The working environment of centrifugal pump is bad, need to deliver the drilling fluid for a long time, so we need to maintain it constantly. The following is the detailed maintenance of centrifugal pump.
1 Impeller: It must be renewed if serious cavitation (in particular the main vanes) and excessive damage.
2 Shaft: Repair and maintain or renew it if the runout is over 0.05mm, the location of lip seal had been seriously bruised and the surface of shaft had been damaged.
3 Shaft sleeve: Please renew it if rough surface and serious damage.
4 Lip Seal: The dismantled lip seal must be changed.
5 Ball Bearing: For the bearing which is too wearing, and too tight, loose or with noise when operating, sure to renew it (Note: The new bearing box is unpacked only when renewing and it must be the same type and size as original one).
6 All the parts and particularly the rotating ring of mechanical seal, ‘0’ sealing groove, thread, sealing face, bearing and its lubricating location must be carefully cleaned. Also polish the rough location with sifts gauze.
7 When assembling the inboard bearing, the two bearings should be back to back, sure to buckle the lock washer after screwing the locknut and the locking force is 346N.M.
8 A thin layer of antifriction should be smeared on the shaft before fitting the shaft sleeve.
9 The clearance between the back of impeller and protecting plate is 0.6mm.
10 The locking force of each bolt & nut is 195N.M.
11 The packing gland cannot be screwed too tight and keep the liquid leaking drop by drop, or the packing will be burned down when the pump operating.
12 The assembling can be proceeded as the opposite sequence and pump shaft should smoothly rotate after assembling.
1 Impeller: It must be renewed if serious cavitation (in particular the main vanes) and excessive damage.
2 Shaft: Repair and maintain or renew it if the runout is over 0.05mm, the location of lip seal had been seriously bruised and the surface of shaft had been damaged.
3 Shaft sleeve: Please renew it if rough surface and serious damage.
4 Lip Seal: The dismantled lip seal must be changed.
5 Ball Bearing: For the bearing which is too wearing, and too tight, loose or with noise when operating, sure to renew it (Note: The new bearing box is unpacked only when renewing and it must be the same type and size as original one).
6 All the parts and particularly the rotating ring of mechanical seal, ‘0’ sealing groove, thread, sealing face, bearing and its lubricating location must be carefully cleaned. Also polish the rough location with sifts gauze.
7 When assembling the inboard bearing, the two bearings should be back to back, sure to buckle the lock washer after screwing the locknut and the locking force is 346N.M.
8 A thin layer of antifriction should be smeared on the shaft before fitting the shaft sleeve.
9 The clearance between the back of impeller and protecting plate is 0.6mm.
10 The locking force of each bolt & nut is 195N.M.
11 The packing gland cannot be screwed too tight and keep the liquid leaking drop by drop, or the packing will be burned down when the pump operating.
12 The assembling can be proceeded as the opposite sequence and pump shaft should smoothly rotate after assembling.
http://www.kosunservices.com/solids_control_equipment/Shear-Pump.html
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