circuit are respectively communicated with the hydraulic cylinders of the wave energy device hydraulic circuits at the adjacent upstream, and the check valves are used for preventing oil in the corresponding wave energy device hydraulic circuits from flowing back to the wave energy device hydraulic circuits at the upstream.
Optionally, the wave energy power generation hydraulic system comprises two groups of wave energy device hydraulic circuits as described above, wherein one group of wave energy device hydraulic circuits is used as a primary hydraulic circuit to be connected with the hydraulic oil source, the other group of wave energy device hydraulic circuits is used as a secondary hydraulic circuit to be connected with the hydraulic oil source through a check valve and is positioned at the downstream of the primary hydraulic circuit, and a liquid inlet of the check valve is also communicated with the hydraulic cylinder of the primary hydraulic circuit.
Compared with the prior art, the invention has the following technical effects: according to the hydraulic circuit of the wave energy device, the hydraulic cylinder and the reversing valve are connected through the circuit on-off assembly, so that the control mode of on-off of the hydraulic circuit is simplified, power supply and installation of a corresponding electric control system are not needed, energy conservation and environmental protection are achieved, the cost is reduced, the working pressure range of the hydraulic circuit can be adjusted according to actual requirements, and the flexibility is high. Meanwhile, when the wave condition of the sea area where the wave energy device is located is common, a single group of wave energy device hydraulic circuits can be used for generating electricity independently, and when the wave condition is better, a plurality of groups of wave energy device hydraulic circuits can be used in a combined mode to generate electricity together, so that the wave energy is fully utilized.
The wave energy power generation hydraulic system provided by the invention is provided with a plurality of groups of wave energy device hydraulic circuits, and the wave energy device hydraulic circuit at the upper stage is communicated with the wave energy device hydraulic circuits at the adjacent lower stages through the one-way valve, so that the lower-stage wave energy device hydraulic circuits can be automatically started when the wave condition is better, the simultaneous power generation of the multistage wave energy device hydraulic circuits is realized, and the purpose of fully utilizing the wave energy is achieved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a hydraulic circuit of a wave energy device according to an embodiment of the present invention.
Fig. 2 is a schematic structural view of a first pawl and a second pawl in a hydraulic circuit of a wave energy device according to an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a wave energy power generation hydraulic system according to an embodiment of the present invention when power generation is not performed by a generator in both a primary hydraulic circuit and a secondary hydraulic circuit.
Fig. 4 is a schematic structural diagram of a generator in a primary hydraulic circuit of the wave energy power generation hydraulic system according to an embodiment of the present invention when the generator generates power alone.
Fig. 5 is a schematic structural diagram of a wave energy power generation hydraulic system according to an embodiment of the present invention when power generators in a primary hydraulic circuit and a secondary hydraulic circuit generate power.
Wherein, the reference numerals are as follows: 100. a wave energy device hydraulic circuit; 200. a wave energy power generation hydraulic system; 300. a one-way valve; 400. a hydraulic oil source; 1. a reversing valve; 11. a reversing valve body; 12. a valve core rod; 2. a hydraulic cylinder; 21. a hydraulic cylinder block; 22. a piston rod; 3. a loop on-off assembly; 31. a reversing lever; 32. briquetting; 33. a first retainer ring; 34. the second check ring; 35. a first sharp resilient member; 36. a second sharp resilient member; 37. a first pawl; 371. the first limiting boss; 372. a first transition surface; 38. a second pawl; 381. the second limiting boss; 382. a second transition surface; 39. a first mount; 310. a second mounting base; 4. a hydraulic motor; 5. an oil tank; 6. a coupling; 7. a generator; 8. a piston return member; 9. a limiting piece; 10. a slide rail.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention aims to provide a hydraulic circuit of a wave energy device, which solves the problems that a reversing valve in the existing hydraulic circuit of the wave energy device needs electric power control, has higher cost and is not environment-friendly.
The invention also aims to provide a wave energy power generation hydraulic system with the wave energy device hydraulic circuit, which not only solves the problems that the reversing valve in the existing wave energy device hydraulic circuit needs power control, has higher cost and is not environment-friendly, but also can automatically increase and decrease the number of wave energy device hydraulic circuits participating in power generation according to the sea area wave condition of the wave energy device, and enhances the self-adaptability of the wave energy device.
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
Example 1
As shown in fig. 1, 3-5, the present embodiment provides a hydraulic circuit 100 of a wave energy device, which mainly includes a reversing valve 1, a hydraulic cylinder 2 and a circuit on-off assembly 3, wherein a liquid inlet of the reversing valve 1 is used for connecting with a hydraulic oil source 400, a liquid outlet of the reversing valve 1 is connected with a liquid inlet of a hydraulic motor 4, a liquid outlet of the hydraulic motor 4 is connected with an oil tank 5, and the hydraulic motor 4 is used for connecting with a generator 7; the hydraulic cylinder 2 is provided with a liquid inlet (liquid outlet) of a rod cavity and is used for being connected with a hydraulic oil source 400, and a rodless cavity of the hydraulic cylinder 2 is provided with a piston resetting piece 8 which can provide restoring force for a piston rod 22; the loop on-off assembly 3 comprises a reversing rod 31, a pressing block 32, a first check ring 33, a second check ring 34 and a check ring limiting piece; the reversing rod 31 is coaxially connected with the valve core rod 12 of the reversing valve 1, the first check ring 33 and the second check ring 34 are sleeved on the reversing rod 31, the pressing block 32 is slidably connected to the reversing rod 31, and the pressing block 32 is positioned between the first check ring 33 and the second check ring 34, namely, the pressing block 32 can slide along the reversing rod 31 between the first check ring 33 and the second check ring 34, a first emergency elastic piece 35 is arranged between the first check ring 33 and the pressing block 32, a second emergency elastic piece 36 is arranged between the second check ring 34 and the pressing block 32, and the pressing block 32 is connected with the piston rod 22 of the hydraulic cylinder 2; the check ring limiting piece is used for limiting the moving range of the reversing rod 31 through being matched with the first check ring 33 and the second check ring 34 so as to drive the valve core rod 12 of the reversing valve 1 to move and control the on-off of the reversing valve 1. The hydraulic circuit 100 of the wave energy device is connected with the hydraulic cylinder 2 and the reversing valve 1 through the circuit on-off assembly 3, the hydraulic circuit can be automatically turned on-off without power supply, the control mode is simple, a plurality of groups of hydraulic circuits 100 of the wave energy device can be arranged, and the number of the hydraulic circuits participating in power generation in the wave energy device can be automatically increased or decreased according to the wave conditions.
In this embodiment, the first quick rebound member 35 is a first quick rebound spring, and the first quick rebound spring is sleeved on the reversing lever 31; the second quick rebound member 36 is a second quick rebound spring, and the second quick rebound spring is sleeved on the reversing lever 31.
In this embodiment, the retaining member includes a first pawl 37 and a second pawl 38, the first pawl 37 is mounted on the outer periphery of the reversing lever 31 through a first mounting seat 39, the first pawl 37 is rotationally connected with the first mounting seat 39, and the first pawl 37 is located at one side of the first retaining ring 33 far away from the second retaining ring 34; one end of the first pawl 37, which is far away from the second retainer ring 34, is provided with a two-stage first limit boss 371 for limiting the first retainer ring 33, and one end of the first pawl 37, which is near to the second retainer ring 34, is provided with a first transition surface 372 for the pressing block 32 to slide in; the second pawl 38 is mounted on the periphery of the reversing lever 31 through a second mounting seat 310, the second pawl 38 is rotatably connected with the second mounting seat 310, and the second pawl 38 is positioned on one side of the second retainer ring 34 away from the first retainer ring 33; the end of the second pawl 38 far away from the first retainer ring 33 is provided with a two-stage second limiting boss 381 for limiting the second retainer ring 34, and the end of the second pawl 38 near the first retainer ring 33 is provided with a second transition surface 382 for the pressing block 32 to slide in.
The circuit on-off assembly 3 of this scheme is a kind of quick return mechanism in essence, and it is through the spring force effect of first quick rebound spring or second quick return spring, will commutate the pole 31 and follow slide rail 10 and remove one side to the opposite side rapidly, simultaneously, is spacing to commutate the pole 31 by first pawl 37, second pawl 38 cooperation first retaining ring 33, second retaining ring 34, reaches the purpose of controlling switching-on of switching-over valve 1 through ingenious mechanical structure. As shown in fig. 1, the first pawl 37 and the second pawl 38 are arranged opposite to each other, and two stages of first limit bosses 371 on the first pawl 37 are respectively a left first limit boss and a right first limit boss, as shown in fig. 2, the left first limit boss is located at the left side of the right first limit boss; correspondingly, two-stage second limiting bosses 381 on the second pawl 38 are respectively a left-side second limiting boss and a right-side second limiting boss, and as shown in fig. 2, the left-side second limiting boss is located at the left side of the right-side second limiting boss. The distance that the spool rod 12 moves from the on (off) position to the off (on) position is equal to the distance that the second check ring 34 moves from the second limit boss on the left side of the second pawl 38 to the second limit boss on the right side, and is also equal to the distance that the first pawl 37 moves from the first limit boss on the left side to the first limit boss on the right side. In actual operation, the stroke of the piston rod 22, i.e. the working pressure range of the hydraulic circuit 100 of the wave energy device, can be adjusted by changing the positions of the first mounting seat 39, the first pawl 37, the second pawl 38, the second mounting seat 310 and the positions of the first retainer ring 33, the second retainer ring 34 on the reversing lever 31.
In this embodiment, the reversing valve 1 is preferably a two-position two-way reversing spool valve, which specifically includes a reversing valve body 11 and a spool rod 12, where the spool rod 12 moves linearly in the horizontal direction in the reversing valve body 11 to control the on/off of the hydraulic circuit.
In the present embodiment, a reversing lever slide guide mechanism for guiding the sliding of the reversing lever 31 is also provided in the wave energy device hydraulic circuit 100. The reversing lever sliding guide mechanism can be in various structural forms, such as a single sliding rail structure, a sliding rail and sliding block combined structure or a single sliding groove structure. When the reversing lever sliding guide mechanism is of a single sliding rail structure, the reversing lever 31 can be in sliding fit with the sliding rail structure in a plugging manner; when the reversing rod sliding guide mechanism is of a sliding rail and sliding block combined structure, the sliding rail and sliding block combined structure comprises a sliding rail and a sliding block in sliding fit with the sliding rail, the sliding rail is arranged in parallel with the reversing rod 31, the reversing rod 31 is connected with the sliding block, and the sliding block can be driven to move along the sliding rail matched with the reversing rod 31 when the reversing rod 31 axially moves; when the reversing rod sliding guide mechanism is of a single chute structure, the chute structure is parallel to the reversing rod 31, an arc chute surface with an arc cross section is arranged on the surface of the chute structure, the reversing rod 31 is in contact fit with the arc chute surface, and the reversing rod 31 can move along the length direction of the chute in the arc chute surface when moving, so that guiding is realized. As a preferred scheme, the reversing lever sliding guide mechanism of the scheme adopts a single sliding rail structure, namely a sliding rail 10, as shown in fig. 1, the sliding rail 10 is arranged in parallel with a reversing lever 31, a jack is arranged on the sliding rail 10, the reversing lever 31 is movably inserted into the jack, and when the reversing lever 31 moves, the reversing lever can slide relative to the sliding rail 10 in the jack to realize sliding guide, so that the shifting of the reversing lever 31 and a valve core rod 12 in the moving process is effectively avoided, and the hydraulic circuit is enabled to be failed.
In this embodiment, the piston restoring member 8 is preferably a restoring spring, as shown in fig. 1, 3-5, and is disposed in the hydraulic cylinder body 21 and between the bottom of the hydraulic cylinder body 21 and the piston rod 22. Further, both ends of the return spring are connected to the bottom of the cylinder block 21 and the end of the piston rod 22, respectively.
In this embodiment, a limiting member 9 is further disposed between the bottom of the hydraulic cylinder 21 and the piston rod 22, and the limiting member 9 is disposed on the bottom of the hydraulic cylinder 21 or the piston rod 22 to limit the limit shrinkage displacement of the piston rod 22. The limiting member 9 may be a block structure or a rod structure, and in this embodiment, the limiting member 9 is preferably a rod structure, such as a cylindrical rod, a screw, or a bolt, and is disposed parallel to the piston rod 22. Taking the limiting piece 9 as an example, the limiting piece can be screwed into the cylinder bottom of the hydraulic cylinder body 21 from the outside of the cylinder bottom, and when the end of the piston rod 22 contacts the screw in the retraction process of the piston rod 22, the screw can prevent the piston rod 22 from continuously retracting, so that the piston rod 22 is prevented from excessively retracting and damaging the reversing valve 1. The limiting piece 9 is arranged as the screw, so that the limiting node of the limiting piece can be adjusted according to the strokes of different reversing valves 1, namely, the screw can be screwed in or out of the bottom of the hydraulic cylinder body 21 according to actual requirements, and the purpose of adjusting the retraction limit displacement of the piston rod 22 is achieved, so that the hydraulic reversing valve is more flexible to use.
The working principle of the wave energy device hydraulic circuit 100 according to the present embodiment will be specifically described.
The hydraulic oil source 400 is connected with a liquid inlet of the reversing valve 1 and a liquid inlet (outlet) of a rod cavity of the hydraulic cylinder 2, a liquid outlet of the reversing valve 1 is connected with a liquid inlet of the hydraulic motor 4, the hydraulic motor 4 is connected with the generator 7 through the coupler 6, and a liquid outlet of the hydraulic motor 4 is connected with the oil tank 5. The piston rod 22 of the hydraulic cylinder 2 is arranged in parallel with the valve core rod 12 of the reversing valve 1, and the end part of the piston rod 22 is connected with a pressing block 32 on the reversing rod 31.
When the hydraulic oil pressure supplied from the hydraulic oil source 400 is at the set minimum operating pressure, the piston rod 22 is at the right limit position as shown in fig. 1, the spool rod 12 is in the left open state, and the generator 7 does not generate electricity. The wave energy device starts energy storage under the action of wave energy, the hydraulic oil pressure provided by the hydraulic oil source 400 is slowly increased, the piston rod 22 drives the pressing block 32 to gradually move left under the action of hydraulic oil, the first quick rebound spring positioned at the left side of the pressing block 32 is gradually compressed under the action of the pressing block 32, when the hydraulic oil pressure reaches the set highest working pressure, the pressing block 32 slides into the first pawl 37 through the first transition surface 372 and turns the first pawl 37 anticlockwise, the right end of the first pawl 37 is completely lifted, the reversing rod 31 rapidly moves left along the sliding rail 10 under the action of the spring force of the first quick rebound spring, the first check ring 33 moves from the first limit boss at the right side of the first pawl 37 to the first limit boss at the left side, the second check ring 34 moves from the second limit boss at the right side of the second pawl 38 to the second limit boss at the left side, the spool rod 12 is jointly limited by the second limit rod 31, the spool rod 12 follows the reversing rod 31 to complete left movement, the spool rod 31 is in a right-position passage state, the hydraulic motor 4 starts rotating under the action of hydraulic oil and drives the generator 7 to start generating electricity.
As the hydraulic oil pressure slowly decreases, the piston rod 22 is pushed by the spring force of the piston resetting piece 8 to gradually move right by the pressing block 32, the second quick rebound spring is gradually compressed by the pressing block 32, when the hydraulic oil pressure reaches the set lowest working pressure, the pressing block 32 slides into the second pawl 38 through the second transition surface 382 and turns the second pawl 38 clockwise, the left end of the second pawl 38 is completely lifted, the reversing rod 31 is quickly moved right along the sliding rail 10 under the spring force of the second quick rebound spring, the second check ring 34 moves from the left second limit boss to the right second limit boss of the second pawl 38, the first check ring 33 moves from the left first limit boss to the right first limit boss of the first pawl 37 together to limit the reversing rod 31, the valve core rod 12 completes the right movement along with the reversing rod 31, the left open circuit state is achieved, the generator 7 stops generating electricity, and the wave energy device starts to store energy again.
Therefore, the hydraulic circuit 100 of the wave energy device provided by the technical scheme is characterized in that the hydraulic cylinder 2 is connected with the reversing valve 1 through the emergency return mechanism of the circuit on-off assembly 3, so that not only is the control mode of on-off of the hydraulic circuit simplified, but also the electric power supply and the corresponding electric control system are not needed, the cost is reduced, and the working pressure range of the hydraulic circuit can be adjusted according to actual requirements; meanwhile, when the wave condition of the sea area where the wave energy device is located is general, a single group of wave energy device hydraulic circuits 100 can be used for generating electricity independently, and when the wave condition is better, a plurality of groups of wave energy device hydraulic circuits 100 can be used jointly for generating electricity together so as to fully utilize wave energy.
Example two
The present embodiment also proposes a wave power hydraulic system 200, which includes a hydraulic oil source 400 and a plurality of sets of wave power device hydraulic circuits 100 as disclosed in embodiment one, wherein one set of wave power device hydraulic circuits 100 is connected with the hydraulic oil source 400 as a primary hydraulic circuit, and the other sets of wave power device hydraulic circuits 100 are respectively used as a secondary hydraulic circuit and a tertiary hydraulic circuit.
The number of the wave energy device hydraulic circuits 100 in the wave energy power generation hydraulic system 200 can be increased or decreased according to actual wave conditions, and specifications, dimensions and the like of each component in any wave energy device hydraulic circuit 100 can be selected according to actual requirements.
The following takes the example that the wave energy power hydraulic system 200 includes two sets of wave energy device hydraulic circuits 100, and the structural arrangement and the use principle thereof will be specifically described.
As shown in fig. 3 to 5, one set of wave energy device hydraulic circuits 100 in the two sets of wave energy device hydraulic circuits 100 in the wave energy power generation hydraulic system 200 is used as a primary hydraulic circuit to be connected with the hydraulic oil source 400, the other set of wave energy device hydraulic circuits 100 is used as a secondary hydraulic circuit to be connected with the hydraulic oil source 400 through the check valve 300 and is positioned at the downstream of the primary hydraulic circuit, and the liquid inlet of the check valve 300 is also communicated with the hydraulic cylinder 2 of the primary hydraulic circuit. The reversing valves 1 in the two-stage hydraulic circuits are all connected with a generator 7 through a hydraulic motor 4.
The liquid inlet of the check valve 300 is connected with the hydraulic oil source 400 and the hydraulic cylinder 2 in the primary hydraulic circuit, the liquid outlet of the check valve 300 is connected with the liquid inlet of the reversing valve 1 in the secondary hydraulic circuit and the liquid inlet (outlet) of the rod cavity of the hydraulic cylinder 2, and the check valve 300 is used for preventing the oil in the secondary hydraulic circuit from flowing back to the primary hydraulic circuit. The minimum operating pressure of the secondary hydraulic circuit is equal to or slightly greater than the maximum operating pressure of the primary hydraulic circuit.
When in operation, the device comprises: when the hydraulic oil pressure provided by the hydraulic oil source 400 is at the set lowest working pressure of the primary hydraulic circuit, the piston rod 22 is at the right limit position, the valve core rod 12 is in the left open state, the generator 7 of the primary hydraulic circuit does not generate electricity, the liquid outlet pressure of the check valve 300 is larger than the liquid inlet pressure of the primary hydraulic circuit at the moment because the lowest working pressure of the secondary hydraulic circuit is equal to or slightly larger than the highest working pressure of the primary hydraulic circuit, the check valve 300 is not conducted and is in the closed state, the generator 7 of the secondary hydraulic circuit does not generate electricity, and the piston rod 22 of the secondary hydraulic circuit is assumed to be at the right limit position at the moment, and the structure of each stage of hydraulic circuit is shown in fig. 3.
The wave energy device starts energy storage under the action of wave energy, the hydraulic oil pressure that the hydraulic oil source 400 provided slowly increases, in the primary hydraulic circuit, piston rod 22 is driven briquetting 32 to gradually move left under the action of hydraulic oil, the first quick rebound spring that is located briquetting 32 left side is compressed gradually under the action of briquetting 32, when hydraulic oil pressure reaches the highest operating pressure of settlement, briquetting 32 slides into first pawl 37 through first changeover surface 372, and overturn first pawl 37 anticlockwise, the right-hand member of first pawl 37 is lifted completely, reversing lever 31 is moved left rapidly along slide rail 10 under the action of the spring force of first quick rebound spring, first retaining ring 33 moves to left first spacing boss from the right side first spacing boss of first pawl 37, second retaining ring 34 moves to left second spacing boss from the right side second spacing boss of second pawl 38, the cooperation is spacing with reversing lever 31, spool rod 12 follows reversing lever 31 and accomplishes the action of moving left, be in right-hand path state, hydraulic motor 4 begins to rotate and drive generator 7 begins the electricity generation under the action of hydraulic oil. If the wave condition is normal, the hydraulic oil pressure will not be increased, the check valve 300 is not conducted and still is in the closed state, the hydraulic oil does not flow into the secondary hydraulic circuit, and the structure of each stage of hydraulic circuit is shown in fig. 4.
As the pressure of the hydraulic oil slowly decreases, in the primary hydraulic circuit, the piston rod 22 is pushed by the spring force of the piston return member 8, the pressing block 32 gradually moves to the right, the second quick rebound spring is gradually compressed by the action of the pressing block 32, when the pressure of the hydraulic oil reaches the set lowest working pressure of the primary hydraulic circuit, the pressing block 32 slides into the second pawl 38 through the second transition surface 382, the second pawl 38 is turned clockwise, the left end of the second pawl 38 is completely lifted, the reversing rod 31 is quickly moved to the right along the sliding rail 10 under the action of the spring force of the second quick rebound spring, the second retainer ring 34 moves from the left second limit boss of the second pawl 38 to the right second limit boss, the first retainer ring 33 moves from the left first limit boss of the first pawl 37 to the right first limit boss, the reversing rod 31 is jointly limited, the valve core rod 12 completes the right movement along with the reversing rod 31, and the reversing rod 31 is in the left open circuit state, and the structure of each stage of the hydraulic circuit is as shown in fig. 3.
If the wave condition is better in the power generation process of the generator 7 of the primary hydraulic circuit, the pressure of the hydraulic oil is still continuously increased, the piston rod 22 of the primary hydraulic circuit is not moved leftwards under the action of the limiting piece 9, when the pressure of the hydraulic oil exceeds the set lowest working pressure of the secondary hydraulic circuit, the liquid inlet pressure of the check valve 300 is larger than the liquid outlet pressure of the check valve 300, the check valve 300 is conducted to be in an open state, the hydraulic oil starts to flow into the hydraulic cylinder 2 in the secondary hydraulic circuit, and the rod cavity liquid inlet (outlet) is arranged in the hydraulic cylinder 2, and is influenced by the wave condition.
When the pressure of the hydraulic oil reaches the highest working pressure of the set secondary hydraulic circuit, the generator 7 of the secondary hydraulic circuit starts to generate electricity, and the working principle is the same in the same secondary hydraulic circuit, at this time, the generator 7 of the primary hydraulic circuit and the generator 7 of the secondary hydraulic circuit jointly generate electricity so as to match the wave energy input by the wave energy device, and the structure of each secondary hydraulic circuit is shown in fig. 5.
When the pressure of the hydraulic oil is reduced to the set lowest working pressure of the secondary hydraulic circuit, the generator 7 in the secondary hydraulic circuit stops generating electricity, the working principle is that the generator 7 in the primary hydraulic circuit generates electricity alone at the same time, if the wave condition is common at this time, the check valve 300 is closed, the hydraulic oil source 400 stops providing oil to the secondary hydraulic circuit, and the structure of each stage of hydraulic circuit is shown in fig. 4. When the pressure of the hydraulic oil is reduced to the lowest working pressure of the set primary hydraulic circuit, the generator 7 of the primary hydraulic circuit stops generating electricity, the wave energy device starts to store energy again, and the structure of each stage of hydraulic circuit is shown in fig. 3.
If the generator 7 of the secondary hydraulic circuit stops generating electricity, the wave condition is still better, and the hydraulic oil source 400 continues to provide oil to the secondary hydraulic circuit so as to generate electricity again by the generator 7 of the secondary hydraulic circuit.
If the wave condition is excellent in the power generation process of the generator 7 in the secondary hydraulic circuit, the pressure of hydraulic oil is continuously increased, and the tertiary hydraulic circuit can be additionally arranged to fully utilize wave energy resources.
Therefore, the hydraulic circuit 100 of the wave energy device provided by the technical scheme is characterized in that the hydraulic cylinder 2 is connected with the reversing valve 1 through the emergency return mechanism of the circuit on-off assembly 3, so that not only is the control mode of on-off of the hydraulic circuit simplified, but also the electric power supply and the corresponding electric control system are not needed, the cost is reduced, and the working pressure range of the hydraulic circuit can be adjusted according to actual requirements; meanwhile, when the wave condition of the sea area where the wave energy device is located is general, a single group of wave energy device hydraulic circuits 100 can be used for generating electricity independently, and when the wave condition is better, a plurality of groups of wave energy device hydraulic circuits 100 can be used jointly for generating electricity together so as to fully utilize wave energy.
It should be noted that it will be apparent to those skilled in the art that the present invention is not limited to the details of the above-described exemplary embodiments, but may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
The principles and embodiments of the present invention have been described in detail with reference to specific examples, which are provided to facilitate understanding of the method and core ideas of the present invention; also, it is within the scope of the present invention to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the invention.
Claims (7)
1. The hydraulic loop of the wave energy device is characterized by comprising a reversing valve, a hydraulic cylinder and a loop on-off assembly, wherein a liquid inlet of the reversing valve is used for being connected with a hydraulic oil source, and a liquid outlet of the reversing valve is sequentially connected with a hydraulic motor and an oil tank, wherein the hydraulic motor is used for being connected with a generator; the rod cavity of the hydraulic cylinder is used for being connected with a hydraulic oil source, and the rodless cavity of the hydraulic cylinder is provided with a piston resetting piece which can provide restoring force for a piston rod; the loop on-off assembly comprises a reversing rod, a pressing block, a first check ring, a second check ring and a check ring limiting piece; the reversing rod is coaxially connected with a valve core rod of the reversing valve, the first check ring and the second check ring are sleeved on the reversing rod, the pressing block is slidably connected to the reversing rod, the pressing block is located between the first check ring and the second check ring, a first emergency elastic piece is arranged between the first check ring and the pressing block, a second emergency elastic piece is arranged between the second check ring and the pressing block, and the pressing block is connected with a piston rod of the hydraulic cylinder; the retaining ring locating part is used for limiting the movement range of the reversing lever through being matched with the first retaining ring and the second retaining ring so as to control the on-off of the reversing valve, wherein:
the first quick rebound spring is sleeved on the reversing rod; the second quick rebound spring is sleeved on the reversing rod;
the check ring limiting piece comprises a first pawl and a second pawl, the first pawl is arranged on the periphery of the reversing rod through a first mounting seat, the first pawl is rotationally connected with the first mounting seat, and the first pawl is positioned on one side, far away from the second check ring, of the first check ring; one end of the first pawl, which is far away from the second check ring, is provided with two stages of first limiting bosses used for limiting the first check ring, and one end of the first pawl, which is close to the second check ring, is provided with a first transition surface for the pressing block to slide in; the second pawl is arranged on the periphery of the reversing rod through a second mounting seat, the second pawl is rotationally connected with the second mounting seat, and the second pawl is positioned on one side, far away from the first check ring, of the second check ring; one end, far away from the first check ring, of the second pawl is provided with two stages of second limiting bosses used for limiting the second check ring, and one end, close to the first check ring, of the second pawl is provided with a second transition surface for the pressing block to slide in;
and a limiting piece is arranged between the cylinder bottom in the hydraulic cylinder and the piston rod, and the limiting piece is arranged on the cylinder bottom in the hydraulic cylinder or the piston rod so as to limit the displacement of the piston rod.
2. The wave energy device hydraulic circuit of claim 1, wherein the reversing valve is a two-position two-way reversing spool valve.
3. The wave energy device hydraulic circuit of claim 1, further comprising a reversing lever slide guide mechanism for guiding the sliding of the reversing lever.
4. A wave energy device hydraulic circuit according to claim 3, wherein the reversing lever sliding guide mechanism comprises a sliding rail arranged parallel to the reversing lever, the reversing lever being in sliding engagement with the sliding rail.
5. The wave energy device hydraulic circuit of claim 1, wherein the piston return is a return spring disposed within a rodless cavity of the hydraulic cylinder and between a cylinder bottom of the hydraulic cylinder and the piston rod.
6. A wave energy power generation hydraulic system, comprising a hydraulic oil source and a plurality of groups of wave energy device hydraulic circuits according to any one of claims 1-5, wherein one group of wave energy device hydraulic circuits is connected with the hydraulic oil source as a primary hydraulic circuit, the other groups of wave energy device hydraulic circuits are connected with the hydraulic oil source through one-way valves and are sequentially positioned at the downstream of the primary hydraulic circuit, the liquid inlets of the one-way valves corresponding to the other groups of wave energy device hydraulic circuits except the primary hydraulic circuit are respectively communicated with the hydraulic cylinders of the wave energy device hydraulic circuits at the adjacent upstream, and the one-way valves are used for preventing the backward flow of oil in the corresponding wave energy device hydraulic circuits to the upstream wave energy device hydraulic circuits.
7. The wave energy power hydraulic system of claim 6, comprising two sets of the wave energy device hydraulic circuits, wherein one set of the wave energy device hydraulic circuits is connected as a primary hydraulic circuit to the hydraulic oil source and the other set of the wave energy device hydraulic circuits is connected as a secondary hydraulic circuit to the hydraulic oil source through a one-way valve and is located downstream of the primary hydraulic circuit, and wherein a fluid inlet of the one-way valve is also in communication with the hydraulic cylinder of the primary hydraulic circuit.
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| CN202310547412.6A CN116292486B (en) | 2023-05-16 | 2023-05-16 | Wave energy device hydraulic circuit and wave energy power generation hydraulic system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4490621A (en) * | 1982-04-14 | 1984-12-25 | Muroran Institute Of Technology | Method and apparatus for generating electric power by waves |
| CN107345532A (en) * | 2017-08-31 | 2017-11-14 | 西京学院 | A kind of Stroke Control automatic reverse hydraulic circuit |
| CN109741977A (en) * | 2019-02-28 | 2019-05-10 | 福州大学 | A kind of quick switching device and its working method of reverse control switch |
| WO2020069669A1 (en) * | 2018-10-03 | 2020-04-09 | 曲言明 | Buoyant force unidirectional action wave power generator |
| CN115095557A (en) * | 2022-06-06 | 2022-09-23 | 中国科学院广州能源研究所 | Indirect type hydraulic load grading control system and method for wave energy device |
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2023
- 2023-05-16 CN CN202310547412.6A patent/CN116292486B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4490621A (en) * | 1982-04-14 | 1984-12-25 | Muroran Institute Of Technology | Method and apparatus for generating electric power by waves |
| CN107345532A (en) * | 2017-08-31 | 2017-11-14 | 西京学院 | A kind of Stroke Control automatic reverse hydraulic circuit |
| WO2020069669A1 (en) * | 2018-10-03 | 2020-04-09 | 曲言明 | Buoyant force unidirectional action wave power generator |
| CN109741977A (en) * | 2019-02-28 | 2019-05-10 | 福州大学 | A kind of quick switching device and its working method of reverse control switch |
| CN115095557A (en) * | 2022-06-06 | 2022-09-23 | 中国科学院广州能源研究所 | Indirect type hydraulic load grading control system and method for wave energy device |
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| CN116292486A (en) | 2023-06-23 |
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