力士乐轴向柱塞变量泵A10VSO140DFR1/31R-PPB12N00

柱塞泵

低等缺点。国际上70、80年代发展的轴配流径向柱塞泵克服了阀配流径向柱塞泵的不足。由于径向泵结构上的特点，固定了轴配流径向柱塞泵比轴向柱塞泵耐冲击、寿命长、控制精度高。变量行程短泵的变量是在变量柱塞和限位柱塞作用下，改变定子的偏心距实现的，而定于的最大偏心距为 5—9mm（根据排量大小不同），变量行程很短。且变量机构设计为高压操纵，由控制阀进行控制。故该泵的响应速度快。径向结构设计克服了如轴向柱塞泵滑靴偏磨的问题。使其抗冲击能力大幅度提高。

液压式

液压柱塞泵靠气压供油的液压油箱，在每次启动机器后，必须等液压油箱达到使用气压后，才能操作机械。直轴斜盘式柱塞泵分为压力供油型的自吸油型两种。压力供油型液压泵大都采用有气压的油箱，也有液压泵本身带有补油分泵向液压泵进油口提供压力油的。自吸油型液压泵的自吸油能力很强，无需外力供油。

2结构形式

柱塞泵分为轴向柱塞泵和径向柱塞泵两种代表性的结构形式；柱塞缸由于径向柱塞泵

泵是输送液体或使液体增压的机械。它将原动机的机械能或其他外部能量传送给液体，使液体能量增加。泵主要用来输送水、油、酸碱液、乳化液、悬乳液和液态金属等液体，也可输送液、气混合物及含悬浮固体物的液体。泵通常可按工作原理分为容积式泵、动力式泵和其他类型泵三类。除按工作原理分类外，还可按其他方法分类和命名。如，按驱动方法可分为电动泵和水轮泵等；按结构可分为单级泵和多级泵；按用途可分为锅炉给水泵和计量泵等；按输送液体的性质可分为水泵、油泵和泥浆泵等。按照有无轴结构，可分直线泵，和传统泵

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