π桥电液比例溢流阀负载特性  

LOAD CHARACTERISTICS OFπ-BRIDGE ELECTROHYDRAULIC PROPORTIONAL RELIEF VALVE

作　　者：胡燕平[1] 谌铎文[1] 毛征宇[1] 

机构地区：[1]湖南科技大学机电工程学院,湘潭411201

出　　处：《机械工程学报》2007年第11期206-211,共6页Journal of Mechanical Engineering

基　　金：湖南省教育厅重点资助项目(06A019)。

摘　　要：设计一种以G型π桥液阻网络为先导控制回路的新型电液比例溢流阀,分析该阀的工作原理,确定该阀的结构及设计参数。建立由π桥电液比例溢流阀液阻的流量压力方程和阀芯力平衡方程构成的稳态特性方程组,通过对稳态特性方程组的线性化处理,得到表述π桥电液比例溢流阀稳态流量压力特性的解析表达式,并由此推导出该阀在理论上实现调压偏差为零的参数表达式,为该阀的参数设计提供正确的计算方法。用数值计算方法计算液阻参数不同时的π桥电液比例溢流阀负载特性。研制π桥电液比例溢流阀样机,完成该样机在不同液阻参数条件下的稳态特性试验。试验与理论研究结果表明,π桥电液比例溢流阀具有比传统电液比例溢流阀更好的负载特性。A new type electro-hydraulic proportional relief valve with G-π bridge pilot hydraulic resistance network is designed. The principle of the valve operation is analyzed. The construction and parameters of the valve are determined. The steady state equations are written out, which describe the flow pressure performances about the hydraulic resistances and force balance characteristic on the main poppet and pilot poppet. Furthermore, the relational equation of the parameters for the valve with zero override is obtained, which offers the calculation method for the design of the valve. The load characteristic of the valve with different hydraulic resistances is simulated by numerical computation. The new valve is developed and the steady state performance of the valve with different hydraulic resistances is measured. The＂ results of experiment and simulation show that load characteristic of the π bridge electro-hydraulic proportional relief valve is much better than traditional proportional relief valve.

关 键 词：G型π桥液阻网络 比例溢流阀 负载特性 数值计算 

分 类 号：TH137.1[机械工程—机械制造及自动化]