武汉华美液压气动设备有限公司:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" />
李志龙
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CTR3-075/M3A/GP2-0140/D11N
是为液压传动提供加压液体的一种液压元件，是泵的一种。它的功能是把动力机(如电动机和内燃机等)的机械能转换成液体的压力能。图中为单柱塞泵的工作原理。凸轮由电动机带动旋转。当凸轮推动柱塞向上运动时，柱塞和缸体形成的密封体积减小，油液从密封体积中挤出，经单向阀排到需要的地方去。当凸轮旋转至曲线的下降部位时，弹簧迫使柱塞向下，形成一定真空度，油 箱中的油液在大气压力的作用下进入密封容积。凸 轮使柱塞不断地升降，密封容积周期性地减小和增 大，泵就不断吸油和排油。CTR3-035/P3/GP2-0113/C410N
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P257-G63467HBX 6/G32MIG泊姆克齿轮泵厂家P3100A586ADPN20-14泊姆克齿轮泵厂家
第二，只需改变柱塞的工作行程就能改变流量，易于实现变量；
第三，柱塞泵中的主要零件均受压应力作用，材料强度性能可得到充分利用。CTR3-035/M7.5A/GP2-0113/A00N
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变量柱塞泵的压力油经泵体、泵壳变量壳体中的通油孔通过单向阀进入变量壳体的下腔，当拉杆向下运动时，推动伺服活塞向下移动，伺服阀的上阀口打开，变量壳体下腔的压力油经变量活塞中的通油孔进入变量壳体上腔，由于上腔面积大于下腔，液压力推动活塞向下运动，带动销轴使变量头绕钢球中心旋转，改变变量头的倾斜角（增大），柱塞泵的流量随之增大。反之拉杆向上运动，变量头的倾斜角向相反方向变化，泵的流量也随之变化。当倾斜角度变至零以后，则变量头向负偏角方向变化，液流产生换向，泵的进出油口变换。CTR0-008/M0.37A/1P-3.3R/A11N
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