Check Valve (Return Makeup)
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| 图 1 | g01470080 |
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主控制阀室的俯视图 (5) 补给管路 (10) 主控制阀 (17) 低速回油单向阀 (29) 机油冷却器进口管路 (33) 机油冷却器回油管路 | |
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| 图 2 | g01470092 |
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低速回油单向阀和旁通单向阀 (5) 补给管（流向回转马达的补充机油） (16) 回油管 (17) 低速回油单向阀 (24) 旁通单向阀 (28) 单向阀 (30) 旁通单向阀回油管 | |
低速回油单向阀 (17 ) 内置在单向阀 (28) 中。 低速回油单向阀 (17) 位于回油回路的主控制阀和液压油箱之间。 低速回油单向阀限制回油流量。 此限制使回油管 (16) 和补给管 ( 5) 中的压力升高。
如果回转马达出现气穴，机油从回油管 ( 16) 流入补给管 (5)。 这部分补偿油供至回转马达进口，以防止回转马达出现气穴。
注: 有关补给操作的更多信息，请参阅 系统操作, "机油补偿（回转系统） "。
流过低速回油单向阀 ( 17) 的回油流量分流到两条流路。 一部分机油经过进口油管 ( 29) 流向液压油冷却器。 液压油冷却器流出的冷却油经过回油管路 ( 33) 流进液压油箱中的回油滤清器。 剩余的机油从低速回油单向阀 ( 17)流过旁通单向阀 ( 24) 和回油管路 (33)，流入回油滤清器，然后流向液压油箱。
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