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26

2020

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02

What are the factors that affect the performance of ultra-high pressure seals

Ultra-high pressure sealing ring is widely recognized because of its advantages of low leakage and long life. With the rapid development of national economic construction, it has made continuous progress, and various institutions have appeared according to different working conditions. However, no matter what kind of structure, there is a sealing end face (friction surface) composed of a moving ring and a static ring, a buffer compensation mechanism, and an auxiliary seal and a transmission mechanism.


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     Ultra-high pressure sealing ringDue to the advantages of low leakage and long life, it is widely recognized. With the rapid development of national economic construction, continuous progress has been made, and various institutions have appeared according to different working conditions. However, no matter what kind of structure, there is a sealing end face (friction surface) composed of a moving ring and a static ring, a buffer compensation mechanism, and an auxiliary seal and a transmission mechanism.

 

Ultra-high pressure sealing ringThe sealing performance is the most important index, usually its service life is at least 8000-10000 hours, but in actual work, wear is inevitable, and in some cases it does not even reach the degree of wear, but the surface of the sealing surface is not smooth or other parts fail, which can make the service life not reach the above expected value.

 

Ultra-high pressure sealing ringThe main failure form is leakage, but there are many factors. For example, the movement speed, when the movement speed is very high, the lubricating oil ink is destroyed, the seal can not be well lubricated and friction heat, resulting in a greatly reduced life. The working pressure, working medium, lateral load, material, installation, hydraulic shock, etc., which link has problems, its sealing will be affected.

 

Ultra-high pressure sealing ringThe high failure rate is mainly due to the failure of the moving ring to compensate, the wear of the sealing surface, the damage of the dynamic and static ring, the fracture of the spring, the failure of the O-ring seal, etc. We usually divide the factors affecting the performance into two categories: the use conditions and the seal itself. The seal structure, material and manufacturing belong to the manufacturer, while the installation, medium and use belong to the scope of the use conditions. Therefore, it is particularly important to understand its performance.

 

Key words:

High pressure seal,Ultra high pressure seal,Internal high pressure seal,Ultra-high pressure sealing ring