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Double-seal plunger pressure relay

A double seal and relay technology, applied in the hydraulic field, can solve the problems of insufficient plunger support and poor sealing reliability, and achieve the effects of long service life, reliable sealing and improved action sensitivity.

Pending Publication Date: 2022-02-18
SHANGHAI LIXIN HYDRAULIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the deficiencies in the sealing scheme of the existing plunger pressure relay technology, the purpose of the present invention is to provide a double-sealed plunger pressure relay to solve the problems of poor sealing reliability and insufficient plunger support

Method used

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  • Double-seal plunger pressure relay

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Embodiment Construction

[0027] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific illustrations.

[0028] In view of the lack of support between the outer circle and the inner wall of the sleeve when the plunger is far away from the sealing ring in the existing relay, it is easy to rub against each other and cause mutual wear, which affects the action sensitivity and service life, and greatly reduces the working efficiency in the working process. This example solution provides a double-sealed plunger pressure relay on the basis of the prior art.

[0029] The steel sleeve is used as the main pressure-bearing part in the double-sealed plunger pressure relay, which is installed in the aluminum alloy shell, and the overall weight is light; at the same time, the Y-shaped sealing ring with a small contact area is used as the main part. For the seal...

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Abstract

The invention discloses a double-seal plunger pressure relay. A first sealing piece is arranged between one end, close to the oil inlet of a sleeve, of a plunger and the sleeve, a second sealing piece is arranged between the other end of the plunger and the sleeve, and the first sealing piece and the second sealing piece form double supports for preventing hard contact between the outer circle of the plunger and the inner wall of the sleeve on the plunger. According to the scheme of the double-seal plunger pressure relay provided by the invention, a double-seal combined structure of main seal and auxiliary seal is adopted between the plunger and the sleeve, and double support is formed through the two seal rings, so that hard contact between the outer circle of the plunger and the inner wall of the sleeve is avoided, the total friction force is reduced, the action sensitivity is improved, and the service life is also prolonged; therefore, the problems that in an existing scheme, sealing pieces are damaged, abraded and aged to cause external leakage, the plunger leaves the outer circle of the sealing ring and is lack of support with the inner wall of the sleeve, and action sensitivity and service life are affected by mutual abrasion are solved.

Description

technical field [0001] The invention relates to the field of hydraulic technology, in particular to pressure relay technology. Background technique [0002] In the hydraulic system, it is sometimes necessary to control the hydraulic components through the electrical system according to the change of the pressure value. The pressure relay makes the control circuit on or off through the preset pressure value. [0003] In order to ensure the sensitivity of the action, the existing plunger pressure relay generally only has one seal, and the compression of the seal ring is very small. When the seal is damaged or worn out, it is easy to cause external leakage and pollute the environment. However, the plunger is far away from the sealing ring and the inner wall of the sleeve lacks support, so it is easy to rub against each other and cause mutual wear, which affects the action sensitivity and service life. [0004] It can be seen that how to improve the sealing and reliability of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H35/26
CPCH01H35/26
Inventor 黄建林何俊钱根发朱剑根马欲宏谷文平
Owner SHANGHAI LIXIN HYDRAULIC
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