Integrated wave energy power generation device and working method thereof

Abstract

The present application relates to a kind of integrated wave energy power generation device and its working method, belong to new energy wave energy utilization field.The present application includes floater module and stator module, stator module will energy recovery cabin, power generation cabin, high-low pressure accumulator cabin, battery pack and electric processing cabin each cabin integration processing in one, can realize the free disassembly maintenance of each module of power generation device.The present application utilizes the heaving motion of floater to obtain wave energy, floater is directly connected with the piston rod of primary hydraulic cylinder;The hollow piston rod of primary hydraulic cylinder is used as the cylinder barrel of secondary hydraulic cylinder, and energy is recovered with the movement of floater and converted into mechanical energy;Composite recovery cylinder contains A, B, C three cavities, A, B cavity is respectively connected with check valve bridge, in addition a group of high, low accumulator cabin, a sequence valve and a quantitative bidirectional motor constitute a closed hydraulic drive circuit, drive generator work power generation output to battery pack and electric processing cabin output stable current.

Description

Technical Field

[0001] This invention relates to an integrated wave energy power generation device and its working method, belonging to the field of new energy wave energy utilization technology. Background Technology

[0002] With socio-economic development, the demand for energy is increasing daily, while the world's traditional fossil fuel resources are dwindling, leading to a growing energy crisis. The combustion of fossil fuels also releases large amounts of harmful substances, contributing to global warming and triggering a series of environmental problems. To effectively address the increasingly serious energy and environmental issues, developing and utilizing renewable energy sources has become a consensus for sustainable development.

[0003] The ocean, which covers about 71% of the Earth's surface, contains vast reserves of renewable energy, with a theoretical value of up to 2.1 × 10⁶ TW·h, mainly in the form of ocean wind energy, wave energy, and tidal energy. Wave energy has the highest energy density among all renewable energy sources, with concentrated energy distribution, high theoretical energy capture efficiency, and long effective energy production time, making it a research hotspot for renewable energy utilization in various countries.

[0004] Currently existing wave energy generation devices are mostly inefficient, have a narrow range of applications, and are complex in structure, costly, and difficult to maintain, making it difficult to industrialize wave energy generation devices. In the field of wave energy utilization, power generation devices using miniaturized integrated design methods are still relatively rare.

[0005] Chinese patent document CN 108240280A discloses an "Integrated System of Ultra-Large Floating Platform and Wave Energy Device Based on Modularity". This patent includes large and small platform modules, tension leg system, platform inter-platform cover plate, oscillating float wave energy generation device, etc. The oscillating float wave energy generation device converts the oscillation of the float into the horizontal movement of the piston rod through gear and rack transmission, driving the hydraulic motor to generate electricity. This patent is a large-scale design with a relatively complex device structure, high maintenance costs, and difficulty in realizing industrialized power generation. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides an integrated wave energy power generation device and its operating method. The modular design and miniaturization of the device can effectively reduce manufacturing, maintenance, and power generation costs, which is conducive to the industrialization of wave energy power generation devices.

[0007] The present invention adopts the following technical solution:

[0008] An integrated wave energy power generation device includes a float module and a stator module. The stator module is formed by integrating an energy recovery chamber, a power generation chamber, a high-voltage energy storage chamber, a low-voltage energy storage chamber, a battery pack, and an electrical processing chamber into one unit.

[0009] The energy recovery chamber includes a composite recovery cylinder, which consists of two hydraulic cylinders: a primary hydraulic cylinder and a secondary hydraulic cylinder. The piston rod of the primary hydraulic cylinder is hollow and also serves as the cylinder barrel of the secondary hydraulic cylinder. The piston rod of the primary hydraulic cylinder is directly connected to the float module and can move with the float module. The piston rod of the secondary hydraulic cylinder is also hollow and is fixed to the cylinder barrel of the primary hydraulic cylinder. It is worth noting that the piston rod of the secondary hydraulic cylinder is not connected to the cylinder barrel of the primary hydraulic cylinder, but is connected to the piston rod of the primary hydraulic cylinder. The hollow parts of the rods are connected. The upper and lower parts of the piston of the first-stage hydraulic cylinder form chamber A and chamber C respectively. The hollow part of the piston rod of the first-stage hydraulic cylinder is connected to the hollow part of the piston rod of the second-stage hydraulic cylinder, forming chamber B. When the piston rod of the first-stage hydraulic cylinder moves up and down with the float module, it will drive the piston of the first-stage hydraulic cylinder to move up and down, thereby changing the size of chamber A and chamber B and pressing out the hydraulic oil. This process can convert wave energy into the mechanical energy of the piston rod movement of the composite hydraulic cylinder. The effective areas of chamber A, chamber B and chamber C in this invention are different.

[0010] The power generation compartment includes a check valve bridge, a sequence valve, a bidirectional quantitative motor, and a generator. Both the high-pressure accumulator compartment and the low-pressure accumulator compartment are equipped with moving pistons. The upper part of the moving pistons in the high-pressure accumulator compartment and the low-pressure accumulator compartment is filled with nitrogen gas at different pressures, and the lower part is filled with hydraulic oil. The high-pressure accumulator compartment and the low-pressure accumulator compartment play a regulating role in peak shaving and valley filling during operation.

[0011] Chambers A and B are connected to the upper and lower interfaces of the check valve bridge via working oil pipes, respectively. The left interface of the check valve bridge is connected to the lower part of the high-pressure accumulator compartment via a working oil pipe, and at the same time, the left interface is connected to the bidirectional quantitative motor via a sequence valve, driving the bidirectional quantitative motor to rotate forward. The right interface of the check valve bridge is connected to the lower part of the low-pressure accumulator compartment via a working oil pipe, and at the same time, the right interface is connected to the bidirectional quantitative motor, driving the bidirectional quantitative motor to rotate forward. The bidirectional quantitative motor is connected to the generator, driving the generator to work. The generator is connected to the battery pack and the power processing compartment. The generator compartment is connected to the battery pack and the power processing compartment via the generator output line for further rectification, inversion, and storage, outputting stable electrical energy.

[0012] Preferably, the check valve bridge is composed of four check valves, namely a first check valve, a second check valve, a third check valve, and a fourth check valve, which are respectively located between the upper and left interfaces, between the left and lower interfaces, between the lower and right interfaces, and between the right and upper interfaces of the check valve bridge, ensuring that hydraulic oil can only flow from the upper interface to the left interface, from the lower interface to the left interface, from the right interface to the lower interface, and from the right interface to the upper interface.

[0013] Preferably, the C-cavity is not vented with oil, and a pair of symmetrical springs are installed inside the C-cavity. The bottom of the springs is fixed to the bottom of the composite recovery cylinder, and the top of the springs is connected to the piston of the first-stage hydraulic cylinder, so that the piston can maintain balance in the middle position when there are no waves. The middle position refers to the middle position of the vertical height of the composite recovery cylinder.

[0014] Preferably, there are two springs, namely a left spring and a right spring, one end of which is fixedly installed at the bottom of the cylinder and located on the left and right sides of the C cavity, respectively.

[0015] Preferably, the upper pressure of the high-pressure accumulator chamber is usually set according to the sea state, and the purpose of the low-pressure accumulator chamber is to fill the cavity with liquid. The pressure of nitrogen gas filling the upper part of the moving piston of the high-pressure accumulator chamber is above 8 MPa, and the pressure of nitrogen gas filling the upper part of the moving piston of the low-pressure accumulator chamber is generally below 1 MPa, preferably 0.3 to 0.5 MPa.

[0016] When the energy recovery chamber, power generation chamber, high-pressure accumulator chamber, and low-pressure accumulator chamber work together, they form a simple, efficient, energy-saving, and stable closed-loop wave power generation hydraulic system, eliminating the need for an oil tank and reducing the overall size of the power generation device.

[0017] Preferably, the float module is a float that floats on the water surface, and the rest of the device is integrated into the stator module. The float can directly contact the waves and capture energy by oscillating with the waves. The piston rod of the first-stage hydraulic cylinder is directly connected to the float.

[0018] Preferably, the float is a cylindrical float.

[0019] Preferably, the shells of the energy recovery chamber, power generation chamber, high-voltage energy storage chamber, low-voltage energy storage chamber, battery pack and electrical processing chamber are all made of corrosion-resistant alloy material, and the outer surface of the shells is coated with anti-corrosion paint.

[0020] Each compartment is integrated into a stator module. The outer shell of the stator module is also made of alloy material and has a closed structure, which effectively prevents seawater corrosion. The outer surface of the compartment shell is coated with anti-corrosion paint.

[0021] Preferably, the corrosion-resistant alloy material can be cast titanium ZT, NH55, etc., and the anti-corrosion coating is preferably ZS-711 inorganic anti-corrosion coating.

[0022] In one of the above-mentioned integrated wave energy power generation devices, when the wave pushes the float to rise, the piston rod of the first-stage hydraulic cylinder moves upward accordingly. The hydraulic oil in chamber A is compressed and flows out. The hydraulic oil flows through the working oil circuit in sequence through the upper interface of the check valve bridge, the branch where the first check valve is located, and the sequence valve drives the bidirectional quantitative motor to rotate forward. Then, it enters chamber B through the right interface of the check valve bridge and the branch where the third check valve is located. During the rising process, neither the left spring nor the right spring participates.

[0023] As the wave pushes the float downwards, the piston rod of the first-stage hydraulic cylinder moves downwards accordingly. Hydraulic oil is compressed and flows out of chamber B. The hydraulic oil flows through the working oil circuit in sequence through the lower interface of the check valve bridge, the branch where the second check valve is located, and the sequence valve drives the bidirectional quantitative motor to rotate forward. Then, it enters chamber A through the right interface of the check valve bridge and the branch where the fourth check valve is located. During the descent, the spring is compressed, accumulating some elastic potential energy for the ascent phase.

[0024] Preferably, when the wave pushes the float up, and the wave is large, the oil output of chamber A is large, the instantaneous pressure of the working oil pipe is too high, a part of the hydraulic oil enters chamber B, and the remaining hydraulic oil enters the lower part of the low-pressure accumulator chamber through the working oil pipe. At this time, the low-pressure accumulator chamber plays the role of oil suction, buffering and energy storage. When the inlet pressure of the sequence valve of the present invention reaches a certain value, it opens to ensure that the bidirectional quantitative motor has a certain working opening pressure.

[0025] When the waves push the float up, if the waves are small, the instantaneous oil output of chamber A is insufficient to reach the working oil pressure of the system. At this time, the oil output from the lower part of the high-pressure accumulator compartment is supplied to the sequence valve and the bidirectional quantitative motor through the working oil circuit to maintain the stability of the working oil pressure, ensure that the bidirectional quantitative motor works continuously and has a relatively stable output, and prevent the instantaneous voltage value from being too high or too low.

[0026] In a further preferred embodiment, when the waves push the float down and the waves are large, the oil output of chamber B is large, the instantaneous pressure of the working oil pipe is too high, a part of the hydraulic oil enters chamber A, and the remaining hydraulic oil enters the lower part of the low-pressure accumulator compartment through the working oil pipe.

[0027] When the waves push the float down, if the waves are small, the instantaneous oil output of chamber B is insufficient and cannot reach the working oil pressure of the system. At this time, the oil output from the lower part of the high-pressure accumulator compartment is supplied to the sequence valve and the bidirectional quantitative motor through the working oil circuit to maintain the stability of the working oil pressure.

[0028] Throughout the ascent and descent process, the high-pressure accumulator compartment and the low-pressure accumulator compartment work together as components in the hydraulic system to store and release pressure energy. They can also serve as auxiliary components for short-term oil supply and absorption of system vibration and shock.

[0029] During the energy recovery process, the check valve bridge can act as a rectifier, ensuring that the bidirectional quantitative motor maintains unidirectional rotation, driving the generator to rotate. The electrical energy generated by the generator is transmitted through the generator output line to the battery pack and the electrical processing compartment for further rectification, inversion, and storage, outputting stable electrical energy.

[0030] It is worth noting that the specific methods by which the battery pack and electrical processing compartment rectify, invert, and store the electrical energy output from the generator are existing technologies and will not be elaborated here.

[0031] Where this invention is not detailed, existing technologies may be used.

[0032] The beneficial effects of this invention are as follows:

[0033] 1) This invention adopts a modular design and uses the heave motion of the float module to collect wave energy. Wave energy can be collected during both the rising and falling phases of the float module, which has the characteristic of two-way wave energy collection. The device of this invention does not require any external reference point, but only relies on the relative motion between the float module and the internal components.

[0034] 2) This invention seals each compartment of the underwater stator module separately and then integrates them into one unit. If a single compartment has a problem, only the corresponding compartment of the corresponding module needs to be removed for repair, which facilitates the disassembly, repair and installation of each module of the power generation device.

[0035] 3) This invention uses a composite recovery cylinder, eliminating the need for an oil tank. This invention is a simple, efficient, energy-saving, and stable hydraulic system for wave power generation, which greatly reduces the size of the wave power generation device.

[0036] 4) The C cavity of the present invention is equipped with symmetrical springs, which enable the recovery cylinder to maintain a neutral position in calm sea conditions, and has a two-way wave energy collection feature to ensure energy recovery rate.

[0037] 5) The stator module of the integrated wave energy power generation device of the present invention is closed, which has a strong ability to resist natural disasters; each chamber is made of corrosion-resistant alloy material, which can effectively prevent seawater corrosion; the outer shell of the chamber adopts surface coating technology to solve the problem of biological adhesion and greatly enhance the adaptability to the marine environment.

[0038] 6) The power generation device of the present invention adopts a modular design, and its miniaturization and integration can effectively reduce manufacturing, maintenance and power generation costs, which is conducive to the industrialization of wave energy power generation devices. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the integrated wave energy generation device of the present invention;

[0040] Among them, 1-float module, 2-stator module, 3-battery pack and electrical processing compartment, 4-sequence valve, 5-check valve bridge, 6-A chamber, 7-piston rod of the first-stage hydraulic cylinder, 8-nitrogen gas filled into the high-pressure accumulator compartment, 9-nitrogen gas filled into the low-pressure accumulator compartment, 10-generator, 11-bidirectional fixed displacement motor, 12-left spring, 13-Cavity C, 14-B chamber, 15-right spring, 16-high-pressure accumulator compartment, 17-low-pressure accumulator compartment, 18-working oil pipe, 19-generator output line, 20-piston rod of the second-stage hydraulic cylinder, 21-piston of the first-stage hydraulic cylinder, 22-moving piston, 23-first check valve, 24-second check valve, 25-third check valve, 26-fourth check valve. Detailed implementation method:

[0041] To make the technical problems, technical solutions and advantages of the present invention clearer, a detailed description will be given below in conjunction with the accompanying drawings and specific embodiments. However, this description is not limited thereto. All aspects not described in detail in the present invention are based on conventional techniques in the field.

[0042] Example 1:

[0043] An integrated wave energy power generation device, such as Figure 1 As shown, it includes a float module 1 and a stator module 2. The stator module 2 is formed by integrating an energy recovery chamber, a power generation chamber, a high-voltage accumulator chamber 16, a low-voltage accumulator chamber 17, a battery pack, and an electrical processing chamber 3 into one unit.

[0044] The energy recovery chamber includes a composite recovery cylinder, which consists of two hydraulic cylinders: a primary hydraulic cylinder and a secondary hydraulic cylinder. The piston rod 7 of the primary hydraulic cylinder is hollow and also serves as the cylinder barrel of the secondary hydraulic cylinder. The piston rod 7 of the primary hydraulic cylinder is directly connected to the float module 1 and can move with the movement of the float module 1. The piston rod 20 of the secondary hydraulic cylinder is also hollow, with its upper and lower ends fixed to the cylinder barrel of the primary hydraulic cylinder. It is worth noting that the piston rod 20 of the secondary hydraulic cylinder is not connected to the cylinder barrel of the primary hydraulic cylinder, but is connected to the cylinder barrel of the primary hydraulic cylinder. The hollow parts of the piston rod 7 of the hydraulic cylinder are connected. The upper and lower parts of the piston 21 of the first-stage hydraulic cylinder form chamber A 6 and chamber C 13 respectively. The hollow part of the piston rod 7 of the first-stage hydraulic cylinder is connected to the hollow part of the piston rod 20 of the second-stage hydraulic cylinder, forming chamber B 14. When the piston rod 7 of the first-stage hydraulic cylinder moves up and down with the float module 1, it will drive the piston 21 of the first-stage hydraulic cylinder to move up and down, thereby changing the size of chamber A 6 and chamber B 14 and expelling hydraulic oil. This process can convert wave energy into the mechanical energy of the piston rod movement of the composite hydraulic cylinder.

[0045] The power generation compartment includes a check valve bridge 5, a sequence valve 4, a bidirectional quantitative motor 11, and a generator 10. Both the high-voltage accumulator compartment 16 and the low-voltage accumulator compartment 17 are equipped with moving pistons 22. The upper part of the moving pistons in the high-voltage accumulator compartment 16 and the low-voltage accumulator compartment 17 is filled with nitrogen gas at different pressures, and the lower part is filled with hydraulic oil. The high-voltage accumulator compartment 16 and the low-voltage accumulator compartment 17 play a role in peak shaving and valley filling during operation.

[0046] Chamber A 6 and Chamber B 14 are connected to the upper and lower interfaces of the check valve bridge 5 respectively via working oil pipes. The left interface of the check valve bridge 5 is connected to the lower part of the high-pressure accumulator compartment 16 via a working oil pipe. At the same time, the left interface is also connected to the bidirectional quantitative motor 11 via a sequence valve 4, driving the bidirectional quantitative motor 11 to rotate forward. The right interface of the check valve bridge 5 is connected to the lower part of the low-pressure accumulator compartment 17 via a working oil pipe 18. At the same time, the right interface is also connected to the bidirectional quantitative motor 11, driving the bidirectional quantitative motor 11 to rotate forward. The bidirectional quantitative motor 11 is connected to the generator 10, driving the generator 10 to work. The generator 10 is connected to the battery pack and the electrical processing compartment 3. The generator compartment is connected to the battery pack and the electrical processing compartment via the generator output line 19 for further rectification, inversion, and storage, outputting stable electrical energy.

[0047] Example 2:

[0048] An integrated wave energy power generation device is described in Embodiment 1, except that the check valve bridge 5 is composed of four one-way valves. The four one-way valves are a first one-way valve 23, a second one-way valve 24, a third one-way valve 25, and a fourth one-way valve 26, which are located between the upper and left interfaces, the left and lower interfaces, the lower and right interfaces, and the right and upper interfaces, respectively. This ensures that hydraulic oil can only flow from the upper interface to the left interface, from the lower interface to the left interface, from the right interface to the lower interface, and from the right interface to the upper interface.

[0049] Example 3:

[0050] An integrated wave energy power generation device is described in Embodiment 1, except that the C cavity 13 is not vented with oil, and a left-right symmetrical spring is installed inside the C cavity 13. The bottom of the spring is fixed to the bottom of the composite recovery cylinder, and the top of the spring is connected to the piston of the first-stage hydraulic cylinder, so that the piston can maintain balance in the middle position when there are no waves. The middle position refers to the middle position of the vertical height of the composite recovery cylinder.

[0051] The preferred number of springs is two, namely the left spring 12 and the right spring 15, one end of which is fixedly installed at the bottom of the composite recycling cylinder, located on the left and right sides of the C cavity 13 respectively.

[0052] Example 4:

[0053] An integrated wave energy generation device, structured as described in Embodiment 1, differs in that the upper pressure of the high-pressure accumulator chamber 16 is typically set according to sea conditions, the purpose of the low-pressure accumulator chamber 17 is to fill the cavity with liquid, the nitrogen pressure at the upper part of the moving piston of the high-pressure accumulator chamber 16 is above 8 MPa, and the nitrogen pressure at the upper part of the moving piston of the low-pressure accumulator chamber 17 is 0.3–0.5 MPa. Figure 1 As shown, 8 represents nitrogen gas filled into the high-pressure accumulator compartment, and 9 represents nitrogen gas filled into the low-pressure accumulator compartment.

[0054] When the energy recovery chamber, power generation chamber, high-voltage accumulator chamber 16, and low-voltage accumulator chamber 17 work together, they form a simple, efficient, energy-saving, and stable closed-loop wave power generation hydraulic system, eliminating the need for an oil tank and reducing the overall size of the power generation device.

[0055] Example 5:

[0056] An integrated wave energy power generation device has the structure described in Embodiment 1, except that the float module 1 is a float that floats on the water surface, and the rest of the device is integrated into the stator module. The float is in direct contact with the wave energy and captures energy by oscillating with the waves. The piston rod 7 of the first-stage hydraulic cylinder is directly connected to the float.

[0057] The float is a cylindrical float.

[0058] Example 6:

[0059] An integrated wave energy power generation device has the structure described in Example 1, except that the shells of the energy recovery chamber, power generation chamber, high-voltage energy storage chamber 16, low-voltage energy storage chamber 17, battery pack and electrical processing chamber 3 are all made of corrosion-resistant alloy material, and the outer surface of the shells is coated with anti-corrosion coating.

[0060] Each compartment is integrated into a stator module. The outer shell of the stator module is also made of alloy material and has a closed structure, which effectively prevents seawater corrosion. The outer surface of the compartment shell is coated with anti-corrosion paint.

[0061] For corrosion-resistant alloy materials, cast titanium ZT can be selected, and for anti-corrosion coating, ZS-711 inorganic anti-corrosion coating can be used.

[0062] Example 7:

[0063] An integrated wave energy power generation device operates as follows: when the wave pushes the float upward, the piston rod 7 of the first-stage hydraulic cylinder moves upward accordingly, and hydraulic oil is compressed and flows out of chamber A 6. The hydraulic oil flows through the working oil circuit in sequence through the upper interface of the check valve bridge 5, the branch where the first one-way valve 23 is located, and the sequence valve 4 drives the bidirectional quantitative motor 11 to rotate forward. Then, it enters chamber B 14 through the right interface of the check valve bridge 5 and the branch where the third one-way valve 25 is located. During the upward process, neither the left spring 12 nor the right spring 15 participates.

[0064] As the wave pushes the float downward, the piston rod 7 of the first-stage hydraulic cylinder moves downward accordingly. The hydraulic oil in chamber B 14 is compressed and flows out. The hydraulic oil flows through the working oil circuit in sequence through the lower interface of the check valve bridge 5, the branch where the second check valve 24 is located, and the sequence valve 4 drives the bidirectional quantitative motor 11 to rotate forward. Then, it enters chamber A 6 through the right interface of the check valve bridge 5 and the branch where the fourth check valve 26 is located. During the descent, the left spring 12 and the right spring 15 are both compressed, accumulating some elastic potential energy for the ascent stage.

[0065] Example 8:

[0066] An integrated wave energy power generation device is described in Example 7. The difference is that when the wave pushes the float to rise, and the wave is large, the oil output of chamber A 6 is large, and the instantaneous pressure of the working oil pipe is too high. A part of the hydraulic oil enters chamber B 14, and the remaining hydraulic oil enters the lower part of the low-pressure accumulator chamber 17 through the working oil pipe. At this time, the low-pressure accumulator chamber 17 plays the role of oil suction, buffering and energy storage. When the inlet pressure of the sequence valve of the present invention reaches a certain value, it opens to ensure that the bidirectional quantitative motor has a certain working opening pressure.

[0067] When the waves push the float up, if the waves are small, the instantaneous oil output of chamber A6 is insufficient and cannot reach the working oil pressure of the system. At this time, the lower part of the high-pressure accumulator chamber 16 outputs oil and supplies oil to the sequence valve 4 and the bidirectional quantitative motor 11 through the working oil circuit to maintain the stability of the working oil pressure, ensure that the bidirectional quantitative motor works continuously and has a relatively stable output, and that the instantaneous voltage value is not too high or too low.

[0068] Example 9:

[0069] An integrated wave energy power generation device is described in Example 7. The difference is that when the wave pushes the float down, the oil output of chamber B 14 is large when the wave is large, the instantaneous pressure of the working oil pipe is too high, a part of the hydraulic oil enters chamber A 6, and the remaining hydraulic oil enters the lower part of the low-pressure accumulator chamber 17 through the working oil pipe.

[0070] When the waves push the float down, if the waves are small, the instantaneous oil output of chamber B 14 is insufficient and cannot reach the working oil pressure of the system. At this time, the lower part of the high-pressure accumulator chamber 16 outputs oil and supplies oil to the sequence valve 4 and the bidirectional quantitative motor 11 through the working oil circuit to maintain the stability of the working oil pressure.

[0071] Throughout the entire ascent and descent process, the high-pressure accumulator compartment 16 and the low-pressure accumulator compartment 17 work together as components in the hydraulic system to store and release pressure energy. They can also serve as auxiliary components for short-term oil supply and absorption of system vibration and shock.

[0072] During the energy recovery process, the check valve bridge 5 can act as a rectifier to ensure that the bidirectional quantitative motor 11 rotates in one direction, driving the generator 10 to rotate. The electrical energy generated by the generator 10 is transmitted to the battery pack and the electrical processing compartment 3 through the generator output line 19 for further rectification, inversion and storage, and outputting stable electrical energy.

[0073] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. An integrated wave energy power plant, characterized in that The energy recovery cabin, the power generation cabin, the high-pressure accumulator cabin, the low-pressure accumulator cabin, the battery pack and the electric processing cabin are integrated and processed in one body to form the stator module; The energy recovery cabin comprises a composite recovery cylinder which is composed of two-stage hydraulic cylinders, i.e., a first-stage hydraulic cylinder and a second-stage hydraulic cylinder, the piston rod of the first-stage hydraulic cylinder is a hollow structure and is used as the cylinder barrel of the second-stage hydraulic cylinder, the piston rod of the first-stage hydraulic cylinder is directly connected with the float module, the piston rod of the second-stage hydraulic cylinder is also a hollow structure and is fixed on the cylinder barrel of the first-stage hydraulic cylinder, the upper and lower parts of the piston of the first-stage hydraulic cylinder form A cavity and C cavity respectively, and the hollow part of the piston rod of the first-stage hydraulic cylinder is communicated with the hollow part of the piston rod of the second-stage hydraulic cylinder to form B cavity; The power generation cabin comprises a check valve bridge, a sequence valve, a bidirectional quantitative motor and a generator, the movable piston is arranged in the high-pressure accumulator cabin and the low-pressure accumulator cabin, nitrogen with different pressures is filled in the upper part of the movable piston of the high-pressure accumulator cabin and the low-pressure accumulator cabin, and hydraulic oil is filled in the lower part of the movable piston of the high-pressure accumulator cabin and the low-pressure accumulator cabin; The A cavity and the B cavity are connected with the upper interface and the lower interface of the check valve bridge through working oil pipes, the left interface of the check valve bridge is connected with the lower part of the high-pressure accumulator cabin through a working oil pipe, the left interface is connected with the bidirectional quantitative motor through a sequence valve, the right interface of the check valve bridge is connected with the lower part of the low-pressure accumulator cabin through a working oil pipe, and the right interface is connected with the bidirectional quantitative motor, the bidirectional quantitative motor is connected with the generator, and the generator is connected with the battery pack and the electric processing cabin; The check valve bridge is composed of four one-way valves, i.e., a first one-way valve, a second one-way valve, a third one-way valve and a fourth one-way valve, which are arranged between the upper interface and the left interface, between the left interface and the lower interface, between the lower interface and the right interface and between the right interface and the upper interface of the check valve bridge respectively, so as to ensure that the hydraulic oil can only flow from the upper interface to the left interface, from the lower interface to the left interface, from the right interface to the lower interface and from the right interface to the upper interface; The C cavity is not communicated with oil, springs which are symmetrical to each other are arranged in the C cavity, the bottom of the spring is fixed on the cylinder bottom of the composite recovery cylinder, and the top of the spring is connected with the piston of the first-stage hydraulic cylinder, so that the piston can keep balance in the middle position in the case of no wave; The pressure of the nitrogen filled in the upper part of the movable piston of the high-pressure accumulator cabin is above 8Mpa, and the pressure of the nitrogen filled in the upper part of the movable piston of the low-pressure accumulator cabin is below 1Mpa.

2. The integrated wave energy power plant according to claim 1, characterized in that The number of the springs is two, which are arranged on the left and right sides of the C cavity.

3. The integrated wave energy power plant according to claim 2, characterized in that The float module is a float floating on the water surface, and the piston rod of the first-stage hydraulic cylinder is directly connected with the float; The float is a cylindrical float.

4. The integrated wave energy power plant according to claim 3, characterized in that The cabin shells of the energy recovery cabin, the power generation cabin, the high-pressure accumulator cabin, the low-pressure accumulator cabin and the battery pack and the electric processing cabin are made of alloy materials, and the outer surfaces of the cabin shells are coated with anticorrosive paint. The cabins are integrated to form the stator module, and the outer shell of the stator module is also made of alloy material, and the outer surface of the cabin shell is coated with anticorrosive paint.

5. A method of operating an integrated wave energy power plant according to claim 4, characterized in that, When the wave pushes the float up, the piston rod of the primary hydraulic cylinder moves up, the A cavity is compressed to flow out hydraulic oil, the hydraulic oil flows through the upper interface of the check valve bridge, the branch of the first one-way valve, the positive rotation of the sequence valve driven bidirectional quantitative motor, and then enters the B cavity through the right interface of the check valve bridge and the branch of the third one-way valve. When the wave pushes the float down, the piston rod of the primary hydraulic cylinder moves down, the B cavity is compressed to flow out hydraulic oil, the hydraulic oil flows through the lower interface of the check valve bridge, the branch of the second one-way valve, the positive rotation of the sequence valve driven bidirectional quantitative motor, and then enters the A cavity through the right interface of the check valve bridge and the branch of the fourth one-way valve.

6. The method of operating an integrated wave energy power plant according to claim 5, characterized in that, When the wave pushes the float up, the wave is large, the A cavity discharges a large amount of oil, the instantaneous pressure of the working oil pipe is too high, part of the hydraulic oil enters the B cavity, and the remaining hydraulic oil enters the lower part of the low-pressure accumulator cabin through the working oil pipe; When the wave pushes the float up, the wave is small, the instantaneous oil discharge of the A cavity is insufficient, and the working oil pressure of the system cannot be reached, at this time, the lower part of the high-pressure accumulator cabin discharges oil, supplies oil to the sequence valve and bidirectional quantitative motor through the working oil way, and maintains the stability of the working oil pressure.

7. The method of operating an integrated wave energy power plant according to claim 6, characterized in that, When the wave pushes the float down, the wave is large, the B cavity discharges a large amount of oil, the instantaneous pressure of the working oil pipe is too high, part of the hydraulic oil enters the A cavity, and the remaining hydraulic oil enters the lower part of the low-pressure accumulator cabin through the working oil pipe; When the wave pushes the float down, the wave is small, the instantaneous oil discharge of the B cavity is insufficient, and the working oil pressure of the system cannot be reached, at this time, the lower part of the high-pressure accumulator cabin discharges oil, supplies oil to the sequence valve and bidirectional quantitative motor through the working oil way, and maintains the stability of the working oil pressure.

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