摘要
为研究旋转组合密封圈表面结构对密封性能的影响规律,对方圈表面分别加工单槽和双槽等不同表面结构,利用ABAQUS仿真分析不同表面结构的旋转组合密封圈在完成过盈安装与流体加载后的应力及接触压力分布,并研究油槽宽度变化对组合密封性能的影响。仿真结果表明:在过盈安装与流体加载情况下,O形圈的最大von Mises应力均有所减少,而带槽密封圈最大von Mises应力都出现增长,且过盈安装状态下应力增幅较大;带槽密封圈接触面被油槽分为多段,每段接触压力曲线相似,而接触压力均有不同程度的增大;方圈最大von Mises应力值在过盈安装状态下随着宽度增加而增大,在流体加载状态下随着宽度增加有不同程度的减小。方圈表面增加油槽有利于在动密封面上形成多个动压润滑区域,对增强密封性能、改善润滑条件具有一定作用,但增加油槽后会增大方圈应力,增加疲劳损坏风险。
In order to study the influence of surface structure of the combination seal on the sealing performance,single groove and double groove were machined on the surface of square ring.ABAQUS was used to simulate and analyze the stress and contact pressure distribution of rotary combination seal rings with different surface structures after interference installation and fluid loading.The influence of the size change of the oil groove width on the combined sealing performance was studied.The simulation results show that the maximum von Mises stress of the O-ring is decreased after interference installation and fluid loading,while the maximum von Mises stress of the grooved sealing ring is increased,and the stress increase is larger after interference installation.The contact surface of the grooved sealing ring is divided into multiple sections by the oil groove,the contact pressure curves of each section are similar in shape,but the contact pressure is increased in different degrees.The maximum von Mises stress value of the square ring is increased as the oil groove width increases under interference installation state,while the maximum von Mises stress value is decreased to varying degrees under fluid loading state.The addition of oil grooves on the surface of the square ring is conducive to the formation of multiple dynamic pressure lubrication areas on the dynamic sealing surface,which has a certain effect on enhancing sealing performance and improving lubrication conditions.However,adding oil grooves will increase the stress of the square ring and the risk of fatigue damage.
作者
赵乐
索双富
时剑文
李高盛
ZHAO Le;SUO Shuangfu;SHI Jianwen;LI Gaosheng(School of Mechanical Engineering,Tsinghua University,Beijing 100084,China;Institute of Science and Technology,State Power Investment Corporation Limited,Beijing 102200,China)
出处
《润滑与密封》
CAS
CSCD
北大核心
2021年第1期19-26,共8页
Lubrication Engineering
基金
国家重点研发计划项目(2017YFF0108101)
国家电投科研基金项目(C-ZY04-201803).
关键词
组合密封
表面结构
高压动密封
密封性能
combination seal
surface structure
high-pressure dynamic seal
sealing performance
