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Method for assessing remaining service life of rubber sealing ring

A technology of rubber sealing ring and life evaluation, applied in the field of rubber sealing ring, can solve the problems affecting the accuracy of life evaluation of rubber sealing ring, etc., and achieve the effect of good universality

Inactive Publication Date: 2016-11-16
NO 59 RES INST OF CHINA ORDNANCE IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since there will be a certain degree of difference in the material composition and size between the old and new rubber seal rings, this will inevitably lead to the difference between the performance change law of the new rubber seal ring obtained in the test and the actual performance change law of the rubber seal ring on the spring, which will affect the performance of the rubber seal ring. The life estimation accuracy of seal ring

Method used

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  • Method for assessing remaining service life of rubber sealing ring
  • Method for assessing remaining service life of rubber sealing ring
  • Method for assessing remaining service life of rubber sealing ring

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0034] Evaluation of the remaining storage life of the static seal ring of a missile ejection device that has been stored for 10 years:

[0035] (1) Existing compression set analysis

[0036] By measuring and analyzing the original size of this type of rubber sealing ring, the springback of the section in the direction of compression after disassembly, and its assembly structure and size on the bullet, its original section diameter D 0 =2.5mm, the springback height D of the section in the direction of compression after disassembly 2 = 2.163mm, the compression height D on the bullet 1 = 1.7 mm.

[0037] According to the formula [1], it can be concluded that the compression permanent deformation of the rubber sealing ring after 10 years of bomb storage is:

[0038] ϵ 10 = D 0 - D 2 ...

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Abstract

The invention relates to a method for assessing the remaining service life of a rubber sealing ring. A to-be-assessed object is a rubber sealing ring which is assembled on ammo and other weapons which are stored for some years and has already generated certain compression set. The original radial section height of the to-be-assessed object is known, and the change rule of the compression set generated by the rubber sealing ring in an accelerated aging test is employed for the extrapolation of the change rule of the compression set under the storage temperature, thereby taking an invalid critical value as the basis, and assessing the remaining service life of an old rubber sealing ring.

Description

technical field [0001] The invention relates to a rubber sealing ring which has been assembled on ammunition and other weaponry and has been stored for a certain number of years, and specifically relates to a method for evaluating the remaining life of this type of rubber sealing ring. Background technique [0002] Due to its good sealing properties, the rubber sealing ring has been widely used in the sealing structure of ammunition and other weapons and equipment. The quality of its structural sealing performance directly affects the life and reliability of the ammunition. Materials commonly used as rubber sealing rings include silicone rubber, fluororubber, nitrile rubber and natural rubber, etc. These materials will slowly degrade in physical, chemical and mechanical properties under the long-term action of the environment, causing the rubber sealing ring to lose its sealing ability. is one of the key weak links that limit the life of ammunition. [0003] At present, the...

Claims

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Application Information

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IPC IPC(8): G01M13/00G01N33/44
CPCG01M13/005G01N33/445
Inventor 张凯周堃何建新
Owner NO 59 RES INST OF CHINA ORDNANCE IND
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