泵阀联合EHA低温升设计研究  

Research on Low Temperature Rise Design of Pump and Valve Combined EHA

作　　者：纪友哲[1] 祁晓野[1] 裘丽华[1] 王占林[1] 

机构地区：[1]北京航空航天大学自动化科学与电气工程学院,北京100083

出　　处：《系统仿真学报》2009年第7期1950-1953,共4页Journal of System Simulation

基　　金：国家自然科学基金资助项目(50375009)

摘　　要：分析了导致飞行器液压作动系统温度升高的主要因素以及采用多级供油压力提高效率的可行性,针对泵阀联合EHA(电动静液作动器)的工作特点,提出了提高负载压力设计值提高效率的方法,在负载相同的条件下,对伺服阀和定量泵的输出流量、损耗流量变化、作动系统整体效率变化进行了分析。结果表明,相对于常规阀控系统设计,提高负载压力设计值的方法可在一定范围内提高系统效率,流量损耗引起的功率损耗对以位置控制为主的EHA有较大的影响。以弹性负载为对象的作动系统仿真计算表明:多级压力设计与提高负载压力设计值设计可以有效降低作动系统温度。The key factors cause temperature rise of hydraulic oil and the feasibility of actuator system efficiency by using multi-rank supply pressure were analyzed. According to the working characteristics of the pump and valve combined EHA （Electrical Hydraulic Actuator）, the method to improve the system efficiency by increasing the design value of load pressure was proposed. The change of output flow, losing flow of servo valve and pump, total efficiency of actuation system caused by design value of load pressure change were analyzed at the same working condition. The result indicates that the system efficiency is improved in some range due to increase in design value of load pressure. The power loss caused by losing flow has large effect on the position control system. The simulation testing of actuation system based on spring load proves that using the multi-rank supply and increasing design value of load pressure can decrease actuator system temperature effective.

关 键 词：温升 泵阀联合 EHA 负载压力 效率 

分 类 号：V245.1[航空宇航科学与技术—飞行器设计] TH137[机械工程—机械制造及自动化]