Integrated wave power generation hydraulic energy conversion device and hydraulic cylinder thereof

Abstract

The invention discloses an integrated wave power generation hydraulic energy conversion device and a hydraulic cylinder thereof, and the conversion device comprises a floating mechanism which floats on the sea surface, sleeves the hydraulic cylinder, and is used for driving a hydraulic cylinder piston pull rod fixed on the floating mechanism to move up and down along with the up and down fluctuation of waves; the guide mechanism is fixedly mounted at the top end of the hydraulic cylinder and is used for realizing the vertical movement of the piston pull rod relative to the hydraulic cylinder; the anti-eccentric-wear mechanism is arranged above the guide mechanism and is used for connecting a piston pull rod of the hydraulic cylinder and a cross beam of the floating mechanism, so that the device rotates by a certain angle to counteract transverse force borne by the device, and eccentric wear caused by irregular movement of the floating mechanism is avoided; and the hydraulic cylinder is used for converting the mechanical energy of the oscillating body into pressure energy of hydraulic oil, then the pressure energy is used for driving the hydraulic motor to rotate through power transmission of the hydraulic valve bank and the pipeline, and then the generator is driven to generate electricity.

Description

Technical field:

[0001] The invention relates to an integrated wave energy generation hydraulic energy conversion device and a hydraulic cylinder thereof. Background technology:

[0002] As global energy and environmental issues become increasingly prominent, wave energy resources are receiving more and more attention and importance. It is very important to effectively utilize ocean wave energy with a wide distribution range and relatively high energy density. Therefore, wave energy power generation devices have emerged and developed rapidly.

[0003] Generally speaking, the working process of wave energy power generation devices is divided into two parts: energy capture and energy conversion. According to the different forms of energy capture, it can be divided into three types: oscillating body type, oscillating water column type, and wave gathering and overtaking type. Among them, the oscillating body wave energy power generation device has the advantages of high energy conversion efficiency and stable power output.

[0004] During the operation of the oscillating body wave energy power generation device, the waves push the floating oscillating body to move up and down, converting the wave energy into the mechanical energy of the oscillating body, completing the energy capture link; the oscillating body then transfers the energy to the generator through the transmission system, drives the generator to work, converts the mechanical energy into electrical energy, and completes the energy conversion link; among them, the transmission system can be divided into two forms: mechanical transmission and hydraulic transmission. The hydraulic transmission method has the advantages of easy decentralized layout and strong impact load resistance, and is more widely used.

[0005] The hydraulic cylinder is the core component of the hydraulic transmission energy conversion system. It can convert the mechanical energy of the oscillating body into the pressure energy of the hydraulic oil, and then use the pressure energy to drive the hydraulic motor to rotate through the power transmission of the hydraulic valve group and pipelines, and drive the generator to generate electricity. Most of the existing wave energy power generation devices adopt the form of multiple chambers to improve the energy conversion efficiency, widen the energy capture bandwidth, and enhance the stability of the hydraulic cylinder. However, in actual application, the form of multiple chambers occupies a large space, it is inconvenient to remove the residual air in the hydraulic cylinder, and it is difficult to achieve modular integration. At the same time, in order to reduce the friction resistance of relative motion, the oscillating body wave energy power generation device usually needs to set a guide mechanism parallel to the hydraulic cylinder, and there is a large gap between the guide mechanisms. The sealing ring between the cylinder barrel and the piston rod of the hydraulic cylinder is very prone to eccentric wear, which causes the sealing ring to be quickly damaged and the hydraulic cylinder to leak oil. Summary of the invention:

[0006] The embodiment of the present invention provides an integrated wave energy power generation hydraulic energy conversion device and its hydraulic cylinder, which have a reasonable structural design. Based on the mutual cooperation of multiple functional components, the gas in the hydraulic cylinder can be automatically emptied during actual work, avoiding the problem of eccentric wear caused by irregular movement of the floating device, greatly improving the service life of the sealing element, and ensuring the working efficiency of the wave energy power generation equipment. At the same time, the overall device adopts a modular and integrated structure, which greatly shortens the production cycle of the product, can save the occupancy rate of the equipment space, is easy to install and maintain, and increases the energy recovery unit to improve the power generation efficiency, which helps the development of wave energy power generation technology and solves the problems existing in the prior art.

[0007] The technical solution adopted by the present invention to solve the above technical problems is:

[0008] An integrated wave energy generation hydraulic energy conversion device and a hydraulic cylinder thereof, the conversion device comprising:

[0009] A floating mechanism, which floats on the sea surface and is sleeved on the outside of the hydraulic cylinder, and is used to rise and fall with the waves to drive the hydraulic cylinder piston rod fixed on the floating mechanism to move up and down;

[0010] A guide mechanism, which is fixedly mounted on the top of the hydraulic cylinder and is used to realize the vertical movement of the piston rod relative to the hydraulic cylinder;

[0011] An anti-eccentric wear mechanism is arranged above the guide mechanism and is used to connect the piston rod of the hydraulic cylinder and the crossbeam of the floating mechanism, so that the device rotates at a certain angle to offset the lateral force on the device, thereby preventing the floating mechanism from irregularly moving and causing eccentric wear;

[0012] The hydraulic cylinder is used to convert the mechanical energy of the oscillating body into the pressure energy of the hydraulic oil, and then transmit the power through the hydraulic valve group and pipelines, and use the pressure energy to drive the hydraulic motor to rotate, thereby driving the generator to generate electricity.

[0013] The floating mechanism includes a floating platform, a column, a beam and a flange; the columns are fixedly installed on both sides of the floating platform, and the tops of the columns are fixedly connected to the beam through H-shaped steel;

[0014] The hydraulic cylinder comprises a cavity, a piston, a piston rod and an upper end cover of a hydraulic oil cavity; the cavity is filled with hydraulic oil, and the piston is caused to reciprocate up and down along the cavity by the pulling force of the piston rod.

[0015] The anti-eccentric wear mechanism includes a guide column, a floating kit, a universal shaft, a universal joint, a high-strength carbon steel pipe and a flange; the number of the universal joints is two, which are respectively installed on both sides of the high-strength carbon steel pipe, and the hydraulic cylinder is connected to the float platform through the flange;

[0016] The flange is welded to the top of the piston pull rod, and the universal joint is fixed in the floating kit through the flanges on both sides, one end is connected to the high-strength carbon steel pipe, and the other end is installed in the flange welded on the H-shaped steel beam of the floating mechanism.

[0017] Four independent power generation hydraulic cylinders are fixed at the bottom of the cavity, and the energy collected by the power generation hydraulic cylinders is transmitted to the power generation system through a pipeline system and a valve group.

[0018] When working, the hydraulic cylinder is fixed in the sea by the anchor chain connected to the heavy anchor and remains relatively still. The wind blows across the sea surface to generate waves, which drive the floating mechanism up and down, causing the crossbeam to move up and down, driving the piston rod fixed on the crossbeam to move;

[0019] When the piston moves upward, the hydraulic oil in the upper part of the hydraulic cylinder cavity is compressed and the pressure increases accordingly, and the hydraulic motor is driven by the hydraulic system to generate electricity. At this time, negative pressure is generated in the lower part of the hydraulic cylinder cavity, and the hydraulic oil is sucked back to the lower cavity; when the piston moves downward, the hydraulic oil in the lower part of the hydraulic cylinder cavity is compressed and the pressure increases accordingly, and the hydraulic motor is driven by the hydraulic system to generate electricity. Negative pressure is generated in the upper part of the hydraulic cylinder cavity, and the hydraulic oil is sucked back to the upper cavity, and this reciprocating motion is used to generate electricity.

[0020] The hydraulic system includes a three-way pipe, a one-way valve, a support frame, an accumulator and a generator; the number of the one-way valves is four, which are fixed to the support frame together with the accumulator and installed in the three-way pipe, and the two ends of the long side of the three-way pipe are respectively provided with processing threads for assembly with the piston rod, and the entire hydraulic system is arranged in a hydraulic component integrated cover;

[0021] When the wave energy power generation equipment is working, the pressure in the hydraulic cylinder cavity increases, and the hydraulic oil flows from the cylinder to the hydraulic motor. The flow direction is maintained by a one-way valve, the pressure is protected by a relief valve, the pressure is stabilized by an accumulator, and the flow and pressure are controlled by a proportional flow valve to provide the required energy for the hydraulic motor. The used hydraulic oil is re-absorbed into the hydraulic cylinder cavity through the negative pressure in the hydraulic cylinder cavity.

[0022] The cavity is divided into an upper oil cavity and a lower oil cavity. An upper oil cavity inlet and outlet oil pipe is installed on the upper oil cavity. A hydraulic hose is connected to the upper oil cavity inlet and outlet oil pipes. The oil flows to the hydraulic motor through a one-way valve, a relief valve, an accumulator and a proportional flow valve. Due to the action of the one-way valve connected to the upper oil cavity, the oil in and out of the upper oil cavity flows through this pipe. The automatic exhaust device is installed on the top plate of the upper oil cavity and is connected to the piston rod through the upper air outlet pipe.

[0023] An oil inlet and outlet pipe is installed at the lower oil chamber. Due to the action of the one-way valve connected to the upper oil chamber, the inlet and outlet oil of the lower oil chamber flow through this pipe. An automatic exhaust device is installed at the piston of the lower oil chamber. The bottom of the automatic exhaust device passes through the piston and is connected to the lower oil chamber. The upper part of the automatic exhaust device is connected to the piston pull rod through the lower air outlet pipe.

[0024] The automatic exhaust device includes a spring rod, a top column, an air inlet and an air outlet, which are installed on the top of the upper oil chamber and the lower oil chamber, the air inlet is connected to the inside of the oil chamber, and the air outlet is respectively connected to the piston pull rods corresponding to the upper oil chamber and the lower oil chamber through pipe fittings; when the oil chamber is not full of hydraulic oil, the gas flows from the air inlet through the air port into the liquid outlet pipe, and when the hydraulic oil contacts the top column, the top column will be lifted upward by the upward force of the hydraulic oil, causing the spring rod in contact with it to lift up, blocking the air outlet, and realizing gas-liquid separation.

[0025] The present invention adopts the above-mentioned structure, and the floating mechanism floating on the sea surface and sleeved on the outside of the hydraulic cylinder rises and falls with the waves, so as to drive the hydraulic cylinder piston rod fixed on the floating mechanism to move up and down; the vertical movement of the piston rod relative to the hydraulic cylinder is realized by a guide mechanism installed on the top of the hydraulic cylinder; the piston rod of the hydraulic cylinder and the crossbeam of the floating mechanism are connected by an anti-eccentric wear mechanism, so that the device is rotated by a certain angle to offset the lateral force exerted on the device, thereby avoiding irregular movement of the floating mechanism and causing eccentric wear; by installing automatic exhaust devices at different positions, the automatic discharge of air in the hydraulic cylinder cavity can be realized, which has the advantages of safety, practicality, convenience and high efficiency. Description of the drawings:

[0026] Figure 1 It is a structural schematic diagram of the present invention.

[0027] Figure 2 It is a structural schematic diagram of the floating mechanism of the present invention.

[0028] Figure 3 It is a structural schematic diagram of the hydraulic cylinder of the present invention.

[0029] Figure 4 It is a connection schematic diagram of the anti-eccentric wear mechanism of the present invention.

[0030] Figure 5 It is a structural schematic diagram of the anti-eccentric wear mechanism of the present invention.

[0031] Figure 6 It is a structural schematic diagram of the anchor chain energy recovery of the present invention.

[0032] Figure 7 It is a schematic diagram of the integrated structure of the hydraulic system of the present invention.

[0033] Figure 8It is a schematic diagram of the cavity exhaust structure of the present invention.

[0034] Fig. 9 It is a schematic structural diagram of the automatic exhaust device of the present invention.

[0035] In the figure, 1-anti-eccentric wear mechanism, 2-guide mechanism, 3-floating mechanism, 4-hydraulic cylinder, 5-anchor chain, 6-floating platform, 7-column, 8-crossbeam, 9-chamber, 10-piston rod, 11-upper end cover of hydraulic oil chamber, 12-piston, 13-flange, 14-universal joint, 15-high-strength carbon steel pipe, 16-guide column, 17-universal shaft, 18-floating kit, 19-hydraulic component set Cover, 20-accumulator, 21-check valve, 22-support frame, 23-oil inlet and outlet pipes at the lower part of the oil chamber, 24-upper air outlet pipe, 25-upper oil chamber and lower oil chamber, 26-oil inlet and outlet pipes at the upper part of the oil chamber, 27-lower air outlet pipe, 28-automatic exhaust device, 29-pipeline system, 30-generator, 31-generator hydraulic cylinder, 32-spring rod, 33-top column, 34-air inlet, 35-air outlet. Specific implementation method:

[0036] In order to clearly illustrate the technical features of the present solution, the present invention is described in detail below through specific implementation methods and in conjunction with the accompanying drawings.

[0037] like Figure 1-9 As shown in, an integrated wave energy generation hydraulic energy conversion device and its hydraulic cylinder, the conversion device comprises:

[0038] A floating mechanism 3, which floats on the sea surface and is sleeved on the outside of the hydraulic cylinder, and is used to rise and fall with the waves to drive the piston rod 10 of the hydraulic cylinder 4 fixed on the floating mechanism to move up and down;

[0039] A guide mechanism 2, wherein the guide mechanism 2 is fixedly mounted on the top of the hydraulic cylinder 4 and is used to discharge air from the upper and lower parts of the hydraulic cylinder 4;

[0040] An anti-eccentric wear mechanism 1 is arranged above the guide mechanism and is used to connect the piston rod of the hydraulic cylinder and the crossbeam of the floating mechanism, so that the device rotates at a certain angle to offset the lateral force on the device, thereby preventing the floating mechanism from irregularly moving and causing eccentric wear;

[0041] The hydraulic cylinder 4 is used to convert the mechanical energy of the oscillating body into the pressure energy of the hydraulic oil, and then transmit the power through the hydraulic valve group and pipelines, and use the pressure energy to drive the hydraulic motor to rotate, thereby driving the generator to generate electricity.

[0042] The floating mechanism includes a floating platform 6, a column 7, a cross beam 8 and a flange 13; the column 7 is fixedly installed on both sides of the floating platform 6, and the top of the column 7 is fixedly connected to the cross beam 8 through an H-shaped steel;

[0043] The hydraulic cylinder comprises a cavity 9, a piston 12, a piston rod 10 and an upper end cover 11 of the hydraulic oil cavity; the cavity 9 is filled with hydraulic oil, and the piston 12 is reciprocated up and down along the cavity 9 by the pulling force of the piston rod 10.

[0044] The anti-eccentric wear mechanism includes a guide column 16, a floating kit 18, a universal shaft 17, a universal joint 14, a high-strength carbon steel pipe 15 and a flange 13; the number of the universal joints 14 is two, which are respectively installed on both sides of the high-strength carbon steel pipe 15, and the hydraulic cylinder 4 is connected to the floating platform through the flange 13;

[0045] The flange 13 is welded to the top of the piston rod, and the universal joint 14 is fixed in the floating kit through flanges on both sides, one end is connected to the high-strength carbon steel pipe 15, and the other end is installed in the flange 13 welded on the H-shaped steel beam of the floating mechanism.

[0046] Four independent power generation hydraulic cylinders 31 are fixed at the bottom of the cavity 9. The energy collected by the power generation hydraulic cylinders 31 is transmitted to the power generation system through the pipeline system 29 and the valve group.

[0047] When working, the hydraulic cylinder is fixed in the sea by the anchor chain 5 connected to the heavy anchor to keep relatively still. The wind blows over the sea surface to generate waves, which drive the floating mechanism 3 up and down, causing the crossbeam 8 to move up and down, and driving the piston pull rod 10 fixed on the crossbeam to move;

[0048] When the piston 12 moves upward, the hydraulic oil in the upper part of the hydraulic cylinder cavity is compressed and the pressure increases accordingly, and the hydraulic motor is driven by the hydraulic system to generate electricity. At this time, negative pressure is generated in the lower part of the hydraulic cylinder cavity, and the hydraulic oil is sucked back to the lower cavity; when the piston moves downward, the hydraulic oil in the lower part of the hydraulic cylinder cavity is compressed and the pressure increases accordingly, and the hydraulic motor is driven by the hydraulic system to generate electricity. Negative pressure is generated in the upper part of the hydraulic cylinder cavity, and the hydraulic oil is sucked back to the upper cavity, and the reciprocating motion is repeated to generate electricity.

[0049] The hydraulic system includes a three-way pipe, a one-way valve 21, a support frame 22, an accumulator 20 and a generator 30; the number of the one-way valves is four, which are fixed to the support frame together with the accumulator and installed in the three-way pipe, and the two ends of the long side of the three-way pipe are respectively provided with processing threads for assembly with the piston rod 10, and the entire hydraulic system is set in a hydraulic component integrated cover 19;

[0050] When the wave energy power generation equipment is working, the pressure in the hydraulic cylinder cavity 9 increases, and the hydraulic oil flows from the cylinder to the hydraulic motor. The flow direction is maintained by a one-way valve, the pressure is protected by a relief valve, the pressure is stabilized by an accumulator, and the flow and pressure are controlled by a proportional flow valve to provide the required energy for the hydraulic motor. The used hydraulic oil is re-absorbed into the hydraulic cylinder cavity by the negative pressure in the hydraulic cylinder cavity.

[0051] The cavity is divided into an upper oil cavity and a lower oil cavity 25. An upper oil cavity inlet and outlet oil pipe 26 is installed on the upper oil cavity. A hydraulic hose is connected to the upper oil cavity inlet and outlet oil pipes, and flows to the hydraulic motor through a one-way valve, a relief valve, an accumulator and a proportional flow valve. Due to the action of the one-way valve connected to the upper oil cavity, the inlet and outlet oil of the upper oil cavity flows through this pipe. The automatic exhaust device is installed on the top plate of the upper oil cavity and is connected to the guide mechanism 2 through the upper air outlet pipe 24.

[0052] An oil inlet and outlet pipe is installed at the lower oil chamber. Due to the action of the one-way valve connected to the upper oil chamber, the inlet and outlet oil of the lower oil chamber flow through this pipe. An automatic exhaust device is installed at the piston of the lower oil chamber. The bottom of the automatic exhaust device passes through the piston and is connected to the lower oil chamber. The upper part of the automatic exhaust device is connected to the piston pull rod through the lower outlet pipe 27.

[0053] The automatic exhaust device 28 includes a spring rod 32, a top column 33, an air inlet 34 and an air outlet 35, which are installed on the top of the upper oil chamber and the lower oil chamber 25. The air inlet 34 is connected to the inside of the oil chamber, and the air outlet 35 is respectively connected to the piston pull rods corresponding to the upper oil chamber and the lower oil chamber through pipes; when the oil chamber is not full of hydraulic oil, the gas flows from the air inlet through the gas port into the liquid outlet pipe. When the hydraulic oil contacts the top column, the top column will be lifted upward by the upward force of the hydraulic oil, causing the spring rod in contact with it to lift up, blocking the air outlet, and realizing gas-liquid separation.

[0054] The working principle of an integrated wave energy power generation hydraulic energy conversion device and its hydraulic cylinder in the embodiment of the present invention is: based on the mutual cooperation of multiple functional components, the gas in the hydraulic cylinder can be automatically emptied during the actual working process, avoiding the eccentric wear problem caused by the irregular movement of the floating device, greatly improving the service life of the sealing element, and ensuring the working efficiency of the wave energy power generation equipment. At the same time, the overall device adopts a modular and integrated structure, which greatly shortens the production cycle of the product, can save the occupancy rate of the equipment space, is easy to install and maintain, and increases the energy recovery unit to improve the power generation efficiency, thereby promoting the development of wave energy power generation technology.

[0055] The anti-eccentric wear mechanism and guide mechanism of the present application solve the eccentric wear problem generated when the wave energy power generation equipment is working, greatly improve the service life of the sealing element, ensure the working efficiency and working effect of the wave energy power generation equipment, and then realize the automatic discharge of air in the hydraulic cylinder by installing automatic exhaust devices at different positions.

[0056] In comparison, most existing hydraulic energy conversion devices adopt the form of adding multiple chambers to improve energy conversion efficiency, widen the energy capture bandwidth, and enhance the stability of the hydraulic cylinder. However, under actual working conditions, the multiple chambers occupy a large space, which is not convenient for removing residual air in the hydraulic cylinder and is difficult to achieve modular integration.

[0057] Generally speaking, when wave energy power generation equipment is working, gas will be generated in the hydraulic cylinder, which will have a great impact on the working efficiency, specifically manifested as: pressure instability, creeping phenomenon, system noise, local overheating, affecting working stability, oil deterioration, accelerated oxidation process, pressure shock, etc.; therefore, the integrated and modular hydraulic energy conversion device of the present application is needed to comprehensively solve the above problems.

[0058] The overall scheme mainly includes a floating mechanism, which floats on the sea surface and is mounted on the outside of the hydraulic cylinder, and is used to rise and fall with the waves to drive the hydraulic cylinder piston rod fixed on the floating mechanism to move up and down; a guide mechanism, which is fixedly installed on the top of the hydraulic cylinder, and is used to realize the vertical movement of the piston rod relative to the hydraulic cylinder; an anti-eccentric wear mechanism, which is arranged above the guide mechanism, and is used to connect the piston rod of the hydraulic cylinder and the crossbeam of the floating mechanism, so that the device rotates a certain angle to offset the lateral force applied to the device, and avoid irregular movement of the floating mechanism and eccentric wear; a hydraulic cylinder, which is used to convert the mechanical energy of the oscillating body into the pressure energy of the hydraulic oil, and then transmit the power through the hydraulic valve group and pipelines, and use the pressure energy to drive the hydraulic motor to rotate, thereby driving the generator to generate electricity.

[0059] Specifically, the floating mechanism includes a float platform, a column, a beam and a flange; the column is fixedly installed on both sides of the float platform, and the top of the column is fixedly connected to the beam through an H-shaped steel; the hydraulic cylinder includes a cavity, a piston, a piston rod and an upper end cover of the hydraulic oil cavity; the cavity is filled with hydraulic oil, and the piston is caused to reciprocate up and down along the cavity under the pulling force of the piston rod.

[0060] The core component of the present application is an anti-eccentric wear mechanism, which specifically includes a guide column, a floating kit, a universal joint, a high-strength carbon steel pipe and a flange; there are two universal joints, which are respectively installed on both sides of the high-strength carbon steel pipe, and the hydraulic cylinder is connected to the float platform through a flange; the flange is welded to the top of the piston pull rod, and the universal joint is fixed in the floating kit through the flanges on both sides, one end is connected to the high-strength carbon steel pipe, and the other end is installed in the flange welded on the H-shaped steel beam of the floating mechanism; the small piston connected to the anchor chain allows the piston pull rod to move, rotate and tilt within a certain range when it is in action, which can effectively solve the eccentric wear problem caused by the irregular movement of the floating device.

[0061] At the same time, four independent power-generating hydraulic cylinders are fixed at the bottom of the hydraulic cylinder cavity. The energy collected by the power-generating hydraulic cylinders is transmitted to the power generation system through the pipeline system and valve group. In this process, an energy recovery unit will be configured to improve the overall power generation efficiency.

[0062] During actual operation, the hydraulic cylinder is fixed in the sea by an anchor chain connected to a heavy anchor and remains relatively still. The wind blowing across the sea generates waves, which drive the floating mechanism up and down, causing the crossbeam to move up and down, thereby driving the piston pull rod fixed on the crossbeam to move; when the piston moves upward, the hydraulic oil in the upper part of the hydraulic cylinder cavity is compressed and the pressure increases accordingly, and the hydraulic motor is driven by the hydraulic system to generate electricity. At this time, negative pressure is generated in the lower part of the hydraulic cylinder cavity, and the hydraulic oil is sucked back to the lower cavity; when the piston moves downward, the hydraulic oil in the lower part of the hydraulic cylinder cavity is compressed and the pressure increases accordingly, and the hydraulic motor is driven by the hydraulic system to generate electricity, and negative pressure is generated in the upper part of the hydraulic cylinder cavity, and the hydraulic oil is sucked back to the upper cavity, and this reciprocating motion is used to generate electricity.

[0063] Furthermore, the hydraulic system includes a three-way pipe, a one-way valve, a support frame, an accumulator and a generator; the number of the one-way valves is four, which are fixed to the support frame together with the accumulator and installed in the three-way pipe, and machined threads are respectively provided at both ends of the long side of the three-way pipe for assembly with the piston pull rod, and the entire hydraulic system is arranged in a hydraulic component integrated cover; when the wave energy power generation equipment is working, the pressure in the hydraulic cylinder cavity increases, and the hydraulic oil flows from the cylinder to the hydraulic motor, and the flow direction is maintained by the one-way valve, the pressure protection is performed by the overflow valve, the pressure is stabilized by the accumulator, and the flow and pressure are controlled by the proportional flow valve to provide the required energy for the hydraulic motor; the used hydraulic oil is re-absorbed into the hydraulic cylinder cavity through the negative pressure in the hydraulic cylinder cavity.

[0064] For the exhaust method of the present application, the cavity is first divided into an upper oil cavity and a lower oil cavity, and an upper oil inlet and outlet pipe of the oil cavity is installed on the upper oil cavity, and a hydraulic hose is connected to the upper oil inlet and outlet pipe of the oil cavity, and flows to the hydraulic motor through a one-way valve, a relief valve, an accumulator and a proportional flow valve. Due to the action of the one-way valve connected to the upper oil cavity, the inlet and outlet oil of the upper oil cavity all flow through this pipe, and an automatic exhaust device is installed on the top plate of the upper oil cavity and is connected to the piston pull rod through the upper air outlet pipe; an lower oil inlet and outlet pipe of the oil cavity is installed in the lower oil cavity, and due to the action of the one-way valve connected to the upper oil cavity, the inlet and outlet oil of the lower oil cavity all flow through this pipe, and an automatic exhaust device is installed at the piston of the lower oil cavity, and the bottom of the automatic exhaust device passes through the piston and is connected to the lower oil cavity, and the upper part of the automatic exhaust device is connected to the piston pull rod through the lower air outlet pipe.

[0065] Furthermore, the automatic exhaust device of the present application can be set at different positions of the device to realize automatic exhaust of air in the hydraulic cylinder; the automatic exhaust device includes a spring rod, a top column, an air inlet and an air outlet, which are installed on the top of the upper oil chamber and the lower oil chamber, the air inlet is connected to the inside of the oil chamber, and the air outlet is respectively connected to the piston pull rods corresponding to the upper oil chamber and the lower oil chamber through pipe fittings; when the oil chamber is not full of hydraulic oil, the gas flows from the air inlet through the air port into the liquid outlet pipe, and when the hydraulic oil contacts the top column, the top column will be lifted upward by the upward force of the hydraulic oil, causing the spring rod in contact with it to lift up, blocking the air outlet, and realizing gas-liquid separation.

[0066] It is particularly noted that the equipment of the present application adopts a modular and integrated design, which can greatly shorten the production cycle of the product, save equipment space, facilitate installation and maintenance, and improve the competitiveness of the product.

[0067] To sum up, an integrated wave energy power generation hydraulic energy conversion device and its hydraulic cylinder in the embodiment of the present invention are based on the mutual cooperation of multiple functional components, and can automatically empty the gas in the hydraulic cylinder during actual work, avoiding the problem of eccentric wear caused by irregular movement of the floating device, greatly improving the service life of the sealing element, and ensuring the working efficiency of the wave energy power generation equipment. At the same time, the overall device adopts a modular and integrated structure, which greatly shortens the production cycle of the product, saves the occupancy rate of the equipment space, facilitates installation and maintenance, and increases the energy recovery unit to improve the power generation efficiency, thereby promoting the development of wave energy power generation technology.

[0068] The above specific implementation manner cannot be used as a limitation on the protection scope of the present invention. For those skilled in the art, any substitution, improvement or change made to the implementation manner of the present invention falls within the protection scope of the present invention.

[0069] The matters not described in detail in the present invention are all known technologies to those skilled in the art.

Claims

1. An integrated wave energy generation hydraulic energy conversion device and its hydraulic cylinder, characterized in that: The conversion device comprises: A floating mechanism, which floats on the sea surface and is sleeved on the outside of the hydraulic cylinder, and is used to rise and fall with the waves to drive the hydraulic cylinder piston rod fixed on the floating mechanism to move up and down; A guide mechanism, which is fixedly mounted on the top of the hydraulic cylinder and is used to realize the vertical movement of the piston rod relative to the hydraulic cylinder; An anti-eccentric wear mechanism is arranged above the guide mechanism and is used to connect the piston rod of the hydraulic cylinder and the crossbeam of the floating mechanism, so that the device rotates at a certain angle to offset the lateral force on the device, thereby preventing the floating mechanism from irregularly moving and causing eccentric wear; The hydraulic cylinder is used to convert the mechanical energy of the oscillating body into the pressure energy of the hydraulic oil, and then transmit the power through the hydraulic valve group and pipelines, and use the pressure energy to drive the hydraulic motor to rotate, thereby driving the generator to generate electricity.

2. The integrated wave energy generation hydraulic energy conversion device and its hydraulic cylinder according to claim 1, characterized in that: The floating mechanism includes a floating platform, a column, a beam and a flange; the columns are fixedly installed on both sides of the floating platform, and the tops of the columns are fixedly connected to the beam through H-shaped steel; The hydraulic cylinder comprises a cavity, a piston, a piston rod and an upper end cover of the hydraulic oil cavity; the cavity is filled with hydraulic oil, and the piston is caused to reciprocate up and down along the cavity under the pulling force of the piston rod.

3. The integrated wave energy generation hydraulic energy conversion device and its hydraulic cylinder according to claim 2, characterized in that: The anti-eccentric wear mechanism includes a guide column, a floating kit, a universal shaft, a universal joint, a high-strength carbon steel pipe and a flange; the number of the universal joints is two, which are respectively installed on both sides of the high-strength carbon steel pipe, and the hydraulic cylinder is connected to the float platform through the flange; The flange is welded to the top of the piston pull rod, and the universal joint is fixed in the floating kit through the flanges on both sides, one end is connected to the high-strength carbon steel pipe, and the other end is installed in the flange welded on the H-shaped steel beam of the floating mechanism.

4. The integrated wave energy generation hydraulic energy conversion device and its hydraulic cylinder according to claim 2, characterized in that: Four independent power generation hydraulic cylinders are fixed at the bottom of the cavity, and the energy collected by the power generation hydraulic cylinders is transmitted to the power generation system through a pipeline system and a valve group.

5. The integrated wave energy generation hydraulic energy conversion device and its hydraulic cylinder according to claim 2, characterized in that: When working, the hydraulic cylinder is fixed in the sea by the anchor chain connected to the heavy anchor and remains relatively still. The wind blows across the sea surface to generate waves, which drive the floating mechanism up and down, causing the crossbeam to move up and down, driving the piston rod fixed on the crossbeam to move; When the piston moves upward, the hydraulic oil in the upper part of the hydraulic cylinder cavity is compressed and the pressure increases accordingly, and the hydraulic motor is driven by the hydraulic system to generate electricity. At this time, negative pressure is generated in the lower part of the hydraulic cylinder cavity, and the hydraulic oil is sucked back to the lower cavity; when the piston moves downward, the hydraulic oil in the lower part of the hydraulic cylinder cavity is compressed and the pressure increases accordingly, and the hydraulic motor is driven by the hydraulic system to generate electricity. Negative pressure is generated in the upper part of the hydraulic cylinder cavity, and the hydraulic oil is sucked back to the upper cavity, and this reciprocating motion is used to generate electricity.

6. The integrated wave energy generation hydraulic energy conversion device and its hydraulic cylinder according to claim 5, characterized in that: The hydraulic system includes a three-way pipe, a one-way valve, a support frame, an accumulator and a generator; the number of the one-way valves is four, which are fixed to the support frame together with the accumulator and installed in the three-way pipe, and the two ends of the long side of the three-way pipe are respectively provided with processing threads for assembly with the piston rod, and the entire hydraulic system is arranged in a hydraulic component integrated cover; When the wave energy power generation equipment is working, the pressure in the hydraulic cylinder cavity increases, and the hydraulic oil flows from the cylinder to the hydraulic motor. The flow direction is maintained by a one-way valve, the pressure is protected by a relief valve, the pressure is stabilized by an accumulator, and the flow and pressure are controlled by a proportional flow valve to provide the required energy for the hydraulic motor. The used hydraulic oil is re-absorbed into the hydraulic cylinder cavity through the negative pressure in the hydraulic cylinder cavity.

7. The integrated wave energy generation hydraulic energy conversion device and its hydraulic cylinder according to claim 6, characterized in that: The cavity is divided into an upper oil cavity and a lower oil cavity. An upper oil cavity inlet and outlet oil pipe is installed on the upper oil cavity. A hydraulic hose is connected to the upper oil cavity inlet and outlet oil pipes. The oil flows to the hydraulic motor through a one-way valve, a relief valve, an accumulator and a proportional flow valve. Due to the action of the one-way valve connected to the upper oil cavity, the oil in and out of the upper oil cavity flows through this pipe. The automatic exhaust device is installed on the top plate of the upper oil cavity and is connected to the piston rod through the upper air outlet pipe. An oil inlet and outlet pipe is installed at the lower oil chamber. Due to the action of the one-way valve connected to the upper oil chamber, the inlet and outlet oil of the lower oil chamber flow through this pipe. An automatic exhaust device is installed at the piston of the lower oil chamber. The bottom of the automatic exhaust device passes through the piston and is connected to the lower oil chamber. The upper part of the automatic exhaust device is connected to the piston pull rod through the lower air outlet pipe.

8. The integrated wave energy generation hydraulic energy conversion device and its hydraulic cylinder according to claim 6, characterized in that: The automatic exhaust device includes a spring rod, a top column, an air inlet and an air outlet, which are installed on the top of the upper oil chamber and the lower oil chamber, the air inlet is connected to the inside of the oil chamber, and the air outlet is respectively connected to the guide mechanisms corresponding to the upper oil chamber and the lower oil chamber through pipes; when the oil chamber is not full of hydraulic oil, the gas flows from the air inlet through the air port into the liquid outlet pipe, and when the hydraulic oil contacts the top column, the top column will be lifted upward by the upward force of the hydraulic oil, causing the spring rod in contact with it to lift up, blocking the air outlet, and realizing gas-liquid separation.

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