碟簧对射流式冲击器密封影响研究

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振动与冲击 ›› 2016, Vol. 35 ›› Issue (22) : 221-225.

论文

碟簧对射流式冲击器密封影响研究

吴冬宇，彭枧明，孙强，张鑫鑫，杨冬冬

作者信息 +

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

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

Author information +

文章历史 +

摘要

以SC-86H高压高能射流式冲击器为研究对象，通过密封试验及ANSYS-LSDYNA有限元分析手段，研究了碟簧对用于端面密封的密封圈密封性能的影响。结果表明：在高压流体环境下，碰撞后碟簧变形会引起密封盖与射流元件密封配合面出现分离间隙，而较大的间隙张开量是导致密封圈失效的关键。间隙张开量与碟簧叠合数量负相关，当碟簧叠合数量为三片以下时，最大间隙张开量大于0.187mm，密封圈损毁失效；当碟簧叠合数量为四片时，最大间隙张开量为0.086mm，密封圈存在较高的失效风险；当碟簧叠合数量达到五片以上时，最大间隙张开量小于0.049mm,可保证密封圈密封长期有效。此外,随着碟簧数量增加，碟簧中最大应力下降，三片碟簧叠合可满足碟簧的应力强度最低要求，考虑到疲劳及密封，碟簧数量应选择五片以上。

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.

导出引用

吴冬宇，彭枧明，孙强，张鑫鑫，杨冬冬. 碟簧对射流式冲击器密封影响研究[J]. 振动与冲击, 2016, 35(22): 221-225

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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