CN216618547U

CN216618547U - Liquid-gas sealing system

Info

Publication number: CN216618547U
Application number: CN202123041516.5U
Authority: CN
Inventors: 赵敏敏; 王勇; 黄乐; 韩璇璇; 石春明; 王文虎
Original assignee: Guangzhou Guoji Sealing Technology Co ltd; Northwest Institute Of Mechanical & Electrical Engineering; Guangzhou Mechanical Engineering Research Institute Co Ltd
Current assignee: Guangzhou Guoji Sealing Technology Co ltd; Northwest Institute Of Mechanical & Electrical Engineering; Guangzhou Mechanical Engineering Research Institute Co Ltd
Priority date: 2021-12-03
Filing date: 2021-12-03
Publication date: 2022-05-27
Anticipated expiration: 2031-12-03

Abstract

The utility model relates to the technical field of sealing systems, and discloses a liquid-gas sealing system, which comprises a stepped shaft, a sleeve and a cylinder barrel, wherein the stepped shaft is arranged on the stepped shaft; the sleeve is sleeved on the stepped shaft in a penetrating manner; the sleeve is sleeved in the cylinder barrel; a liquid cavity and a gas cavity are respectively arranged at two ends of the sleeve; the liquid cavity and the gas cavity are communicated with a gap between the sleeve and the stepped shaft through a flow guide channel; at least two sets of stepped seal assemblies distributed along the axial direction of the stepped shaft are arranged between the stepped shaft and the sleeve; and a second sealing element which is positioned between the adjacent stepped seal assemblies and used for sealing liquid and gas is also arranged between the stepped shaft and the sleeve. The liquid-gas two-seal sealing system provided by the utility model can avoid the phenomenon of mutual leakage of liquid and gas, prevent the power loss of equipment, overcome the problem of mutual leakage of oil and gas of the system under the original high-temperature, high-speed and high-pressure conditions, play a role in double sealing, and greatly improve the liquid-gas sealing effect of the liquid-gas two-seal sealing system.

Description

Liquid-gas sealing system

Technical Field

The utility model relates to the technical field of sealing systems, in particular to a liquid-gas sealing system.

Background

At present, the existing liquid-gas two-seal sealing system mostly uses one set of ladder seal between a ladder shaft and a sleeve as a sealing structure, but the liquid-gas two-seal sealing system is difficult to achieve a good sealing effect by arranging one set of ladder seal, so that the phenomenon of liquid and gas leakage exists, and the power loss of equipment is increased.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the problems in the prior art and provides a liquid-gas two-seal sealing system which has a double-sealing function and a good liquid-gas sealing effect.

In order to achieve the purpose, the utility model adopts the following scheme:

a liquid-gas two-seal sealing system comprises a stepped shaft, a sleeve and a cylinder barrel; the sleeve is sleeved on the stepped shaft in a penetrating manner; the sleeve is sleeved in the cylinder barrel; a liquid cavity and a gas cavity are respectively arranged at two ends of the sleeve; the liquid cavity and the gas cavity are communicated with a gap between the sleeve and the stepped shaft through a flow guide channel; at least two sets of stepped seal assemblies distributed along the axial direction of the stepped shaft are arranged between the stepped shaft and the sleeve; and a second sealing element which is positioned between the adjacent stepped seal assemblies and used for sealing liquid and gas is also arranged between the stepped shaft and the sleeve.

Furthermore, two sets of stepped seal assemblies are arranged between the stepped shaft and the sleeve; the inner side of the sleeve is provided with two first positioning grooves matched with the stepped seal assembly; and the inner ring of the sleeve is also provided with a second positioning groove which is positioned between the two first positioning grooves in the axial direction of the stepped shaft and is matched and installed with the second sealing element.

Further, the second sealing element comprises a triangular elastic sealing ring and two trapezoidal check rings; the triangular elastic sealing ring is positioned between the two trapezoidal check rings.

Furthermore, the triangular elastic sealing ring and the two trapezoidal check rings are distributed along the axial displacement of the stepped shaft.

Further, the second sealing element comprises a groove-shaped sealing ring, a star-shaped sealing ring and a first O-shaped sealing ring; the groove-shaped sealing ring is provided with a sealing groove matched with the star-shaped sealing ring; the star-shaped sealing ring is matched and embedded in the sealing groove; the first O-shaped sealing ring is sleeved on the outer ring of the groove-shaped sealing ring in a penetrating mode.

Further, the stepped seal assembly comprises a stepped seal ring and a second O-ring seal; the stepped sealing ring is sleeved in the inner ring of the second O-shaped sealing ring in a penetrating mode.

Further, the stepped seal rings each have an inclination angle; the inclination angle of a stepped sealing ring faces along one end direction of the stepped shaft; the inclination angle of the other stepped seal ring faces in the direction of the other end of the stepped shaft.

Further, a sealing gap is formed between the stepped shaft and the sleeve; the sealing gap is 0.05-0.15 mm.

Compared with the prior art, the utility model has the following advantages:

according to the utility model, at least two sets of stepped seal assemblies distributed along the axial direction of the stepped shaft are arranged between the stepped shaft and the sleeve, so that a good sealing effect is achieved on gas and liquid entering between the stepped shaft and the sleeve as a first seal, and a second seal member positioned between two adjacent sets of stepped seal assemblies is arranged between the stepped shaft and the sleeve to form a second seal, so that the phenomenon of mutual leakage of the liquid and the gas is avoided, the power loss of equipment is prevented, the problem of mutual oil-gas leakage of the system under the original high-temperature, high-speed and high-pressure conditions is solved, the double-seal effect is achieved, and the liquid-gas sealing effect of the liquid-gas double-seal system is greatly improved.

Drawings

The present application will be described in further detail with reference to the following drawings and detailed description.

Fig. 1 is a schematic cross-sectional view of a liquid-gas two-seal sealing system according to embodiment 1 of the present invention.

Fig. 2 is an enlarged view of a portion a shown in fig. 1.

Fig. 3 is a schematic cross-sectional view of a liquid-gas two-seal sealing system according to embodiment 2 of the present invention.

Fig. 4 is an enlarged view of a portion B shown in fig. 3.

The figure includes:

the sealing device comprises a stepped shaft 1, a sleeve 2, a first positioning groove 21, a second positioning groove 22, a cylinder barrel 3, a liquid cavity 4, a gas cavity 5, a flow guide channel 6, a stepped seal assembly 7, a stepped seal ring 71, an inclination angle 711, a second O-shaped seal ring 72, a second sealing element 8, a triangular elastic seal ring 81, a trapezoidal retainer ring 82, a groove-shaped seal ring 83, a seal groove 831, a star-shaped seal ring 84, a first O-shaped seal ring 85 and a seal gap 9.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the utility model but are not intended to limit the scope of the utility model.

Example 1:

as shown in fig. 1 to 2, a hydraulic-pneumatic two-seal sealing system includes a stepped shaft 1, a sleeve 2 and a cylinder 3; the sleeve 2 is sleeved on the stepped shaft 1 in a penetrating manner; the sleeve 2 is sleeved in the cylinder barrel 3; a liquid cavity 4 and a gas cavity 5 are respectively arranged at two ends of the sleeve 2; the liquid cavity 4 and the gas cavity 5 are communicated with a gap between the sleeve 2 and the stepped shaft 1 through a flow guide channel 6; at least two sets of stepped seal assemblies 7 distributed along the axial direction of the stepped shaft 1 are arranged between the stepped shaft 1 and the sleeve 2; and a second sealing element 8 which is positioned between the adjacent stepped seal assemblies 7 and used for sealing liquid and gas is also arranged between the stepped shaft 1 and the sleeve 2.

This liquid gas two seal system is through setting up at least two sets of ladder seal assembly 7 along the axial distribution of ladder axle 1 between ladder axle 1 and sleeve 2, gas and the liquid that gets into between ladder axle 1 and the sleeve 2 play good sealed effect, as first sealed, set up the second sealing member 8 that is located between two sets of adjacent ladder seal assembly 7 again between ladder axle 1 and sleeve 2, form the second and seal, avoid liquid and gas to take place the phenomenon of leaking mutually, prevent the power loss of equipment, the problem of the mutual hourglass of liquid gas two seal system oil gas under original high temperature high speed high pressure condition has been overcome, play the effect of double containment, the liquid gas seal effect of this liquid gas two seal system has been improved greatly.

Two sets of stepped seal assemblies 7 are arranged between the stepped shaft 1 and the sleeve 2; the inner side of the sleeve 2 is provided with two first positioning grooves 21 which are matched with the stepped seal component 7; the inner ring of the sleeve 2 is further provided with a second positioning groove 22 which is positioned between the two first positioning grooves 21 in the axial direction of the stepped shaft 1 and is matched with the second sealing element 8 for installation. The ladder seal assembly 7 and the second sealing element 8 can be positioned and installed by arranging the first positioning groove 21 and the second positioning groove 22, and the stability is good.

In this embodiment, the second sealing element 8 comprises a triangular elastic sealing ring 81 and two trapezoidal retaining rings 82; the triangular elastic sealing ring 81 is positioned between the two trapezoidal retaining rings 82. Preferably, the triangular elastic sealing ring 81 and the two trapezoidal retaining rings 82 are distributed along the axial direction of the stepped shaft 1.

In this embodiment, the stepped seal assembly 7 includes a stepped seal ring 71 and a second O-ring 72; the stepped sealing ring 71 is sleeved in the inner ring of the second O-shaped sealing ring 72. Wherein, the stepped sealing ring 71 and the second O-ring 72 are both fitted and embedded in the first positioning groove 21. The combination of the stepped sealing ring 71 and the second O-ring 72 forms a stable and durable stepped sealing assembly 7 as a first seal.

Preferably, the stepped seal rings 71 each have an inclination angle 711; the inclination 711 of one stepped seal ring 71 is directed along one end of the stepped shaft 1; the inclination 711 of the other stepped seal ring 71 is directed along the other end of the stepped shaft 1.

In order to realize sealing under high pressure, a sealing gap 9 is arranged between the stepped shaft 1 and the sleeve 2; the sealing gap 9 is 0.05-0.15 mm. Preferably, the clearance between the stepped shaft 1 and the sleeve 2 is 0.1 mm.

Example 2:

in this embodiment, as shown in fig. 3 and 4, the liquid-gas two-seal sealing system of this embodiment 2 is substantially the same as that of embodiment 1, except that the second sealing element 8 includes a groove-shaped sealing ring 83, a star-shaped sealing ring 84 and a first O-ring 85; the groove-shaped sealing ring 83 is provided with a sealing groove 831 matched with the star-shaped sealing ring 84; the star-shaped sealing ring 84 is embedded in the sealing groove 831 in a matching manner; the first O-ring 85 is sleeved on the outer ring of the groove-shaped sealing ring 83. Through matching star seal ring 84 and establishing at the seal groove 831 of cell type sealing ring 83, combined the two advantage of cell type sealing ring 83 and star seal ring 84, combine together with first O shape sealing washer 85 again and form a long-life, highly reliable structure, seal as the second way, combine together with first way is sealed, under the high temperature high speed high pressure condition, can solve the mutual problem that leaks of this liquid gas two seal system oil gas, play the effect of double containment, improved the liquid gas sealed effect of this liquid gas two seal system greatly.

To sum up, the embodiment of the utility model provides a liquid-gas two-seal sealing system, wherein at least two sets of stepped seal assemblies 7 distributed along the axial direction of a stepped shaft 1 are arranged between the stepped shaft 1 and a sleeve 2, so that a good sealing effect is achieved on gas and liquid entering between the stepped shaft 1 and the sleeve 2 and used as a first seal, and a second seal 8 located between two adjacent sets of stepped seal assemblies 7 is arranged between the stepped shaft 1 and the sleeve 2 to form a second seal, so that the phenomenon of mutual leakage of liquid and gas is avoided, the power loss of equipment is prevented, the problem of mutual leakage of oil and gas of the original liquid-gas two-seal sealing system under the conditions of high temperature, high speed and high pressure is solved, a double-seal effect is achieved, and the liquid-gas sealing effect of the liquid-gas two-seal sealing system is greatly improved.

The foregoing is only a preferred embodiment of the present application, and it should be noted that, for those skilled in the art, several modifications and substitutions can be made without departing from the technical principle of the present application, and these modifications and substitutions should also be regarded as the protection scope of the present application.

Claims

1. A liquid-gas two-seal sealing system comprises a stepped shaft, a sleeve and a cylinder barrel; the sleeve is sleeved on the stepped shaft in a penetrating manner; the sleeve is sleeved in the cylinder barrel; a liquid cavity and a gas cavity are respectively arranged at two ends of the sleeve; the liquid cavity and the gas cavity are communicated with a gap between the sleeve and the stepped shaft through a flow guide channel; the stepped shaft seal structure is characterized in that at least two sets of stepped seal assemblies distributed along the axial direction of the stepped shaft are arranged between the stepped shaft and the sleeve; and a second sealing element which is positioned between the adjacent stepped seal assemblies and used for sealing liquid and gas is also arranged between the stepped shaft and the sleeve.

2. The liquid-gas seal system according to claim 1, wherein two sets of stepped seal assemblies are provided between the stepped shaft and the sleeve; the inner side of the sleeve is provided with two first positioning grooves matched with the stepped seal assembly; and the inner ring of the sleeve is also provided with a second positioning groove which is positioned between the two first positioning grooves in the axial direction of the stepped shaft and is matched and installed with the second sealing element.

3. The system according to claim 1, wherein the second sealing element comprises a triangular elastomeric seal ring and two trapezoidal retainer rings; the triangular elastic sealing ring is positioned between the two trapezoidal check rings.

4. The hydro-pneumatic sealing system as defined in claim 3 wherein the triangular elastomeric seal ring and the two trapezoidal retainer rings are axially aligned along the stepped shaft.

5. The liquid-gas seal system of claim 1, wherein the second seal comprises a groove seal ring, a star seal ring, and a first O-ring seal ring; the groove-shaped sealing ring is provided with a sealing groove matched with the star-shaped sealing ring; the star-shaped sealing ring is matched and embedded in the sealing groove; the first O-shaped sealing ring is sleeved on the outer ring of the groove-shaped sealing ring in a penetrating mode.

6. The liquid-gas seal system of claim 2 wherein the stepped seal assembly comprises a stepped seal ring and a second O-ring seal; the stepped sealing ring is sleeved in the inner ring of the second O-shaped sealing ring in a penetrating mode.

7. The hydro-pneumatic two seal system of claim 6 wherein the stepped seal rings each have an inclination; the inclination angle of a stepped sealing ring faces along one end direction of the stepped shaft; the inclination angle of the other stepped seal ring faces in the direction of the other end of the stepped shaft.

8. The hydro-pneumatic seal system as defined in claim 1 wherein the stepped shaft and sleeve have a seal gap therebetween; the sealing gap is 0.05-0.15 mm.