Effect of disk spring on the seal of the liquid-jet hammer

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Journal of Vibration and Shock ›› 2016, Vol. 35 ›› Issue (22) : 221-225.

Wu Dongyu, Peng Jianming, Sun Qiang, Zhangxinxin ,Yang Dongdong

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Abstract

Through the sealing tests and simulation based on ANSYS-LSDYNA, the effect of disk spring on seal of sealing rings in SC-86H liquid-jet hammer was investigated. The results show that the gap of sealing surface between sealed cap and fluidic amplifier was a key factor which caused the failure of sealing ring under high-pressure fluid environment. The negative correlation between values of gaps and amounts of superposed disk springs was present. With no more than three disk rings, the sealing rings were destroyed as the value of gap was over 0.187mm. When the amount of disk ring was four, the gap achieved 0.086mm and the sealing rings may fail to seal after longtime work. In order to ensure that the sealing rings worked safely, the amount of disk ring should no less than five so that the value of gap can reduce to 0.049mm below. It was also found that the maximum stress in disk springs would decrease with the increasing amount of disk spring, and five disk springs can meet the acquirement of sealing and strength design simultaneously.

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disk spring / liquid-jet hammer / high-pressure fluid / separated gap / sealing ring / ANSYS-LSDYNA

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Wu Dongyu, Peng Jianming, Sun Qiang, Zhangxinxin,Yang Dongdong. Effect of disk spring on the seal of the liquid-jet hammer[J]. Journal of Vibration and Shock, 2016, 35(22): 221-225

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