Before dismantling the stainless steel submersible pump, you should first unscrew the open water screw plug to drain the water inside the pump, and remove the pipeline connected to the pump, and then dismantle the pump according to the following steps:
1, dismantle the pump cover. Unscrew the nut to remove the pump cover. If it is difficult to remove, use a screwdriver to open the pump cover and then remove it.
2. Remove the coupling or pulley. Unscrew the fixing screws or nuts of the coupling or pulley, and then pull the coupling or pulley out from the end of the shaft with a pulley puller.
3, remove the impeller. Use the impeller wrench to unscrew the reverse nut and check washer on the shaft head, the impeller can be removed from the shaft.
4, dismantle the pump casing and sealing packing. Loosen the packing gland connected with the pump casing, unscrew the screws connecting the pump casing and the bracket to remove the pump casing, and then hook out the packing and water sealing ring with a wire.
5, dismantle the bearing: first remove the bearing cover, and then use the wheel puller to pull out the bearing.
Second, stainless steel submersible pump motor disassembly
1, first remove the motor shaft body and sleeve coupling between the positioning pin, and then loosen the motor and pump coupling bolts, the motor shaft body and pump coupling separation.
2. Unscrew the drain bolt on the lower part of the motor and drain the water from the inner cavity of the motor.
3, remove the foot, loosen the base, carefully remove the base and thrust bearing. Do not hit the base with a hammer to avoid damaging the thrust bearing.
4, remove the thrust bearing, thrust disk and thrust bearing put away, in order to view the repair and reuse.
5. Remove the upper coupling flange of the motor. Open the gland, carefully remove the mechanical seal. If the shaft extension end of the equipment is rubber skeleton oil seal, can be removed with the upper guide bearing.
6, remove the upper guide bearing, and then remove the lower guide bearing, and pull out the rotor together. Be careful not to touch the stator winding end to avoid damage to the winding insulation.
Three, stainless steel submersible pump disassembly precautions
1, to prepare to place the pump spare parts container, and according to certain disassembly steps. Do not put the messy dumping, so as not to lose or touch the spare parts.
2, to reasonably use special tools, such as pulling the wheel, impeller wrench. Do not do it.
3, when disassembling and assembling, we should keep the parts and components of the close surface clean, can not be bruised and damaged.
4, assembly of tighter spare parts, to use a wooden board pad before hammering.
Four, stainless steel submersible pump overhaul steps
Stainless steel submersible pump in overhaul, according to the length of time in use is divided into small repair, medium repair and overhaul of three kinds of specific content is as follows:
Small stainless steel submersible pump repair
1, check the bearings and oil chamber.
2, replacement and cleaning of mechanical seals.
3, clean and overhaul the affiliated valves.
4, check and tighten each bolt.
Submersible stainless steel pump repair
1, including all the contents of the small repair.
2, overhaul mechanical seals, replacement parts.
2, check the static balance of the impeller and rotor dynamic balance.
3, check and adjust the impeller sealing ring, bushing, gland, shaft seal and other parts of the gap.
4, check the wear of the bearing, scraping and researching the shaft tile, adjusting the clearance, as well as the replacement of bearings.
Stainless steel submersible pump overhaul
1, replace the impeller.
2, including the contents of the repair.
3, measure and adjust the level of the pump body.
4, pump body thickness measurement, identification, do the necessary repairs.