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Ageing life testing method for O-shaped rubber sealing ring

A technology of life test and O-ring sealing ring, which is applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of high cost, poor precision, and long test cycle

Inactive Publication Date: 2018-05-29
CHINA AERO POLYTECH ESTAB +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since most of the sealing rings are products with high reliability and long life, the traditional life test method has long test period, high cost and poor precision.

Method used

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  • Ageing life testing method for O-shaped rubber sealing ring
  • Ageing life testing method for O-shaped rubber sealing ring
  • Ageing life testing method for O-shaped rubber sealing ring

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0034] The technical scheme of the present invention will be described in further detail below in conjunction with accompanying drawing and embodiment:

[0035] The rubber material in this kind of rubber-made O-type sealing ring aging life test method is EPDM, and it is characterized in that: the step of this method is as follows:

[0036] Step 1. Carry out a failure criterion test on the rubber O-ring. The test steps are as follows:

[0037] 1.1 Select 3 sealing ring samples and place them in the sealing groove (2) of the flange (1), and assemble the flange (1) and the flange cover (3) through bolts (4), see attached figure 1 shown;

[0038] 1.2 Put the test piece assembled in step 1.1 into the high-temperature aging box to raise the temperature to 130°C and keep it warm for 24 hours. After taking the test piece out of the high-temperature aging box, take out the three sealing ring samples and let it stand at room temperature for 24 hours;

[0039] 1.3 Measure the thicknes...

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Abstract

The invention provides an ageing life testing method for an O-shaped rubber sealing ring. The method comprises a failure determining test and an accelerating life test, wherein the failure determiningtest comprises the following steps: grouping sealing ring samples; correspondingly storing in an ageing box with gradient temperature property; performing high-temperature ageing, compression and recovery, and measuring of the permanent compression deformation rate of the sealing ring; the accelerating life test comprises the following steps: grouping a certain number of sealing ring samples; assembling into test tools with the same medium as the sealing ring product based on the test requirement; circularly performing high-temperature ageing, compression and recovery, and measuring of the permanent compression deformation rate of the sealing ring under gradient temperature loads below the high temperature tolerance limit of the sealing ring correspondingly, until the permanent deformation rate of 50% or more of sealing ring samples in each group reaches the failure standard. With the adoption of the method, the service life of the sealing ring can be accurately and effectively predicated, and mechanical equipment can normally run through the method.

Description

technical field [0001] The invention relates to a method for testing the aging life of a rubber O-shaped sealing ring, which belongs to the field of mechanical equipment reliability and life prediction. Background technique [0002] As an extruded sealing element, the sealing ring is mainly used for sealing the butt joint surface of the shell flange in mechanical equipment. The sealing mechanism is a static seal installed in the axial direction. In the middle, it will be squeezed by the connecting flange and bear the compressive stress caused by the extrusion, resulting in deformation. After a long period of use, the sealing ring will age due to the use of the environment and stress, and its sealing performance will continue to degrade accordingly, and the degree of deformation will continue to increase. The surface of the sealing ring will gradually become hard, the elastic performance will decrease, and the deformation The recovery ability gradually weakens until the seal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N17/00
CPCG01N17/00
Inventor 陈允崔博源边智刘昭孟理华黄爽滕明
Owner CHINA AERO POLYTECH ESTAB
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