乳化液泵用以采煤工作面，为液压支架出示乳化油，原理靠发动机曲轴的转动推动活塞杆做往复运动，完成吸液管和出液。径向柱塞泵是活塞杆或柱塞的往复运动方位与发动机缸体管理中间轴平行面的柱塞泵。径向柱塞泵运用与转动轴平行面的柱塞在柱塞孔壁往复运动所造成的容量转变来开展工作中的。因为柱塞和柱塞孔全是环形零件，生产加工时能够做到很高的精密度相互配合，因而容量的效率高。
美国威格士VICKERS柱塞泵
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