A11VLO260LE4S5/11R-NSD12K07-S油泵河北秦皇岛

A11VLO260LE4S5/11R-NSD12K07-S油泵河北秦皇岛柱塞泵的工作原理

   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。
A11VLO260LE4S5/11R-NSD12K07-S油泵河北秦皇岛河北秦皇岛A11VLO260LE4S5/11R-NSD12K07-S
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临界流文丘利喷嘴的基本原理1.原理临界流文丘利喷嘴是个孔径逐渐减小的流道，孔径小的部分称为喉部，在喉部的后面有孔径逐渐扩大的流道。喷嘴可随着其下游扩大管长度的不同可得到不同的临界压力比，大可以达到.9。当气流通过喉部时气流速度可达到音速，此时马赫数等于1，流量只与上游压力有关（与下游压力无关），流出系数只与雷诺数有关。所以适合于作为气体流量计量标准使用。数学模型在理想条件下，理论上可以导出喷嘴的质量流量q为q=AC式中：A喷嘴喉部的内截面积；R气体常数；C理想条件下的临界流函数。

以上型号不全~可咨询~