Corrosion chemical centrifugal pump maintenance technical standards of rolling bearings

corrosion chemical centrifugal water pump generally have vertical and horizontal two kinds, horizontal have straight and fission, etc. , usually adopts the complete conveyor motor to drive the impeller and centrifugal pump in rotary bearing rotating equipment is very important, bearing a lot of more phyletic, the common rolling bearing generally consists of four parts:

cage - — That uniform separates rolling body, to prevent friction and collision between rolling body.

outer ring - — Placed inside the body or bearing, stationary.

inner ring - — Installed on the shaft, work closely with the shaft and the shaft rotation.

rolling body - — With outer ring raceway, between a ball, roller, roller cone type.

rolling bearing type:

thrust bearing - — Only bear axial load, thrust bearing in common use such as thrust ball bearing l.

the centripetal thrust bearing - — At the same time carry axial and radial load, commonly used such as taper roller bearing.

the centripetal bearing - — Mainly bear radial load, radial bearings in common use such as deep groove ball bearing l.

corrosion chemical centrifugal water pump for the maintenance of rolling bearing technology standard:

1, with the bearing and shaft adopts the basic hole system, with the bearing and the shell adopts the basic shaft system. Bearing dimensional tolerance and revolving tolerance values according to GB 307 - The provisions of the 84.

2, cooperate with bearing journal and bearing of the hole in the cabinet according to GB 1031 - The provisions of the 83 journal roughness Ra value is less than 1. 6 microns, bearing hole roughness Ra value is less than 2 in the box. 5μm。

3, made of GCr15 and ZGCr15 steel bearing ring and roller, the ring and roller hardness value should be 61-65 HRC; With GCr15SiMn and ZGCr15SiMn steel manufacturing, its hardness value should be 60 ~ 64 HRC. Hardness test and the uniformity of the hardness of the same parts according to the provisions of the JB 1255.

4, check the bearing radial clearance and axial clearance should comply with the GB 4604 - The provisions of the 84.

5, rolling bearing inner and outer ring raceway should be no peeling, serious wear and tear, can not have both internal and external ring crack; Ball should be no wear, keep no serious deformation, turns, no abnormal noise and vibration should be gradually stop stop.

6, for C grade tolerance of tapered roller bearings, roller and ring raceway contact precision, to a certain load, under the action of the examination of the color, the contact trace should be continuous, contact length should not be less than 80% of roller busbar.

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