摘要
磨损导致的泄漏是往复密封在服役期间常见的失效形式,目前密封圈磨损寿命的预测主要采用实验方法,其过程复杂且时间、经济成本较高,仿真是达到密封圈磨损寿命预测目的较好的途径,但当前缺少对磨损重要因素—速度合适的仿真处理方法。针对实际工程应用密封系统磨损寿命评估的需求,基于混合润滑模型及Rhee磨损理论提出了考虑变速条件的往复密封磨损寿命预测方法,通过分析给定工况下的密封圈唇口轮廓磨损变化情况,模拟了唇口接触压力、接触宽度、接触变形以及反向泵回率等密封性能随磨损时间累加的演化过程,实现了密封圈磨损寿命预测的目标。结合实际工程应用斯特封,进行了与平均速度处理方法的寿命预测对比。结果表明:变速处理法下磨损失效周期泄漏率为3.24 mL/h,平均速度处理法下泄漏率为0.24 mL/h,预测结果存在明显差异,速度的瞬态变化是往复密封磨损仿真速度是不可忽略的因素。
Leakage due to wear is a common form of failure of reciprocating seals during service.At present,the prediction of seal wear life is mainly based on experimental methods,which are complex and have high time and economic costs.Simulation is a better way to achieve the purpose of seal wear life prediction,but currently there is a lack of suitable simulation methods for the important factor of wear-speed.In response to the need for wear life assessment of seal systems for practical engineering applications,a reciprocating seal wear life prediction method considering variable speed conditions is proposed based on the hybrid lubrication model and Rhee wear theory.The evolution of seal performance such as lip contact pressure,contact width,contact deformation and reverse pumping back rate with the accumulation of wear time is simulated by analyzing the change of seal lip profile wear under a given working condition,and the goal of seal wear life prediction is achieved.A comparison of the life prediction with the average speed treatment method is carried out in conjunction with the actual engineering application of the step seal.The results show that the leakage rate of the wear loss cycle under the variable speed treatment method is 3.24 mL/h,and the leakage rate under the average speed treatment method is 0.24 mL/h.There is a significant difference in the prediction results,and the transient change in speed is a factor that cannot be ignored in the reciprocating seal wear simulation speed.
作者
纪佳馨
彭程
项冲
黄乐
郭飞
JI Jiaxin;PENG Cheng;XIANG Chong;HUANG Le;GUO Fei(College of Mechanical and Electrical Engineering,China University of Petroleum,Qingdao 266580;State Key Laboratory of Tribology in Advanced Equipment(SKLT),Tsinghua University,Beijing 100084;Guangzhou Mechanical Research Institute Co.,Ltd.,Guangzhou 510700)
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
2024年第3期191-202,共12页
Journal of Mechanical Engineering
基金
国家重点研发计划(2021YFB3400601)资助项目。
关键词
往复密封
混合润滑
磨损仿真
寿命预测
reciprocating seal
mixed lubrication
wear simulation
life expectancy
