影响卸荷阀卸荷频率和负载端压力因素的仿真分析

Influence Factors Simulation of Electromagnetic Unloading Valve Unloading Frequency and Load-end Pressure

电磁卸荷阀作为乳化液泵站中压力控制和过载保护的关键元件,对确保液压支架可靠工作,实现井下安全生产起到重要作用。为确保安全生产,常使机械式卸荷做为电磁式卸荷的备用方式运行。但经企业试验发现,当卸荷阀处于机械式卸荷工况下,卸荷阀寿命较短,且系统平稳性较差。AMESim仿真表明:卸荷阀出口背压和主阀半锥角主要影响卸荷频率;导阀座直径主要影响卸荷频率和负载端压力波动范围。故合理选择出口背压、主阀半锥角和导阀座直径对泵站的节能减震均有一定帮助。

The electromagnetic unloading valve was selected as the key parts for pressure control and overload protection in the emulsion pump station.It plays an important role in ensuring the stability of hydraulic support and safety production.In order to ensure safe production,mechanical unloading is often used as the standby mode of electromagnetic unloading.Enterprise test found that the valve life and the system stability had been substantially limited if the unloading valve is under the mechanical unloading mode.In this paper,the influence of unloading frequency and load-end pressure are carried out by using AMESim software.The result indicate that back pressure of unloading valve and half-cone angle of main valve mainly affect the unloading frequency;pilot valve seat diameter affect the unloading frequency and load-end pressure.So reasonable selection of back pressure,main valve half-cone angle and pilot valve seat diameter is helpful for energy-saving and damping of pump station.