液控单向阀在锁紧回路中的控制特性研究

摘要

Aiming at the different installation positions of hydraulic control one-way valve in hydraulic locking circuit,based on the analysis to the opening necessary conditions and the opening control pressure under different working conditions of hydraulic control one-way valve,the idea was put forward that opening pressure of hydraulic control one-way valve was maximum when the hydraulic oil went into the chamber without rod,backed to the chamber with rod and the hydraulic cylinder subjected to reversed load. The relation between control pressure and the load of the hydraulic cylinder,the relation between structure parameters M of hydraulic control valve, the speed ratioφof hydraulic cylinder and oil resistanceΔp were described. Speed ratioφof the hydraulic cylinder is bigger,the open-ing pressure is greater;the structure parameter M of the hydraulic control one-way valve is larger,the opening pressure is smaller.%针对液控单向阀在液压锁紧回路中的不同安装位置，在分析不同工况下液控单向阀开启的必要条件和开启工作时的控制压力的基础上，提出液压缸无杆腔进油、有杆腔回油且液压缸承受反向负载时液控单向阀开启压力最大的理念，阐述了控制压力与液压缸的负载、液控单向阀的结构参数M、液压缸的速比φ和回油阻力Δp的关系，从而得出液压缸的速比φ越大、开启压力越大，液控单向阀的结构参数M越大、开启压力越小的结论。