定,将轴承体压盖用固定螺钉紧固。

    4、装上填料、放好中开面纸垫、盖上泵盖、拧紧螺尾锥销后,拧紧泵盖螺母,最后装上填料压盖。不要将填料压得太紧,填料过紧会使轴套发热,同时耗用功率大;也不要压得太松,填料过松液体渗漏大,水泵效率降低,所以应在运行时予以调节。

    装配完成后,用手转动泵轴,没有擦碰现象,转动比较轻滑均匀即可。

    拆卸可按上述装配顺序相反地进行。

四、安    装

    1、检查水泵和电机应无损坏:

    2、水泵的安装首先要满足装置汽蚀余量NPSHa大于泵的必须汽蚀余量NPSHr,使泵在运行时不发生汽蚀。基础尺寸应符合泵机组的安装尺寸。

    3、安装顺序:

    (1)、将水泵放在埋有地脚螺栓的混凝土基础上,用调整其间的楔形垫块的方法校正水平,并适当拧紧地脚螺栓,以防走动;

    (2)、在基础与泵底脚之间灌注混凝土:

    (3)、待混凝土干固后,拧紧地脚螺栓,并重新检查水泵的水平度;

    (4)、校正电动机轴与水泵轴的同心度,使两轴成一直线,在两联轴器外圆上的不同心度允差为0.1毫米,端面间隙沿圆周的不均匀允差为03毫米(在联接进出水管路及试运行后再分别校核一遍,仍应符合上述要求)

    (5)、在检查电动机转向与水泵转向符

circle of the impeller seal position and the sleeve excircle on the rotor partwhich is not allowed to exteed its provisions as following

Norminal

Diameter

<50

 

>50

120

>120

260

>260

500

>500

800

>800

1250

Beats

0.05

0.06

0.08

0.10

0.12

0.16

    3. Assemble the rotor part and studs on the pump casing and well install the bearing gland and tighten it with bolls,  then you can adjust the axial position of the impeller with shaft sleeve nuts up to middle flow passage way of the pump casing and tighten it.

    4. Feed the packing into the packing box. Place the horicental joint paper gasket,  cover the pump, hammar(or other things)  the taper pin with exteral thread tightly, the following, screw its unts aud mount the packiug gland which degree of the packing tightness must be suitable  (if too light,  the shaft sleeve would be over heated,  samely more power would be consumed; if too loose, the leakage of liquid would be found from here,  and thus would decrease the pump efficiency. )

    After finishing assembling the pump,  turn the rotor with hands, it should be flexible and smooth as well as no block and no rubbing. That is OK! and then you can operate it freely.

    (Disassemble it according to the opposite order of assembling)

Ⅳ. Installation

    1. Check whether the pump and the motor are in good condition.

    2. Make sure that the value of NPSH is higher than the one that have been given, and its fouudation dimensions should be in comformity with the installation drawing.

    3. The steps of installation:

    (1) Sleeve the foot bolts and hat the nuts on the pump and the motor,  place the pump on the concret foundation where some foot bolt holes are pre -built, correct the horizontal and the coaxial degree between