Accumulator (Pilot)
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| 图 1 | g03353467 |
先导歧管和蓄能器（位于主控制阀下面） (1) 线路 (2) 进气 (3) 蓄能器 (4) 先导歧管 | |
蓄能器储存用于主控制阀的先导压力油。 在一些操作过程中。由于先导泵供应的流量不足，先导系统需要更多的机油。 当先导泵流量不足时，蓄能器 (3) 会向先导系统提供先导压力油。 向先导系统供应的先导油不充足，可能是由以下两个原因引起的：
- 当发动机停机并且至主控制阀的供油停止时，机具降下。
- 组合作业
在蓄能器 (3) 中，气室周围有蓄能囊环绕。 气室充满氮气。 管路 (1) 中的先导油从进口 (2) 进入压油室。 先导油作用在蓄能囊上，气室中的氮气受到压缩。 单向阀防止储存在蓄能器中的机油反向流动。 储存的机油仅用于运行控制阀杆。
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