Qualified testing method for seal life of sealing ring

Abstract

A method for detecting the qualified sealing life of a sealing ring, which specifically includes: determining the translation factor of the sealing ring according to the average service temperature of the sealing ring, the test temperature, and the glass transition temperature of the material of the sealing ring. According to the translation factor and design life of the sealing ring, determine the test time of the sealing ring at the test temperature. At the test temperature, keep the sealing ring at the design compression and reach the test time; cool the sealing ring to the average service temperature, measure the material performance parameters of the sealing ring, and calculate the sealing stress of the sealing ring, and compare the sealing stress of the sealing ring with the container of internal pressure. If the sealing stress of the sealing ring is less than the internal pressure of the container, the sealing ring is unqualified; if the sealing stress of the sealing ring is greater than or equal to the internal pressure of the container, the sealing ring is qualified. The above-mentioned detection method for the qualified sealing life of the sealing ring can detect the qualified sealing ring, and can ensure the sealing effect of the high-pressure gas cylinder within the design life.

Description

technical field [0001] The invention relates to a detection method of a sealing ring, in particular to a detection method of a qualified sealing life of the sealing ring. Background technique [0002] In high-pressure gas cylinders, especially fully-wound gas cylinders with plastic liners, their service life mainly depends on the sealing structure and performance of the gas cylinders. Moreover, most of the high-pressure gas cylinders use sealing rings. The sealing ring is installed at the mouth of the high-pressure gas cylinder and forms a sealed valve structure, especially after the sealing ring is installed in the gas cylinder, the sealing ring cannot be disassembled or replaced. The sealing performance and service life of the sealing ring directly determine the sealing performance and service life of the high-pressure cylinder. [0003] At present, at the beginning of design and manufacture, high-pressure gas cylinders will correspond to the designed service life and wo...

AI Technical Summary

Problems solved by technology

However, if the sealing effect of the sealing ring is qualified, it does not mean that the sealing ring can always ensure that its sealing performance meets the design requirements within its designed life time, and it cannot verify whether the actual service life of the high-pressure gas cylinder can meet the design requirements.

Therefore, within the design life of the high-pressure gas cylinder, the sealing ring may also fail to seal, and the high-pressure gas cylinder may leak.

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