WO2020207388A1

WO2020207388A1 - Non-revolving-body sealing lip rotary sealing structure

Info

Publication number: WO2020207388A1
Application number: PCT/CN2020/083609
Authority: WO
Inventors: 唐宇阳; 孙亚威
Original assignee: 深圳市魔技科技有限公司
Priority date: 2019-04-11
Filing date: 2020-04-08
Publication date: 2020-10-15
Also published as: CN109899523A

Abstract

Provided is a non-revolving-body sealing lip rotary sealing structure, comprising two adjacent parts (4, 5), wherein a sealing ring (2) is arranged between surfaces, in contact with each other, of the two parts (4, 5), at least one part rotates about an axis of rotation thereof relative to the other part, and the contour shape of the sealing ring (2) is configured to be a non-revolving body relative to the axis of rotation of the two parts (4, 5). The sealing structure has a long service life, a higher operation speed, a higher allowable average pressure and a higher allowable peak pressure, and a smaller moment of resistance and a smaller heating quantity.

Description

Non-rotating body sealing lip rotary sealing structure

[0001] This application is based on a Chinese patent application with an application number of 201910291035. 8, and an application date of April 11, 2019, and claims its priority. The entire content of this application is hereby incorporated into this application as a whole.

[0002] Technical Field

[0003] This application belongs to the technical field of sealing structures, and specifically relates to a non-rotating body sealing lip rotary sealing structure.

[0004] Background Technology

[0005] Rotary seal is a kind of dynamic seal. Rotary seal is composed of a sealing ring that provides a sealing effect and a friction surface (features such as journals, end surfaces) or a sealing ring, and is used to seal rods with rotating or swinging motion. There are related applications in various industrial fields such as construction machinery, construction machinery, and automotive equipment at shafts, pins, and rotary joints. It is a two-way rotating seal ring that can withstand the pressure on both sides or the alternating pressure. The existing rotary sealing mechanisms are all rotary body sealing structures, and their working pressure, life, operating speed, resistance torque, and heat generation cannot meet the requirements of some occasions.

[0006] Application content

[0007] The technical problem to be solved by this application is to provide a non-rotating body sealing lip rotary sealing structure in view of the above-mentioned defects of the prior art.

[0008] The technical solutions adopted by this application to solve its technical problems are:

[0009] A non-rotating body sealing lip rotary sealing structure is provided, which includes two adjacent parts with the same rotation axis, and a groove for embedding a sealing ring is provided on the surface of one of the parts in contact with the other part. The part with the sealing ring rotates relatively around the rotation axis, and the contour shape formed by the sealing ring being embedded in the groove is a non-rotating body with respect to the rotation axis of the two parts.

[0010] Preferably, the groove is provided on the end face of the part, and the sealing ring forms an end face seal for two adjacent parts.

[0011] Preferably, the groove is provided on the circumferential surface of the part, and the sealing ring forms a circumferential surface seal for two adjacent parts.

[0012] Preferably, the axis of the contour shape of the seal ring is parallel to the rotation axis of the two parts but does not overlap, that is, the sealing lip whose axis is the axis of rotation during the sealing operation is a non-rotating rotary sealing structure. [0013] Preferably, the sealing ring and the part provided with the groove are an integral structure.

[0014] This application also provides another technical solution: a non-rotating body sealing lip rotary seal structure, comprising two adjacent parts with the same rotation axis, the two parts rotate relative to each other, and the contact surfaces between the two parts It is filled with a sealing ring, and the contour shape of the sealing ring is a non-rotating body about the rotation axis of the two parts.

[0015] Preferably, the sealing ring is arranged on the end faces of two adjacent parts to form an end face seal for the two adjacent parts

[0016] Preferably, the sealing ring is arranged on the circumferential surface of two adjacent parts to form a circumferential surface seal for the two adjacent parts.

[0017] Preferably, the axis of the contour shape of the seal ring is parallel to the rotation axis of the two parts, but does not overlap. That is, the sealing lip whose axis is the axis of rotation during the sealing operation is a non-rotating rotary sealing structure.

[0018] The beneficial effects of the present application are: the sealing rings in the present application are all set as non-rotating bodies about the axis of rotation of the parts. Under the same conditions, the non-rotating body seal structure has a longer life and higher operating speed than the traditional rotating seal structure. The allowable average and peak pressures are increased, and the running resistance torque and heat generation are reduced.

[0019] BRIEF DESCRIPTION

[0020] In order to more clearly explain the embodiments of the present application or the technical solutions in the prior art, the present application will be further described with reference to the accompanying drawings and embodiments. The accompanying drawings in the following description are only part of the embodiments of the present application. For those of ordinary skill in the art, without creative work, other drawings can be obtained from these drawings:

[0021] FIG. 1 is a schematic structural view of a first embodiment of a non-rotating body sealing lip rotary seal structure of the present application; [0022] FIG. 2 is a schematic cross-sectional view of the first embodiment of the present application;

[0023] FIG. 3 is a schematic structural view of a second embodiment of a non-rotating body sealing lip rotary seal structure of the present application; [0024] FIG. 4 is a schematic cross-sectional view of a second embodiment of the present application.

[0025] FIG. 5 is a schematic structural view of a third embodiment of the non-rotating body sealing lip rotary seal structure of the present application; [0026] FIG. 6 is a schematic cross-sectional view of the third embodiment of the present application;

[0027] FIG. 7 is a schematic cross-sectional view of a fourth embodiment of the present application;

[0028] FIG. 8 is a schematic cross-sectional view of a fifth embodiment of the present application;

[0029] FIG. 9 is a schematic cross-sectional view of a sixth embodiment of the present application. [0030] Specific embodiments

[0031] In order to make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, a clear and complete description will be made below in conjunction with the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the implementation of the present application. Examples, not all examples. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present application.

[0032] Please refer to FIGS. 1 and 2. As the first embodiment of the present application, a non-rotating body sealing lip rotary sealing structure is provided, which includes two adjacent parts, one of the parts 4 and The surface of the other part 5 is provided with a groove 3 for the sealing ring 2 to be embedded. At least one part rotates relative to the other part around its rotation axis 1 and the sealing ring 2 is formed after being inserted into the groove 3 The contour shape is a non-rotating body about the rotation axis 1 of the two parts. The two parts are in contact with the end faces, the groove 3 is arranged on the end face of the part, and the sealing ring 2 forms an end face seal for two adjacent parts.

[0033] Please refer to FIGS. 3 and 4, as the second embodiment of the present application, the difference from the first embodiment is that the contact surface of the two parts is a circumferential surface, and the groove 3 is provided on the part The sealing ring 2 forms a circumferential surface seal to two adjacent parts.

[0034] Please refer to FIG. 5 and FIG. 6, as a third embodiment of the present application, the difference from the first embodiment is that the axis of the contour shape formed by the sealing ring 2 after being inserted into the groove 3 is The rotation axes 1 of the two parts are parallel but not coincident. The contour shape of the sealing ring 2 is a body of revolution about its own axis, but because the part surface is eccentrically arranged with respect to the rotation axis of the part, when the two parts rotate relative to each other, the sealing structure between the two parts is still a non-rotating body Rotating seal structure.

[0035] In the above embodiments, the parts without the sealing ring 2 can be replaced with any parts.

[0036] Please refer to FIG. 7, as the fourth embodiment of the present application, the difference from the first embodiment is that the sealing ring 2 can be directly filled between the contact surfaces of two adjacent parts. Similarly, Referring to Figures 8 and 9, the difference between the fifth embodiment of this application and the second embodiment and the difference between the sixth embodiment of this application and the third embodiment are that the sealing ring 2 can be directly Filling between the contact surfaces of two adjacent parts saves the cost of processing the groove 3 on the part.

[0037] In the third embodiment and the sixth embodiment, the sealing ring 2 can be any form of sealing ring. It can be understood that the material of the sealing ring 2 can be the same material as the parts. [0038] The seal ring in any of the above embodiments is a non-rotating body about the axis of rotation of the part. Under the same conditions, the non-rotating body seal structure has a longer life than the traditional rotating seal structure, the operating speed is increased, and the allowable average sum The peak pressure increases, and the running resistance torque and heat generation decrease.

[0039] It should be understood that for those of ordinary skill in the art, improvements or transformations can be made according to the above description, and all these improvements and transformations should fall within the protection scope of the appended claims of this application.

Summary of the invention

technical problem

The solution to the problem

The beneficial effects of the invention

Claims

[Claim 1] A non-rotating body sealing lip rotary seal structure, which is characterized in that it comprises two adjacent parts, wherein the surface of one of the parts in contact with the other part is provided with a groove for embedding the sealing ring, At least one part rotates relative to another part around its rotation axis, and the contour shape of the sealing lip formed after the sealing ring is embedded in the groove is a non-rotating body with respect to the rotation axis of the two parts.

[Claim 2] The non-rotating body sealing lip rotary seal structure according to claim 1, wherein the groove is provided on the end face of the part, and the sealing ring forms an end face seal to two adjacent parts.

[Claim 3] The non-rotating body sealing lip rotary seal structure according to claim 1, wherein the groove is provided on the circumferential surface of the part, and the sealing ring forms a circumferential surface seal to two adjacent parts. .

[Claim 4] The non-rotating body sealing lip rotary seal structure according to claim 1, wherein the axis of the contour shape formed by the sealing ring inserted into the groove is parallel to the rotation axis of the two parts but not coincide.

[Claim 5] The non-rotating body sealing lip rotary sealing structure according to any one of claims 1 to 4, characterized in that the sealing ring and the part provided with the groove are an integral structure.

[Claim 6] A non-rotating body sealing lip rotary seal structure, characterized in that it comprises two adjacent parts with the same rotation axis, the two parts rotate relative to each other, and a sealing ring is filled between the contact surfaces of the two parts , The contour shape of the sealing ring is a non-rotating body with respect to the rotation axis of the two parts.

[Claim 7] The non-rotating body sealing lip rotary seal structure according to claim 6, wherein the sealing ring is arranged on the end faces of two adjacent parts to form an end face seal for the two adjacent parts

[Claim 8] The non-rotating body sealing lip rotary seal structure of claim 6, wherein the sealing ring is arranged on the circumferential surface of two adjacent parts to form a circumferential surface seal to the adjacent two parts.

[Claim 9] The non-rotating body sealing lip rotary seal structure according to claim 6, characterized in that: The axis of the contour shape of the sealing ring is parallel to the rotation axis of the two parts but does not overlap