力士乐柱塞泵 A10VSO71DFLR/31R-PPA12N00
柱塞泵柱塞往复运动总行程L是不变的，由凸轮的升程决定。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。供油开始时刻不随供油行程的变化而变化。转动柱塞可改变供油终了时刻，从而改变供油量。柱塞泵工作时，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两个阶段。
进油过程
当凸轮的凸起部分转过去后，在弹簧力的作用下，柱塞向下运动，柱塞上部空间（称为泵油室）产生真空度，当柱塞上端面把柱塞套上的进油孔打开后，充满在油泵上体油道内的柴油经油孔进入泵油室，柱塞运动到下止点，进油结束
回油过程
柱塞向上供油，当上行到柱塞上的斜槽（停供边）与套筒上的回油孔相通时，泵油室低压油路便与柱塞头部的中孔和径向孔及斜槽沟通，油压骤然下降，出油阀在弹簧力的作用下迅速关闭，停止供油。此后柱塞还要上行，当凸轮的凸起部分转过去后，在弹簧的作用下，柱塞又下行。此时便开始了下一个循环。柱塞泵以一个柱塞为原理介绍，一个柱塞泵上有两个单向阀，并且方向相反，柱塞向一个方向运动时缸内出现负压，这时一个单向阀打开液体被吸入缸内，柱塞向另一个方向运动时，将液体压缩后另一个单向阀被打开，被吸入缸内的液体被排出。这种工作方式连续运动后就形成了连续供油 。
A10VSO系列 液压变量柱塞泵
936130 A10VSO28DFLR/31R-PPA12N00
936062 A10VSO28DFLR/31R-PPA12N00
936059 A10VSO28DFLR/31R-PPA12N00
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939026 A10VSO28DFLR/31R-PPA12N00
903160 A10VSO28DFR/31R-PPA12N00
926318 A10VSO28DFR1/31R-PPA12K01
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907919 A10VSO28DR/31R-PPA12K01
903163 A10VSO28DR/31R-PPA12N00
936910 A10VSO45DFLR/31R-PPA12N00
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936739 A10VSO45DFLR/31R-PPA12N00
935975 A10VSO45DFLR/31R-PPA12N00
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911010 A10VSO45DFR/31R-PPA12K26
939183 A10VSO45DFR/31R-PPA12N00
927068 A10VSO45DFR1/31R-PPA12K02
908725 A10VSO45DFR1/31R-PPA12N00 力士乐Rexroth
907403 A10VSO45DR/31R-PPA12N00
944067 A10VSO71DFLR/31R-PPA12N00
944730 A10VSO71DFLR/31R-PPA12N00
942654 A10VSO71DFLR/31R-PPA12N00 力士乐Rexroth
944502 A10VSO71DFLR/31R-PPA12N00
948790 A10VSO71DFLR/31R-PPA12N00
961216 A10VSO71DFLR/31R-PPA12N00
944440 A10VSO71DFR1/31R-PPA12N00 力士乐Rexroth
945133 A10VSO71DR/31R-PPA12N00
936207 A10VSO100DFLR/31R-PPA12N00
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936790 A10VSO100DFLR/31R-PPA12N00
934823 A10VSO100DFLR/31R-PPA12N00
944032 A10VSO100DFLR/31R-PPA12N00
943468 A10VSO100DFLR/31R-PPA12N00 力士乐Rexroth
939643 A10VSO100DFR/31R-PPA12N00
927083 A10VSO100DFR1/31R-PPA12K02
922744 A10VSO100DFR1/31R-PPA12N00
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936094 A10VSO140DFLR/31R-PPB12N00
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943841 A10VSO140DFLR/31R-PPB12N00
939192 A10VSO140DFR/31R-PPB12N00
927126 A10VSO140DFR1/31R-PPB12K02
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922983 A10VSO140DR/31R-PPB12N00
932852 A10VSO140DRG/31R-PPB12N00
945179 A10VSO71DFR/31R-PPA12K27
942635 A10VSO71DFR/31R-PPA12N00 力士乐Rexroth
947872 A10VSO71DFR1/31R-PPA12K02
948654 A10VSO71DFLR/31R-PPA12N00
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