锻压技术

锻机用先导阀芯驱动伺服阀动态特性AMESim仿真分析

英文标题：AMESim simulation analysis on dynamic characteristics of servo valve driven by pilot value core in forging machine

作者：徐勇光刘海瑞王东

分类号：TP273

出版年,卷(期):页码：2022,47(2):167-171

摘要：

为了实现液压机用伺服阀的流量精确控制，开发了一种以电驱丝杠推动先导阀芯的伺服阀，以达到高精度控制的效果和显著减弱液压引起的冲击力作用。先导进液阀与主进液阀之间保持相互嵌套的状态，具有反馈机械位置信息的功能。并利用AMESim仿真平台对其进行仿真分析。阶跃响应特性表明：到达0.04 s时，主进液阀芯开始关闭，在0.1 s时主阀出口流量达到282 L·min-1，设计满足性能要求。启闭特性表明：先导阀芯开启后，主进液阀芯相对先导进液阀芯速度更慢，引起了明显滞后，之后达到完全开启状态。级间位置匹配特性表明：先导进液阀芯关闭，之后主进液阀芯发生跟随关闭，同样会产生静差。

In order to improve the precision control of flow for the servo valve used in forging hydraulic press, a servo valve with an electric drive screw driving pilot valve core was developed to achieve high precision control effect and significantly reduce the impact force caused by hydraulic pressure, and the pilot inlet valve and the main inlet valve were kept in a nested state to have feedback function of mechanical position information. Then, the AMESim simulation platform was used for simulation analysis. The step response characteristics show that the main inlet valve core closes when it reaches 0.04 s, and the main valve outlet flow rate reaches 282 L·min-1 when it reaches 0.1 s, which meet the performance requirements. The opening and closing characteristics show that after the pilot valve core is opened, the speed of the main inlet valve core is slower than that of the pilot inlet valve core, causing obvious lag, and then reaching the fully open state. The characteristics of position matching between stages indicate that the pilot inlet valve core closes, and then the main inlet valve core follows and closes, which also produces static difference.

基金项目：

河南省科技厅基金项目（192102210173）

作者简介：徐勇光（1978-），男，硕士，讲师,E-mail：tr13511us06@126.com

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