Elastic structure polytetrafluoroethylene oil seal

A technology of polytetrafluoroethylene and elastic structure, which is applied in the direction of engine sealing, engine components, mechanical equipment, etc., can solve the problems of creep elasticity and poor static sealing performance, and achieve the effect of improving dynamic sealing performance

Inactive Publication Date: 2012-04-18
BEIJING RES & DESIGN INST OF RUBBER IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The purpose of the present invention is to address the deficiencies in the prior art and to overcome the problems of creep and poor elasticity of polytetrafluoroethylene materials by adopting measures from two aspects of material

Method used

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  • Elastic structure polytetrafluoroethylene oil seal
  • Elastic structure polytetrafluoroethylene oil seal
  • Elastic structure polytetrafluoroethylene oil seal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0021] The design reference standard of the oil seal frame (1, 2) is GB / T9877.3-1988 ("Rotary Shaft Lip Seal Ring Structural Dimensions Series Part III: Assembled Rotary Shaft Lip Seal Ring").

[0022] Processing technology of oil seal frame (1, 2):

[0023] Chipping the steel plate to obtain the ring piece→rolling the ring piece→machining→external skeleton (1);

[0024] Chip steel plate to get the ring part → roll forming the ring part → inner skeleton (2)

[0025] Spring sheet (3) processing technology: punching tooling → wire cutting preforming → stamping forming. Of course, other common hardware processing techniques such as punching and forming can also be used. In addition, other similar leaf spring structures can also be used to achieve a similar effect to provide radial force for the oil seal.

[0026] The processing technology of the sealing ring (4): polytetrafluoroethylene powder, filler → sintering → tube material or bar of polytetrafluoroethylene composite mate...

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PUM

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Abstract

The invention discloses an elastic structure polytetrafluoroethylene compound material oil seal, which consists of a metal outer framework (1), a metal inner framework pressing ring (2), an elastic sheet (3) and a sealing ring (4) made of a polytetrafluoroethylene compound material. The elastic structure polytetrafluoroethylene oil seal is mainly characterized in that: the elastic sheet (3) behind a main sealing lip is used for providing radial force; and the sealing ring (4) is made of a polytetrafluoroethylene compound material with a machining process. The elastic structure polytetrafluoroethylene oil seal has stable working condition, reliable sealing performance, long service life, high universality and high interchangeability, is convenient to install, is suitable for severe working conditions such as high temperatures, high speeds, dry grinding and the like, and is particularly suitable for engines, rotary separators and the like with high sealing requirements.

Description

technical field [0001] The invention relates to a sealing element, which can adapt to harsh operating conditions such as high temperature (300°C), high speed, dry grinding, etc., and is especially suitable for the conditions requiring high sealing such as engines and rotary separators. Background technique [0002] During the production process, it was found that the PTFE material has a "memory function". At present, PTFE oil seals rely on this principle to play a sealing role. However, the static sealing condition of this oil seal is not good. This is because when the rotating shaft stops rotating, the temperature of the lip of the oil seal decreases, and the "memory function" of the material becomes weaker, so that the radial force of the oil seal will be reduced to not enough to seal Degree. In addition, due to the large creep of the PTFE material, the size of the oil seal will be deformed over time. In addition, the poor elasticity of PTFE materials also caused many s...

Claims

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Application Information

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IPC IPC(8): F16J15/20
Inventor 丁攀攀白骏烈
Owner BEIJING RES & DESIGN INST OF RUBBER IND
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