高速电液执行器的性能仿真及研究*

作者：朱旭，孔晓武，邵威 日期：2008-06-23/span> 浏览：3873 查看PDF文档

高速电液执行器的性能仿真及研究*

朱旭，孔晓武，邵威
(浙江大学 流体传动及控制国家重点实验室，浙江 杭州 310027)

摘要：针对高速开关阀流量限制导致的单高速开关阀驱动的电液执行器响应速度慢的问题，在对应用于活塞式变排量压缩机上的高速电液执行器进行性能分析的基础之上，提出了高速开关阀作为先导阀、二级机械阀作为配流阀的方案，建立了数学模型，并进行了仿真。仿真结果证明，电液执行器的响应时间可以满足实际工况要求，同时电液执行器采用先导式结构，系统只需要输出一个高速开关阀的开关信号即可控制配流阀门的启/闭，与多高速开关阀并联驱动相比，减少了电控阀的数量，提高了系统可靠性。
关键词：高速开关阀；二级机械阀；响应时间；电液执行器
中图分类号：TH137文献标识码：A文章编号：1001-4551(2008)05-0032-03

Analysis and simulation of fast electrohydraulic actuator
ZHU Xu, KONG Xiaowu, SHAO Wei
(State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University, Hangzhou 310027, China)
Abstract: The performance of high speed electrohydraulic actuator applied to piston variable displacement compressor was analyzed. According to the slow response of electrohydraulic actuator driven by single high speed on/off valve，which was leaded by the restrained volume of high speed onoff valve，the solution that using a high speed onoff valve as the pilot valve and a secondary valve as the distributing valve was presented. The simulation results indicate that the high speed electrohydraulic actuator response time fit practical work conditions. At the same time, the pilot structure of high speed electrohydraulic actuator makes it possible to control openclose of distributing valve only by exporting one on/off signal on the high speed on/off valve. This solution improves system stability, decreases number of electrovalves, compared with multivalve control method.
Key words: high speed on/off valve; secondary valve; response time; electrohydraulic actuator
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