An ion liquid seal compression cylinder assembly

Abstract

The present invention relates to the technical field of ionic liquid cylinders, and in particular to an ionic liquid sealed compression cylinder assembly. An annular groove is provided on the top edge of the piston, and ionic liquid is provided in the annular groove. 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; an air valve anti-liquid impact structure is provided in the front cover; a top buffer structure is provided between the piston and the front cover, and a bottom buffer structure is provided between the piston and the rear cover. The amount of ionic liquid used is greatly reduced, and the cost of the entire compression cylinder is reduced. Part of the ionic liquid discharged with the gas can be recycled and reused, avoiding the consumption and waste of ionic liquid. The pressure sensor is used to detect the pressure signal in the isolation chamber and send it to the controller. The staff can stop the machine for maintenance in time to ensure the safety of the equipment. The air valve anti-liquid impact structure can reduce the impact of the ionic liquid on the intake valve and exhaust valve, ensuring the service life of the intake valve and exhaust valve.

Description

Technical field:

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

[0002] Currently, ion liquid-sealed compression cylinders are a new type of equipment used to boost gas pressure in hydrogen refueling stations. Patent application publication number CN116044712A discloses an ionic liquid compressor. Ionic liquid is injected into the compression chamber of the cylinder to cool and lubricate the piston and improve the seal between the piston and cylinder. Hydraulic oil is pumped into and out of the hydraulic chamber at the bottom of the cylinder to hydraulically drive the piston up and down. However, existing ionic liquid cylinders of this type have the following shortcomings 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 decreased 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, or between the bottom of the piston and the rear cover. The collision force is large, and long-term operation will cause deformation and damage to the piston and the end cover, affecting the service life.

[0007] In summary, the above-mentioned problems in ionic liquid cylinders have become technical difficulties 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 problems of large ion liquid usage and high cost in previous ion liquid cylinders, solves the problem of ion liquid leakage not being able to be detected and replenished in a timely manner, solves the problem of ion liquid accompanying the gas causing impact on the intake valve and exhaust valve, affecting the service life, and solves the problem of large collision force on the front cover and rear end 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 includes a cylinder body, a front cover and a rear cover are provided at both ends of the cylinder body, an intake valve and an exhaust valve are provided on the front 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 cover, a hydraulic chamber is provided between the piston and the rear cover, and a hydraulic oil inlet and outlet are provided on the rear cover;

[0011] An annular groove is provided on the top edge of the piston, and an ionic liquid is provided in the annular groove. The ionic liquid is used to cool, lubricate and seal the piston and the cylinder body. An ionic liquid inlet is provided on the side wall of the cylinder body on one side of the gas compression chamber, 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 ionic liquid circulation system includes 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 ionic liquid circulation pipeline, a switch valve is provided on the ionic liquid circulation pipeline, the other end of the ionic liquid circulation pipeline is connected to the ionic liquid inlet, and one side of the ionic liquid circulation pipeline is connected to an ionic liquid filling port.

[0016] A water cooling cavity is provided on the outside of the cylinder body, a water inlet is provided at the bottom of the water cooling cavity, and a water outlet is provided at the top of the water cooling cavity.

[0017] The ionic liquid leakage detection system includes a pressure sensor provided 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. Several sealing rings are respectively provided 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 provided in the piston at the bottom of the isolation chamber. A one-way valve is installed in the ionic liquid discharge channel. 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 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. Several sealing rings are respectively provided between the pistons and the cylinder body on the upper and lower sides of the isolation chamber for sealing. The bottom of the isolation chamber is connected to the buffer container arranged on the outside of the cylinder body through the ionic liquid pipeline. The buffer container is made of transparent material.

[0019] The air valve liquid impact prevention structure includes a buffer channel arranged in the front end cover, and several 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 interior of the buffer channel. The air intake and exhaust channels are arranged horizontally, and the buffer channel is arranged vertically.

[0020] The top buffer structure includes a buffer channel arranged in the front end cover, and an upper boss is provided 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 corresponding to the hydraulic oil inlet and outlet at the bottom of the piston. 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 provided in the plug. The side of the lower boss is provided with a plurality of side holes connected to the fine hole.

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

[0023] The front end cover and the cylinder body are connected via threads, and a sealing ring is provided between the front end cover and the cylinder body for sealing.

[0024] The present invention adopts the above solution 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, while ensuring that the ionic liquid cools, lubricates and seals the piston and the cylinder body, the previous method of completely covering the top of the piston with ionic liquid is changed, 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. 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, and 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, and 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 the 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, and the staff can shut down the machine for maintenance in time to ensure the safety of the equipment.

[0028] By providing a buffer channel in the front end cover, a number 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 gathers in the buffer channel, it generates great resistance, the ionic liquid is blocked, and the impact force is weakened, thereby reducing the impact of the ionic 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 end 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 end cover, reducing the collision force between the top of the piston and the front end cover, and protecting the top of the piston and the front end 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. 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 end cover, reducing the collision force between the bottom of the piston and the rear end cover, and protecting the bottom of the piston and the rear end cover, avoiding deformation and damage of the piston and the front and rear end covers due to collision, and ensuring their service life. Description of the drawings:

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

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

[0032] Figure 3 This is a structural diagram 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 this 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 seal compression cylinder assembly includes 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 channel 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, which can realize 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 channel 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 channel 6 and the exhaust valve 5, thereby realizing gas pressurization.

[0036] An annular groove 11 is provided on 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 between 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, and 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 operating, piston 7 pressurizes the gas. The pressurized gas carries some ionic liquid with it and is discharged from exhaust valve 5. It then enters gas-liquid separator 16 via gas-liquid output line 15. Inside gas-liquid separator 16, the ionic liquid and gas are separated, and the separated gas is discharged from gas outlet 17. The separated ionic liquid is then returned to ionic liquid inlet 13 via ionic liquid circulation line 18 and injected into annular groove 11. Because the pressure inside gas-liquid separator 16 is greater than the pressure at ionic liquid inlet 13, the entire ionic liquid circulation system does not require additional power and circulates the ionic liquid using a pressure differential. Staff can also regularly inject new ionic liquid through ionic liquid filling port 20 to replenish the ionic liquid in annular groove 11.

[0038] A water cooling chamber 21 is provided on the outside of the cylinder body 1 , a water inlet 22 is provided at the bottom of the water cooling chamber 21 , and a water outlet 23 is provided at the top of the water cooling chamber 21 , so as to realize circulating water cooling on the outside of the cylinder body 1 .

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

[0040] One of the ionic liquid leakage detection systems includes a pressure sensor 24 provided 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. Several sealing rings 25 are respectively provided 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 provided in the piston 7 at the bottom of the isolation chamber 14. 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 sent to the controller, and the controller sends an alarm signal to remind the staff to stop 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 provided 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. Several sealing rings 25 are respectively provided 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 the buffer container 29 provided on the outside of the cylinder body 1 through the 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, thereby supplementing 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 an abnormal pressure in the isolation chamber 14, it feeds back a signal 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 valve anti-liquid impact structure; the valve anti-liquid impact structure includes a buffer channel 30 provided in the front end cover 2. 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. The inclined channels 31 connect the gas compression chamber 8 with the interior of the buffer channel 30. The inlet and outlet channels 6 are arranged horizontally, and the buffer channel 30 is arranged vertically, with the inlet and outlet channels 6 and the buffer channel 30 being perpendicular. This design ensures that when 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, thereby reducing 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, the gas generates great resistance when it 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, and 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. The top buffer structure includes a buffer channel 30 provided in the front end cover 2. An upper boss 32 is provided at the top of the piston 7 at a position corresponding to the buffer channel 30. The upper boss 32 and the buffer channel 30 are clearance-matched. When the piston 6 ascends to the top, after the upper boss 32 enters the buffer channel 30, the clearance between the upper boss 32 and the buffer channel 30 is very small, and the discharge speed of the gas remaining in the gas compression chamber 8 is slowed down. This gas then acts as a buffer 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 thus 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. The bottom buffer structure includes a lower boss 33 provided at a position at the bottom of the piston 7 corresponding to the hydraulic oil inlet and outlet 10. The lower boss 33 and the hydraulic oil inlet and outlet 10 are clearance-fitted. A plug 34 is installed at the bottom of the lower boss 33. The plug 34 is threadedly connected to the lower boss 33. A fine hole 35 is provided in the plug 34. The side of the lower boss 33 is provided with a plurality of side holes 36 connected to the fine hole 35. When the piston 6 descends to the bottom, after the lower boss 33 enters the hydraulic oil inlet 10, the gap between the lower boss 33 and the hydraulic oil inlet 10 is very small. At the same time, a plug 34 is installed at the bottom of the lower boss 33, and a small hole 35 is provided in the plug 34. This allows some of the hydraulic oil in the hydraulic chamber 9 to be discharged through the gap between the lower boss 33 and the hydraulic oil inlet 10, while the remaining part enters the small hole 35 and is discharged through the side hole 36 of the lower boss 33. This slows the discharge of the hydraulic oil, and this hydraulic oil acts as a buffer between the bottom of the piston 7 and the rear end cover 3, reducing the collision force between the bottom of the piston 7 and the rear end cover 3, protecting the bottom of the piston 7 and the rear end cover 3, and preventing the piston 7 and the rear end cover 3 from deformation and damage due to collision, thereby ensuring their service life. When the piston 7 descends to the bottom, the bottom of the lower boss 33 can be exactly located within the hydraulic oil inlet 10, which can reduce the overall piston length and reduce the height of the entire machine. The bottom of the lower boss 33 can also be extended to the outside of the hydraulic oil inlet 10, which can reduce the volume of the hydraulic chamber and increase the pressure in 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 perform sealing and guiding functions.

[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 replacement, improvement or transformation made to the implementation manner of the present invention falls within the protection scope of the present invention.

[0048] Any matters not described in detail in the present invention are well-known technologies to those skilled in the art.

Claims

1. An ion liquid sealed compression cylinder assembly, characterized by: It includes a cylinder body, with a front cover and a rear cover at both ends of the cylinder body, an intake valve and an exhaust valve on the front cover, an intake and exhaust passage between the intake valve and the exhaust valve, a piston in the cylinder body, a gas compression chamber between the piston and the front cover, a hydraulic chamber between the piston and the rear cover, and a hydraulic oil inlet and outlet on the rear cover; An annular groove is provided on the top edge of the piston, and an ionic liquid is provided in the annular groove. The ionic liquid is used to cool, lubricate and seal the piston and the cylinder body. An ionic liquid inlet is provided on the side wall of the cylinder body on one side of the gas compression chamber, 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 buffer structure is provided between the piston and the front end cover, and a bottom buffer structure is provided between the piston and the rear end cover; The air valve liquid impact prevention structure includes a buffer channel arranged in the front end cover, and several 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 interior of the buffer channel. The air intake and exhaust channels are arranged horizontally, and the buffer channel is arranged vertically.

2. The ionic liquid-sealed compression cylinder assembly according to claim 1, characterized in that: The ionic liquid circulation system includes 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 ionic liquid circulation pipeline, a switch valve is provided on the ionic liquid circulation pipeline, the other end of the ionic liquid circulation pipeline is connected to the ionic liquid inlet, and one side of the ionic liquid circulation pipeline is connected to an ionic liquid filling port.

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

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 provided 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. Several sealing rings are respectively provided 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 provided in the piston at the bottom of the isolation chamber. A one-way valve is installed in the ionic liquid discharge channel. 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 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. Several sealing rings are respectively provided between the pistons and the cylinder body on the upper and lower sides of the isolation chamber for sealing. The bottom of the isolation chamber is connected to the buffer container arranged on the outside of the cylinder body through the ionic liquid pipeline. The buffer container is made of transparent material.

6. The ionic liquid-sealed compression cylinder assembly according to claim 1, characterized in that: The top buffer structure includes a buffer channel arranged in the front end cover, and an upper boss is provided 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.

7. 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 corresponding to the hydraulic oil inlet and outlet at the bottom of the piston. 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 provided in the plug. The side of the lower boss is provided with a plurality of side holes connected to the fine hole.

8. 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.

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

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