往复密封轴用ZHM气动组合密封圈密封性能仿真分析

Simulation Analysis of Sealing Performance of ZHM Pneumatic Combined Sealing Ring for Reciprocating Seal Shaft

为研究往复密封轴用ZHM型气动组合密封圈在静、动密封工作时的密封性能,利用有限元软件ANSYS建立ZHM气动组合密封圈二维轴对称有限元模型,分析压缩率、摩擦系数、工作压力、往复运动速度对其密封性能的影响。结果表明:摩擦系数的增大对其密封性能无明显影响;速度的增加对外行程影响较小,内行程随速度的增加而增大;密封圈的压缩率以及工作压力的增大均会使其密封性能提升,但同时也会产生密封圈松弛、磨损等负面影响。

In order to study the sealing performance of ZHM pneumatic combined sealing ring for reciprocating seal shaft in static and dynamic sealing,a two-dimensional axisymmetric finite element model of ZHM pneumatic combined sealing ring was established by finite element software ANSYS.The influences of compressibility,friction coefficient,working pressure and reciprocating speed on its sealing performance were discussed.The results show that the increase of friction coefficient has no obvious effect on its sealing performance,the increase of speed has little effect on the external stroke,the internal stroke increases with the increase of speed,and the increase of compression rate of the sealing ring and working pressure improves the sealing performance,but causes negative effects like loosening and wear of the sealing ring in the minetime.