通过减小腔内回流比例、增大正反方向流阻差，提高泵液效率与输出泵压、减小输出脉动。
By reducing the reverse flow in chamber and by increasing resistance difference of back-and-forth flow, higher efficiency, higher pressure and less output fluctuation could be expected.
停机时，防止泵内的水回流到设备内；
When engine off, prevents in pump's water backflow to the equipment in;
数值结果表明，蜗壳内的速度场以及压力场分布相对比较均匀，在隔舌和扩散段内存在一定的回流和涡流，但并不影响泵的良好性能和高效率。
The results show the distributions of the velocity field and pressure field, especially for the flow in laryngeal and diffuse part. There are refluence on...
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