摘要
为提高纯水介质下液压缸活塞用鼓形密封的性能,以ZY10000-20-40DB型掩护式液压支架的活塞密封为研究对象,利用Ansys有限元软件建立鼓形密封结构二维轴对称模型,通过正交试验的方法,分析活塞内外行程情况下,不同密封沟槽结构参数和密封圈结构参数的鼓形密封的密封性能以及破损特性,并对鼓形密封结构进行优化。结果表明:相比于密封圈结构参数,密封沟槽结构参数对密封性能的影响较小,沟槽内倒角的尺寸变化对密封性能没有影响;密封圈边长尺寸过大或过小都会引起应力的集中;最大von Mises应力和接触应力都随着密封圈外凸圆弧半径的增大而增大,随着密封圈内凹圆弧半径的增大而减小。优化后的鼓形密封的最大接触应力增大18%~20%,密封性能显著提升。
In order to improve the performance of drum seal for hydraulic cylinder piston in pure water medium,taking the piston seal of ZY10000-20-40 DB shield hydraulic support as the research object,a two-dimensional axisymmetric model of drum seal structure was established by using Ansys finite element software.The sealing performance and damage characteristics of the drum seal with different sealing groove structure size and sealing ring structure size were analyzed by orthogonal test method under the condition of piston inner stroke and outer stroke,and the drum seal structure was optimized.The results show that compared with the structural parameters of the sealing ring,the structural parameters of the sealing groove have little effect on the sealing performance,and the change of chamfer size in the groove does has no effect on the sealing performance.Excessive or too small size of the seal ring edge will cause stress concentration.The maximum von Mises stress and contact stress increase with the radius of convex arc outside the seal ring,and decrease with the radius of concave arc inside the seal ring.The maximum contact stress of the optimized drum seal increases by 18% to 20%,and the sealing performance is significantly improved.
作者
周新建
邵宏斌
ZHOU Xinjian;SHAO Hongbin(School of Mechanical Engineering,Xi’an University of Science and Technology,Xi’an Shaanxi 710054,China)
出处
《润滑与密封》
CAS
CSCD
北大核心
2022年第6期94-100,共7页
Lubrication Engineering
基金
陕西省自然科学基础研究计划-联合基金项目(2019JLM-50)。
关键词
纯水液压缸
鼓形密封
正交试验
结构优化
pure water hydraulic cylinder
drum sealing
orthogonal test
structure optimization
