非对称喷嘴挡板式电液伺服阀特性分析

中国机械工程 ›› 2011, Vol. 22 ›› Issue (8): 957-960,970.

非对称喷嘴挡板式电液伺服阀特性分析

訚耀保;孟伟

同济大学,上海,200092

出版日期:2011-04-25 发布日期:2011-05-04
基金资助:
国家自然科学基金资助项目(50775161)；航空科学基金资助项目(20090738003)；国家高技术研究发展计划(863计划)资助项目(2007AA05Z119)
National Natural Science Foundation of China（No. 50775161）;

Aviation Science Foundation of China（No. 20090738003）;
National High-tech R&D Program of China (863 Program) （No. 2007AA05Z119）

Characteristics of Electro-hydraulic Servovalve with an Asymmetric Nozzle Flapper

Yin Yaobao;Meng Wei

Tongji University,Shanghai,200092

Online:2011-04-25 Published:2011-05-04
Supported by:

National Natural Science Foundation of China（No. 50775161）;

Aviation Science Foundation of China（No. 20090738003）;
National High-tech R&D Program of China (863 Program) （No. 2007AA05Z119）

摘要/Abstract

摘要：

分析了一种新型非对称喷嘴挡板式电液伺服阀的结构和特性。该阀在两喷嘴容腔处设置一对阻尼节流器，得到了喷嘴容腔和负载压力特性、零位压力特性,以及力矩马达驱动力和刚度设计方法。理论和试验结果表明：内置阻尼节流器的电液伺服阀喷嘴容腔的零位压力小于供油压力的50%，负载容腔的零位压力大于供油压力的50%;液阻系数不对称时，负载压力曲线不对称，其交点偏离中位;为提高零位时负载压力的线性度，液阻系数的取值宜在1.5至2.5之间。

关键词:

非对称喷嘴挡板, 电液伺服阀, 节流器, 容腔, 压力特性

Abstract:

The structure and characteristics of an electro hydraulic servovalve with an asymmetric nozzle flapper which has a pair of hydraulic resistances in

the nozzle chambers were analyzed. The load pressure characteristics, nozzle chamber

pressure characteristics and the pressure characteristics at zero point were obtained. The design method of force and rigidity of the torque motor were discussed. The theoretical results are in good agreement with the experimental ones.The load pressure of electro hydraulic servovalve with an asymmetric nozzle flapper at zero point is bigger than 50% of supply pressure, but the nozzle chamber pressure is less than 50% of supply pressure. The load pressure characteristics are asymmetric, and the cross point of the two load pressure curves deviates the neutral point.The coefficient of hydraulic resistance is suggested to be

1.5 to 2.5 in order to get good linearity of load pressure.

Key words: asymmetric nozzle flapper, electro hydraulic servovalve, resistance, chamber, pressure characteristics

中图分类号:

TH137.5

訚耀保, 孟伟.

非对称喷嘴挡板式电液伺服阀特性分析

[J]. 中国机械工程, 2011, 22(8): 957-960,970.

YIN Yao-Bao, MENG Wei.

Characteristics of Electro-hydraulic Servovalve with an Asymmetric Nozzle Flapper

[J]. China Mechanical Engineering, 2011, 22(8): 957-960,970.

[1]	沈小燕;丁佳为;禹静;李东升. 超精密气体静压系统节流器法向随机微振动研究[J]. 中国机械工程, 2020, 31(20): 2429-2436.
[2]	权凌霄1, 2;郭海鑫1,3;盛世伟3;李雷1. 采用“GA+LM”优化BP神经网络的电液伺服阀故障诊断[J]. 中国机械工程, 2018, 29(05): 505-510.
[3]	姚静1,2,3;王佩3;董兆胜3;孔祥东1,2,3. 开式泵控非对称缸负载容腔独立控制耦合特性[J]. 中国机械工程, 2017, 28(14): 1639-1645.
[4]	胡建军, 孔祥东, 侯冠男, 俞滨, 权凌霄, . 刀尖角容腔对直角转弯流道液流特性影响的PIV试验研究[J]. 中国机械工程, 2015, 26(7): 943-948.
[5]	陆向辉1, 2, 高殿荣1. 两级电液伺服阀双喷嘴挡板阀内流场计算与分析[J]. 中国机械工程, 2012, 23(16): 1951-1956.
[6]	訚耀保, 张曦, 李长明. 一维离心环境下电液伺服阀零偏值分析[J]. 中国机械工程, 2012, 23(10): 1142-1146.