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Abstract
In the process of gas charging and discharging of gas cylinder, the fluid pressure fluctuates causing fretting wear of rubber sealing ring, which affects the sealing performance. The model of O-ring that installed at the mouth of the gas cylinder was established to study the fretting wear in the static seal. Effects of fluid pressure, compression ratio, friction coefficient and temperature on the fretting wear of the O-ring were considered. The results show that the fretting wear of O-ring can be divided into non-contact region, slip region and sticky region. In the static seal, the compression ratio and friction coefficient are the main factors affecting the fretting wear. The sealing performance is greatly influenced on the compression ratio and it is less affected by the temperature. The junction of slip region and sticky region has the greatest probability of seal failure.
Highlights
As a one-time or refillable pressure vessel, the gas cylinder is often installed in the trunk of a car to store hydrogen, natural gas and other gas fuels
Baek [9] studied the influence of temperature and surface roughness of the hard counterpart on the fretting characteristics of a rubber coating. These studies hardly focus on the fretting wear of the seal ring that caused by the fluid pressure fluctuation in the gas cylinder
In this paper, the fretting wear of O-ring that installed at the gas cylinder mouth under the fluid pressure fluctuation is studied
Summary
As a one-time or refillable pressure vessel, the gas cylinder is often installed in the trunk of a car to store hydrogen, natural gas and other gas fuels. With the fluid pressure fluctuation, the sealing surface of sealing ring appears fretting causing fretting wear to lead the rubber chips and cracks. Studying the fretting wear characteristics of the sealing ring is great significance to improve the safety and service life of the gas cylinder. Baek [9] studied the influence of temperature and surface roughness of the hard counterpart on the fretting characteristics of a rubber coating. These studies hardly focus on the fretting wear of the seal ring that caused by the fluid pressure fluctuation in the gas cylinder. In this paper, the fretting wear of O-ring that installed at the gas cylinder mouth under the fluid pressure fluctuation is studied. Friction coefficient and temperature field on the fretting wear is explored to improve the safety and service life of gas cylinder
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