Transactions of Materials and Heat Treatment

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

Authors： Xu Yongguang Liu Hairui Wang Dong

Unit： Zhoukou Vocational and Technical College Henan Normal University Henan Longteng Forging Machinery Equipment Co. Ltd.

KeyWords： pilot valve core proportional valve flow control AMESim simulation step response steady state error

ClassificationCode：TP273

year,vol(issue):pagenumber：2022,47(2):167-171

Abstract：

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.

Funds：

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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