柱塞泵，是由电动机提供泵的动力，经鼓型齿联轴器带动减速机转动。由减速机减速带动曲轴旋转。通过曲柄连杆机构，将旋转运动转变为十字头和柱塞为往复运动。当柱塞向后死点移动时，泵容积腔逐步增大，泵腔内压力降低，当泵腔压力低于进口压力时，吸入阀在进口端压力作用下开启，液体被吸入；当柱塞向前死点移动时，泵腔内压力增大，此时吸入阀关闭，排出阀打开，液体被挤出液缸，达到了吸入和排出的目的。
工作时，在喷油泵凸轮轴上的凸轮与柱塞弹簧的作用下，迫使柱塞作上、下往复运动，从而完成泵油任务，泵油过程可分为以下三个阶段。
结论：通过上述讨论，得出下列结论
① 柱塞往复运动总行程L是不变的，由凸轮的升程决定。
② 柱塞每循环的供油量大小取决于供油行程，供油行程不受凸轮轴控制是可变的。
③ 供油开始时刻不随供油行程的变化而变化。
④ 转动柱塞可改变供油终了时刻，从而改变供油量。
德国力士乐A10VSO71DFR1/32R-VPB22U99柱塞泵货期短价格低
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德国力士乐A10VSO71DFR1/32R-VPB22U99柱塞泵货期短价格低
