可供选择材料:

零件名称

材料名称

代号(GB)

 

 

 

灰铸铁

球墨铸铁

铸钢

HT250

QT400-18

ZG230-450

 

 

 

 

青铜

灰铸铁

硅黄铜

不锈钢

ZCuSn1OPb1

HT250

ZCuZn16Si4

ZCOCr18nIi12Mo2Ti

 

 

不锈钢

 

碳钢

2Cr13

 

45

 

泵体密封体

 

青铜

灰铸铁

硅黄铜

不锈钢

ZCuSnlOPbl

HT250

ZCuZn16Si4

ZGOCr18nIi12Mo2Ti

 

三、拆卸与装配

拆卸:

  1、关闭出121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、拆下轴承体和泵体的连接螺栓.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;

     Couplings of flexible  type connect the pump with the motor directly.

     Material:

Nattie

Materials

Code(GB)

Volute

 

casing

Cast iron

Ductile cast iron

Cast steel

HT250

QT400-18

ZG230-450

 

 

Impeller

 

Cast iron

Bronze

Brass

Stainless steel

ZCuSn10Pb1

HT250

ZCuZn16Si4

ZGOCr18nIi12Mo2Ti

Shaft

 

Stainless steel

Cr-steel

2Cr13

45

Casing

Wear

rlng

Cast iron

Bronze

Brass

Stai nless steel

ZCuSn1OPb1

HT250

ZCuZn16Si4

ZGOCr18nli12Mo2Ti

 

Ⅲ. Disassemable And Assembly

   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 volute casing. 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).