Before using a submersible pump for irrigation in the spring, necessary maintenance must be done to extend the life of the submersible pump and ensure the normal operation of the spring irrigation. First, check the wearing parts. First remove the water pump and inspect the consumable parts such as the impeller, retaining ring, bushing, and bearing housing. The good ones can be used when the electric pump is assembled, and the bad ones should be reassembled after replacing the new qualified parts. It is forbidden to use damaged and unqualified parts. Second, change the lubricant. Separately open the oil hole screw in the sealed chamber and the motor to release all the lubricating oil in the sealed chamber and the motor and replace the new oil to ensure the normal operation of the lubricating system. Third, ensure the seal. When replacing the oil in the sealed room, if it is found that the oil is cloudy and the water content exceeds 50 cubic centimeters, the sealed box or dynamic and static sealing rings must be replaced or replaced as a whole, and the replaced parts must be qualified products to ensure their sealing performance. good. Fourth, remove moisture and moisture. For motor windings with an insulation resistance of less than 0.5mΩ, moist moisture must be removed. The method of drying is the same as a general motor. If the whole or sealed box is not replaced, only the stator part of the electric pump can be removed. Under normal circumstances, the whole or sealed box part should not be dismantled as far as possible, if it really requires disassembly. "O" shaped rubber seal rings must be replaced with new ones. Fifth, check the bearings. Check the motor part of the upper and lower bearings, if found to wear or gap is too large, it is necessary to replace the new bearings in time, is strictly prohibited make do with, so as not to cause greater economic losses. Six, remove the pump shell rust. Before spring use, the uppermost pump casing shall be disassembled, and then the impeller shall be turned on and then started to prevent the parts from rusting and not being able to start normally and burn the motor windings. This maintenance is especially important for the water-filled motor. Seven, to ensure bearing lubrication. For the water-filled submersible pump, the skeleton oil seal and lithium-based grease in the upper and lower end cap bearing chambers should be inspected to ensure that the bearings will work under good lubrication conditions for a long time.
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