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德国REXROTH液压泵4WRA10E1-60-22/G24K4/V
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上海维特锐实业发展有限公司
上海市普陀区中江路889号曹杨商务大厦1501-1502室
TEL: 吴振娅
:2892606680 1243547246
Email:2892606680@.com
http://www.hydac-china.com
REXROTH液压泵0510225006 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绍，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 。采用补油泵供油的柱塞泵，使用3000h后，操作人员每日需对柱塞泵检查1-2次，检查液压泵运转声响是否正常。如发现液压缸速度下降或闷车时，就应该对补油泵解体检查，检查叶轮边沿是否有刮伤现象，内齿轮泵间隙是否过大。对于自吸油型柱塞泵，液压油箱内的油液不得低于油标下限，要保持足够数量的液压油。液压油的清洁度越高，液压泵的使用寿命越长。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*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。柱塞泵使用寿命的长短，与平时的维护保养，液压油的数量和质量，油液清洁度等有关。避免油液中的颗粒对柱塞泵磨擦副造成磨损等，也是延长柱塞泵寿命的有效途径。在维修中更换零件应尽量使用原厂生产的零件，这些零件有时比其它仿造的零件价格要贵，但质量及稳定性要好，如果购买售价便宜的仿造零件，短期内似乎是节省了费用，但由此出带来了隐患，也可能对柱塞泵的使用造成更大的危害。
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