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research-article

Investigation of static and dynamic seal performances of a rubber O-ring

[+] Author and Article Information
Jie Zhang

School of Mechatronic Engineering, Southwest Petroleum University, Southwest Petroleum University, Chengdu, 610500, China
longmenshao@163.com

Jingxuan Xie

School of Mechatronic Engineering, Southwest Petroleum University, Southwest Petroleum University, Chengdu, 610500, China
1870591823@qq.com

1Corresponding author.

ASME doi:10.1115/1.4038959 History: Received August 21, 2017; Revised December 19, 2017

Abstract

Rubber O-rings are widely applied in the static and dynamic seal of machinery, energy, chemical, aviation and other fields. Mechanical behavior and sealing performance of the O-ring were investigated in this paper. Effects of pre-compression amount, fluid pressure, friction coefficient on the static and dynamic sealing performances of the O-ring were studied. The results shows that the maximum stress appears on the inside but not surface of the O-ring. The static sealing performance increases with the increasing of fluid pressure and compression amount. Reciprocating dynamic seal performance of the rubber O-ring is different with its static seal, the stress distribution and deformation are changing in reciprocating motion. Sealing performance in outward stroke is better than it in inward stroke. Overturn of the O-ring occurs when the friction torque is greater than the torque caused by fluid pressure in inward stroke. Distortion, bitten and fatigue failure are the main failure modes of the O-ring in dynamic seal. Those results can be used in design, installation and operation of rubber O-rings in static and dynamic seals.

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