374F Excavator Hydraulic System Caterpillar


General Information (Return System)

Usage:

374F L AP4

回油液压系统

来自前泵和后泵的输油进入主控制阀。 随后,油按照下述方式流向液压油箱上的回油油道。

当所有操纵手柄和/或行驶操纵杆/踏板处于空档位置时,泵低压备用油从前泵经内部油道和旁通切断滑阀流向回油油道。 泵低压备用油从后泵经过内部油道和旁通切断滑阀流向回油油道。 回油从回油油道流过低速回油单向阀、液压油冷却器回到液压油箱。

当任意操纵手柄和/或行驶操纵杆/踏板从空档位置移开时,旁通切断滑阀移向闭合位置。 随后,泵油引导至油缸和/或马达。 此时,来自油缸和/或马达的回油流过油缸至油箱滑阀或马达至油箱滑阀,回到内部油道。 回油从回油油道流过低速回油单向阀、液压油冷却器回到液压油箱。

回油系统的其他部件包括:

  • 低速回油单向阀

  • 旁通单向阀

  • 液压油冷却器

  • 液压油箱和滤清器

  • 箱体排油滤清器

注: 请参阅本手册中的相应章节,了解更多信息。

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