D3FPE50YB9HB7039P80派克伺服阀

伺服阀属于两级阀，第一级为喷嘴档板式，由控制信号控制其出口压力，第二级为滑阀式，执行控制级至刹车缸的压力。当无信号作用时， 由於压力喷嘴出口油压力的作用，使伺服阀挡板靠在回油喷嘴上，此时压力口的油压作用在滑阀阀芯上，使刹车口同计量油口直接连通，刹车口压力同飞行员控制的计量油压相等，当机轮角速度检测到滑行速度同基准滑行速度有偏差时，力矩马达接收到偏差电信号，此时力矩马达驱动档板向压力喷嘴偏转，使作用在阀芯上端油压下降，在阀芯下端油压作用下，阀芯上移，关小计量压力油口，这将导致控制口压力降低，控制口压力降低到某一值时，就有对应的制动压力。

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