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液控单向阀在液压系统中可做为普通单向阀使用，也可通过先导控制压力，使控制活塞推开单向阀芯实现油流的反向流动。 简式液控单向阀的结构见图１所示。当油流沿ＰＡ（正向进油腔）和ＰＢ（正向出油腔）方向流动时，与普通单向阀的功能完全一样。当油液从ＰＢ腔反向进入时，由
Hydraulic check valve in the hydraulic system can be used as a normal one-way valve can also be pilot-controlled pressure, the control piston to open the one-way valve spool to reverse the flow of oil. Simplified liquid-controlled check valve structure shown in Figure 1. When the flow of oil along the PA (forward into the oil chamber) and PB (forward to the oil chamber) direction, and the normal one-way valve function exactly the same. When the oil from the PB cavity into the reverse, from