336, 336 GC and 340 Excavator Systems Caterpillar


Accumulator (Pilot)

Usage:

336 DKS

主控制阀蓄能器



图 1g06198761
(1) 蓄能器
(2) 上部先导油歧管

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 (1) 会向先导系统提供加压先导油。 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:

  • 当发动机停机并且停止向主控制阀供油时,机具降下

  • 组合作业


图 2g06199181
蓄能器
(1) 蓄能器
(2) 上部先导油歧管
(3) 气室
(4) 蓄能囊
(5) 压油室
(6) 油道

先导油流经先导油歧管 (2) 的油道 (6)。 然后,机油流入压力油室 (5)。 先导油作用在蓄能囊 (4) 上,气室 (3) 中的氮气受到压缩。

泵执行器蓄能器



图 3g06281314
(1) 主控制阀
(2) 单向阀
(3) 蓄能器
(4) 泵执行器


图 4g06281388
(1) 主控制阀
(2) 单向阀
(3) 蓄能器
(4) 泵执行器

提供泵执行器的蓄能器位于主控制阀下方。 先导油从主控制阀 (1) 通过单向阀 (2) 流入蓄能器 (3)。 油同时流入泵电磁阀 (4)。 启动时,泵电磁阀向泵执行器供应先导油,以加大泵冲程。 储存在蓄能器中的油可确保执行器始终有足够的油来加大泵冲程。 单向阀 (2) 确保来自该蓄能器的油仅供应给泵。

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