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三个阶段。
A10VSO28DR/31R-PSC12N00
A10V028DR/31R-PSC62K01
A10V028DFR1/31R-PSC62N00
A10VSO28DR/31L/PPA12G20
A10V028DFR/31L-PSC12K01
A10VSO45DFR1/31R-PPA12N00
A10VSO45DFR1/32R-VPB12N00
A10VSO45DR/31R-PPA12N00
A10VSO45DR/31R-PPA12K25
A10VSO45DFR1/31R-PPA12N00
A10VSO58DFR1/31R-PPA12N00
A10VSO45DFR1/31RPPA12N00
E-A10VSO45DFR1/31R-PPA12N00
A10VSO45DFR/31R-PPA12N00-SO32
A10VSO45DR/31R-PPA12N00
A10VSO45DR/52R-PC12N00
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
A10V045DFR1/31R-PSC62K02
A10VSO45DFR1/31R-PPA12N00
A10VSO45DR/31RPPB12N00
A10V045DFR1/31R-PSC62K02
A10VSO71DFR1/32R-VPB22U99
A10VSO71DFR1/31R-PPA12N00
A10VSO71DFR1/32R-VPB12N00
A10VSO71DFR1/31R-PPA12KB5
A10VSO71DFR/31R-PSC62K07
A10V071DFRI/34 PSC6402-SO225
A10VSO71FR1/31R-PPA12N00
A10VSO71DFR1/31R-PPB12N00
A10VSO71DFR1/31R-PPA12N00
A10VSO71DFR1/31R-PSC62K07
A10VSO71DFR/31R-PPA12KB3
A10VSO71DR/31R-PPA12N00
A10VSO71DFR/31R-PPA12N00
A10VSO71DFR1/31R-PPA12N00
A10VSO71DFR1/31R-PPA12N00
A10VSO71DFR1/32R-VPB22U99
E-A10VSO71DR/31R-PPA12N00
A10VSO100DR/31R-PPA12N00
A10VSO100DR/32R-VPB22U99
A10VSO100DFR1/32R-VPB12N00
A10VSO100DFR1/31R-PPA12K
A10VSO100DFR1/31R-PPA12KB3
E-A10VSO100PFR1/31R-PPA12N00
A10VSO100DFR/31RPSB12K24
A10VSO100DR/31R-VPA12N00
A10VSO100DR/31R-PPA12N00
A10VSO100DFR1/31R-PPA12N00
A10VSO100DFR1/32R-VPB12N00
A10V0100DR/31R-PSC11N00
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，
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 。
A10VSO100DR/31R-PTA12N00
A10VSO100DR/31R-PPA12N00
A10VSO100DFR1/32R-VPB12N00
A10VSO140DFR1/31R-PPB12N00
A10VSO140DFLR1/31R-PPB12K01
A10VSO140DR/31R-PPB12N00
E-A10VSO140DFR1/31R-PPA12N00
A10VSO140DFR1S/31RPPB12N00
A10VSO140DFR1/31R-PPB12N00
A10VSO140DFLR/31R-PPB12N00
A10VSO140DR/31R-PPB12N00
A10VSO140DRS/32R-VPB12N00
E-A10VSO140D/31R-PPB12N00
A10VSO140DFR1/31R-PPB12N00
A10VSO140DR/32R-VPB12N00
AE-A10VSO140D/31R-PPB12N00
A10VSO140DR/31R-PPB12N00
A10VSO140DRS/32R-VPB12N00
A10VSO140DFR1/31R-PPB12N00
A10VSO140DFR1/32R-VPB12N00
A10VSO140DRS/32R-VPB12N00
柱塞泵重要的部件是轴承，
如果轴承出现游隙，则不能
保证液压泵内部三对磨擦副的
正常间隙，同时也会破坏各
磨擦副的静液压支承油膜厚度，
降低柱塞泵轴承的使用寿命。
据液压泵制造厂提供的资料，
轴承的平均使用寿命为10000h，
超过此值就需要更换新口。
拆卸下来的轴承，没有专业
检测仪器是无法检测出轴承的
游隙的，只能采用目测，
如发现滚柱表面有划痕或变色，
就必须更换
