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Research on Spool Frequency Response and Flow Output Characteristics of High Speed On-Off Valve
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    Abstract:

    In order to solve the problem that it is difficult to accurately evaluate the frequency response rule and flow output of high speed on-off valve spool in the field of digital hydraulics,a dynamic performance analysis method of high speed on-off valve based on load force function was proposed.The spool dynamics model was derived,the simulation models of electromagnet and the flow field were established,and the no-load dynamic characteristics of the electromagnet were studied.The frequency response and flow output characteristics of the spool were finally obtained by adding the load function and adopting the machine-electric-hydraulic co-simulation method.The simulation results show that the model can reflect the spool frequency response and flow output rule well.The opening time of the high speed on-off valve is 13.9 ms,the closing time is 14.3 ms.When the control frequency is 20 Hz and the duty cycle is from 30% to 70%,the flow modulation linear region is from 1 L/min to 1.9 L/min.With the increase of control frequency,the flow adjustable interval of high speed on-off valve decreases.When the control frequency reaches 40 Hz,the flow rate of the high speed on-off valve is almost unmodulated.

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陈楠,魏汝路,谢方伟.高速开关阀阀芯频响及流量输出特性研究[J].机床与液压英文版,2024,52(19):159-164.

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History
  • Received:
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  • Online: October 23,2024
  • Published: October 15,2024
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