Piston Pump (Implement and Steering)
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| 图 1 | g01288061 |
典型液压泵 (1) 泵驱动轴 (2) 活塞 (3) 偏置弹簧 (4) 活塞筒 (5) 来自液压油箱的进油口 (6) 斜盘 (7) 滑垫 (8) 伸缩板 (9) 控制活塞 (10) 至组合阀的出油口 (11) 泵控制阀 | |
机具和转向泵是一个可变排量轴向活塞泵。
机具和转向泵有九只活塞 (2) 。 当驱动轴 (1) 转动时，活塞筒 (4) 、滑垫 (7) 和伸缩板 (8) 也会转动。 活塞的端部连接至滑垫上。 斜盘 (6) 不转动。 斜盘的每侧上有一个轴承轴颈。 这两个轴承轴颈在轴承内，用于允许斜盘移动。 油流经活塞内的油道对泵的内部部件进行润滑。
当斜盘 (6) 处于最大角度并且驱动轴 (1) 转动时，活塞 (2) 在活塞筒 (4) 内移入和移出。 当活塞从活塞筒中移出时，活塞将会在进油口 (5) 处产生真空。 液压油箱的压力将油推入进油口。 油在流过进油口后流入活塞筒的活塞孔中。 随着活塞筒的继续转动，当滑垫上旋斜盘 (6) 的角度时，活塞就被推入到活塞筒中。 活塞将油从活塞孔推过泵出油口 (10) ，然后推入组合阀。
当发动机运转时，泵就产生油流以满足以下条件：
- 转向系统的需求
- 泵的补偿压力
- 液压机具的需求
- 泵部件的内部润滑
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