衬胶泵的结构类型很多，其中，外混式衬胶泵的工作原理是：水泵启动前先在泵壳内灌满水（或泵壳内自身存有水）。启动后叶轮高速旋转使叶轮槽道中的水流向涡壳，这时入口形成真空，使进水逆止门打开，吸入管内的空气进入泵内，并经叶轮槽道到达外缘。另一方面，被叶轮排到气水分离室中的水又经左右回水孔流回到叶轮外缘。左回水孔流回的水在在压力差和重力的作用下，射向叶轮槽道内，并被叶轮击碎，与吸入管路来的空气混合后，甩向蜗壳，真空泵 液下泵计量泵齿轮泵耐腐蚀泵 耐酸泵消防泵向旋转方向流动。然后与右回水孔流来的水汇合，顺着蜗壳流动。由于液体在蜗壳内不断冲击叶栅，不断被叶轮击碎，就同空气强烈搅拌混合，生成气水混合物，并不断地流动致使气水不能分离。混合物在蜗壳出口被隔舌剥离，沿短管进入分离室。在分离室内空气被分离出来，由出口管排掉，而水仍经左右回水孔流向叶轮外缘，并与吸入管空气相混合。如此反复循环，逐渐将吸入管路中的空气排尽，使水进入泵内，完成自吸过程。,2PNJB,2PNJB,2PNJB,2PNJB,2PNJB,2PNJB,2PNJB,2PNJB,2PNJB,2PNJB,2PNJB,2PNJB,2PNJB,2PNJB,2PNJB,2PNJB,2PNJB,2PNJB,2PNJB,2PNJB,2PNJB,2PNJB,2PNJB,2PNJB,2PNJB,2PNJB,2PNJB,2PNJB,2PNJB,2PNJB,2PNJB,2PNJB
