Sealing ring with high-pressure sealing lip structure

Abstract

The utility model relates to a sealing ring with a high-pressure sealing lip structure, the section of the sealing ring is in a slender X shape, the ratio of the height to the width of the sealing ring is larger than or equal to 2, the sealing ring comprises an upper sealing lip and a lower sealing lip, the lower sealing lip comprises a lower outer lip opening and a lower inner lip opening, the lower outer lip opening extends towards the outer side in an inclined mode, and the lower inner lip opening extends towards the inner side in an inclined mode. The section of the lower sealing lip is in an inverted-V shape, the lower sealing lip is installed in an installation groove of a gear shifting mechanism shell, the lower sealing lip is in interference fit with the groove wall of the installation groove, the upper sealing lip is in a V shape and comprises an upper outer lip opening and an upper inner lip opening, the structure of the upper sealing lip is symmetrical to that of the lower sealing lip, and the upper portion of the upper sealing lip is in interference fit with the plane of an air cylinder air inlet channel. And the side surface of the upper sealing lip is in interference fit with the mounting groove. By the adoption of the technical scheme, the sealing ring is affected by interference of the upper sealing lip structure, the lower sealing lip structure and the groove, the effect that the sealing ring does not fall off after being reversely arranged can be achieved, and the sealing effect of the sealing ring in the high-pressure environment can be effectively guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of gearbox cylinder sealing rings, in particular to a sealing ring with a high-pressure sealing lip structure. Background Art

[0002] The gearbox cylinder seal ring (hereinafter referred to as the seal ring) is a seal ring placed between the shift mechanism and the cylinder intake channel joint surface. Its function is to prevent high-pressure gas from leaking out from the shift mechanism and the cylinder intake channel joint surface. When the seal ring fails, it will directly affect the performance and normal operation of the gearbox. The seal ring is made of rubber material to block the medium of the penetration channel between the gearbox shift mechanism and the cylinder intake channel joint surface. When the seal ring is subjected to the contact pressure of the shift mechanism and the cylinder intake channel joint surface, it will produce elastic deformation and elastic recovery force, reduce the unevenness and roughness of the parts mating surface, increase the flow resistance of the medium, and then cut off the penetration channel of the working medium to achieve a sealing effect.

[0003] Due to limitations such as the machine structure, the internal pressure of the gearbox structure is relatively high, and traditional ordinary sealing rings cannot withstand the internal pressure, causing the seal to fail easily; at the same time, during the installation process, the sealing ring is easy to fall out of the installation groove of the shift mechanism. Summary of the invention

[0004] The utility model aims to provide a sealing ring with a high-pressure sealing lip structure, aiming to solve the problems of sealing failure of the sealing ring due to high internal pressure of the gearbox and easy detachment from the installation groove of the shift mechanism.

[0005] The technical solution adopted by the utility model is: a sealing ring with a high-pressure sealing lip structure, the cross-sectional shape of the sealing ring is an elongated "X" shape, the height and width ratio of the sealing ring is ≥2, the sealing ring comprises an upper sealing lip and a lower sealing lip, the lower sealing lip comprises a lower outer lip opening and a lower inner lip opening, the lower outer lip opening extends obliquely outward, and the lower inner lip opening extends obliquely inward, so that the cross-section of the lower sealing lip is an inverted "V" shape and is installed in the mounting groove of the shift mechanism housing, the lower sealing lip is interference fit with the groove wall of the mounting groove, the upper sealing lip is "V"-shaped, comprises an upper outer lip opening and an upper inner lip opening, the structure of the upper sealing lip is symmetrical with the structure of the lower sealing lip, and when the cylinder intake channel plane is installed on the mounting groove, the upper sealing lip is compressed into the groove, so that the upper part of the upper sealing lip is interference fit with the cylinder intake channel plane, and the side surface of the upper sealing lip is interference fit with the mounting groove.

[0006] A further technical solution of the utility model is that the ends of the upper outer lip, the upper inner lip, the lower outer lip and the lower inner lip are in the shape of arc protrusions.

[0007] A further technical solution of the utility model is that two sides of the middle of the sealing ring are concave, and the depth of the concave is 0.3mm to 2mm.

[0008] A further technical solution of the utility model is: the lower outer lip and the lower inner lip form an inverted "V"-shaped groove, the upper outer lip and the upper inner lip form a "V"-shaped groove, and the depth of the inverted "V"-shaped and "V"-shaped grooves is 0.2mm to 1mm.

[0009] The beneficial effect of the utility model is that: due to the adoption of the above technical scheme, the utility model is a sealing ring with a high-pressure sealing lip structure: the sealing ring is affected by the upper and lower double sealing lip structures and the interference fit of the groove, which can achieve the effect of the sealing ring not falling off when inverted, and can effectively ensure the sealing effect of the sealing ring in a high-pressure environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a cross-sectional view of a sealing ring with a high-pressure sealing lip structure described in the utility model;

[0011] Figure 2 It is a schematic diagram of a sealing ring with a high-pressure sealing lip structure described in the utility model being arranged between a shift mechanism and a plane of a cylinder air intake passage. DETAILED DESCRIPTION

[0012] The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0013] Example:

[0014] like Figure 1 , 2 A sealing ring with a high-pressure sealing lip structure is shown, the cross-sectional shape of the sealing ring 1 is an elongated "X" shape, the height to width ratio of the sealing ring is ≥2, the sealing ring includes an upper sealing lip 2 and a lower sealing lip 3, the lower sealing lip includes a lower outer lip opening 31 and a lower inner lip opening 32, the lower outer lip opening extends obliquely outward, and the lower inner lip opening extends obliquely inward, so that the cross-section of the lower sealing lip is an inverted "V" shape and is installed in the mounting groove of the shift mechanism housing, the lower sealing lip has an interference fit with the groove wall of the mounting groove, the upper sealing lip is "V"-shaped, including an upper outer lip opening 21 and an upper inner lip opening 22, the structure of the upper sealing lip is symmetrical with the structure of the lower sealing lip, and when the cylinder intake channel plane 5 is installed on the mounting groove, the upper sealing lip is compressed into the groove, so that the upper part of the upper sealing lip has an interference fit with the cylinder intake channel plane, and the side of the upper sealing lip has an interference fit with the mounting groove.

[0015] Furthermore, the ends of the upper outer lip, the upper inner lip, the lower outer lip and the lower inner lip are in the shape of arc protrusions.

[0016] Furthermore, the middle of the sealing ring is concave on both sides, and the depth of the concave is 0.3mm to 2mm.

[0017] Furthermore, the lower outer lip and the lower inner lip form an inverted "V"-shaped groove, and the upper outer lip and the upper inner lip form a "V"-shaped groove, and the depth of the inverted "V"-shaped and "V"-shaped grooves is 0.2mm to 1mm.

[0018] In this technical solution, the upper and lower double sealing lip structures are used to cooperate with the shift mechanism housing plane 4 and the cylinder gas channel plane 5 to play a sealing role. When the sealing ring is installed on the shift mechanism housing plane, the sealing ring body and the shift mechanism housing plane are in interference, which prevents the sealing ring from falling out during installation. At the same time, it plays a limiting role on the sealing ring under high pressure environment, thereby improving the sealing effect.

[0019] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A sealing ring with a high-pressure sealing lip structure, characterized in that: The cross-sectional shape of the sealing ring is an elongated "X" shape, and the ratio of the height to the width of the sealing ring is ≥2. The sealing ring includes an upper sealing lip and a lower sealing lip, and the lower sealing lip includes a lower outer lip opening and a lower inner lip opening. The lower outer lip opening extends obliquely outward, and the lower inner lip opening extends obliquely inward, so that the cross-sectional shape of the lower sealing lip is an inverted "V" shape and is installed in the mounting groove of the shift mechanism housing. The lower sealing lip has an interference fit with the groove wall of the mounting groove. The upper sealing lip is "V"-shaped and includes an upper outer lip opening and an upper inner lip opening. The structure of the upper sealing lip is symmetrical with that of the lower sealing lip. When the cylinder intake channel plane is installed on the mounting groove, the upper sealing lip is compressed into the groove, so that the upper part of the upper sealing lip has an interference fit with the cylinder intake channel plane, and the side surface of the upper sealing lip has an interference fit with the mounting groove.

2. The sealing ring with a high-pressure sealing lip structure according to claim 1, characterized in that: The ends of the upper outer lip, the upper inner lip, the lower outer lip and the lower inner lip are in arc-shaped protrusions.

3. The sealing ring with a high-pressure sealing lip structure according to claim 1, characterized in that: The middle part of the sealing ring is concave on both sides, and the depth of the concave is 0.3mm to 2mm.

4. The sealing ring with a high-pressure sealing lip structure according to claim 1, characterized in that: The lower outer lip and the lower inner lip form an inverted "V"-shaped groove, and the upper outer lip and the upper inner lip form a "V"-shaped groove. The depth of the inverted "V"-shaped and "V"-shaped grooves is 0.2mm to 1mm.

Images