Thin-wall ultrahigh-pressure oil cylinder with sealing performance self-checking function

Abstract

The invention discloses a thin-wall ultrahigh-pressure oil cylinder with a sealing performance self-checking function, and relates to the technical field of oil cylinders. Comprising a liquid supply system and a control system, an oil cylinder comprises a cylinder body, an oil inlet and an oil outlet are formed in the two ends of the cylinder body and connected with the liquid supply system, the liquid supply system is used for conveying oil, a piston rod is slidably installed in the cylinder body and connected with an upper piston, and a lower piston is installed below the upper piston. Sealing rings are installed on the outer sides of the upper piston and the lower piston, a sleeve is connected between the upper piston and the lower piston, a bimetallic strip is installed in the sleeve, the higher the temperature of a cylinder body or oil liquid is, the larger the downward bending degree of the bimetallic strip is, the longer the downward moving distance of a contact plate driven by the bimetallic strip is, and the more the downward moving distance of a sliding ring driven by the contact plate is. The smaller the effective resistance of the coil is, the larger the current flowing through the two semiconductors on the refrigeration plate is, the better the refrigeration effect is, the change of the refrigeration effect is automatically realized, and the system is more intelligent and convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of oil cylinders, in particular to a thin-walled ultra-high-pressure oil cylinder with sealing self-inspection function. Background Art

[0002] A cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy, primarily used to achieve linear reciprocating or oscillating motion. With its simple structure and reliable operation, cylinders are widely used in various mechanical equipment, providing powerful force and precise control, enabling machines to efficiently complete various tasks.

[0003] The existing oil cylinders have the following main problems: (1) the oil cylinder seal is not in place and is prone to leakage; (2) the oil cylinder is not cooled in time, resulting in a shortened service life. Summary of the Invention

[0004] The purpose of the present invention is to provide a thin-walled ultra-high pressure oil cylinder with sealing self-testing function, so as to solve the problems raised in the prior art.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a thin-walled ultra-high-pressure oil cylinder with self-testing sealing properties, comprising a liquid supply system and a control system, the oil cylinder comprising a cylinder body, an oil inlet and an oil outlet being provided at both ends of the cylinder body, the oil inlet and the oil outlet being both connected to the liquid supply system, the liquid supply system being used to transport oil, a piston rod being slidably installed in the cylinder body, the piston rod being connected to an upper piston, a lower piston being installed below the upper piston, sealing rings being installed on the outsides of the upper and lower pistons, and a sleeve being connected between the upper and lower pistons.

[0006] The interior of the sleeve is hollow, and two groups of partitions are sequentially installed in the middle of the sleeve, the upper partition is installed on the sleeve, and the lower partition is slidably installed on the sleeve. A reset spring and a flexible membrane are connected between the two groups of partitions, and the flexible membrane is located outside the reset spring and is made of a flexible material;

[0007] A magnetic material is provided on the partition below, and an electromagnet is provided at the bottom of the cylinder body opposite to the magnetic material. The magnetic properties of the magnetic material and the electromagnet are the same on the opposite side. A conveying chamber is formed between the two groups of partitions and the flexible membrane, and a cooling medium is provided in the conveying chamber.

[0008] A first vortex tube and a second vortex tube are respectively provided in the upper and lower partitions, and both the first vortex tube and the second vortex tube are planar threaded structures. Both the first vortex tube and the second vortex tube are hollow inside, and a plurality of first temperature difference plates and refrigeration plates are respectively provided on the inner walls of the first vortex tube and the second vortex tube. The outlet of the first vortex tube and the inlet of the second vortex tube are both connected to the conveying chamber, and a one-way valve and a flow meter are installed in the first vortex tube and the second vortex tube.

[0009] A coil is provided on one side of the upper partition, and a bimetallic plate is installed on the outside of the coil. The bimetallic plate is installed on the inner wall of the sleeve. The bimetallic plate is composed of two metal sheets with different expansion coefficients. The expansion coefficient of the upper metal sheet is greater than the expansion coefficient of the lower metal sheet. The two metal sheets with different expansion coefficients are welded to each other. An insulating plate is commonly provided on one side of the two metal sheets, and a contact plate is provided on one side of the insulating plate. A slip ring is in sliding contact with the outside of the coil, and the contact plate and the slip ring are connected. The contact plate and the slip ring are both made of metal.

[0010] During the operation of the oil cylinder, the temperature of the interior of the cylinder body and the oil will increase, and the oil transfers heat to the bimetallic plate in the upper piston. The temperature of the bimetallic plate increases. Since the bimetallic plate is composed of two metal sheets with different expansion coefficients, and the metal sheet with the smaller expansion coefficient is located on the lower side, the bimetallic plate bends downward as a whole, and the bimetallic plate drives the insulating plate to move downward, and the insulating plate drives the contact plate to move downward, and the contact plate drives the slip ring to move downward. The slip ring slides downward on the coil, reducing the number of turns between the slip ring and the lower end of the coil, reducing the effective resistance of the coil, and increasing the current flowing through the regulation circuit. At this time, the current flowing through the two semiconductors on the cooling plate increases, the cooling effect of the cooling end becomes stronger, and the cooling effect of the cooling end on the cooling medium is significantly improved; the effective resistance of the coil refers to the resistance corresponding to the number of turns between the slip ring and the lower end of the coil;

[0011] Therefore, the higher the temperature of the cylinder or oil, the greater the degree of downward bending of the bimetallic plate, the greater the distance the bimetallic plate drives the contact plate to move downward, the more the contact plate drives the slip ring to move downward, the smaller the effective resistance of the coil, the greater the current flowing through the two semiconductors on the cooling plate, and the better the cooling effect. The present application drives the slip ring to move synchronously through the heat generated by the oil cylinder, thereby changing the cooling effect accordingly, automatically realizing the change of the cooling effect, and is more intelligent and convenient.

[0012] An inlet channel and an outlet channel are provided in the piston rod. The inlet of the inlet channel and the outlet of the outlet channel are connected to each other. The outlet of the inlet channel is connected to the inlet of the first vortex tube through a pipe. The outlet channel is connected to the outlet of the second vortex tube after passing through the upper partition through a pipe.

[0013] Two sets of positioning plates are slidably installed on the outside of the upper piston and the lower piston. The two sets of positioning plates are mirror-imaged. The sealing ring is set between the two sets of positioning plates. The two sets of positioning plates are respectively connected to the upper piston and the lower piston with a first spring. The outer side of the sealing ring contacts the inner wall of the cylinder body. The two sets of positioning plates are respectively provided with an extrusion edge on the opposite side, and the extrusion edge contacts the inner side of the sealing ring. The two sets of positioning plates are respectively compressed by the first spring, and the sealing ring is squeezed onto the cylinder body by the extrusion edges on the two sets of positioning plates to prevent the sealing ring from deforming or falling off during the operation of the cylinder, so as to ensure the sealing of the cylinder. The flow meters in the oil inlet and outlet detect the flow of the oil. When the detected flow data is less than the set flow data, the cylinder leaks. When the detected flow data is consistent with the set data, the cylinder can work normally, so as to realize the self-test of the sealing of the cylinder.

[0014] By squeezing two sets of positioning plates, the sealing ring can be automatically ensured to always be in contact with the inner wall of the cylinder body, so as to ensure that the cylinder is in a better sealing state and prevent the cylinder from leaking.

[0015] The inlet flow channel is distributed in a spiral manner, is located on one side of the outlet flow channel, and has a diameter smaller than that of the outlet flow channel.

[0016] The outer wall of the cylinder body is provided with several second temperature difference plates, and the first temperature difference plates and the second temperature difference plates correspond to each other one by one. The first temperature difference plate, the second temperature difference plate and the refrigeration plate are all provided with a connecting plate and two semiconductors of different materials. The connecting plate is made of metal, and one end of the semiconductors of two different materials are connected to the connecting plate. The two semiconductors on the first temperature difference plate are connected to the two semiconductors on the second temperature difference plate through wires passing through the piston rod and the upper piston, one of which is connected to the control system. The two semiconductors on the refrigeration plate are respectively connected to the control system and the contact plate through wires, and the coil is electrically connected to the control system.

[0017] Another set of flow meters is installed in the oil inlet and the oil outlet, and the flow meters in the oil inlet and the oil outlet are electrically connected to the control system.

[0018] A control panel is provided on the cylinder body, and the control system is provided in the control panel.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The cooling effect changes with the cylinder temperature, making it more intelligent. The higher the temperature of the cylinder or oil, the greater the downward bending of the bimetallic plate, the greater the distance the bimetallic plate drives the contact plate downward, and the further the contact plate drives the slip ring downward, the smaller the effective resistance of the coil, the greater the current flowing through the two semiconductors on the cooling plate, and the better the cooling effect. This application uses the heat generated by the oil cylinder to drive the synchronous movement of the slip ring, thereby changing the cooling effect accordingly, automatically achieving the change in cooling effect, which is more intelligent and convenient.

[0021] 2. Recycling internal energy in the cylinder reduces energy consumption. The two semiconductors and the connecting plate on the first thermocouple act as the hot end of the Seebeck effect, while the two semiconductors and the connecting plate on the second thermocouple act as the cold end. Because the hot end is in contact with the heated cooling medium and the cold end is in contact with the outside air, the hot end is hotter than the cold end. The hot and cold ends generate current through the Seebeck effect and transmit it to the control system. The control system processes this current and uses it to cool the cooling end, thereby reducing energy consumption in the cylinder. Compared to traditional fan cooling, this method of cooling by utilizing internal energy in the cylinder ensures more stable operation without external energy consumption.

[0022] 3. The sealing ring is squeezed to ensure the sealing of the oil cylinder. The two sets of positioning plates are respectively compressed by the first spring. The sealing ring is squeezed onto the cylinder body by the extrusion edges on the two sets of positioning plates to prevent the sealing ring from deforming or falling off during the operation of the oil cylinder, so as to ensure the sealing of the oil cylinder. The flow meters in the oil inlet and outlet detect the flow of the oil. When the detected flow data is less than the set flow data, the oil cylinder leaks. When the detected flow data is consistent with the set data, the oil cylinder can work normally, so as to realize the self-test of the sealing of the oil cylinder. The squeezing method of the two sets of positioning plates can automatically ensure that the sealing ring is always in contact with the inner wall of the cylinder body, so as to ensure that the oil cylinder is in a good sealing state and prevent the oil cylinder from leaking. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic structural diagram of the present invention as a whole;

[0024] Figure 2 is a cross-sectional view of the present invention as a whole;

[0025] Figure 3 yes Figure 2 A partial enlarged view of area A in the middle;

[0026] Figure 4 It is a structural schematic diagram of the sealing ring in the present invention;

[0027] Figure 5 It is a structural schematic diagram of the positioning plate in the present invention;

[0028] Figure 6It is a structural schematic diagram of the slip ring in the present invention;

[0029] Figure 7 It is a schematic structural diagram of the first vortex tube and the second vortex tube in the present invention.

[0030] In the figure: 1. control panel; 11. cylinder body; 111. oil inlet; 112. oil outlet; 113. electromagnet; 114. second temperature difference plate; 2. piston rod; 201. inlet channel; 202. outlet channel; 21. upper piston; 22. lower piston; 221. positioning plate; 23. sealing ring; 24. sleeve; 241. cooling plate; 242. partition; 243. flexible membrane; 244. first vortex tube; 245. second vortex tube; 246. first temperature difference plate; 247. coil; 248. bimetallic plate; 249. contact plate; 25. slip ring. DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] Example: Figure 1-Figure 7 As shown, the present invention provides a technical solution for a thin-walled ultra-high-pressure oil cylinder with self-testing sealing, including a liquid supply system (not shown in the figure), a control system and a cylinder body 11. An oil inlet 111 and an oil outlet 112 are provided at both ends of the cylinder body 11. The oil inlet 111 and the oil outlet 112 are both connected to the liquid supply system. The liquid supply system is used to transport oil. A piston rod 2 is slidably installed in the cylinder body 11, and the piston rod 2 is connected to an upper piston 21. A lower piston 22 is installed below the upper piston 21. Sealing rings 23 are installed on the outside of the upper piston 21 and the lower piston 22. A sleeve 24 is connected between the upper piston 21 and the lower piston 22. A control panel 1 is provided on the cylinder body 11, and the control system is arranged in the control panel 1.

[0033] The interior of the sleeve 24 is hollow, and two groups of partitions 242 are installed in the middle of the sleeve 24 in sequence. The upper partition 242 is installed on the sleeve 24, and the lower partition 242 is slidably installed on the sleeve 24. A reset spring (not shown in the figure) and a flexible membrane 243 are connected between the two groups of partitions 242. The flexible membrane 243 is located on the outside of the reset spring and is made of a flexible material. A magnetic material is provided on the lower partition 242, and an electromagnet 113 is provided at the bottom of the cylinder 11 opposite to the magnetic material. The magnetic material and the side opposite to the electromagnet 113 have the same magnetism, and a conveying cavity is formed between the two groups of partitions 242 and the flexible membrane 243. chamber, a cooling medium is arranged in the conveying chamber; a first vortex tube 244 and a second vortex tube 245 are respectively arranged in the upper and lower partitions 242, the first vortex tube 244 and the second vortex tube 245 are both of flat threaded structure, the first vortex tube 244 and the second vortex tube 245 are both hollow inside, and a plurality of first temperature difference plates 246 and refrigeration plates 241 are respectively arranged on the inner walls of the first vortex tube 244 and the second vortex tube 245, the outlet of the first vortex tube 244 and the inlet of the second vortex tube 245 are both communicated with the conveying chamber, and a one-way valve and a flow meter are installed in the first vortex tube 244 and the second vortex tube 245.

[0034] A coil 247 is provided on one side of the upper partition 242, and a bimetallic plate 248 is installed on the outside of the coil 247. The bimetallic plate 248 is installed on the inner wall of the sleeve 24. The bimetallic plate 248 is composed of two metal sheets with different expansion coefficients. The expansion coefficient of the upper metal sheet is greater than the expansion coefficient of the lower metal sheet. The two metal sheets with different expansion coefficients are welded to each other. An insulating plate is provided on one side of the two metal sheets, and a contact plate 249 is provided on one side of the insulating plate. A slip ring 25 is in sliding contact with the outside of the coil 247. The contact plate 249 and the slip ring 25 are connected. The contact plate 249 and the slip ring 25 are both made of metal.

[0035] During the operation of the oil cylinder, the temperature of the interior of the cylinder body 11 and the oil will increase, and the oil transfers heat to the bimetallic plate 248 in the upper piston 21. The temperature of the bimetallic plate 248 increases. Since the bimetallic plate 248 is composed of two metal sheets with different expansion coefficients, and the metal sheet with the smaller expansion coefficient is located on the lower side, the bimetallic plate 248 bends downward as a whole, and the bimetallic plate 248 drives the insulating plate to move downward, and the insulating plate drives the contact plate 249 to move downward, and the contact plate 249 drives the slip ring 25 to move downward. The slip ring 25 slides downward on the coil 247, so that the number of turns between the slip ring 25 and the lower end of the coil 247 becomes less, and the effective resistance of the coil 247 is reduced, so that the current flowing through the regulation circuit becomes larger. At this time, the current flowing through the two semiconductors on the cooling plate 241 becomes larger, the cooling effect of the cooling end becomes stronger, and the cooling effect of the cooling end on the cooling medium is significantly improved; the effective resistance of the coil 247 refers to the resistance corresponding to the number of turns between the slip ring 25 and the lower end of the coil 247;

[0036] Therefore, the higher the temperature of the cylinder 11 or the oil, the greater the degree to which the bimetallic plate 248 bends downward, the greater the distance the bimetallic plate 248 drives the contact plate 249 to move downward, the more the contact plate 249 drives the slip ring 25 to move downward, the smaller the effective resistance of the coil 247, the greater the current flowing through the two semiconductors on the cooling plate 241, and the better the cooling effect. The present application drives the slip ring 25 to move synchronously through the heat generated by the oil cylinder, thereby changing the cooling effect accordingly, automatically realizing the change in cooling effect, and is more intelligent and convenient.

[0037] An inlet channel 201 and an outlet channel 202 are provided in the piston rod 2. The inlet of the inlet channel 201 and the outlet of the outlet channel 202 are connected to each other. The outlet of the inlet channel 201 is connected to the inlet of the first vortex tube 244 through a pipeline. The outlet channel 202 is connected to the outlet of the second vortex tube 245 after passing through the upper partition 242 through the pipeline. The inlet channel 201 is spirally distributed. The inlet channel 201 is located on one side of the outlet channel 202. The diameter of the inlet channel 201 is smaller than the diameter of the outlet channel 202. Another set of flow meters is installed in the oil inlet 111 and the oil outlet 112. The flow meters in the oil inlet 111 and the oil outlet 112 are electrically connected to the control system.

[0038] Two sets of positioning plates 221 are slidably installed on the outside of the upper piston 21 and the lower piston 22. The two sets of positioning plates 221 are mirror-imaged. The sealing ring 23 is arranged between the two sets of positioning plates 221. The two sets of positioning plates 221 are respectively connected to the upper piston 21 and the lower piston 22 with a first spring (not shown in the figure). The outer side of the sealing ring 23 contacts the inner wall of the cylinder body 11, and the opposite side of the two sets of positioning plates 221 is provided with an extrusion edge, which contacts the inner side of the sealing ring 23. The two groups of positioning plates 221 are respectively compressed by the first spring, and the sealing ring 23 is squeezed onto the cylinder body 11 by the extrusion edges on the two groups of positioning plates 221 to prevent the sealing ring 23 from being deformed or falling off during the operation of the cylinder to ensure the sealing of the cylinder. The flow meters in the oil inlet 111 and the oil outlet 112 detect the flow of oil. When the detected flow data is less than the set flow data, the cylinder leaks. When the detected flow data is consistent with the set data, the cylinder can work normally to realize the self-inspection of the sealing of the cylinder; through the extrusion of the two groups of positioning plates 221, it can be automatically ensured that the sealing ring 23 is always in contact with the inner wall of the cylinder body 11 to ensure that the cylinder is in a better sealing state and prevent the cylinder from leaking.

[0039] Several second temperature difference plates 114 are provided on the outer wall of the cylinder body 11, and the first temperature difference plate 246 and the second temperature difference plate 114 correspond one to one. The first temperature difference plate 246, the second temperature difference plate 114 and the refrigeration plate 241 are all provided with a connecting plate and two semiconductors of different materials. The connecting plate is made of metal, and one end of the two semiconductors of different materials are connected to the connecting plate. The two semiconductors on the first temperature difference plate 246 are connected to the two semiconductors on the second temperature difference plate 114 through wires passing through the piston rod 2 and the upper piston 21, one of which is connected to the control system. The two semiconductors on the refrigeration plate 241 are respectively connected to the control system and the contact plate 249 through wires, and the coil 247 is electrically connected to the control system.

[0040] Working principle: Press the start button on the control panel 1 to start the oil cylinder. The control system delivers oil to the oil inlet 111 through the oil supply system. The oil enters the cylinder body 11 through the oil inlet 111. As the oil continues to enter, the oil pushes the upper piston 21, the piston rod 2 and the lower piston 22 to move downward. The oil under the lower piston 22 is discharged into the oil supply system through the oil outlet 112, thereby realizing the downward movement of the upper piston 21, the piston rod 2 and the lower piston 22.

[0041] When the lower piston 22 moves to the bottom of the cylinder body 11, the liquid supply system feeds back the pressure signal of the oil at the oil inlet 111 to the control system, and the control system controls the liquid supply system to transport the oil to the oil outlet 112, and the oil enters the cylinder body 11 from the oil outlet 112. As the oil continues to enter, the oil pushes the lower piston 22, the upper piston 21 and the piston rod 2 to move upward, and the oil on the upper side of the upper piston 21 is discharged into the liquid supply system through the oil inlet 111. The oil transported by the liquid supply system drives the upper piston 21, the lower piston 22 and the piston rod 2 to move up and down, so as to realize the normal operation of the oil cylinder, and the flow meters in the oil inlet 111 and the oil outlet 112 detect the flow data of the oil in real time, and then determine whether there is a leak through the control system.

[0042] During the downward movement of the upper piston 21, the lower piston 22 and the piston rod 2, the liquid supply system feeds back the pressure data of the oil in the oil inlet 111 to the control system, and the control system energizes the electromagnet 113 so that the electromagnet 113 has the same magnetic properties as the side opposite to the magnetic material. The upper piston 21 and the lower piston 22 drive the sleeve 24 to move downward, and the sleeve 24 drives the two sets of partitions 242 to move downward, so that the magnetic material on the lower partition 242 is close to the electromagnet 113 on the cylinder body 11. Since the electromagnet 113 and the side opposite to the magnetic material have the same magnetic properties, under the action of the magnetic field repulsion force, the magnetic material drives the lower partition 242 to move upward, and the lower partition 242 compresses the reset spring at the same time, and the lower partition 242 squeezes the cooling medium in the conveying chamber through the pipeline to the inlet of the second vortex tube 245;

[0043] When the cooling medium enters the second vortex tube 245, the flow meter in the second vortex tube 245 feeds back the flow data of the cooling medium to the control system, and the control system connects the semiconductor connected to the control system on the refrigeration plate 241 and the contact plate 249 to the circuit. The current enters from the contact plate 249, flows through the effective turns of the coil 247, and then flows out from one end of the coil 247 to the control system. The control system then transmits the current to the two semiconductors and the connecting plate and then returns to the contact plate 249 to form a regulation loop. The two semiconductors and the connecting plate on the refrigeration plate 241 are the refrigeration ends of the Peltier effect, and the cooling medium in the second vortex tube 245 is cooled by the refrigeration end. Since a number of refrigeration plates 241 are provided, the cooling medium can be quickly cooled. The cooling medium also cools the upper piston 21 and the lower piston 22 through the second vortex tube 245, so that the temperature of the upper piston 21 and the lower piston 22 drops, preventing the temperature of the upper piston 21 and the lower piston 22 from being too high, thereby extending the service life of the upper piston 21 and the lower piston 22.

[0044] After the upper piston 21 and the lower piston 22 move downward to the bottom of the cylinder 11, the upper piston 21 and the lower piston 22 will move upward. At this time, the liquid supply system feeds back the pressure data of the oil in the oil outlet 112 to the control system, and the control system cuts off the power to the electromagnet 113. The magnetic field force between the electromagnet 113 and the magnetic material disappears, and the upper piston 21 and the lower piston 22 drive the sleeve 24 to move upward. The sleeve 24 drives the two sets of partitions 242 to move upward, so that the magnetic material on the lower partition 242 is away from the electromagnet 113. At this time, the reset spring is Release, the reset tension spring pushes the lower partition 242 to move downward to enlarge the delivery chamber. As the delivery chamber enlarges, the cooling medium in the second vortex tube 245 is sucked into the outlet channel 202 and the inlet channel 201 in turn, and the piston rod 2 is cooled through the inlet channel 201, and the interior of the cylinder 11 and the oil are cooled through the piston rod 2. Since the inlet channel 201 is spirally distributed, the delivery time of the cooling medium is extended, and the cooling effect of the cooling medium on the cylinder 11 and the oil is increased. The temperature of the cooling medium will increase after heat exchange with the cylinder 11 and the oil.

[0045] As the upper piston 21 and the lower piston 22 continue to move up and down, more and more cooling medium is transported through the delivery chamber to the outlet channel 202, the inlet channel 201, the first vortex tube 244 and the second vortex tube 245 in sequence, and then returns to the delivery chamber again;

[0046] After the cooling medium exchanges heat with the cylinder 11 and the oil, the temperature will increase. At this time, the oil with increased temperature will enter the first vortex tube 244. The flow meter in the first vortex tube 244 will feed back the flow data of the cooling medium to the control system. The control system connects the two semiconductors on the first temperature difference plate 246 and the second temperature difference plate 114 to the circuit. The two semiconductors and the connecting plate on the first temperature difference plate 246 are the hot end of the Seebeck effect, and the two semiconductors and the connecting plate on the second temperature difference plate 114 are the cold end of the Seebeck effect. Since the hot end is in contact with the heated cooling medium and the cold end is in contact with the external air, the temperature of the hot end is higher than that of the cold end. The hot end and the cold end generate current through the Seebeck effect and transmit it to the control system. The control system processes the current and uses it to cool the refrigeration end to reduce the energy consumption of the cylinder. Compared with traditional fan cooling, the method of using the energy in the cylinder for cooling makes the cylinder work more stably and does not consume external energy.

[0047] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A thin-walled ultra-high-pressure oil cylinder with self-tightening sealing function, comprising a liquid supply system and a control system, characterized in that: The oil cylinder comprises a cylinder body (11), and an oil inlet (111) and an oil outlet (112) are provided at both ends of the cylinder body (11). The oil inlet (111) and the oil outlet (112) are both connected to a liquid supply system, and the liquid supply system is used to transport oil. A piston rod (2) is slidably installed in the cylinder body (11), and the piston rod (2) is connected to an upper piston (21). A lower piston (22) is installed below the upper piston (21). Sealing rings (23) are installed on the outer sides of the upper piston (21) and the lower piston (22). A sleeve (24) is connected between the upper piston (21) and the lower piston (22).

2. The thin-walled ultra-high pressure oil cylinder with sealing self-checking function according to claim 1, characterized in that: The interior of the sleeve (24) is hollow, and two groups of partitions (242) are sequentially installed in the middle of the sleeve (24), the upper partition (242) is installed on the sleeve (24), and the lower partition (242) is slidably installed on the sleeve (24), and a reset spring and a flexible membrane (243) are connected between the two groups of partitions (242), and the flexible membrane (243) is located outside the reset spring, and the flexible membrane (243) is made of a flexible material; A magnetic material is provided on the lower partition (242), and an electromagnet (113) is provided at the bottom of the cylinder (11) opposite to the magnetic material. The magnetic material and the electromagnet (113) have the same magnetic properties on the opposite sides. A conveying chamber is formed between the two groups of partitions (242) and the flexible membrane (243), and a cooling medium is provided in the conveying chamber.

3. The thin-walled ultra-high pressure oil cylinder with sealing self-checking function according to claim 2, characterized in that: A first vortex tube (244) and a second vortex tube (245) are respectively arranged in the upper and lower partitions (242), and the first vortex tube (244) and the second vortex tube (245) are both plane thread structures. The first vortex tube (244) and the second vortex tube (245) are both hollow inside. A plurality of first temperature difference plates (246) and refrigeration plates (241) are respectively arranged on the inner walls of the first vortex tube (244) and the second vortex tube (245). The outlet of the first vortex tube (244) and the inlet of the second vortex tube (245) are both connected to the conveying chamber, and a one-way valve and a flow meter are both installed in the first vortex tube (244) and the second vortex tube (245).

4. The thin-walled ultra-high pressure oil cylinder with sealing self-checking function according to claim 3, characterized in that: A coil (247) is provided on one side of the upper partition (242), and a bimetallic plate (248) is installed on the outer side of the coil (247). The bimetallic plate (248) is installed on the inner wall of the sleeve (24). The bimetallic plate (248) is composed of two metal sheets with different expansion coefficients. The expansion coefficient of the upper metal sheet is greater than the expansion coefficient of the lower metal sheet. The two metal sheets with different expansion coefficients are welded to each other. An insulating plate is provided on one side of the two metal sheets. A contact plate (249) is provided on one side of the insulating plate. A slip ring (25) is in sliding contact with the outer side of the coil (247). The contact plate (249) and the slip ring (25) are connected. The contact plate (249) and the slip ring (25) are both made of metal.

5. The thin-walled ultra-high pressure oil cylinder with sealing self-checking function according to claim 4, characterized in that: An inlet channel (201) and an outlet channel (202) are provided in the piston rod (2); the inlet of the inlet channel (201) and the outlet of the outlet channel (202) are connected to each other; the outlet of the inlet channel (201) is connected to the inlet of the first vortex tube (244) through a pipeline; and the outlet channel (202) is connected to the outlet of the second vortex tube (245) after passing through the upper partition (242) through a pipeline.

6. The thin-walled ultra-high pressure oil cylinder with sealing self-checking function according to claim 5, characterized in that: Two groups of positioning plates (221) are slidably mounted on the outer sides of the upper piston (21) and the lower piston (22). The two groups of positioning plates (221) are mirror-imaged. The sealing ring (23) is arranged between the two groups of positioning plates (221). The two groups of positioning plates (221) are respectively connected to the upper piston (21) and the lower piston (22) with a first spring. The outer side of the sealing ring (23) contacts the inner wall of the cylinder body (11). The opposite side of the two groups of positioning plates (221) is provided with an extrusion edge, and the extrusion edge contacts the inner side of the sealing ring (23).

7. The thin-walled ultra-high pressure oil cylinder with sealing self-checking function according to claim 6, characterized in that: The inlet channel (201) is distributed in a spiral manner, the inlet channel (201) is located on one side of the outlet channel (202), and the diameter of the inlet channel (201) is smaller than the diameter of the outlet channel (202).

8. The thin-walled ultra-high pressure oil cylinder with sealing self-checking function according to claim 7, characterized in that: The outer wall of the cylinder body (11) is provided with a plurality of second temperature difference plates (114), the first temperature difference plates (246) and the second temperature difference plates (114) correspond one to one, the first temperature difference plates (246), the second temperature difference plates (114) and the refrigeration plate (241) are all provided with a connecting plate and two semiconductors of different materials, the connecting plate is made of metal, one end of the two semiconductors of different materials are connected to the connecting plate, the two semiconductors on the first temperature difference plate (246) are connected to the two semiconductors on the second temperature difference plate (114) through wires passing through the piston rod (2) and the upper piston (21), one of the wires is connected to the control system, the two semiconductors on the refrigeration plate (241) are respectively connected to the control system and the contact plate (249) through wires, and the coil (247) is electrically connected to the control system.

9. The thin-walled ultra-high pressure oil cylinder with sealing self-checking function according to claim 8, characterized in that: Another set of flow meters is installed in the oil inlet (111) and the oil outlet (112), and the flow meters in the oil inlet (111) and the oil outlet (112) are electrically connected to the control system.

10. The thin-walled ultra-high pressure oil cylinder with sealing self-checking function according to claim 9, characterized in that: A control panel (1) is provided on the cylinder body (11), and the control system is provided in the control panel (1).

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