250HW-8混流泵-混流泵-金石泵业

混流泵

（二）泵盖是泵与进水管相连的零件，其端面与叶轮之间留有规定的轴向端面间隙（在消除轴承轴向活动间隙以后，保持规定的轴向间隙）。间隙过小产生磨擦，过大则会导致泵内压力水回流，250HW-8混流泵，使泵的效率降低，通过增减调整纸垫达到规定的间隙。

II.  Pump cover is

the part connected with water inlet pipe.There is an stated axial end face gap

between its end

face and

impeller(Keep the stated axail gap after removing the bearing axial movable

gap).Friction will be

produced if

the gap is too small， contrary， if the gap is too large， the pressure water in

pump will reflux which

makes the

feeiciency reduced.Adjust the paper washer and make the gap be stated one.

（一）HW型混流泵由泵体、泵盖、叶轮、泵轴和轴承体等主要零件构成。

I. HW Mixed-flow

pump is composed of pump casing， pump cover， impeller， pump spindle and bearing

body mainly.

         从水泵进水口看叶轮为逆时针方向旋转（即箭头所示方向旋转。）

V.    Pump Diversion

     Look from inlet of pump， the impeller is

turning clockwise(turning as the direction indicated by rotation arrow)

混流泵，兼有离心泵和轴流泵优点，结构简单，高效区宽，使用方便，适用于平原圩区农田排灌泵站。中国研制的混流泵中，混流泵，蜗壳式的扬程5～12m，流量900～4000m3/h；导叶式的扬程 3～25.7m，流量45～20160m3/h。叶轮直径5.7m，HW混流泵，流量80～100m3/s，扬程 6～12m，转速75r/min， 效率92.1％，250HW混流泵，配套功率7000kW，是世界上投入运行的大型混流泵之一。

      混流泵是国际泵行业的技术开发重点之一。它将部分代替离心泵和轴流泵工作。在日本、苏联、澳大利亚等国，混流泵的效率都达到或**过90％。