CN214837430U

CN214837430U - Sealing structure of piston type energy accumulator

Info

Publication number: CN214837430U
Application number: CN202120711469.1U
Authority: CN
Inventors: 唐建; 王洪; 张丽晓; 亓鑫; 张彦超
Original assignee: Xiwei Intelligent Control Technology Xianghe Co ltd
Current assignee: Xiwei Intelligent Control Technology Xianghe Co ltd
Priority date: 2021-04-08
Filing date: 2021-04-08
Publication date: 2021-11-23
Anticipated expiration: 2031-04-08

Abstract

The application provides a sealing structure of a piston type energy accumulator, which comprises a first sealing part and a second sealing part; the first sealing part and the second sealing part respectively comprise an O-shaped ring and a check ring; the cylinder barrel comprises a working section barrel body and first connecting section barrel bodies at two ends of the working section barrel body, and threads are arranged on the inner wall of each first connecting section barrel body; the end cover is including stretching into the section body and the second linkage segment body, the screw thread is established to the second linkage segment body lateral wall, the lateral wall that stretches into the section body is equipped with first draw-in groove and second draw-in groove respectively, first sealing joint is in first draw-in groove, the second sealing joint is in the second draw-in groove, the tip that the end cover inserted the cylinder makes the second linkage segment body and first linkage segment barrel threaded connection, and make the outward flange of first sealing and second sealing and the inner wall butt contact of working section barrel. The beneficial effect of this application is: the double-layer sealing structure formed by the first sealing part and the second sealing part is arranged between the end cover and the cylinder barrel, so that the sealing property, the sealing service life and the safety between the cylinder barrel and the end cover are improved.

Description

Sealing structure of piston type energy accumulator

Technical Field

The disclosure relates to the technical field of piston type energy accumulators, in particular to a sealing structure of a piston type energy accumulator.

Background

The piston type energy accumulator is made up by connecting cylinder barrel and end covers at two sides through screw thread, the common working medium is nitrogen and hydraulic oil, and the piston separates the gas side and oil side of the energy accumulator. Because the working pressure of the piston type energy accumulator is usually higher, the piston type energy accumulator belongs to a high-pressure container, and the situation that the sealing position leaks can occur after the piston type energy accumulator is used for a certain time under high working pressure, so that certain safety risk is caused, and a sealing structure needs to be added at the connecting position of the cylinder barrel and the end cover.

Disclosure of Invention

The purpose of this application is to provide a seal structure of piston accumulator to above problem.

In a first aspect, the application provides a sealing structure of a piston type energy accumulator, the piston type energy accumulator comprises a cylinder barrel and a pair of end covers, the pair of end covers are respectively in threaded connection with two ends of the cylinder barrel, and the sealing structure comprises a first sealing part and a second sealing part; the first sealing part comprises a first O-shaped ring and a first check ring, and the second sealing part comprises a second O-shaped ring and a second check ring; the cylinder barrel comprises a working section barrel body and first connecting section barrel bodies arranged on two sides of the working section barrel body, two end parts of the cylinder barrel corresponding to the end covers extend inwards the cylinder barrel for a set length to form the first connecting section barrel bodies, and threads are arranged on the inner wall of each first connecting section barrel body; the end cover comprises a stretching section body and a second connecting section body, threads are arranged on the side wall of the second connecting section body, a first clamping groove and a second clamping groove are respectively formed in the side wall of the stretching section body, the first clamping groove and the second clamping groove are arranged along the axial direction of the stretching section body, the first sealing portion is connected in the first clamping groove in a clamped mode, the second sealing portion is connected in the second clamping groove in a clamped mode, the end cover is inserted into the end portion of the cylinder barrel, so that the stretching section body stretches into the working section cylinder body, the second connecting section body is in threaded connection with the first connecting section cylinder body, and the outer edges of the first sealing portion and the second sealing portion are in butt contact with the inner wall of the working section cylinder body.

According to the technical scheme provided by the embodiment of the application, the inner diameter of the working section cylinder is smaller than that of the first connecting section cylinder; the diameter of the extending section body is smaller than that of the second connecting section body.

According to the technical scheme provided by the embodiment of the application, the second clamping groove is arranged in the region, located between the first clamping groove and the second connecting section body, of the extending section body; the groove depths of the first clamping groove and the second clamping groove are consistent, and the thickness of the second sealing portion is larger than that of the first sealing portion, so that the outer edge of the second sealing portion clamped in the second clamping groove protrudes out of the outer edge of the first sealing portion clamped in the first clamping groove.

According to the technical scheme provided by the embodiment of the application, elastic sealing gaskets are respectively attached to the inner walls of the first clamping groove and the second clamping groove.

According to the technical scheme provided by the embodiment of the application, the surface of the sealing gasket, which is far away from the inner wall of the groove, is provided with the raised grid net.

The invention has the beneficial effects that: the application provides a piston accumulator's seal structure, on threaded connection's basis between end cover and cylinder, the double-deck seal structure of first sealing and second sealing constitution is still set up in the threaded connection department of cylinder and both sides end cover, when a sealing takes place to age or receive to destroy and take place little seepage, another sealing plays a role, gas or the hydraulic oil sealing of little seepage is in another sealing department outside the sealing of damage, the leakproofness between cylinder and the end cover has been improved, sealing life and security. In addition, all set up first sealing and second sealing to be by O type circle and retaining ring superimposed structure, can assist the O type circle to reach better sealed effect, prevent simultaneously that the O type circle from being crowded into the gap after warping in to improve the life of O type circle.

Drawings

Fig. 1 is a schematic structural diagram of an accumulator sealing structure provided in an embodiment of the present application;

fig. 2 is a schematic structural diagram of a first sealing portion and a second sealing portion in an accumulator sealing structure provided in an embodiment of the present application;

fig. 3 is a schematic structural diagram of an end cap in an accumulator sealing structure provided in an embodiment of the present application;

fig. 4 is a schematic structural diagram of a sealing gasket in an accumulator sealing structure provided in an embodiment of the present application;

the text labels in the figures are represented as: 1. an end cap; 2. a second seal portion; 3. a first seal portion; 4. a working section cylinder; 5. a cylinder barrel; 6. a first connecting section cylinder; 7. extending into the segment body; 8. a second connecting segment body; 9. a first card slot; 10. a second card slot; 11. sealing gaskets; 12. a raised grid net; 13. a first O-ring; 14. a first retainer ring; 15. a second O-ring; 16. and a second retainer ring.

Detailed Description

In order that those skilled in the art will better understand the technical solutions of the present invention, the following detailed description of the present invention is provided in conjunction with the accompanying drawings, and the description of the present section is only exemplary and explanatory, and should not be construed as limiting the scope of the present invention in any way.

As shown in fig. 1, which is a schematic view of a first embodiment of the present application, the piston accumulator includes a cylinder 5 and a pair of end caps 1, the pair of end caps 1 are respectively screwed to two ends of the cylinder 5, and the sealing structure includes a first sealing portion 3 and a second sealing portion 2. As shown in fig. 2, the first seal portion 3 includes a first O-ring 13 and a first retainer ring 14, and the second seal portion 2 includes a second O-ring 15 and a second retainer ring 16.

The cylinder barrel 5 comprises a working section barrel 4 and first connecting section barrels 6 arranged on two sides of the working section barrel 4, two end parts, corresponding to the end covers 1, of the cylinder barrel 5 extend into the cylinder barrel 5 for a set length to form the first connecting section barrels 6, and threads are arranged on the inner wall of the first connecting section barrels 6; the end cover 1 comprises a stretching section body 7 and a second connecting section body 8, threads are arranged on the side wall of the second connecting section body 8, a first clamping groove 9 and a second clamping groove 10 are respectively arranged on the side wall of the stretching section body 7, the first clamping groove 9 and the second clamping groove 10 are arranged along the axial direction of the stretching section body 7, a first sealing portion 3 is clamped in the first clamping groove 9, a second sealing portion 2 is clamped in the second clamping groove 10, the end cover 1 is inserted into the end portion of the cylinder 5 to enable the stretching section body 7 to stretch into the working section cylinder body 4, the second connecting section body 8 is in threaded connection with the first connecting section cylinder body 6, and the outer edges of the first sealing portion 3 and the second sealing portion 2 are in butt contact with the inner wall of the working section cylinder body 4.

In this embodiment, the first connecting section cylinder 6 at the two ends of the cylinder 5 is respectively in threaded connection with the second connecting section 8 of the end cover 1, and the corresponding extending section 7 of the end cover 1 extends into the working section cylinder 4 of the cylinder 5. For the leakproofness that improves energy storage ware cylinder 5, set up round first draw-in groove 9 and round second draw-in groove 10 on stretching into the section body 7 respectively, the first sealing of joint 3 in first draw-in groove 9, joint second sealing 2 in second draw-in groove 10 simultaneously to make the outward flange of the first sealing after the joint 3 and the outward flange of second sealing 2 realize the sealed of working section barrel 4 with the inner wall butt of working section barrel 4 respectively.

Set up first sealing 3 and 2 twice seal structure of second sealing, when a sealing takes place ageing or receives to destroy and take place little seepage, another sealing plays a role, seals the other sealing department outside the sealing of little seepage gas or hydraulic oil, has improved leakproofness, sealed life and the security between cylinder 5 and end cover 1. In addition, all set up first sealing and second sealing to be by O type circle and retaining ring superimposed structure, can assist the O type circle to reach better sealed effect, prevent simultaneously that the O type circle from being crowded into the gap after warping in to improve the life of O type circle.

In a preferred embodiment, as shown in fig. 3, the working section cylinder 4 has an inner diameter smaller than the inner diameter of the first connecting section cylinder 6; the diameter of the extending section body 7 is smaller than that of the second connecting section body 8.

In the preferred embodiment, the inside of the cylinder 5 is set to be a stepped structure in which the inner diameter of the middle working section cylinder 4 is smaller than the inner diameters of the first connecting section cylinders 6 at the two ends of the middle working section cylinder, and the end cover 1 is also set to be a stepped structure in order to be matched with the cylinder 5, so that when the two ends of the cylinder 5 are connected with the end cover 1, the stepped connecting structure is more favorable for the sealing property in the cylinder 5 compared with the directly connected connecting structure.

In a preferred embodiment, as shown in fig. 3, the second locking slot 10 is disposed in the region of the extending section 7 between the first locking slot 9 and the second connecting section 8; the groove depths of the first clamping groove 9 and the second clamping groove 10 are consistent, and the thickness of the second sealing part 2 is larger than that of the first sealing part 3, so that the outer edge of the second sealing part 2 clamped in the second clamping groove 10 protrudes out of the outer edge of the first sealing part 3 clamped in the first clamping groove 9.

In the preferred embodiment, the first clamping groove 9 and the second clamping groove 10 have the same structure, the first clamping groove 9 is arranged on one side close to the working section cylinder 4 compared with the second clamping groove 10, and the thickness of the second sealing part 2 is greater than that of the first sealing part 3, so that the first sealing part 3 clamped in the first clamping groove 9 is taken as a primary sealing structure, and the sealing part clamped in the second clamping groove 10 is taken as a secondary sealing structure, because the thickness of the second sealing part 2 is greater, the second sealing part 2 is compressed to deform more when in butt contact with the inner wall of the working section cylinder 4, and has better sealing performance, when the first sealing part 3 ages, the second sealing part 2 is on the basis of the same aging amount, because the thickness of the second sealing part 2 is greater, the contact sealing performance of the second sealing part 2 with the inner wall of the working section cylinder 4 is better, and the sealing performance between the cylinder 5 and the end cover 1 is improved, Seal life and safety.

In a preferred embodiment, as shown in fig. 3, elastic sealing gaskets 11 are respectively attached to the inner walls of the first slot 9 and the second slot 10. In the preferred embodiment, the elastic sealing gaskets 11 are respectively arranged on the inner walls of the first clamping groove 9 and the second clamping groove 10, and then the first sealing part 3 and the second sealing part 2 are respectively clamped in the first clamping groove 9 and the second clamping groove 10, so that the side surfaces of the first sealing part 3 and the second sealing part 2 are respectively in abutting contact with the surface of the sealing gasket 11, and therefore when the first sealing part 3 or the second sealing part 2 slightly ages and has reduced elasticity, the sealing gasket 11 can play a role in sealing compensation, and the sealing performance of the connection of the cylinder 5 is improved.

In the above preferred embodiment, preferably, as shown in fig. 4, the surface of the sealing gasket 11 away from the inner wall of the groove is provided with a raised grid mesh 12. The raised grid net is arranged on the surface of the sealing gasket 11 which plays a role of sealing performance compensation, and the sealing performance compensation can be further carried out when the sealing gasket 11 is contacted with the first sealing part 3 or the second sealing part 2.

The principles and embodiments of the present application are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts of the present application. The foregoing is only a preferred embodiment of the present application, and it should be noted that there are objectively infinite specific structures due to the limited character expressions, and it will be apparent to those skilled in the art that a plurality of modifications, decorations or changes may be made without departing from the principle of the present application, and the technical features described above may be combined in a suitable manner; such modifications, variations, combinations, or adaptations of the invention using its spirit and scope, as defined by the claims, may be directed to other uses and embodiments, or may be learned by practice of the invention.

Claims

1. A sealing structure of a piston type energy accumulator comprises a cylinder barrel and a pair of end covers, wherein the pair of end covers are respectively in threaded connection with two ends of the cylinder barrel; the first sealing part comprises a first O-shaped ring and a first check ring, and the second sealing part comprises a second O-shaped ring and a second check ring;

the cylinder barrel comprises a working section barrel body and first connecting section barrel bodies arranged on two sides of the working section barrel body, two end parts of the cylinder barrel corresponding to the end covers extend inwards the cylinder barrel for a set length to form the first connecting section barrel bodies, and threads are arranged on the inner wall of each first connecting section barrel body;

the end cover comprises a stretching section body and a second connecting section body, threads are arranged on the side wall of the second connecting section body, a first clamping groove and a second clamping groove are respectively formed in the side wall of the stretching section body, the first clamping groove and the second clamping groove are arranged along the axial direction of the stretching section body, the first sealing portion is connected in the first clamping groove in a clamped mode, the second sealing portion is connected in the second clamping groove in a clamped mode, the end cover is inserted into the end portion of the cylinder barrel, so that the stretching section body stretches into the working section cylinder body, the second connecting section body is in threaded connection with the first connecting section cylinder body, and the outer edges of the first sealing portion and the second sealing portion are in butt contact with the inner wall of the working section cylinder body.

2. A sealing structure of a piston accumulator according to claim 1, characterized in that the inner diameter of the working section cylinder is smaller than the inner diameter of the first connecting section cylinder; the diameter of the extending section body is smaller than that of the second connecting section body.

3. A sealing arrangement of the piston accumulator according to claim 2, characterised in that the second clamping groove is provided in the region of the run-in section between the first clamping groove and the second connecting section; the groove depths of the first clamping groove and the second clamping groove are consistent, and the thickness of the second sealing portion is larger than that of the first sealing portion, so that the outer edge of the second sealing portion clamped in the second clamping groove protrudes out of the outer edge of the first sealing portion clamped in the first clamping groove.

4. A sealing structure of a piston accumulator according to any one of claims 1 to 3, wherein elastic sealing gaskets are respectively attached to the inner walls of the first and second clamping grooves.

5. A seal arrangement of a piston accumulator according to claim 4, characterised in that the surface of the gasket facing away from the inner wall of the cell is provided with a raised grid mesh.