Polyimide composite material-fluororubber material combined seal

A polyimide composite material, polyimide technology, which is applied in the direction of engine sealing, engine components, mechanical equipment, etc., can solve the problems of creep elasticity, poor static sealing performance, etc. Improve dynamic sealing performance and increase the effect of sealing area

Pending Publication Date: 2022-07-08
BEIJING RES & DESIGN INST OF RUBBER IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

One part of the combination is to solve the problem of poor static sealing performance of existing similar seals by proposing a seal of elastic structure made of polyimide composite material, and can overcome the creep and The problem of poor elasticity

Method used

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  • Polyimide composite material-fluororubber material combined seal
  • Polyimide composite material-fluororubber material combined seal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0017] The design reference standard GB / T9877.3-1988 for the sealing frame (1, 2, 3) ("The third part of the structural dimension series of the rotary shaft lip seal: the assembled rotary shaft lip seal").

[0018] Processing technology of sealing frame (1,2,3):

[0019] Chip steel plate to obtain ring parts→roll forming ring parts→machining→external frame (1);

[0020] The ring piece is obtained from the chip steel plate → the ring piece is roll formed → the inner skeleton (2);

[0021] The ring piece is obtained from the chip steel plate → the ring piece is roll formed → the metal skeleton pressing ring (3);

[0022] The processing technology of the fluororubber sealing ring (4): sandblasting, gluing, and baking treatment of the inner frame (2) → one-stage vulcanization of the mixed rubber and the inner frame (2) → secondary vulcanization → trimming inspection → assembling carbon steel spring (5)

[0023] Processing technology of the sealing ring (6): polyimide olefin pow...

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PUM

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Abstract

The invention discloses a polyimide composite material-fluororubber material combined seal which is composed of a metal outer framework (1), a metal inner framework (2), a metal framework pressing ring (3), a fluororubber sealing ring (4), a carbon steel spring (5), a polyimide sealing ring (6) and a spring piece (7). The sealing device is mainly characterized in that the fluororubber sealing ring (4) and the carbon steel spring (5) are combined to seal oil, the carbon steel spring (5) provides corresponding holding force for the fluororubber sealing ring (4), the polyimide sealing ring (6) is made through a machining process and combined with the spring piece (7) to seal gas, and the spring piece (7) improves the following performance of the polyimide sealing ring (6). Through the combination of different materials and different structure seals, a sealing product can seal grease and high-pressure air at the same time, and the sealing performance is maintained at a reasonable level for a long time. The sealing device is stable in working condition, reliable in sealing performance, long in service life, convenient to install, good in universality and interchangeability, capable of adapting to working conditions of high temperature, high speed, dry grinding and the like, and particularly suitable for the severe environment where a sealing shaft jumps randomly and other conditions with the harsh sealing requirement.

Description

technical field [0001] The invention relates to a combined seal, the seal uses different materials to meet the sealing of different media, special fluorine rubber material seals grease, and polyimide composite material seals high-pressure air. The sealing product can adapt to high temperature, high speed, dry Grinding and other harsh working conditions, it is especially suitable for the harsh environment with random runout of the sealing shaft and other conditions with high sealing requirements. Background technique [0002] In the production process, it was found that the polyimide material has a "memory function". At present, polyimide sealing relies on this principle to play a sealing role. However, the static sealing of this kind of seal is not good. This is because when the rotating shaft stops rotating, the temperature of the sealing lip decreases, and the "memory function" of the material becomes weak, so that the radial force of the seal is reduced to insufficient s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16J15/3232F16J15/3212F16J15/3284
CPCF16J15/3232F16J15/3212F16J15/3284
Inventor 刘冬亮丁攀攀白骏烈
Owner BEIJING RES & DESIGN INST OF RUBBER IND
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