十一、拆卸与装配

    拆卸:

    1、关闭出口阀,打开放水塞和排气塞以排空水泵中的水;

    2、拆除泵上所有辅助管路;

    3、拆除联轴器防护罩;

    4、松开并拆下密封盖;

    5、松开法兰螺钉,用起盖螺钉将泵体和泵盖分开,用起重机吊起泵盖;

    6、轴承为稀油润滑的,放掉稀油;

    7、拆下轴承体和轴承托架之间的连接螺栓,松开非驱动端轴承盖螺母和连接螺栓;

    8、将轴承体退出凹槽,并将转子吊出泵体,平放在安全的地方进一步拆卸;

    9、拆下非驱动端轴承的轴承体;

    10、松开并拆下圆螺母;

    11、从轴上拆下深沟轴承、轴套;

    12、拆下轴承盖;

    13、从轴套上拆下挡水圈;

    14、拆下密封体、轴套;

    15、用橡胶榔头轻轻敲击叶轮轮毂将叶轮从轴上退出;

    16、拆下另一端轴套、密封体,拆下联轴器,拆下轴承体;

    17、松开弹性挡圈,退出深沟轴承。

    装配顺序按拆卸顺序相反进行,但必须注意:

    1、安装转子时必须将轴放稳,所有的配合螺纹和间隙配合处都必须清洗并涂上装配粘合剂;

    2、装带有间隙配合的叶轮时,应注意叶轮的转向;

    3、深沟轴承须加热后装上轴(轴套)

    4、为补尝泵轴与轴上零件之间由于热膨胀产

Ⅺ. Assembly and Disassembly

    1. Close the suction and delivery gate valves and drain the pump by opening the drain plug;

    2. Remove any pipes between additional equipment and the pump;

    3. Remove coupling guard;

    4. Loosen and push back the seal cover;

    5. Undo flange screws and release the upper casing half from the lower casing half with the aid of the forcing screws, remove with lifting gear and store in a safe place.

    6. In case of oil- lubricated pumps,  drain off the oil;

    7. Remove the screw connection between bearing housing and bearing brackets. Also undo the nuts and bolts which secure the bearing cover;

    8. Press the bearing housing out of the recesses and lift the rotor upwards out of the lower casing half. For further disassembly,  place securely in horizontal positon.

    9. Pull off the bearing housing of the fixed bearing(opposite the drive end).

    10. Undo and twist off the grooved nut.

    11. Remove the deep groove ball bearing with bush from the shaft.

    12. Remove bearing cover.

    13. Remove block water ring from shaft-protecting sleeve;

    14. Remove shaft seal housing;

    Pull off shaft protecting sleeve;

    15. The impeller located with sliding fit on the shaft and can normally be removed easily. In case of difficulty,  it can be loosened by gently tapping with a plastic hammer;

    16. Remove second shaft protection sleeve complete with the shaft seal housing,  if fitted. Remove couping half and pull off deep groove ball bearing;

    17. Pull off bearing housing. Remove circlip and pull off deep groove ball bearing.

    Reassembly is effected in reverse order to; dismantling, but must give your attention to:

    1. For assembling the rotor,  position the pump shaft securely. All fits, threads and sliding fits of the shaft must be cleaned and coated with assembly paste;

    2. Mount the impeller,  which has a sliding fit. When fitting the impeller, observe the direc-