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，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 ***all, 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.
（二）开车前准备：
1、检查地脚螺栓的坚固情况。
2、检查传动皮带松紧程度及安装设备是否安装妥善。
3、检查进、出水管是否进气、漏水。
4、检查填料松紧是否适宜。
5、检查电动机和水泵轴心线是否在同一直线上，直联时，电动机旋转方向是否符合泵的旋转方向。
6、检查泵内有无障碍，轴是否卡住，用手转动应轻无杂音。
II. Preparation Before Starting
1. Check the foundation bolts if they are firm.
2. Check the degree of tightness of drive belt and check the
installation if it is suitable.
3.Check the water–in and outpipes if they are leaking water and air.
4.Check the degeree of tightness of padding if it is suitable.
5.Check the
motor and pump axile lead if they are in the same line and check the direction
of rotation of motor if it is the same with the rotation direction of pump.
6.Check the
pump if there are barriers , if the axile locks, there should be no noises when
turing it by hand.
离心泵
1、离心泵的工作原理
水泵开动前，先将泵和进水管灌满水，水泵运转后，在叶轮高速旋转而产生的离心力的作用下，叶轮流道里的水被甩向四周，压入蜗壳，叶轮入口形成真空，水池的水在外界大气压力下沿吸水管被吸入补充了这个空间。Therearewaterweedsandsundriesfilledinthebottomvalveorimpeller1、检查进水管末端是否在水平面以下一米左右2、排除空气3、高速垫料，填塞缝隙拧紧螺栓4、消除水草杂物1。继而吸入的水又被叶轮甩出经蜗壳而进入出水管。由此可见，若离心泵叶轮不断旋转，则可连续吸水、压水，水便可源源不断地从低处扬到高处或远方。综上所述，离心泵是由于在叶轮的高速旋转所产生的离心力的作用下，将水提向高处的，故称离心泵。
按介质分类清水泵、污水泵、海水泵、热水泵、热油泵、稠油泵、机油泵、重油泵、渣油泵、沥青泵、杂质泵、渣浆泵、沙浆泵、灰浆泵、灰渣泵、泥浆泵、水泥泵、混凝土泵、粉末泵、酸碱泵、空气泵、蒸汽泵、氧气泵、氨气泵、煤气泵、血液泵、泡沫泵、乳液泵、涂料泵、***泵、盐酸泵、胶体泵、酒精泵、啤酒泵、葡萄酒泵、巧克力泵、奶泵、淀粉泵、麦汁泵、牙膏泵、盐卤泵、卤水泵、碱液泵、熔盐泵、油脂泵、 、化肥泵、药剂泵、气液泵、油剂泵、化纤泵、纺丝泵、剂量泵、油漆泵、果浆泵、纸浆泵、胰岛素泵、浓浆泵、气泵、水泵、油泵
