美国威格士VICKERS柱塞泵 叶片泵2520V21A12-1CC22R 2520V21A12-1DD22R

由于上腔面积大于下腔，液压力推动活塞向下运动，带动销轴使变量头绕钢球中心旋转，改变变量头的倾斜角（增大），柱塞泵的流量随之增大。反之拉杆向上运动，变量头的倾斜角向相反方向变化，泵的流量也随之变化。当倾斜角度变至零以后，则变量头向负偏角方向变化，液流产生换向，泵的进出油口变换。

美国威格士VICKERS柱塞泵

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