High-pressure oil seal with PTFE (Polytetrafluoroethylene) sheet adhered to framework

By using a structural design that combines PTFE sheets with a skeleton in the oil seal, the problem of poor sealing under high pressure is solved, achieving stable sealing and improved wear resistance under 3MPa pressure conditions, and extending service life.

CN223498694UActive Publication Date: 2025-10-31HAERBIN LIMIN RUBBER FACTORY
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Patent Information

Application Number
CN202423266820.3
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-12-27
Publication Date
2025-10-31
Estimated Expiration
2034-12-27

AI Technical Summary

Technical Problem

Existing oil seals cannot effectively seal under 3MPa pressure conditions, which easily leads to problems.

Method used

PTFE sheets are bonded to the skeleton, combined with the structural design of rubber and springs. The PTFE sheets fill the gaps in the skeleton and connect with the rubber and skeleton. Activated PTFE sheets are used to improve pressure resistance and wear resistance.

Benefits of technology

It achieves stable sealing under 3MPa pressure conditions, extends the service life of the oil seal, and improves wear resistance and high temperature resistance.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a high-pressure oil seal with a PTFE (Polytetrafluoroethylene) sheet adhered to a framework, and belongs to the technical field of oil seals. And the device can work under the working condition of the maximum pressure of 3MPa. The cross section of the framework is in an L shape, the rubber is divided into a wrapping part on the outer side and a sealing part on the inner side, the wrapping part covers the outer side of the framework, one end of the sealing part is connected with the corner of the framework and extends inwards, a gap is formed between the sealing part and one straight edge of the framework, the gap is filled with a PTFE sheet, and the spring is installed at the other end of the sealing part. According to the high-pressure oil seal, the structure of a traditional oil seal is changed, part of rubber making contact with the framework is changed into the PTFE thin sheet, the whole oil seal is more pressure-resistant and can work under the working condition of the maximum pressure of 3 MPa, meanwhile, the eccentric wear resistance and the high-temperature resistance of the oil seal can be improved by using the activated PTFE thin sheet, and the service life of the high-pressure oil seal is prolonged.
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Description

Technical Field

[0001] This utility model belongs to the field of oil seal technology, specifically relating to a high-pressure oil seal in which a PTFE sheet is bonded to a skeleton. Background Technology

[0002] Normal oil seals operate at 1MPa, but in practice they need to work at 3MPa. Current oil seals cannot meet the technical requirements for this condition, and are prone to problems such as failure to seal or failure to function during use. Utility Model Content

[0003] In order to solve the above problems, this utility model provides a high-pressure oil seal in which a PTFE sheet is bonded to a skeleton, which can work under a maximum pressure of 3MPa.

[0004] The technical solution adopted by this utility model is:

[0005] A high-pressure oil seal with a PTFE sheet bonded to a skeleton includes rubber, a skeleton, a spring, and a PTFE sheet. The skeleton has an L-shaped cross-section. The rubber is divided into an outer wrapping part and an inner sealing part. The wrapping part covers the outer side of the skeleton. One end of the sealing part is connected to a corner of the skeleton and extends inward, so that there is a gap between the sealing part and a straight edge of the skeleton. This gap is filled by the PTFE sheet. The spring is installed at the other end of the sealing part.

[0006] Compared with the prior art, the present invention has the following advantages:

[0007] This invention changes the structure of traditional oil seals by replacing some of the rubber in contact with the skeleton with PTFE sheets, making the overall oil seal more pressure resistant and able to work under a maximum pressure of 3MPa. At the same time, the use of activated PTFE sheets can also improve the oil seal's resistance to uneven wear and high temperature, and extend the service life of high-pressure oil seals. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the structure of this utility model;

[0009] Among them: 1. Rubber; 101. Wrapping part; 102. Sealing part; 2. Skeleton; 3. Spring; 4. PTFE sheet; 401. Extension part. Detailed Implementation

[0010] To better understand the purpose, structure, and function of this utility model, a more detailed description of this utility model will be provided below with reference to the accompanying drawings.

[0011] like Figure 1As shown, this utility model provides a high-pressure oil seal with a PTFE sheet bonded to a skeleton, including a rubber 1, a skeleton 2, a spring 3, and a PTFE sheet 4; the skeleton 2 has an L-shaped cross-section, the rubber 1 is divided into an outer wrapping part 101 and an inner sealing part 102, the wrapping part 101 covers the outer side of the skeleton 2, one end of the sealing part 102 is connected to the corner of the skeleton 2 and extends inward, so that there is a gap between the sealing part 102 and a straight edge of the skeleton 2, the gap is filled by the PTFE sheet 4, and the spring 3 is installed at the other end of the sealing part 102.

[0012] The PTFE sheet 4 has an extension 401 extending outward from the gap, and the PTFE sheet 4 is connected to the wrapping part 101, the sealing part 102 and the skeleton 2 of the rubber 1.

[0013] The PTFE sheet 4 is made of activated PTFE.

[0014] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.

Claims

1. A high-pressure oil seal with a PTFE sheet bonded to a skeleton, characterized in that: It includes rubber (1), skeleton (2), spring (3) and PTFE sheet (4); the skeleton (2) has an L-shaped cross section, the rubber (1) is divided into an outer wrapping part (101) and an inner sealing part (102), the wrapping part (101) covers the outside of the skeleton (2), one end of the sealing part (102) is connected to the corner of the skeleton (2) and extends inward, so that there is a gap between the sealing part (102) and a straight edge of the skeleton (2), the gap is filled by the PTFE sheet (4), and the spring (3) is installed at the other end of the sealing part (102).

2. The high-pressure oil seal with PTFE sheet bonded to a skeleton according to claim 1, characterized in that: The PTFE sheet (4) has an extension (401) extending outward from the gap, and the PTFE sheet (4) is connected to the wrapping part (101), sealing part (102) and skeleton (2) of the rubber (1).

3. The high-pressure oil seal with PTFE sheet bonded to a skeleton according to claim 1, characterized in that: The PTFE sheet (4) is made of activated PTFE.