Ionic liquid seal compression cylinder assembly

Abstract

The invention relates to the technical field of ionic liquid cylinders, in particular to an ionic liquid seal compression cylinder assembly. An annular groove is formed in the edge of the top end of the piston, ionic liquid is arranged in the annular groove, and the ionic liquid inlet is connected with an ionic liquid circulating system; an isolation cavity is arranged between the piston and the cylinder body and is connected with an ionic liquid leakage detection system; an air valve liquid impact prevention structure is arranged in the front end cover; a top end buffering structure is arranged between the piston and the front end cover, and a bottom end buffering structure is arranged between the piston and the rear end cover. The use amount of the ionic liquid is greatly reduced, the cost of the whole compression cylinder is reduced, part of the ionic liquid exhausted along with gas can be recycled, consumption and waste of the ionic liquid are avoided, the pressure sensor is used for detecting a pressure signal in the isolation cavity and sending the pressure signal to the controller, a worker can stop and overhaul in time, equipment safety is ensured, and the working efficiency is improved. The air valve liquid impact prevention structure can reduce impact of ionic liquid on the air inlet valve and the exhaust valve, and the service life of the air inlet valve and the exhaust valve is guaranteed.

Description

Technical field:

[0001] The invention relates to the technical field of ionic liquid cylinders, and in particular to an ionic liquid sealed compression cylinder assembly. Background technology:

[0002] At present, ion liquid sealed compression cylinder is a new type of equipment for pressurizing gas in hydrogenation stations. Its structure is as shown in the patent application with publication number CN116044712A, which discloses an ion liquid compressor. By injecting ion liquid into the compression chamber of the cylinder, the piston is cooled and lubricated and the sealing effect between the piston and the cylinder is improved. By entering and exiting the hydraulic chamber at the bottom of the cylinder, the piston is hydraulically driven to move up and down. The existing ion liquid cylinder of this type has the following disadvantages in actual operation:

[0003] (1) The ionic liquid in the compression chamber completely covers the top of the piston. The amount of ionic liquid used is large. Since the cost of ionic liquid is very high, it undoubtedly increases the cost of the entire compression cylinder. In addition, part of the ionic liquid will be discharged with the gas. If it cannot be recycled in time, it will cause excessive consumption and waste of the ionic liquid, greatly increasing the cost of using the ionic liquid cylinder.

[0004] (2) Since the gas pressure in the compression chamber is very high, the ionic liquid in the compression chamber will inevitably leak out from between the piston and the cylinder during long-term operation. The lack of ionic liquid will lead to a series of problems such as dry grinding between the piston and the cylinder, increased gas temperature, and reduced gas pressure. It is necessary to detect and replenish new ionic liquid in time. There is currently no good solution.

[0005] (3) When the piston moves upward, due to the high gas pressure in the compression chamber, part of the ionic liquid in the compression chamber will impact the intake valve and exhaust valve along with the gas. The impact force of the liquid on the valve is much greater than that of the gas. When working for a long time, the intake valve and exhaust valve will be damaged, affecting the service life of the intake valve and exhaust valve.

[0006] (4) When the piston moves upward, the top of the piston is likely to collide with the front cover, and when the piston moves downward, the bottom of the piston is likely to collide with the rear cover. Currently, there is no buffer structure between the top of the piston and the front cover, and between the bottom of the piston and the rear cover. The collision force is large, and the piston and the end cover will be deformed and damaged after long-term operation, affecting the service life.

[0007] In summary, the above-mentioned problems in ionic liquid cylinders have become technical problems that need to be solved urgently in the industry. Summary of the invention:

[0008] In order to make up for the deficiencies of the prior art, the present invention provides an ion liquid sealed compression cylinder assembly, which solves the problem of large ion liquid usage and high cost in the previous ion liquid cylinder, solves the problem that ion liquid leakage cannot be detected and replenished in time, solves the problem that ion liquid will impact the intake valve and exhaust valve with the gas and affect the service life, and solves the problem of large collision force on the front cover and the rear cover when the piston moves up and down.

[0009] The technical solution adopted by the present invention to solve the above technical problems is:

[0010] An ion liquid-sealed compression cylinder assembly comprises a cylinder body, a front cover and a rear cover are arranged at both ends of the cylinder body, an intake valve and an exhaust valve are arranged on the front cover, an intake and exhaust passage is arranged between the intake valve and the exhaust valve, a piston is arranged in the cylinder body, a gas compression chamber is arranged between the piston and the front cover, a hydraulic chamber is arranged between the piston and the rear cover, and a hydraulic oil inlet and outlet are arranged on the rear cover;

[0011] The top edge of the piston is provided with an annular groove, in which an ionic liquid is provided, and the ionic liquid is used to cool, lubricate and seal the piston and the cylinder body. The side wall of the cylinder body on one side of the gas compression chamber is provided with an ionic liquid inlet, and the ionic liquid inlet is connected to the ionic liquid circulation system;

[0012] An isolation chamber is provided between the piston and the cylinder body, and the isolation chamber is connected to the ionic liquid leakage detection system;

[0013] The front end cover is provided with an air valve liquid impact prevention structure;

[0014] A top end buffer structure is provided between the piston and the front end cover, and a bottom end buffer structure is provided between the piston and the rear end cover.

[0015] The ion liquid circulation system comprises a gas-liquid output pipeline connected to an exhaust valve, the gas-liquid output pipeline is connected to a gas-liquid separator, a gas outlet is provided at the top of the gas-liquid separator, the bottom of the gas-liquid separator is connected to one end of the ion liquid circulation pipeline, a switch valve is provided on the ion liquid circulation pipeline, the other end of the ion liquid circulation pipeline is connected to an ion liquid inlet, and one side of the ion liquid circulation pipeline is connected to an ion liquid filling port.

[0016] A water cooling chamber is arranged on the outer side of the cylinder body, a water inlet is arranged at the bottom of the water cooling chamber, and a water outlet is arranged at the top of the water cooling chamber.

[0017] The ionic liquid leakage detection system includes a pressure sensor arranged on a cylinder body on the side of the isolation chamber, the pressure sensor is used to detect the pressure signal in the isolation chamber and send it to a controller, a plurality of sealing rings are respectively arranged between the pistons and the cylinder body on the upper and lower sides of the isolation chamber for sealing, an ionic liquid discharge channel is arranged in the piston at the bottom of the isolation chamber, a one-way valve is installed in the ionic liquid discharge channel, and the ionic liquid discharge channel connects the isolation chamber with the hydraulic chamber.

[0018] The ionic liquid leakage detection system includes a pressure sensor arranged on a cylinder body on the side of the isolation chamber, the pressure sensor is used to detect the pressure signal in the isolation chamber and send it to a controller, a plurality of sealing rings are respectively arranged between the piston and the cylinder body on the upper and lower sides of the isolation chamber for sealing, and the bottom of the isolation chamber is connected to a buffer container arranged on the outside of the cylinder body through an ionic liquid pipeline, and the buffer container is made of a transparent material.

[0019] The air valve liquid impact prevention structure includes a buffer channel arranged in the front end cover, and a plurality of inclined channels are arranged along the circumference between the inner end surface of the front end cover and the buffer channel. The inclined channels connect the gas compression chamber with the inside of the buffer channel. The air inlet and exhaust channels are arranged horizontally, and the buffer channel is arranged vertically.

[0020] The top buffer structure comprises a buffer channel arranged in the front end cover, an upper boss is arranged at a position on the top of the piston corresponding to the buffer channel, and a clearance fit is provided between the upper boss and the buffer channel.

[0021] The bottom end buffer structure includes a lower boss arranged at a position on the bottom of the piston corresponding to the hydraulic oil inlet and outlet, the lower boss is clearance-matched with the hydraulic oil inlet and outlet, a plug is installed at the bottom of the lower boss, the plug is threadedly connected to the lower boss, a fine hole is arranged in the plug, and a plurality of side holes connected to the fine hole are arranged on the side of the lower boss.

[0022] A plurality of sealing rings and guide rings are arranged between the piston and the cylinder body.

[0023] The front end cover is connected to the cylinder body through threads, and a sealing ring is arranged between the front end cover and the cylinder body for sealing.

[0024] The present invention adopts the above scheme and has the following advantages:

[0025] By opening an annular groove on the top edge of the piston and injecting ionic liquid into the annular groove, the previous method of completely covering the top of the piston with ionic liquid is changed, while ensuring that the ionic liquid cools, lubricates and seals the piston and the cylinder body, which greatly reduces the amount of ionic liquid used and reduces the cost of the entire compression cylinder. At the same time, an ionic liquid circulation system is set up to separate the ionic liquid and gas through a gas-liquid separator, and part of the ionic liquid discharged with the gas can be recycled and reused, avoiding the consumption and waste of ionic liquid and reducing the cost of use.

[0026] An isolation chamber is provided between the piston and the cylinder body, an ion liquid discharge channel is provided in the piston at the bottom of the isolation chamber, and a one-way valve is installed in the ion liquid discharge channel. When the ion liquid in the gas compression chamber leaks, it will leak into the isolation chamber, causing the pressure in the isolation chamber to increase. When the piston moves downward, the pressure in the hydraulic chamber decreases, and the ion liquid in the isolation chamber will enter the hydraulic chamber through the ion liquid discharge channel and the one-way valve, and be discharged into the oil tank along with the hydraulic oil. A pressure sensor is provided on the cylinder body on the side of the isolation chamber. The pressure sensor is used to detect the pressure signal in the isolation chamber and send it to the controller. When the pressure sensor detects that the pressure in the isolation chamber is abnormal, it feeds back the signal to the controller, so that the staff can stop the machine for maintenance in time to ensure the safety of the equipment.

[0027] An isolation chamber is provided between the piston and the cylinder body, and the bottom of the isolation chamber is connected to a buffer container provided on the outside of the cylinder body through an ion liquid pipeline. When the ion liquid in the gas compression chamber leaks, it will leak into the isolation chamber, causing the pressure in the isolation chamber to increase. The ion liquid in the isolation chamber will enter the buffer container through the ion liquid pipeline for temporary storage. When the piston moves upward, the pressure in the isolation chamber decreases, and the ion liquid in the buffer container will return to the isolation chamber through the ion liquid pipeline to supplement the pressure. The ion liquid in the isolation chamber can lubricate and cool the piston and the cylinder body. A pressure sensor is provided on the cylinder body on the side of the isolation chamber. The pressure sensor is used to detect the pressure signal in the isolation chamber and send it to the controller. When the pressure sensor detects that the pressure in the isolation chamber is abnormal, it feeds back the signal to the controller, so that the staff can stop the machine for maintenance in time to ensure the safety of the equipment.

[0028] A buffer channel is provided in the front end cover, and a plurality of inclined channels are provided along the circumference between the inner end surface of the front end cover and the buffer channel. The inclined channel connects the gas compression chamber with the inside of the buffer channel. The processing is simple and maintenance-free. The gas in the gas compression chamber is compressed to form high-pressure gas. Part of the high-pressure gas enters the buffer channel through the inclined channel. When the gas is gathered in the buffer channel, great resistance is generated, the ion liquid is blocked, and the impact force is weakened, thereby reducing the impact of the ion liquid on the intake valve and the exhaust valve, thereby ensuring the service life of the intake valve and the exhaust valve.

[0029] By providing a buffer channel in the front cover, an upper boss is provided at the position of the buffer channel on the top of the piston, and the gap between the upper boss and the buffer channel is matched. When the piston moves up to the top, after the upper boss enters the buffer channel, due to the small gap between the upper boss and the buffer channel, the discharge speed of the gas remaining in the gas compression chamber is slowed down, and these gases will play a certain buffering role between the top of the piston and the front cover, reduce the collision force between the top of the piston and the front cover, and protect the top of the piston and the front cover; when the piston moves down to the bottom, after the lower boss enters the hydraulic oil inlet and outlet, due to the small gap between the lower boss and the hydraulic oil inlet and outlet, a plug is installed at the bottom of the lower boss, and a fine hole is provided in the plug. A part of the hydraulic oil in the hydraulic chamber is discharged from the gap between the lower boss and the hydraulic oil inlet and outlet, and the other part enters the fine hole from the side hole of the lower boss and is discharged. In this way, the discharge speed of the hydraulic oil is slowed down, and these hydraulic oils will play a certain buffering role between the bottom of the piston and the rear cover, reduce the collision force between the bottom of the piston and the rear cover, and protect the bottom of the piston and the rear cover, avoiding deformation and damage of the piston and the front and rear covers due to collision, and ensuring their service life. Description of the drawings:

[0030] Figure 1 It is a schematic diagram of the structure of the present invention.

[0031] Figure 2 This is a schematic diagram of the structure of Example 1 of the ionic liquid leakage detection system of the present invention.

[0032] Figure 3 This is a schematic diagram of the structure of Example 2 of the ionic liquid leakage detection system of the present invention.

[0033] In the figure, 1, cylinder body, 2, front end cover, 3, rear end cover, 4, intake valve, 5, exhaust valve, 6, intake and exhaust channels, 7, piston, 8, gas compression chamber, 9, hydraulic chamber, 10, hydraulic oil inlet and outlet, 11, annular groove, 12, ionic liquid, 13, ionic liquid inlet, 14, isolation chamber, 15, gas-liquid output pipeline, 16, gas-liquid separator, 17, gas outlet, 18, ionic liquid circulation pipeline, 19, switch valve, 20, ionic liquid filling port, 21, water cooling chamber, 22, water inlet, 23, water outlet, 24, pressure sensor, 25, sealing ring, 26, ionic liquid discharge channel, 27, one-way valve, 28, ionic liquid pipeline, 29, buffer container, 30, buffer channel, 31, inclined channel, 32, upper boss, 33, lower boss, 34, plug, 35, fine hole, 36, side hole, 37, guide ring. Specific implementation method:

[0034] 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.

[0035] like Figure 1-3 As shown, an ion liquid-sealed compression cylinder assembly comprises a cylinder body 1, a front end cover 2 and a rear end cover 3 are provided at both ends of the cylinder body 1, an intake valve 4 and an exhaust valve 5 are provided on the front end cover 2, an intake and exhaust passage 6 is provided between the intake valve 4 and the exhaust valve 5, a piston 7 is provided in the cylinder body 1, a gas compression chamber 8 is provided between the piston 7 and the front end cover 2, a hydraulic chamber 9 is provided between the piston 7 and the rear end cover 3, and a hydraulic oil inlet and outlet 10 is provided on the rear end cover 3; when working, the hydraulic oil enters and exits the hydraulic chamber 9 through the hydraulic oil inlet and outlet 10, so as to realize the hydraulic drive of the piston 7, so that the piston 7 moves up and down, when the piston 7 moves downward, the gas enters the gas compression chamber 8 through the intake valve 4 and the intake and exhaust passage 6, when the piston 6 moves upward, the gas in the gas compression chamber 8 is compressed and pressurized, and then discharged outwardly through the intake and exhaust passage 6 and the exhaust valve 5, thereby realizing the pressurization of the gas.

[0036] An annular groove 11 is provided at the top edge of the piston 7, and an ionic liquid 12 is provided in the annular groove 11, which greatly reduces the amount of ionic liquid used and reduces the cost of the entire compression cylinder. The ionic liquid 12 is used to cool, lubricate and seal the piston 7 and the cylinder body 1. An ionic liquid inlet 13 is provided on the side wall of the cylinder body 1 on one side of the gas compression chamber 8, and the ionic liquid inlet 13 is connected to the ionic liquid circulation system; during the pressurization process of the gas in the gas compression chamber 8, in addition to the multiple sealing rings 25 for sealing between the piston 7 and the cylinder body 1, the ionic liquid 12 in the annular groove 11 can also realize a liquid sealing function, which can effectively prevent the gas from leaking to the hydraulic chamber 9 through the piston 7 and the cylinder body 1, thereby improving the compression efficiency of the cylinder.

[0037] The ionic liquid circulation system includes a gas-liquid output pipeline 15 connected to the exhaust valve 5, the gas-liquid output pipeline 15 is connected to a gas-liquid separator 16, a gas outlet 17 is provided at the top of the gas-liquid separator 16, the bottom of the gas-liquid separator 16 is connected to one end of an ionic liquid circulation pipeline 18, a switch valve 19 is provided on the ionic liquid circulation pipeline 18, the other end of the ionic liquid circulation pipeline 18 is connected to the ionic liquid inlet 13, and one side of the ionic liquid circulation pipeline 18 is connected to an ionic liquid filling port 20. When the cylinder is working, the piston 7 pressurizes the gas, and the pressurized gas will carry part of the ionic liquid and be discharged from the exhaust valve 5, and enter the gas-liquid separator 16 through the gas-liquid output pipeline 15, and the ionic liquid and gas will be separated in the gas-liquid separator 16, and the separated gas will be discharged from the gas outlet 17, and the separated ionic liquid will return to the ionic liquid inlet 13 through the ionic liquid circulation pipeline 18 and be injected into the annular groove 11. Since the pressure in the gas-liquid separator 16 is greater than the pressure at the ionic liquid inlet 13, the entire ionic liquid circulation system does not require additional power, and the pressure difference can be used to realize the circulation of the ionic liquid. The staff can also regularly inject new ionic liquid through the ionic liquid filling port 20 to replenish the ionic liquid in the annular groove 11.

[0038] A water cooling chamber 21 is disposed outside the cylinder body 1 , a water inlet 22 is disposed at the bottom of the water cooling chamber 21 , and a water outlet 23 is disposed at the top of the water cooling chamber 21 , so that circulating water cooling can be achieved on the outside of the cylinder body 1 .

[0039] An isolation chamber 14 is provided between the piston 7 and the cylinder body 1, and the isolation chamber 14 is connected to an ionic liquid leakage detection system. The ionic liquid leakage detection system includes two forms;

[0040] One of the ionic liquid leakage detection systems includes a pressure sensor 24 arranged on the cylinder body 1 on the side of the isolation chamber 14, the pressure sensor 24 is used to detect the pressure signal in the isolation chamber 14 and send it to the controller, and a plurality of sealing rings 25 are respectively arranged between the piston 7 and the cylinder body 1 on the upper and lower sides of the isolation chamber 14 for sealing. An ionic liquid discharge channel 26 is arranged in the piston 7 at the bottom of the isolation chamber 14, and a one-way valve 27 is installed in the ionic liquid discharge channel 26. The ionic liquid discharge channel 26 connects the isolation chamber 14 with the hydraulic chamber 9. During the pressurization process of the gas in the gas compression chamber 8, on the one hand, when the ionic liquid in the gas compression chamber 8 leaks, it will leak into the isolation chamber 14, causing the pressure in the isolation chamber 14 to increase. When the piston 6 moves downward, the pressure in the hydraulic chamber 9 decreases, and the ionic liquid in the isolation chamber 14 will enter the hydraulic chamber 9 through the ionic liquid discharge channel 26 and the one-way valve 27, and be discharged into the oil tank along with the hydraulic oil. On the other hand, when the pressure sensor 24 detects that the pressure in the isolation chamber 14 is abnormal, a feedback signal is given to the controller, and the controller sends an alarm signal to remind the staff to shut down the machine for maintenance in time. The ionic liquid can be replenished in time into the gas compression chamber 8 through the ionic liquid filling port 20 to ensure the safety of the equipment.

[0041] Another ionic liquid leakage detection system includes a pressure sensor 24 arranged on the cylinder body 1 on the side of the isolation chamber 14, the pressure sensor 24 is used to detect the pressure signal in the isolation chamber 14 and send it to the controller, and a plurality of sealing rings 25 are respectively arranged between the piston 7 and the cylinder body 1 on the upper and lower sides of the isolation chamber 14 for sealing. The bottom of the isolation chamber 14 is connected to a buffer container 29 arranged on the outside of the cylinder body 1 through an ionic liquid pipeline 28. The buffer container 29 is made of transparent material, and the liquid level of the ionic liquid in the buffer container can be observed from the outside. During the pressurization process of the gas in the gas compression chamber 8, on the one hand, when the ionic liquid in the gas compression chamber 8 leaks, it will leak into the isolation chamber 14, causing the pressure in the isolation chamber 14 to increase, and the ionic liquid in the isolation chamber 14 will enter the buffer container 29 through the ionic liquid pipeline 28 for temporary storage. When the piston 7 moves upward, the pressure in the isolation chamber 14 decreases, and the ionic liquid in the buffer container 29 will return to the isolation chamber 14 through the ionic liquid pipeline 28 to supplement the pressure, and the ionic liquid in the isolation chamber 14 can lubricate and cool the piston 7 and the cylinder body 1; on the other hand, when the pressure sensor 24 detects that the pressure in the isolation chamber 14 is abnormal, a feedback signal is given to the controller, and the controller sends an alarm signal to remind the staff to shut down the machine for maintenance in time to ensure the safety of the equipment.

[0042] The front end cover 2 is provided with a gas valve liquid impact prevention structure; the gas valve liquid impact prevention structure includes a buffer channel 30 provided in the front end cover 2, and a plurality of inclined channels 31 are provided along the circumference between the inner end surface of the front end cover 2 and the buffer channel 30, and the inclined channels 31 connect the gas compression chamber 8 with the inside of the buffer channel 30. The inlet and outlet channels 6 are arranged horizontally, and the buffer channel 30 is arranged vertically, and the inlet and outlet channels 6 are perpendicular to the buffer channel 30. In this design, when the gas or liquid in the buffer channel 30 enters the inlet and outlet channels 6, it will be blocked and then diverted to both sides to reduce the impact force of the gas or liquid. After the high-pressure gas in the gas compression chamber 8 enters the buffer channel 30 through the inclined channel 31, a large resistance is generated when the gas gathers in the buffer channel 30, the ionic liquid is blocked, and the impact force is weakened. When the gas or liquid in the buffer channel 30 enters the intake and exhaust channels 6, it will be blocked again and diverted to both sides, which will slow down the impact force of the gas or liquid again, thereby reducing the impact of the ionic liquid on the intake valve 4 and the exhaust valve 5, thereby ensuring the service life of the intake valve 4 and the exhaust valve 5.

[0043] A top buffer structure is provided between the piston 7 and the front end cover 2, and the top buffer structure includes a buffer channel 30 provided in the front end cover 2, and an upper boss 32 is provided at the position of the top of the piston 7 corresponding to the buffer channel 30, and the upper boss 32 and the buffer channel 30 are in clearance. When the piston 6 moves upward to the top, after the upper boss 32 enters the buffer channel 30, the gas remaining in the gas compression chamber 8 is discharged at a slow speed due to the small gap between the upper boss 32 and the buffer channel 30, and the gas will play a certain buffering role between the top of the piston 7 and the front end cover 2, reducing the collision force between the top of the piston 7 and the front end cover 2, and protecting the top of the piston 7 and the front end cover 2.

[0044] A bottom buffer structure is provided between the piston 7 and the rear end cover 3, and the bottom buffer structure includes a lower boss 33 provided at a position of the bottom of the piston 7 corresponding to the hydraulic oil inlet and outlet 10, and a clearance fit is formed between the lower boss 33 and the hydraulic oil inlet and outlet 10, and a plug 34 is installed at the bottom of the lower boss 33, and the plug 34 is threadedly connected to the lower boss 33, and a fine hole 35 is provided in the plug 34, and a plurality of side holes 36 connected to the fine hole 35 are provided on the side of the lower boss 33. When the piston 6 moves downward to the bottom, after the lower boss 33 enters the hydraulic oil inlet and outlet 10, due to the small gap between the lower boss 33 and the hydraulic oil inlet and outlet 10, a plug 34 is installed at the bottom of the lower boss 33, and a fine hole 35 is provided in the plug 34. A part of the hydraulic oil in the hydraulic chamber 9 is discharged from the gap between the lower boss 33 and the hydraulic oil inlet and outlet 10, and the other part enters the fine hole 35 from the side hole 36 of the lower boss 33 and is discharged. In this way, the discharge speed of the hydraulic oil is slowed down, and these hydraulic oils will play a certain buffering role between the bottom of the piston 7 and the rear end cover 3, reduce the collision force between the bottom of the piston 7 and the rear end cover 3, and protect the bottom of the piston 7 and the rear end cover 3, avoiding the deformation and damage of the piston 7 and the rear end cover 3 due to collision, and ensuring their service life. When the piston 7 moves downward to the bottom, the bottom of the lower boss 33 can be just located in the hydraulic oil inlet and outlet 10, which can reduce the overall piston length and reduce the height of the whole machine. The bottom of the lower boss 33 can also be extended to the outside of the hydraulic oil inlet and outlet 10, which can reduce the volume of the hydraulic chamber and increase the pressure of the hydraulic chamber.

[0045] A plurality of sealing rings 25 and guide rings 37 are provided between the piston 7 and the cylinder body 1 to play a sealing and guiding role.

[0046] The front end cover 2 is connected to the cylinder body 1 through threads, and a sealing ring is provided between the front end cover 2 and the cylinder body 1 for sealing.

[0047] 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.

[0048] The matters not described in detail in the present invention are all known technologies to those skilled in the art.

Claims

1. An ion liquid sealed compression cylinder assembly, characterized in that: It comprises a cylinder body, a front end cover and a rear end cover are provided at both ends of the cylinder body, an intake valve and an exhaust valve are provided on the front end cover, an intake and exhaust passage is provided between the intake valve and the exhaust valve, a piston is provided in the cylinder body, a gas compression chamber is provided between the piston and the front end cover, a hydraulic chamber is provided between the piston and the rear end cover, and a hydraulic oil inlet and outlet are provided on the rear end cover; The top edge of the piston is provided with an annular groove, in which an ionic liquid is provided, and the ionic liquid is used to cool, lubricate and seal the piston and the cylinder body. The side wall of the cylinder body on one side of the gas compression chamber is provided with an ionic liquid inlet, and the ionic liquid inlet is connected to the ionic liquid circulation system; An isolation chamber is provided between the piston and the cylinder body, and the isolation chamber is connected to the ionic liquid leakage detection system; The front end cover is provided with an air valve liquid impact prevention structure; A top end buffer structure is provided between the piston and the front end cover, and a bottom end buffer structure is provided between the piston and the rear end cover.

2. The ionic liquid-sealed compression cylinder assembly according to claim 1, characterized in that: The ion liquid circulation system comprises a gas-liquid output pipeline connected to an exhaust valve, the gas-liquid output pipeline is connected to a gas-liquid separator, a gas outlet is provided at the top of the gas-liquid separator, the bottom of the gas-liquid separator is connected to one end of the ion liquid circulation pipeline, a switch valve is provided on the ion liquid circulation pipeline, the other end of the ion liquid circulation pipeline is connected to an ion liquid inlet, and one side of the ion liquid circulation pipeline is connected to an ion liquid filling port.

3. The ionic liquid-sealed compression cylinder assembly according to claim 1, characterized in that: A water cooling chamber is arranged on the outer side of the cylinder body, a water inlet is arranged at the bottom of the water cooling chamber, and a water outlet is arranged at the top of the water cooling chamber.

4. The ionic liquid-sealed compression cylinder assembly according to claim 1, characterized in that: The ionic liquid leakage detection system includes a pressure sensor arranged on a cylinder body on the side of the isolation chamber, the pressure sensor is used to detect the pressure signal in the isolation chamber and send it to a controller, a plurality of sealing rings are respectively arranged between the pistons and the cylinder body on the upper and lower sides of the isolation chamber for sealing, an ionic liquid discharge channel is arranged in the piston at the bottom of the isolation chamber, a one-way valve is installed in the ionic liquid discharge channel, and the ionic liquid discharge channel connects the isolation chamber with the hydraulic chamber.

5. The ionic liquid-sealed compression cylinder assembly according to claim 1, characterized in that: The ionic liquid leakage detection system includes a pressure sensor arranged on a cylinder body on the side of the isolation chamber, the pressure sensor is used to detect the pressure signal in the isolation chamber and send it to a controller, a plurality of sealing rings are respectively arranged between the piston and the cylinder body on the upper and lower sides of the isolation chamber for sealing, and the bottom of the isolation chamber is connected to a buffer container arranged on the outside of the cylinder body through an ionic liquid pipeline, and the buffer container is made of a transparent material.

6. The ionic liquid-sealed compression cylinder assembly according to claim 1, characterized in that: The air valve liquid impact prevention structure includes a buffer channel arranged in the front end cover, and a plurality of inclined channels are arranged along the circumference between the inner end surface of the front end cover and the buffer channel. The inclined channels connect the gas compression chamber with the inside of the buffer channel. The air inlet and exhaust channels are arranged horizontally, and the buffer channel is arranged vertically.

7. The ionic liquid-sealed compression cylinder assembly according to claim 1, characterized in that: The top buffer structure comprises a buffer channel arranged in the front end cover, an upper boss is arranged at a position on the top of the piston corresponding to the buffer channel, and a clearance fit is provided between the upper boss and the buffer channel.

8. The ionic liquid-sealed compression cylinder assembly according to claim 1, characterized in that: The bottom end buffer structure includes a lower boss arranged at a position on the bottom of the piston corresponding to the hydraulic oil inlet and outlet, the lower boss is clearance-matched with the hydraulic oil inlet and outlet, a plug is installed at the bottom of the lower boss, the plug is threadedly connected to the lower boss, a fine hole is arranged in the plug, and a plurality of side holes connected to the fine hole are arranged on the side of the lower boss.

9. The ionic liquid-sealed compression cylinder assembly according to claim 1, characterized in that: A plurality of sealing rings and guide rings are arranged between the piston and the cylinder body.

10. The ionic liquid-sealed compression cylinder assembly according to claim 1, characterized in that: The front end cover is connected to the cylinder body through threads, and a sealing ring is arranged between the front end cover and the cylinder body for sealing.

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