液控单向阀是各种工程机械液压平衡(锁紧)回路中,使用十分广泛的一种元件。在生产实践中,经多起故障分析和处理发现,故障的产生原因主要是液控单向阀的使用不当所致。现以立式液压缸平衡回路为例,说明使用液控单向阀组成液压平衡回路时应注意的几个问题。 1 液控单向阀最低控制压力的确定 液控单向阀的工作原理,如图1所示。油液从A口到B口可自由通过;但从B口到A口则截止。当需要油液由B口向A口流动时,需在控制口C施加控制压力这Pc,控制压 Hydraulic check valve is a variety of engineering machinery hydraulic balance (locking) circuit, the use of a very wide range of components. In production practice, after many failure analysis and treatment found that the main reason for the failure of the pilot-operated check valve due to improper use. Vertical hydraulic cylinder is now balanced circuit, for example, illustrates the use of liquid-controlled check valve hydraulic balance circuit should pay attention to several issues. 1 pilot check valve to determine the minimum control pressure pilot check valve works, shown in Figure 1. Oil from port A to port B can be freely passed; but from port B to port A is closed. When the need for oil flow from port B to port A, the control port C to be applied to control the pressure of this Pc, control pressure