当柱塞泵开始工作时，柱塞在泵轴的驱动下开始往复运动。在柱塞向后运动的过程中，缸体内的容积逐渐增大，

形成了一定的负压，这使得外界液体得以通过进口单向阀被吸入缸体。而当柱塞向前运动时，缸体内的容积减小

，液体被压缩，压力逐渐升高。当这个压力超过出口单向阀的开启压力时，液体便被推出泵体，完成了整个泵送

过程。

这个过程看似简单，却蕴含了丰富的机械原理和工程智慧。柱塞的往复运动，不仅实现了液体的连续泵送，而且

通过调节柱塞的运动速度和行程，还可以实现对泵送流量的精确控制。此外，柱塞泵还采用了多种密封措施，确

保在高压环境下也能保持良好的密封性能，防止液体泄漏。

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