泵阀联合电动静液作动器高效率设计分析

J4 ›› 2008, Vol. 19 ›› Issue (13): 0-1637.

• 科学基金 •

泵阀联合电动静液作动器高效率设计分析

纪友哲;祁晓野;裘丽华;王占林

收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2008-07-10 发布日期:2008-07-10

High Efficiency Design Analysis of Pump and Valve Combined EHA

Ji Youzhe;Qi Xiaoye;Qiu Lihua;Wang Zhanlin

Received:1900-01-01 Revised:1900-01-01 Online:2008-07-10 Published:2008-07-10

摘要/Abstract

摘要：

分析了泵阀联合电动静液作动器效率的影响因素，提出了提高负载压力设计值的提高效率的方法。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、作动系统整体效率变化进行了分析，并分析了负载压力设计值变化对系统主要性能参数的影响。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。系统快速性在小负载状态下提高，在大负载状态下降低，稳定性增强，抗扰动能力和响应下降。以弹性负载为对象的作动系统仿真及实验分析验证了设计方法的可行性。
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关键词: 泵阀联合；电动静液作动器；效率；性能

Abstract:

The influencing factors on efficiency of the valve control section of valve and pump combined EHA were analyzed. A 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 and other main performance parameters caused by load pressure change were analyzed under the same working conditions. The result indicates that the system efficiency is improved in some range due to increase in design value of load pressure. The rapidity becomes better under low load condition and worse under high load condition. The stability becomes better, the disturbance rejection and response becomes worse. The simulation and experimental analysis of actuation system based on spring load proves the feasibility of new method.

Key words: pump and valve combined；electrical hydraulic actuator(EHA)；efficiency；performance

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