Oil-gas separation sealing structure and controllable spring

Abstract

The oil-gas separation sealing structure comprises an integrally-formed rubber ring, a metal ring is embedded in the rubber ring, annular grooves are formed in the upper side and the lower side of the rubber ring in the circumferential direction, and an inner sealing edge and an outer sealing edge are formed in the positions, on the inner sides and the outer sides of the annular grooves, of the rubber ring respectively. An inner groove is formed in the inner circumference of the rubber ring, the upper side edge of the inner groove extends to the upper end of the inner sealing edge on the upper side, the lower side edge of the inner groove extends to the lower end of the inner sealing edge on the lower side, an outer groove is formed in the outer circumference of the rubber ring, and the upper side edge of the outer groove extends to the upper end of the outer sealing edge on the upper side. The lower side edge of the outer groove extends to the lower end of the outer sealing edge on the lower side; the upper side edges of the inner groove and the outer groove are both higher than the groove bottom of the annular groove on the upper side, and the lower side edges of the inner groove and the outer groove are both lower than the groove bottom of the annular groove on the lower side. According to the oil-gas separation sealing structure, the sealing performance is improved, and oil and gas are not prone to being mixed.

Description

Technical Field

[0001] This utility model relates to the field of controllable spring technology, and in particular to an oil-gas separation sealing structure and a controllable spring. Background Technology

[0002] The existing controllable spring includes an inner tube, an outer tube, and a piston. Air and oil are placed between the inner tube and the outer tube. The piston is slidably connected between the inner tube and the outer tube to separate the oil and air. The piston of the existing controllable spring consists of a piston body and an O-ring assembled on the outside of the piston body. The piston body and the O-ring are prone to loosening, resulting in poor sealing and easy mixing of oil and air. Utility Model Content

[0003] To address the shortcomings of existing controllable spring pistons, such as poor sealing and easy oil-gas mixing, this invention proposes an oil-gas separation and sealing structure that improves sealing performance and reduces the likelihood of oil-gas mixing.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] An oil-gas separation sealing structure includes an integrally formed rubber ring with a metal ring embedded inside. Circumferential grooves are provided on the upper and lower sides of the rubber ring, and inner and outer sealing edges are formed on the inner and outer sides of the annular grooves, respectively.

[0006] The inner circumference of the rubber ring is provided with an inner groove, the upper edge of the inner groove extends to the upper end of the upper inner sealing edge, and the lower edge of the inner groove extends to the lower end of the lower inner sealing edge. The outer circumference of the rubber ring is provided with an outer groove, the upper edge of the outer groove extends to the upper end of the upper outer sealing edge, and the lower edge of the outer groove extends to the lower end of the lower outer sealing edge.

[0007] The upper edges of both the inner and outer grooves are higher than the bottom of the upper annular groove, while the lower edges of both the inner and outer grooves are lower than the bottom of the lower annular groove.

[0008] With the above settings, firstly, the metal ring has high rigidity, which improves the rigidity and stability of the sealing structure; secondly, the inner and outer grooves on the inner and outer sides of the rubber ring reduce the resistance to movement of the rubber ring; thirdly, the rubber ring is integrally molded, which facilitates the installation of the sealing structure, makes the structure more compact, improves the sealing effect, and makes it less likely for oil and gas to mix.

[0009] Furthermore, the inner edge of the outer sealing edge, at the end furthest from the metal ring, has an inner chamfer, and the outer edge of the outer sealing edge, at the end furthest from the metal ring, has an outer chamfer.

[0010] The above setup makes it easy to install the sealing structure into the controllable spring.

[0011] Furthermore, one side of the inner chamfer extends to the inner groove, and the other side of the inner chamfer extends to the end face of the inner sealing edge; one side of the outer chamfer extends to the outer groove, and the other side of the outer chamfer extends to the end face of the outer sealing edge.

[0012] The above settings further reduce the contact area between the inner and outer sides of the sealing structure, and further reduce the resistance to the vertical movement of the sealing structure.

[0013] Furthermore, the radial distance between the inner and outer sides of the inner chamfer is d1, and the radial distance between the inner and outer sides of the outer chamfer is d2, where d2 > d1.

[0014] The above settings further enhance sealing performance and prevent oil-gas mixing.

[0015] Furthermore, the cross-section of the metal ring is square.

[0016] A controllable spring includes the aforementioned sealing structure, an inner tube, a cylinder, a piston, a piston rod, and an oil-blocking structure. The inner tube is vertically locked in the cylinder, and the piston is slidably connected in the inner tube. An inner cavity is formed between the lower side of the piston and the inner tube. The piston rod vertically passes through the upper end of the cylinder and is fixedly connected to the piston. The sealing structure is slidably connected between the inner tube and the cylinder. The inner sealing edge mates with the outer wall of the inner tube, and the outer sealing edge mates with the inner wall of the cylinder. An outer cavity is formed between the upper side of the sealing structure, the inner tube, and the cylinder. An oil passage is provided between the upper end of the inner cavity and the upper end of the outer cavity. The inner cavity, the oil passage, and the outer cavity constitute an oil chamber filled with oil. The oil-blocking structure controls the opening and closing of the oil passage. An air chamber is formed between the lower side of the sealing structure, the inner tube, and the cylinder.

[0017] Furthermore, the oil passage includes a first oil port and a second oil port. The first oil port extends vertically through the piston, and one end of the second oil port extends through to the outer wall of the piston and communicates with the upper end of the outer cavity. The other end of the second oil port communicates with the first oil port.

[0018] The oil-blocking structure includes a ejector pin and a plug. The piston rod has a mounting cavity running through it from top to bottom. The ejector pin is slidably connected in the mounting cavity. The upper end of the ejector pin protrudes from the upper end of the piston rod. The lower end of the ejector pin is connected to the plug. The plug is placed in the first oil port. The ejector pin drives the plug to move up and down to open and close the first oil port.

[0019] With the above settings, the ejector pin moves up and down, and the opening and closing of the first oil port is controlled by the plug.

[0020] Furthermore, the cross-sectional area of ​​the inner cavity is S1, and the cross-sectional area of ​​the outer cavity is S2, 1.8 <S2 / S1<2.2。

[0021] The above settings reduce wear on the sealing structure and extend its lifespan. Attached Figure Description

[0022] Figure 1This is a schematic diagram of a controllable spring as an example.

[0023] Figure 2 for Figure 1 Enlarged view of point A.

[0024] Figure 3 This is a schematic diagram showing the oil passage section open in an embodiment. Detailed Implementation

[0025] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0026] like Figures 1 to 3 An oil-gas separation sealing structure includes an integrally formed rubber ring 3, a metal ring 4 embedded in the rubber ring 3, and annular grooves 5 arranged circumferentially on the upper and lower sides of the rubber ring 3. The rubber ring 3 forms an inner sealing edge 6 and an outer sealing edge 7 on the inner and outer sides of the annular grooves 5, respectively.

[0027] The inner circumference of the rubber ring 3 is provided with an inner groove 8. The upper edge of the inner groove 8 extends to the upper end of the upper inner sealing edge 6, and the lower edge of the inner groove 8 extends to the lower end of the lower inner sealing edge 6.

[0028] The outer periphery of the rubber ring 3 is provided with an outer groove 9, the upper edge of the outer groove 9 extends to the upper end of the upper outer sealing edge 7, and the lower edge of the outer groove 9 extends to the lower end of the lower outer sealing edge 7.

[0029] The upper edges of the inner groove 8 and the outer groove 9 are both higher than the bottom of the upper annular groove 5, and the lower edges of the inner groove 8 and the outer groove 9 are both lower than the bottom of the lower annular groove 5.

[0030] Through the above settings, firstly, the metal ring 4 has high rigidity, which improves the rigidity and stability of the sealing structure; secondly, the inner groove 8 and outer groove 9 are respectively set on the inner and outer sides of the rubber ring 3 to reduce the movement resistance of the rubber ring 3; thirdly, the rubber ring 3 is integrally molded, which facilitates the installation of the sealing structure, makes the structure more compact, improves the sealing effect, and makes it less likely for oil and gas to mix.

[0031] The sealing structure of this application is used for oil-gas separation in a controllable spring and can also be used in the field of oil-gas dampers. A rubber ring 3 is integrally formed on the outside of a metal ring 4. Annular grooves 5 are symmetrically arranged on the upper and lower sides of the rubber ring 3. The openings of the annular grooves 5 are inclined inwards. An inner groove 8 is provided on the inner circumference of the rubber ring 3. The upper end of the upper inner sealing edge 6 is inclined inwards, and the lower end of the lower inner sealing edge 6 is inclined inwards. The sealing structure is installed in the controllable spring, and the upper end of the upper inner sealing edge 6 seals with the lower end of the lower inner sealing edge 6. An outer groove 9 is provided on the outer circumference of the rubber ring 3, and the upper end of the upper outer sealing edge 7 seals with the lower end of the lower outer sealing edge 7. The inner groove 8... The design of the outer groove 9 reduces the contact surface of the inner side of the rubber ring 3 and the outer side of the rubber ring 3, thereby reducing the resistance to the up-and-down movement of the rubber ring 3. The bottom of the upper annular groove 5 is lower than the upper edge of the inner groove 8 and the outer groove 9. When the pressure in the upper annular groove 5 is increased, the upper inner sealing edge 6 and the upper outer sealing edge 7 can be opened, improving the sealing effect of the upper inner sealing edge 6 and the outer sealing edge 7. The bottom of the lower annular groove 5 is higher than the lower edge of the inner groove 8 and the outer groove 9. When the pressure in the lower annular groove 5 is increased, the lower inner sealing edge 6 and the outer sealing edge 7 will be opened, improving the sealing effect and preventing oil and gas mixing.

[0032] As one implementation method, an inner chamfer 10 is provided on the inner side of the end of the inner sealing edge 6 away from the metal ring 4, and an outer chamfer 11 is provided on the inner side of the end of the outer sealing edge 7 away from the metal ring 4.

[0033] The above setup makes it easy to install the sealing structure into the controllable spring.

[0034] As one implementation, one side of the inner chamfer 10 extends to the inner groove 8, and the other side of the inner chamfer 10 extends to the end face of the inner sealing edge 6. One side of the outer chamfer 11 extends to the outer groove 9, and the other side of the outer chamfer 11 extends to the end face of the outer sealing edge 7.

[0035] The above settings further reduce the contact area between the inner and outer sides of the sealing structure, and further reduce the resistance to the vertical movement of the sealing structure.

[0036] As one implementation method, the radial distance between the inner and outer sides of the inner chamfer 10 is d1, and the radial distance between the inner and outer sides of the outer chamfer 11 is d2, where d2>d1.

[0037] The above settings further enhance sealing performance and prevent oil-gas mixing.

[0038] Specifically, the thickness of the outer sealing edge 7 in this application is greater than the thickness of the inner sealing edge 6, and the stiffness of the outer sealing edge 7 is greater than that of the inner sealing edge 6. The radial distance between the inner and outer sides of the inner chamfer 10 refers to the radial distance from the inner circumference to the outer circumference of the inner chamfer 10, and the radial distance between the inner and outer sides of the outer chamfer 11 refers to the radial distance from the inner circumference to the outer circumference of the outer chamfer 11. d2>d1, and the radial distance between the inner and outer sides of the outer chamfer 11 is larger. When the controllable spring is installed in the sealing structure, the inward deformation of the outer sealing edge 7 can be greater. That is, when the controllable spring is installed in the sealing structure, the pressure between the outer side of the outer sealing edge 7 and the controllable spring is greater, resulting in a better sealing effect.

[0039] As one implementation method, the cross-section of the metal ring 4 is square.

[0040] A controllable spring includes the aforementioned sealing structure, an inner tube 12, a cylinder 13, a piston 14, a piston rod 15, and an oil-blocking structure. The inner tube 12 is vertically locked in the cylinder 13. The piston 14 is slidably connected in the inner tube 12. An inner cavity 16 is formed between the lower side of the piston 14 and the inner tube 12. The piston rod 15 vertically penetrates the upper end of the cylinder 13 and is fixedly connected to the piston 14. The sealing structure is slidably connected between the inner tube 12 and the cylinder 13. The inner sealing edge 6 cooperates with the outer wall of the inner tube 12, and the outer sealing edge 7 cooperates with the inner wall of the cylinder 13. An outer cavity 17 is formed between the upper side of the sealing structure and the inner tube 12 and the cylinder 13. An oil passage is provided between the upper end of the inner cavity 16 and the upper end of the outer cavity 17. The inner cavity 16, the oil passage, and the outer cavity 17 constitute an oil chamber filled with oil. The oil-blocking structure controls the opening and closing of the oil passage. An air chamber 18 is formed between the lower side of the sealing structure and the inner tube 12 and the cylinder 13.

[0041] like Figure 2 The upper outer edge 7 of the upper side fits with the inner wall of the cylinder body 13, and the lower outer edge 7 of the lower side fits with the inner wall of the cylinder body 13. The upper and lower outer edges 7 form two sealing surfaces on the inner wall of the cylinder body 13. The upper outer edge of the upper inner edge 6 fits with the outer wall of the inner tube 12, and the lower outer edge of the lower inner edge 6 fits with the outer wall of the inner tube 12. The upper and lower inner edges 6 form two sealing surfaces on the outer wall of the inner tube 12, thereby achieving oil-gas separation.

[0042] Initially, the controllable spring of this application closes the oil passage through the oil-blocking structure. At this time, the inner cavity 16 and the outer cavity 17 are disconnected. Due to the incompressible nature of the oil, the piston rod 15 and the piston 14 cannot move up and down, and the length of the controllable spring is locked. When the oil-blocking structure opens the oil passage, the oil can flow between the inner cavity 16 and the outer cavity 17 through the oil passage. The gas chamber 18 is filled with gas. When the piston rod 15 pushes the piston 14 downward, the oil in the inner cavity 16 flows to the outer cavity 17 through the oil passage, the volume of the inner cavity 16 decreases, the volume of the outer cavity 17 increases, the sealing structure moves downward, and the gas in the gas chamber 18 is compressed. Conversely, when the piston 14 and the piston rod 15 move upward, the oil in the outer cavity 17 is drawn into the inner cavity 16 through the oil passage, the sealing structure moves upward, and the gas in the gas chamber 18 expands.

[0043] As one implementation, the oil passage includes a first oil port 19 and a second oil port 20. The first oil port 19 vertically penetrates the piston 14, and one end of the second oil port 20 penetrates to the outer wall of the piston 14 and communicates with the upper end of the outer cavity 17. The other end of the second oil port 20 communicates with the first oil port 19.

[0044] The oil-blocking structure includes a pin 21 and a plug 22. The piston rod 15 has a mounting cavity 23 that extends through it vertically. The pin 21 is slidably connected in the mounting cavity 23. The upper end of the pin 21 protrudes from the upper end of the piston rod 15. The lower end of the pin 21 is connected to the plug 22. The plug 22 is located in the first oil port 19. The pin 21 drives the plug 22 to move up and down to open and close the first oil port 19.

[0045] With the above settings, the ejector pin 21 moves up and down, and the plug 22 controls the opening and closing of the first oil port 19.

[0046] A sealing ring is installed at the lower end of the first oil port 19 of this application to improve the sealing between the plug 22 and the first oil port 19, thereby improving the sealing effect of the plug 22. The outer diameter of the lower end of the plug 22 is larger than the outer diameter of the middle part. The plug 22 blocks the first oil port 19 with its lower end. The ejector pin 21 is pressed down, and the ejector pin 21 pushes the plug 22 downward. The lower end of the plug 22 protrudes under the piston 14, such as... Figure 3 Due to the narrowing of the middle section of the plug 22, the oil in the inner cavity 16 can flow to the outer cavity 17 through the first oil port 19, the second oil port 20, and the inner tube 12. Alternatively, the oil in the outer cavity 17 can flow into the inner cavity 16 through the inner tube 12, the second oil port 20, and the first oil port 19. The ejector pin 21 moves upward, causing the plug 22 to move upward. The lower end of the plug 22 then re-blocks the first oil port 19 to close the oil passage.

[0047] In one implementation, the cross-sectional area of ​​the inner cavity 16 is S1, and the cross-sectional area of ​​the outer cavity 17 is S2, 1.8 <S2 / S1<2.2。

[0048] The above settings reduce wear on the sealing structure and extend its lifespan.

[0049] When S2 / S1 = 2 in this application, when the piston rod 15 drives the piston 14 to move downward 2, the sealing structure moves downward 1, and the movement distance is smaller, thereby reducing the wear of the rubber ring 3 of the sealing structure.

[0050] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. An oil and gas separation seal structure, characterized by, It includes an integrally molded rubber ring, in which a metal ring is embedded, and annular grooves are provided on the upper and lower sides of the rubber ring along the circumferential direction. The rubber ring forms an inner sealing edge and an outer sealing edge on the inner and outer sides of the annular grooves, respectively. The rubber ring has an inner groove on its inner circumference. The upper edge of the inner groove extends to the upper end of the upper inner sealing edge, and the lower edge of the inner groove extends to the lower end of the lower inner sealing edge. The outer periphery of the rubber ring is provided with an outer groove, the upper edge of the outer groove extends to the upper end of the upper outer sealing edge, and the lower edge of the outer groove extends to the lower end of the lower outer sealing edge. The upper edges of both the inner and outer grooves are higher than the bottom of the upper annular groove, and the lower edges of both the inner and outer grooves are lower than the bottom of the lower annular groove.

2. A gas-oil separation seal structure according to claim 1, wherein The inner edge of the outer sealing edge, at the end furthest from the metal ring, has an inner chamfer, and the outer edge of the outer sealing edge, at the end furthest from the metal ring, has an outer chamfer.

3. A gas-oil separation seal structure according to claim 2, wherein One side of the inner chamfer extends to the inner groove, and the other side of the inner chamfer extends to the end face of the inner sealing edge. One side of the outer chamfer extends to the outer groove, and the other side of the outer chamfer extends to the end face of the outer sealing edge.

4. A gas-oil separation seal structure according to claim 3, wherein The radial distance between the inner and outer sides of the inner chamfer is d1, and the radial distance between the inner and outer sides of the outer chamfer is d2, where d2 > d1.

5. The oil and gas separation seal structure of claim 1, wherein, The metal ring has a square cross-section.

6. A controllable spring, characterized by The system includes the sealing structure described in claim 1, an inner tube, a cylinder, a piston, a piston rod, and an oil-blocking structure. The inner tube is vertically locked in the cylinder. The piston is slidably connected in the inner tube. An inner cavity is formed between the lower side of the piston and the inner tube. The piston rod vertically penetrates the upper end of the cylinder and is fixedly connected to the piston. The sealing structure is slidably connected between the inner tube and the cylinder. The inner sealing edge cooperates with the outer wall of the inner tube, and the outer sealing edge cooperates with the inner wall of the cylinder. An outer cavity is formed between the upper side of the sealing structure, the inner tube, and the cylinder. An oil passage is provided between the upper end of the inner cavity and the upper end of the outer cavity. The inner cavity, the oil passage, and the outer cavity constitute an oil chamber filled with oil. The oil-blocking structure controls the opening and closing of the oil passage. An air chamber is formed between the lower side of the sealing structure, the inner tube, and the cylinder.

7. A controllable spring according to claim 6, wherein The oil passage includes a first oil port and a second oil port. The first oil port vertically penetrates the piston, one end of the second oil port penetrates to the outer wall of the piston and communicates with the upper end of the outer cavity, and the other end of the second oil port communicates with the first oil port. The oil-blocking structure includes a push pin and a plug. The piston rod has a mounting cavity extending through it vertically. The push pin is slidably connected in the mounting cavity. The upper end of the push pin protrudes from the upper end of the piston rod. The lower end of the push pin is connected to the plug. The plug is located in the first oil port. The push pin drives the plug to move up and down to open and close the first oil port.

8. A controllable spring according to claim 6, wherein The cross-sectional area of ​​the inner cavity is S1, and the cross-sectional area of ​​the outer cavity is S2, 1.

8. <S2 / S1<2.2。

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