氮气弹簧动密封性能的有限元分析  

Finite Element Analysis on Dynamic Sealing Performance of Nitrogen Spring

作　　者：邵振振 方素平 刘永亚 董思龙 SHAO Zhen-zhen;FANG Su-ping;LIU Yong-ya;DONG Si-long(School of Mechanical Engineering,Hefei University of Technology Xuancheng Campus,Xuancheng242000,China;Xuancheng Huafeng Machinery Co.,Ltd.,Xuancheng242000,China)

机构地区：[1]合肥工业大学宣城校区机械工程系,安徽宣城242000 [2]宣城市华风机械有限责任公司,安徽宣城242000

出　　处：《液压气动与密封》2018年第8期80-85,共6页Hydraulics Pneumatics & Seals

基　　金：宣城市科技计划项目(XC2015XKKJ01)资助

摘　　要：氮气弹簧是一种利用高压氮气作为工作介质的新型弹性元件,其所使用Yx型橡胶密封圈的密封性能对其工作可靠性与寿命有重要影响。该文基于超弹性理论,采用ABAQUS软件对7500型氮气弹簧Yx型橡胶密封圈进行动密封性能的有限元分析,研究不同参数对氮气弹簧动密封性能的影响。结果表明:橡胶密封圈的硬度越高,最大接触压力越大,抵抗变形的能力越强;柱塞杆与缸套之间的配合间隙在0.035～0.16 mm范围内,可以保证Yx型密封圈的可靠性;Yx型密封圈的最大Mises应力随着其与柱塞杆之间摩擦系数的增加先减小后增加,因此应将Yx型密封圈与柱塞杆接触表面的摩擦系数控制在合理范围内。Nitrogen spring is a new type of elastic element which uses high pressure nitrogen as working medium,the sealing performance of the Yx rubber sealing ring has great effect on its operational reliability and life.In this paper,based on super elasticity theory,ABAQUS software was used to analyze dynamic sealing performance of type 7500 nitrogen spring Yx rubber sealing ring,the effect of different parameters on dynamic sealing performance of nitrogen spring was studied.The results show that the greater the hardness of the rubber sealing ring,the greater the maximum contact pressure,and the greater the ability to resist deformation.When the fit clearance between plunger rod and cylinder sleeve is within the range of 0.035~0.16 mm,the reliability of the Yx sealing ring can be guaranteed.The maximum Mises stress of Yx sealing ring decreases first and then increases with the increase of friction coefficient,so the friction coefficient of the contact surface between Yx sealing ring and cylinder sleeve should be controlled within a reasonable range.

关 键 词：氮气弹簧 Yx型密封圈 ABAQUS 有限元 

分 类 号：TB42[一般工业技术]