中国机械工程2018，Vol.29Issue(8)：893-899,7.DOI:10.3969/j.issn.1004-132X.2018.08.002
配合间隙对溢流阀稳态液动力的影响
Influences of Fit Clearances on Steady-state Fluid Forces of Relief Valves
摘要
Abstract
Aiming to solve the pressure regulating precision of electro-hydraulic proportional relief valves affected by steady-state fluid forces,a flow force mathematical model of converged flow spool valves was built.The valve model considering fit clearances was established based on CFD,and a test rig was set up to validate the correctness of the model.Then the influences of different fit clearances on steady-state fluid forces of spool valves were studied.The results show that the spool valve model considering fit clearances has a good coincidence with test results.While relief valve is working,the valve opening is close to fit clearance extremely.As pressure increases,valve opening becomes smal-ler,and jet angle gets close to 20°.As the clearance increases,valve opening turns smaller,jet angle becomes bigger.In a certain ranges,steady-state fluid forces increase with the increase of clearances,and fit clearances have a small influence on steady-state fluid forces when clearances reach the critical values.关键词
稳态液动力/溢流阀/射流角/配合间隙Key words
steady-state fluid force/relief valve/jet angle/fit clearance分类
信息技术与安全科学引用本文复制引用
瞿道海,周云山,罗威,刘云峰,傅兵..配合间隙对溢流阀稳态液动力的影响[J].中国机械工程,2018,29(8):893-899,7.基金项目
国家自然科学基金资助项目(51475402) （51475402）
