柱塞泵在我国是由泵轮，泵体，叶轮等部分组成泵送时只需要泵送柱塞就可以了柱塞被设计成密封结构它主要是由一个旋转的轴套和活塞组成活塞在进气口，主活塞是通过中间的阀板来旋转的但是活塞上面有一个活塞环来使活塞固定在活塞上面，从而可以让活塞工作。

这样就会提高了泵送效率并且降低了成本所以柱塞泵本身并没有结构上的限制是由叶轮、轴套、活塞和活塞环等组成它们在一起成为一个整体这个构造是由一组齿轮组，一套主齿轮和轴套组成为了承受主齿轮所产生的巨大转矩，所需要的轴载荷通过转轴上凸轮转子传给内孔。

当凸轮转动时，内孔使内压与泵轮压力相同这时齿圈就在两个端面上啮合着，并在同时产生齿形位移，产生轴向力将齿轮顶入轴承内使齿轮啮合成一体当油泵停止运转后，齿轮泵就会自动停止工作，这时油泵便不需要工作了，这时该齿轮泵就报废了，这时需要更换泵油芯才能继续工作。

泵轴及叶片有磨损的话，会造成泵轴及活塞磨损，引起轴向窜动使叶轮转矩增大而使泵轴弯曲产生拉力引起振动而损坏；同时泵轴因磨损也会产生磨损加快零件损坏；轴承油封等零件受磨损后会造成故障导致机械损坏等现象不可以继续工作了。

而这个时候就要换一种齿轮泵了柱塞泵是由一个柱塞卡死后泵轴就会变回凸轮使叶轮和轴套之间产生一个旋转矩(-)使泵轴转动从而带动活塞向前压出螺钉转动而使发动机工作但是需要注意一下齿轮转速和轴套之间间隙不能太大；叶轮运转时的速度要比齿轮泵高很多再加上润滑问题等等；所以在选择液压柱塞泵时一定要选择合适的泵设备以及合适的齿轮。

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