力士乐A4V,A10V,A11V系列柱塞泵，德国REXROTH轴向柱塞泵

力士乐变量轴向柱塞泵分类：按轴分类有:直轴，斜轴，通轴，不通轴  按配油形式有:平面配流，轴配流，阀配流其工作原理都是柱塞往复运动实现吸油和压油动作。  通过配流零件保证吸油区与压油区分隔开，不串通常用的有1，CY14-1B柱塞泵，其主要结构特征是：不通轴，直轴，平面配流盘配流，斜盘变量结构。              2，A6F斜轴泵（力士乐系列），其主要结构特征是：斜轴，不通轴，平面配流，斜盘固定，缸体配流盘摆动变量。             3，A4V通轴泵（力士乐系列），其主要结构特征是：通轴，直轴，平面配流盘配流，斜盘变量结构，尾部可串接1-4台合适的通轴泵。可集成液压系统的*控制阀功能。            详细结构请参阅相关资料，网上也有。            柱塞泵特点：压力等级高，可实现复杂的变量控制，可组成复杂的液压系统。           像一般的水泵多数采用叶轮离心作用出水，但高压水泵一般多是阀配流的柱塞泵，压力可达到
柱塞泵是液压系统的一个重要装置。它依靠柱塞在缸体中往复运动，使密封工作容腔的容积发生变化来实现吸油、压油。柱塞泵具有额定压力高、结构紧凑、效率高和流量调节方便等优点，被广泛应用于高压、大流量和流量需要调节的场合，诸如液压机、工程机械和船舶中。
柱塞泵是往复泵的一种，属于体积泵，其柱塞靠泵轴的偏心转动驱动，往复运动，其吸入和排出阀都是单向阀。当柱塞外拉时，工作室内压力降低，出口阀关闭，低于进口压力时，进口阀打开，液体进入；柱塞内推时，工作室压力升高，进口阀关闭，高于出口压力时，出口阀打开，液体排出。当传动轴带动缸体旋转时，斜盘将柱塞从缸体中拉出或推回，完成吸排油过程。柱塞与缸孔组成的工作容腔中的油液通过配油盘分别与泵的吸、排油腔相通。变量机构用来改变斜盘的倾角，通过调节斜盘的倾角可改变泵的排量。
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。
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。

力士乐A4V柱塞泵变量原理就是通过LS（负载敏感）来控制,当执行元件压力变化时,LS把执行元件的压力情况反馈给泵上的LS阀,LS阀给力士乐A4V柱塞泵变量泵里的柱塞施加压力,改变斜盘的角度,从而实现变量.当系统有多个执行元件时,取压力zui大的执行元件
变量泵的变量控制我知道的一般有两种形式，1：电控；2液控。电控大多采用电比例信号控制比例阀的开口量，通过变量油缸从而改变斜盘角度达到变量目的。液控形式与电控原理没有本质区别。只是阀的控制形式改为液控。亦称LS。有随动伺服的也有压力反馈控制的。
部分型号，如有什么需要或疑问可来电垂询，谢谢合作！
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力士乐A4V,A10V,A11V系列柱塞泵，德国REXROTH轴向柱塞泵