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Self-compensation intelligent lip-shaped seal

A lip seal, self-compensating technology, used in engine seals, engine components, mechanical equipment, etc., can solve problems such as leakage, softening of rubber materials, hardening of rubber materials, etc., to achieve long life and good sealing performance.

Inactive Publication Date: 2019-07-05
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the working temperature is too low, the rubber material will harden, and the wear will increase and the seal life will be reduced; if the temperature is too high, the rubber material will soften, and the rebound will be lost, resulting in leakage

Method used

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  • Self-compensation intelligent lip-shaped seal
  • Self-compensation intelligent lip-shaped seal
  • Self-compensation intelligent lip-shaped seal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] The implementation of the present invention will be described in detail below in conjunction with the drawings and examples.

[0022] refer to figure 1 , a self-compensating intelligent lip seal, including a working chamber outer shell 1, a sealing ring body 2 with an interference fit with the working chamber outer shell 1, a metal skeleton 3 embedded in the sealing ring body 2, and the metal skeleton 3 is located on the The upper part of the sealing ring body 2 is arranged in a circumferential direction. The lower part of the sealing ring body 2 has a circumferential groove, and the annular ordinary metal spring 4 is inlaid in the groove. The ordinary metal spring 4 is nested with an SMA memory alloy ring 5. The lower part of the sealing ring body 2 and the radial rotating shaft 6 contacts.

[0023] refer to figure 2 , the SMA memory alloy ring 5 is completely nested inside the ordinary metal spring 4, the inner, outer and wire diameters of the ordinary metal sprin...

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Abstract

The invention discloses a self-compensation intelligent lip-shaped seal. The self-compensation intelligent lip-shaped seal comprises a working cavity outer shell, a sealing ring body in interference fit with the outer shell, a metal framework inlaid in the sealing ring body, a common metal spring inlaid in a groove in the lower part of the sealing ring body, an SMA memory alloy ring nested in thecommon metal spring and a rotating shaft in contact with the sealing ring body; and the SMA memory alloy ring and the common metal spring jointly ensure the contact pressure between a sealing lip anda shaft, the radial force is mainly provided by the common metal spring in a low-temperature section and a normal-temperature section, and the radial force is mainly provided by the SMA memory alloy ring in a high-temperature section. According to the self-compensation intelligent lip-shaped seal, the SMA memory alloy ring is nested in the common metal spring, so that compensation of the radial force in a high-temperature environment is met, excessive abrasion caused by overlarge radial force in a low-temperature environment is avoided, and stable and long-term intelligent sealing in a wide temperature region can be realized.

Description

technical field [0001] The invention relates to a rubber-plastic sealing structure, in particular to a self-compensating intelligent lip seal. Background technique [0002] In industrial production and daily life, seals are an important basic part to ensure the normal operation of mechanical equipment, and have a very important impact on the safety, performance, reliability and environmental protection of the host. Once the sealing structure fails, it will not only cause a large loss of working medium and lubricating liquid, cause environmental pollution, corrode equipment and working environment, but also cause fire and explosion, causing personal and equipment safety accidents. Therefore, research on sealing technology is the focus of current manufacturing development. [0003] Lip seal (hereinafter referred to as lip seal) is a classic rubber and plastic dynamic sealing element. Because of its simple structure, compactness and reliable performance, it can achieve "zero l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16J15/3252F16J15/3212
CPCF16J15/3212F16J15/3252
Inventor 郭飞姜炳岐闫传祥项冲贾晓红王玉明
Owner TSINGHUA UNIV
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