CN104929856B - It is a kind of to have accumulation of energy link the autonomous Wave energy conversion system run - Google Patents

Abstract

The invention provides a wave energy conversion system with an energy storage link that can operate autonomously, including a hydraulic cylinder driven by wave energy, a sealed oil tank that presses hydraulic oil into the working chamber of the hydraulic cylinder according to a set rate range, The gas cylinder inflated in the sealed oil tank, as well as the accumulator pre-filled with high-pressure gas, the autonomous hydraulic controller, the hydraulic motor and the hydraulic energy-consuming equipment can make the oil in the sealed oil tank It is sequentially pressed into the hydraulic cylinder, accumulator, autonomous hydraulic controller, hydraulic motor, and sealed oil tank to form a work cycle. In the process, the high-frequency unstable wave energy is stored to a certain critical value and then converted into a relatively stable wave energy. Electric energy or other forms of energy realize intermittent energy supply under small wave conditions and continuous energy supply under medium wave conditions. When the wave conditions are greater than the design, the hydraulic system overflows while supplying energy, and always maintains the optimal output of the system.

Description

A wave energy conversion system with an energy storage link that can operate autonomously

technical field

The invention relates to the technical field of wave energy utilization, in particular to a wave energy conversion system with an energy storage link that can operate autonomously.

Background technique

Wave energy is the most compelling form of ocean energy. In the vast ocean that is not affected by terrain, wave energy exists widely. How to convert wave energy into electrical energy or other forms of energy has become a major topic in the field of energy research. Corresponding wave energy conversion methods are various, such as pneumatic conversion, oscillating water column conversion, rack and pinion conversion, low head generator conversion, linear generator conversion, etc.

For the floating wave power generation device, it is far away from the mainland and works in the ocean with harsh environment. The harsh environmental conditions and difficult access to maintenance equipment are the main problems faced by this type of wave power device. To make the floating wave power device work for a long time, It is very important to adopt a reasonable, reliable and efficient energy conversion system, but currently there is no reliable dedicated wave energy conversion system. If the conventional energy conversion system of hydroelectric power generation, thermal power generation, and diesel engine power generation device is used as the wave energy conversion system, the conventional energy conversion system needs relatively stable input energy to make the equipment operate effectively, and the wave energy received by the wave power generation device will be in a short time. There are large changes in the cycle. For example, within a wave energy cycle (3-8 seconds), the wave energy power changes from 0 kilowatts per meter to tens of kilowatts, and then from tens of kilowatts per meter to 0 kilowatts. Severe waves Energy power changes will make it difficult for conventional energy conversion systems to work normally, and even cause damage in multiple high-frequency oscillations. In addition, wave power generation devices work in the ocean far away from human settlements, and maintenance and maintenance are difficult to achieve in time. This requires the wave energy conversion system to be able to work stably for a long time under unattended conditions. Reliable components and stable systems are essential. conditions, and most of the current wave energy conversion systems cannot achieve long-term autonomous operation in the ocean.

Therefore, the prior art still needs to be improved and developed.

Contents of the invention

Aiming at the problems existing in the prior art, the present invention proposes a wave energy conversion system with an energy storage link that can operate autonomously to adapt to the unstable wave energy flow density. After the wave power generation device is put into the ocean, the wave energy conversion system can automatically Adaptively switch the power generation state, so that the power generation device can run independently and efficiently for a long time.

In order to solve the problems of the technologies described above, the technical solution of the present invention is as follows:

A wave energy conversion system with an energy storage link that can operate autonomously, including a hydraulic cylinder driven by wave energy, a sealed oil tank that presses hydraulic oil into the working chamber of the hydraulic cylinder according to a set rate range, and a device for inflating the sealed oil tank. Gas cylinders, accumulators pre-filled with high-pressure gas, autonomous hydraulic controllers, hydraulic motors, and hydraulic energy-consuming equipment. A pressure reducing valve for setting the pressure in the sealed oil tank. The lower end of the sealed oil tank leads to the inlet of the working chamber of the hydraulic cylinder through the first oil inlet pipe, and the outlet of the working chamber leads to the main oil delivery road through the first oil outlet pipe. The second oil inlet pipe and the third oil inlet pipe are sequentially led out from the main oil delivery road, the second oil inlet pipe leads to the lower end of the accumulator, the third oil inlet pipe is connected to the inlet of the autonomous hydraulic controller, and the outlet of the autonomous hydraulic controller The outlet is connected to one end of the second oil outlet pipe, the hydraulic motor is arranged on the second oil outlet pipe, and the output shaft of the hydraulic motor is connected to the input shaft of the hydraulic energy device, and the other end of the second oil outlet pipe leads to the main oil return road , the oil return trunk is connected back to the lower end of the sealed oil tank.

Further improvement of the present invention has:

The wave energy conversion system with an energy storage link that can operate autonomously also includes a first oil return bypass leading from the second oil inlet pipe at the lower end of the accumulator and leading to the oil return trunk. The first overflow valve and the first one-way valve are sequentially connected in series on the oil return bypass.

The wave energy conversion system with an energy storage link that can operate autonomously also includes a second oil return bypass leading from the first oil outlet pipe to the first oil inlet pipe, and a hydraulic cylinder is arranged on the second oil return bypass Outlet valve group.

A filter and a second one-way valve connected in parallel are provided at the second oil outlet pipe at the oil outlet of the hydraulic motor.

The upper end of the sealed oil tank is also provided with a second overflow valve.

A first air gauge is provided at the gas pipe at the outlet of the gas cylinder, and a second air pressure gauge is provided at the gas pipe near the sealed oil tank.

The wave energy conversion system with an energy storage link that can operate autonomously also includes connecting in series with the air pipe, the first oil inlet pipe, the second oil inlet pipe, and the third oil inlet pipe, and connecting in parallel with the first overflow valve. end ball valve.

The wave energy conversion system of the present invention has an energy storage link and can operate autonomously. Driven by the wave energy and stabilized by the gas cylinder, the oil in the sealed oil tank is sequentially pressed into the hydraulic cylinder, the accumulator, and the autonomous hydraulic controller. , hydraulic motors, and sealed oil tanks to form a work cycle. During this process, the high-frequency unstable wave energy is stored to a certain critical value and then converted into relatively stable electric energy or other forms of energy to achieve intermittent energy supply under small waves. Continuous energy supply under medium wave conditions, when the wave conditions are greater than the design, the hydraulic system overflows while supplying energy, and always maintains the optimal output of the system.

The advantages of the present invention are: 1. It can store high-frequency unstable wave energy, and then release it normally to hydraulic energy-consuming equipment, avoiding high-frequency oscillation and impact, and making conventional hydraulic motors and hydraulic energy-consuming equipment more effective in energy conversion. The system can still run stably and efficiently, which not only solves the problem of energy quality, but also prolongs the service life; 2. After energy storage, wave energy conversion can realize intermittent energy supply under small wave conditions and continuous energy supply under medium wave conditions , greater than the design wave condition, if the pressure of the accumulator increases sharply above the safe value, the first overflow valve will be automatically opened, and the oil will be returned through the first check valve to protect the safety of the accumulator and its pipeline, realizing Overflow at the same time of energy supply, keep the system always have the optimal output; 3. The second one-way valve can avoid the fault caused by the blockage of the filter at the oil outlet of the hydraulic motor; 4. The internal pressure of the sealed oil tank is greater than the set safety value, the second overflow valve will automatically open to release the pressure, which can ensure the safety of the sealed fuel tank; 5. The air pressure in the gas cylinder and the sealed fuel tank can be displayed by the first barometer and the second barometer; The ball valve installed in the road can make each component cut in or out of the system in time, realize the repair and maintenance of the system under non-stop working conditions, and also facilitate the expansion or deletion of the system, which has strong flexibility.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is a modular expansion diagram of the present invention;

Explanation of reference signs: 10, sealed oil tank; 11, gas cylinder; 12, first air pressure gauge; 13, pressure reducing valve; 14, second air pressure gauge; 17, second overflow valve; 20, hydraulic cylinder; 30, Accumulator; 33. First overflow valve; 34. First one-way valve; 40. Hydraulic motor; 42. Autonomous hydraulic controller; 43. Hydraulic energy-using equipment; 44. Filter; 45. Second one-way Valve; 51, air pipe; 53, the first oil inlet pipe; 54, the first oil outlet pipe; 55, the second oil return bypass; 56, the oil main road; 57, the second oil inlet pipe; 58, the first oil return side Road; 59, the third oil inlet pipe; 513, the main oil return road.

detailed description

In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Example

As shown in Figure 1, a wave energy conversion system with an energy storage link that can operate autonomously includes a hydraulic cylinder 20 driven by wave energy, and a sealed oil tank that presses hydraulic oil into the working chamber of the hydraulic cylinder 20 according to the set rate range 10. The gas cylinder 11 used to inflate the sealed oil tank 10, and the accumulator 30 pre-filled with high-pressure gas, the autonomous hydraulic controller 42, the hydraulic motor 40 and the hydraulic energy device 43, the outlet of the gas cylinder 11 is through the air pipe 51 is connected to the upper end of the sealed oil tank 10, and a pressure reducing valve 13 for maintaining the set pressure in the sealed oil tank 10 is arranged on the air pipe 51, and the lower end of the sealed oil tank 10 leads to the hydraulic cylinder through the first oil inlet pipe 53 The inlet of the working chamber of 20, the outlet of the working chamber leads to the oil delivery main road 56 through the first oil outlet pipe 54, and the second oil inlet pipe 57, the third oil inlet pipe 59 are sequentially drawn from the oil delivery main road 56, and the second oil inlet pipe 57 leads to the lower end of the accumulator 30, the third oil inlet pipe 59 is connected to the inlet of the autonomous hydraulic controller 42, the outlet of the autonomous hydraulic controller 42 is connected to one end of the second oil outlet pipe, and the hydraulic motor 40 is set On the second oil outlet pipe, and the output shaft of the hydraulic motor 40 is connected with the input shaft of the hydraulic energy device 43, the other end of the second oil outlet pipe leads to the oil return main circuit 513, and the oil return main circuit 513 is connected back to the seal The lower end of the fuel tank 10.

Further improvement of the present invention has:

The wave energy conversion system with an energy storage link that can operate autonomously also includes a first oil return bypass leading from the second oil inlet pipe 57 at the lower end of the accumulator 30 and leading to the oil return trunk 513 58 , the first overflow valve 33 and the first one-way valve 34 are sequentially connected in series to the first oil return bypass 58 .

The wave energy conversion system with an energy storage link that can operate autonomously also includes a second oil return bypass 55 drawn from the first oil outlet pipe 54 and leading to the first oil inlet pipe 53. The second oil return bypass 55 There is a hydraulic cylinder oil outlet valve group on the top.

A filter 44 and a second one-way valve 45 connected in parallel are provided at the second oil outlet pipe at the oil outlet of the hydraulic motor 40 .

The upper end of the sealed oil tank 10 is also provided with a second overflow valve 17 .

A first air gauge 12 is provided at the air pipe 51 at the outlet of the gas cylinder 11 , and a second air pressure gauge 14 is provided at the air pipe 51 near the sealed oil tank 10 .

The wave energy conversion system with an energy storage link that can operate autonomously also includes connecting in series with the gas pipe 51, the first oil inlet pipe 53, the second oil inlet pipe 57, and the third oil inlet pipe 59, and connecting in parallel with the first A ball valve at both ends of the overflow valve 33 .

The gas cylinder 11 in the present invention may be a nitrogen cylinder or other gas cylinders filled with inert gas, and a nitrogen cylinder is taken as an example for introduction here.

In the present invention, the upper end of the sealed oil tank 10 is connected to the nitrogen cylinder 11 through the air pipe 51, and the air pressure gauge 12, the pressure reducing valve 13, the air pressure gauge 14, the ball valve 15, and the ball valve 16 are successively installed between the nitrogen cylinder 11 and the sealed oil tank 10 through the air pipe 51 , the upper end of the sealed oil tank 10 is connected to the overflow valve 17 through the air pipe 51 . The lower end of the sealed oil tank 10 is connected to the working chamber of the hydraulic cylinder 20 through the first oil inlet pipe 53, and between the sealed oil tank 10 and the hydraulic cylinder 20, a ball valve 19, a ball valve 26, and a one-way valve 21 are installed in sequence. The working chamber of the hydraulic cylinder 20 is connected to the accumulator 30 through the first oil outlet pipe 54, the oil delivery trunk 56, and the second oil inlet pipe 57. A tapered check valve 25 is installed on the first oil outlet pipe 54, and the second oil inlet pipe Ball valve 31 is installed on 57; Simultaneously, taper check valve 24, ball valve 22 and relief valve 23 are installed between the first oil outlet pipe 54 to the first oil inlet pipe 53. The accumulator 30 is connected to the oil return trunk 513 through the first oil return bypass 58, and on the first oil return bypass 58, the ball valve 32 is connected in parallel with the overflow valve 33 and then connected to the check valve 34; meanwhile, The accumulator 30 is connected with the autonomous hydraulic controller 42 through the second oil inlet pipe 57 and the third oil inlet pipe 59. The ball valve 41 is installed on the third oil inlet pipe 59. The motor 40 is connected to the oil inlet, the output shaft of the hydraulic motor 40 is connected to the input shaft of the hydraulic energy device 43, the oil discharge port of the hydraulic motor 40 is connected to the pipeline 512 through the oil pipe 511, and at the oil outlet of the hydraulic motor 40, a check valve 45 is connected in parallel with the filter 44 and then connected to the one-way valve 46, and is connected to the lower end of the sealed oil tank 10 through the other end 512 of the second oil outlet pipe and the oil return trunk 513.

The present invention has a wave energy conversion system that can operate autonomously in the energy storage link, and its components and unit functions and working states are introduced as follows:

The sealed oil tank 10 is a hydraulic oil container, which is injected with hydraulic oil larger than 3 times the volume of the accumulator 30 and pre-filled with nitrogen to maintain a pressure of about 0.1-0.2 MPa. When the hydraulic cylinder 20 needs to enter oil, the pressure in the sealed oil tank 10 makes The oil can quickly flow into the working chamber of the hydraulic cylinder 20. The lower part of the sealed oil tank 10 is hydraulic oil, and the upper part is inert nitrogen. The nitrogen cylinder 11 is pre-filled with high-pressure nitrogen gas as the pressure source of the sealed oil tank 10. Specifically, the sealed oil tank 10 is inflated through the pressure reducing valve 13 and the ball valve 15. The pressure reducing valve 13 is adjusted to the required pressure of the sealed oil tank 10 and remains in the set state , if the sealed oil tank 10 and its accessory components have gas leakage, the gas in the nitrogen cylinder 11 can supplement the gas in the sealed oil tank for a long time by the pressure of the pressure reducing valve 13 to ensure that the working pressure in the sealed oil tank 10 is normal. The pressure gauge 12 is used to display the pressure in the nitrogen cylinder 11, the pressure gauge 14 is used to display the pressure in the sealed oil tank 10, the ball valve 15 is used to connect or cut off the gas connection between the nitrogen cylinder 11 and the sealed oil tank 10, and the ball valve 16 is usually closed state, if it is necessary to discharge the gas in the sealed oil tank 10 or inflate the sealed oil tank 10 through the ball valve 16, then open the ball valve 16 to connect it to the outside. In order to prevent the pressure in the sealed oil tank from rising suddenly and causing dangerous accidents, an overflow valve 17 can be set on the top of the sealed oil tank 10. If the internal pressure of the sealed oil tank 10 is greater than the safety setting value, the overflow valve 17 will automatically open to release the pressure and ensure the sealed oil tank. 10 pressure safe. The ball valve 19 and the ball valve 26 on the first oil inlet pipe 53 are usually in an open state, and are closed as required only during maintenance.

The hydraulic cylinder 20 is driven by the wave energy device, and the piston and piston rod on it reciprocate. When the piston rod of the hydraulic cylinder 20 is pulled out, the hydraulic oil in the sealed oil tank 10 passes through the single The one-way valve 21 enters the working chamber of the hydraulic cylinder 20 , and when the piston rod of the hydraulic cylinder 20 is compressed, the one-way valve 21 is closed, and the hydraulic oil in the working chamber enters the first oil outlet pipe 54 . If the ball valve 22 is opened, the hydraulic oil returns to the sealed oil tank 10 through the conical check valve 24 and the first oil inlet pipe 53; if the ball valve 22 is closed, the hydraulic oil enters the accumulator 30 through the conical check valve 25; the ball valve 22, The overflow valve 23 and the cone valve 24 form the oil outlet valve group of the hydraulic cylinder. Closing the ball valve 22 can realize the oil liquid output by the hydraulic cylinder 20 entering the accumulator 30 to contribute work; opening the ball valve 22 can realize the hydraulic oil output by the hydraulic cylinder. Backflow in the sealed oil tank 10, do not exert any effort and do no work. The accumulator 30 is pre-charged with high-pressure gas before working. After the hydraulic oil enters the accumulator 30, the internal gas is further compressed and the energy is stored. Ball valve 31 is in open state when accumulator 30 works, and ball valve 31 can be closed when overhauling accumulator 30; Ball valve 32 is in closed state when accumulator 30 works, and ball valve 32 can be opened during overhaul. When the pressure of the accumulator 30 increases sharply above the safe value, the overflow valve 33 is automatically opened, so that the high-pressure oil flows back to the sealed oil tank 10 through the check valve 34 and the check valve 18, ensuring the safety of the accumulator 30 and its pipelines. Safety.

When the system works normally, when the oil pressure in the accumulator 30 rises to the pressure value required for power generation or work, the autonomous hydraulic controller 42 will automatically open, and the high-pressure oil in the accumulator 30 will pass through the third oil inlet pipe 59, the second One end 510 of the oil outlet pipe enters the oil inlet of the hydraulic motor 40 to drive the hydraulic motor 40 to rotate, and then drives the hydraulic energy-using equipment 43 to work. The oil discharge port oil pipe 511 of the hydraulic motor 40 is connected to the other end 512 of the second oil outlet pipe, and the return oil of the hydraulic motor 40 flows back into the sealed oil tank 10 through the filter 44 , the one-way valve 46 and the one-way valve 18 . In order to prevent the filter 44 from clogging, a one-way valve 45 can be installed in parallel with it to prevent failures caused by the clogging of the filter 44. The one-way valve 45 has a preset starting pressure, opens when it is higher than the starting pressure, and closes when it is lower than the starting pressure. The function is similar relief valve.

Among them, the autonomous hydraulic controller 42 is the autonomous hydraulic controller of the wave energy conversion device defined in the invention patent with the authorized announcement date of December 31, 2014 and the authorized announcement number CN102619792 B.

The working principle of the wave energy conversion system with the energy storage link and autonomous operation of the present invention is: the wave energy drives the piston rod of the hydraulic cylinder 20 to reciprocate, when the piston rod of the hydraulic cylinder 20 is pulled out, the pressure inside the sealed oil tank 10 The oil flows into the working chamber of the hydraulic cylinder 20. When the piston rod of the hydraulic cylinder 20 is pressed inward, the oil in the working chamber of the hydraulic cylinder 20 enters the accumulator 30 through the conical check valve 25 when the ball valve 22 is closed. The accumulator 30 is pre-charged with high-pressure gas before working. As the hydraulic oil inside the hydraulic cylinder 20 is continuously pumped into the accumulator 30, the gas in the accumulator 30 is gradually compressed, energy is accumulated, and the oil pressure and air pressure gradually increase. High, when the hydraulic oil pressure reaches the energy storage upper limit set by the autonomous hydraulic controller 42, the autonomous hydraulic controller 42 opens the oil circuit between the accumulator 30 and the hydraulic motor 40, and the high-pressure hydraulic pressure in the accumulator 30 The oil drives the hydraulic motor 40 through the autonomous hydraulic controller 42, and the hydraulic motor 40 further drives the hydraulic energy-consuming equipment 43 to work, and the oil flows back to the sealed oil tank 10 to participate in the next working cycle again. During the release of the oil, the pressure in the accumulator 30 gradually decreases. When the pressure drops to the set lower limit for stopping energy supply, the autonomous hydraulic controller 42 is turned off, and the accumulator 30 stops supplying oil to the hydraulic motor 40. The hydraulic motor 40 stops supplying energy to the hydraulic electric equipment.

Under small wave conditions, the wave energy conversion system device of the present invention, which has an energy storage link and can operate autonomously, can automatically and intermittently generate power according to the above-mentioned rules; The pressure of the input oil will never be lower than the lower limit value set by the autonomous hydraulic controller 42 to stop energy supply, and the wave energy hydraulic conversion system maintains continuous energy supply within the set pressure range. If during the energy supply process, the incoming flow of the accumulator 30 is greater than the output hydraulic oil, the pressure in the accumulator 30 will exceed its set safety upper limit. At this time, the overflow valve 33 is opened, and the excess flow is released back The oil tank 10 is sealed, and the pressure will never exceed the safety value set by the overflow valve 33, which ensures reliable and stable operation of the system.

The wave energy conversion system with an energy storage link that can operate autonomously solves the problem of converting high-frequency unstable wave energy into relatively stable electric energy or other forms of energy, and provides a complete set of ocean energy wave energy conversion solutions It can make conventional hydraulic motors and generators operate stably and efficiently in the wave energy conversion system, which not only solves the problem of power generation quality, but also prolongs the service life of the conversion equipment; and the hydraulic system can realize intermittent power supply under small waves Continuous energy supply under medium wave conditions, when the wave condition is greater than the design, the hydraulic system overflows while supplying energy, so that the system always has the optimal output.

As shown in Fig. 2, the wave energy conversion system of the present invention which has an energy storage link and can operate autonomously can be divided into four modules according to functions, which are fuel tank module A, hydraulic cylinder module B, accumulator module C, and hydraulic motor module D. According to the expansion of the power of the wave energy conversion device, the invention can conveniently increase the required modules of the system and expand the working capacity of the system. And each module has a ball valve connected and closed with other modules, so that each module can be conveniently cut into the system to participate in the work, and the cut-out system does not participate in the work, which is conducive to the maintenance of some modules under non-stop working conditions.

The main features and benefits of the present invention are: 1. The system composed of conventional industrial components solves the problem of unconventional wave energy conversion, with low cost and high efficiency. 2. The system can be independently divided into fuel tank module A, hydraulic cylinder module B, accumulator module C, and hydraulic motor module D. The above modules can be easily increased or decreased in the system; each module is cut in and out of the system through a ball valve, The system module can be repaired and maintained under the working condition of non-stop, so that the application of the present invention has strong flexibility. 3. The system operates autonomously without electronic control, which greatly improves its safety and satisfies long-term operation under unattended conditions. 4. The present invention can not only convert unstable wave energy into stable electric energy, but also convert wave energy into other forms of energy to do work. For example, if the generator is replaced with other hydraulic equipment, this system can directly drive seawater desalination equipment, hydraulic cranes, etc.

The device of the present invention can be used not only in wave energy devices, but also in other systems that need to convert unstable kinetic energy into stable electric energy, such as wind power generation, energy generation using vehicle brakes, etc., and has good performance. Promote application prospects.

The above detailed description is a specific description of the feasible embodiment of the present invention. This embodiment is not used to limit the patent scope of the present invention. Any equivalent implementation or change that does not deviate from the present invention should be included in the patent scope of this case. middle.

Claims (3)

1. it is a kind of with accumulation of energy link can autonomous operation Wave energy conversion system, it is characterised in that：Including by powered by wave energy Hydraulic cylinder, by setting working chamber from speed range to hydraulic cylinder be pressed into hydraulic oil leakproof fuel cell, for being filled to leakproof fuel cell The gas cylinder of gas, and preliminary filling gases at high pressure accumulator, autonomous hydraulic controller, hydraulic motor and hydraulic pressure with can equipment, it is described The outlet of gas cylinder connects the upper end of leakproof fuel cell by tracheae, and is provided on the tracheae keeping setting in leakproof fuel cell The pressure-reducing valve of pressure, lead to the working chamber entrance of the hydraulic cylinder via the first oil inlet pipe for the lower end of the leakproof fuel cell, the work Oil transportation main line is led in the outlet of chamber via the first flowline, draws the second oil inlet pipe, the 3rd oil inlet pipe successively from oil transportation main line, Second oil inlet pipe leads to the lower end of the accumulator, and the 3rd oil inlet pipe is connected to the entrance of the autonomous hydraulic controller, autonomous One end of the second flowline of outlet connection of hydraulic controller, the hydraulic motor is arranged on the second flowline, and hydraulic pressure The output shaft of motor is connected with hydraulic pressure with the input shaft of energy equipment, and the other end of the second flowline leads to oil return main line, and oil return is done Road connects back to the lower end of the leakproof fuel cell；Also include drawing from the second oil inlet pipe position of the accumulator lower end and leading to institute State and be sequentially connected in series the first overflow valve and the first check valve in the first oil return bypass on oil return main line, first oil return bypass；Also wrap The second oil return bypass that the first oil inlet pipe is drawn and led to from the first flowline is included, second oil return bypass is provided with hydraulic cylinder Fuel-displaced valve group；The second flowline position at the fuel-displaced place of the hydraulic motor is unidirectional provided with the filter being connected in parallel and second Valve；The upper end of the leakproof fuel cell is additionally provided with the second overflow valve.

2. it is according to claim 1 with accumulation of energy link can autonomous operation Wave energy conversion system, it is characterised in that： Tracheae position at the cylinder outlet is provided with the first air gauge, and the second gas is provided with the tracheae position close to the leakproof fuel cell Press table.

3. it is according to claim 1 with accumulation of energy link can autonomous operation Wave energy conversion system, it is characterised in that：Also Including being serially connected in the tracheae, the first oil inlet pipe respectively, the second oil inlet pipe, on the 3rd oil inlet pipe and being connected in first in parallel and overflow Flow the ball valve at valve two ends.