The submersible pump unit is composed of four parts: water pump, submersible motor (including cable), water pipeline and control switch. The submersible pump is a single-suction multistage vertical centrifugal pump; The submersible motor is a closed water-filled wet, vertical three-phase squirrel cage asynchronous motor, and the motor and the pump are directly through the claw type or single cartridge coupling; Equipped with three-core cables of different specifications; The starting equipment is made of air switches and self-coupling pressure reducing pneumatics of different capacity levels, and the water pipeline is made of steel pipes of different diameters, which are flange connected, and the high-lift electric pump is controlled by gate valve.
The upper part of the submersible motor shaft is equipped with a labyrinth sand arrester and two skeleton oil seals for return assembly to prevent quicksand from entering the motor. The submersible motor adopts water lubricated bearing, and the lower part is equipped with rubber pressure regulating film and pressure regulating spring, which constitutes a pressure regulating chamber to adjust the pressure change caused by temperature; The motor winding adopts polyethylene insulation, nylon household set water-resistant electromagnetic wire, cable connection method according to the cable joint process, the joint insulation is removed from the scraping paint layer, connected separately, welded firmly, and wrapped around a layer with raw rubber. Then wrap 2-3 layers of waterproof adhesive tape, and wrap 2-3 layers of waterproof adhesive tape on the outer bread or wrap a layer of rubber (bicycle inner tube) with water glue to prevent water penetration.
Each stage of the submersible pump is equipped with a rubber bearing; The impeller is fixed to the pump shaft with a conical sleeve; The deflector housing is joined together by threads or bolts. The upper part of the high lift submersible pump is equipped with a check valve to avoid damage to the unit caused by water hammer shutdown. The electrical security is closed, and the precision stop bolts are used and the cable outlet is sealed with rubber pads. There is a water injection hole at the upper end of the motor, an air release hole, and a water discharge hole in the lower part. The lower part of the motor is equipped with upper and lower thrust bearings, which have grooves for cooling, and its grinding stainless steel thrust disc to withstand the upper and lower axial forces of the water pump.