Maintenance method for vertical multi-stage centrifugal pump:
1. Vertical multistage centrifugal pump repair, motor control switch must be in the "off" position and hanging tablets so as not to cause physical damage. In multistage pump disassembly should be in the parts together mark, for the installation can be carried out smoothly; multistage pump to remove the small parts and fasteners with box installed, mark, indicate the premises; multistage pump removed parts clean, coated with anti rust oil, paint surface if there is corrosion, to the eradication of the corrosion and repainted; horizontal multistage centrifugal pump "O" shape ring, a packing and corrosion of fastening pieces can not be reused for the parts.
2. The vertical multistage centrifugal pump maintenance, the first pump have been removed from the tank, dismantling the motor and a machine base, remove the lower pump shell, knock down the shaft and impeller (pay attention to the pump shaft anticorrosion coating) release bearing sit six hexagon bolt, then is a pump shaft and a bearing assembly together can be pulled out for maintenance.
3. Rotating coupling and just down into the belt, vertical multistage centrifugal pump maintenance and replacement of wearing parts after re assembly, the bearing seat, a bearing installed in the pump shaft upper part of the sealed bearing cover installed coupling and tight and round nut, correction of pump shaft bending, the bearing of the pump in the pump body and the bearing seat is arranged in the middle seat, adjustable impeller and pump shell gap, the impeller and the shaft and impeller cap together with phenolic mastic dip in the pump shaft, such as phenolic mastic fully cured, the pump cover installed and assembled by hand in a pump shaft is normal. Such as the replacement of bearings and pump shaft, the first to open the pump shaft and the shaft coupling, loosen the upper and lower bearing cover 12 screws, the bearing can be made up to play.
4. In the maintenance of vertical multi-stage centrifugal pump for two periods, one is running, one is when the.
1). The operation of the multi-stage pump multistage pump packing leakage; multistage pump lubrication pressure; multistage pump lubricating oil level and bearing temperature; do a good job running log, such as horizontal multistage centrifugal pump fault should be recorded in detail.
2). Multi-stage pump stop. Replace the old vertical multistage centrifugal pump packing; replacement of vertical multistage centrifugal pump oil (pump thrust bearing box); monthly water to flush the vertical multistage centrifugal pump water guided bearings, time is about 2 minutes; at the same time, turn the pump rotor; check run horizontal multistage centrifugal pump water skiing system, check whether the loosening of the fastener.
