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为了提高高压大流量液压系统卸荷过程中的快速性和平稳性以及降低在卸荷过程中系统的液压冲击,对液压系统卸荷机理进行了理论分析和研究,分析了体积增量均匀释放原则卸荷方法,根据评判卸荷优劣的两个准则——快速性和平稳性,从理论上提出一种基于体积增量均匀释放原则的高压大流量液压系统卸荷方法,通过对系统相关元件的特性分析,推导出卸荷阀芯开启控制曲线。通过仿真将基于体积增量均匀释放原则的卸压阀阀芯开启位移控制曲线与传统控制曲线下的液压卸荷效果进行对比,仿真结果表明,基于体积增量均匀释放原则的卸荷方法卸荷平稳性好,卸荷效果优越,有效地降低了卸荷时的液压冲击,验证了新方法的优越性。
In order to improve the quickness and stability during the unloading process of high pressure and high flow hydraulic system and to reduce the hydraulic impact during unloading, the unloading mechanism of hydraulic system is theoretically analyzed and studied. The principle of uniform volume increment is analyzed Unloading method, according to the evaluation of the two principles of unloading good and bad - fastness and stability, a theoretically based on the principle of uniform volume increment release of high-pressure high-flow hydraulic system unloading method, through the system-related components Analysis of the characteristics, derived unloading spool open control curve. Through the simulation, the open displacement control curve of the relief valve based on the principle of uniform volume increment is compared with the hydraulic relief effect under the traditional control curve. The simulation results show that the unloading method based on the principle of uniform volume increment release Good stability, excellent unloading effect, effectively reducing the hydraulic impact during unloading, and verify the superiority of the new method.