1. How to disassemble the stainless steel submersible pump
Before disassembling the stainless steel submersible pump, you should unscrew the water opening plug to release the accumulated water in the pump, and remove the connection with the pump Then disassemble the water pump according to the following steps:
1. Remove the pump cover. The pump cover can be removed by unscrewing the nut. When it is difficult to remove, use a screwdriver to open the pump cover before removing it.
2. Remove the coupling or pulley. First unscrew the fixing screw or nut of the coupling or pulley, and then use the pulley to pull the coupling or pulley out of the shaft end.
3. Remove the impeller. Use the impeller wrench to unscrew the reverse nut and the anti-return washer on the shaft head, and the impeller can be removed from the shaft.
4. Remove the pump casing and packing. Loosen the packing gland connected with the pump casing, unscrew the screw connecting the pump casing and the bracket to remove the pump casing, and then hook out the packing and the water seal ring with an iron wire.
5. Remove the bearing: first remove the bearing cover, and then use the puller to pull out the bearing.
2. Removal of stainless steel submersible pump motor
1. First remove the positioning pin between the motor shaft and the sleeve coupling, and then loosen The coupling bolt between the motor and the pump separates the motor shaft from the pump coupling.
2. Unscrew the drain bolt on the lower part of the motor and drain the water in the inner cavity of the motor.
3. Remove the feet, loosen the base, and carefully remove the base and thrust bearing. During disassembly, do not hit the base vigorously with a hammer to avoid damage to the thrust bearing.
4. Remove the thrust bearing, and put the thrust disc and thrust bearing in place for checking and repairing for reuse.
5. Remove the coupling flange on the upper part of the motor. Flip the gland open and carefully remove the mechanical seal. If the shaft extension end is equipped with a rubber frame oil seal, it can be removed together with the upper guide bearing.
6. Remove the upper guide bearing, then remove the lower guide bearing, and pull out the rotor together. Be careful not to rub the stator winding ends to avoid damage to the winding insulation.
3. Precautions for disassembly and assembly of stainless steel submersible pump
1. Prepare a container for placing pump spare parts, and follow certain disassembly steps. Don’t throw it around, so as not to lose or break the spare parts.
2. Use special tools reasonably, such as pulleys, impeller wrenches, etc. Don’t be reckless.
3. When disassembling and assembling, keep the sealing surface of the spare parts clean and not bruised or damaged.
4. When assembling tighter parts, use a wooden board to pad it and then hit it with a hammer.
Four. Maintenance steps of stainless steel submersible pump
When the stainless steel submersible pump is overhauled, it is divided into three types: minor repair, medium repair and major repair according to the length of use. The details are as follows:
Minor repair of stainless steel submersible pump
1. Check the bearing and oil chamber.
2. Replace and clean the mechanical seal.
3. Clean and overhaul the valve.
4. Check and tighten all bolts.
Medium repair of stainless steel submersible pump
1. Including all minor repairs.
2. Overhaul the mechanical seal and replace the parts.
2. Check the static balance of the impeller and the dynamic balance of the rotor.
3. Check and adjust the clearance of the impeller seal ring, shaft sleeve, gland, shaft seal, etc.
4. Check the bearing wear, scrape and grind the bearing bush, adjust the clearance, and replace the bearing.
Stainless steel submersible pumpOverhaul
1. Replace the impeller.
2. Including the content of middle school.
3. Measure and adjust the level of the pump body.
4. Measure the thickness of the pump body, identify it, and make necessary repairs.
