流体机械

2017, v.45;No.542(08) 37-42+63

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高压星形密封圈的密封性能分析
Seal Performance Analysis of a X-ring Seal under High Pressure

王冰清;余三成;孟祥铠;李勇;李纪云;
WANG Bing-qing;YU San-cheng;MENG Xiang-kai;LI Yong;LI Ji-yun;MOE Engineering Research Center of Process Equipment and Its Remanufacture, Zhejiang University of Technology;Shanghai Institute of Spaceflight Control Technology, Shanghai Engineering Research Center of Servo Systems;

摘要(Abstract):

利用ANSYS软件建立了带聚四氟乙烯挡圈的丁腈橡胶星形密封圈结构的二维轴对称几何模型,分析了静压工作状态和往复运动状态下其密封机理、密封性能,并预测了星形密封圈易发生失效的具体部位。结果表明:在高压(流体压力>10MPa)条件下,使用挡圈可以有效缓和星形密封圈的应力集中现象;星形密封圈非压力侧的内侧凸圆靠近挡圈区域易发生磨损失效;内侧的凹圆部位易发生撕裂失效。
The two-dimensional axial symmetric model of Nitrile rubber X-ring seal with PTFE backup ring structure used in hydraulic servo system was created by using the ANSYS software.Thesealing mechanism and sealing performance of the static pressure working state and reciprocating motion state were analyzed, and the specific location of the failure of the sealing X-ringwas predicted. The results showed that the stress concentration phenomenon of the sealing X-ring can be effectively eased with backup ring structure under the condition of high pressure which means medium pressure larger than 10 MPa. The areaof convex of the sealing X-ring in the side withoutpressure which contact with the backup ring prone to wear, and the concavity of the sealing X-ring near to the piston rod is easy to tear off.

关键词(KeyWords): 星形密封圈;挡圈;往复运动;有限元;密封性能
X-ring seal;backup ring;reciprocating movement;finite element method;seal performance

Abstract:

Keywords:

基金项目(Foundation): 国家重点基础研究计划973项目(2014CB046404);; 浙江省自然科学基金项目(LY14E050012)

作者(Authors): 王冰清;余三成;孟祥铠;李勇;李纪云;
WANG Bing-qing;YU San-cheng;MENG Xiang-kai;LI Yong;LI Ji-yun;MOE Engineering Research Center of Process Equipment and Its Remanufacture, Zhejiang University of Technology;Shanghai Institute of Spaceflight Control Technology, Shanghai Engineering Research Center of Servo Systems;

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