1 submersible electric pump unit consists of four parts: water pump, submersible motor (including cable), water pipe 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 stepping motor, and the motor and the water pump are directly connected through claw or medium key barrel coupling; It is equipped with three core cables of different specifications: the starting equipment is air switches and self coupling decompression starters of different capacity levels, the water delivery pipe is made of steel pipes with different diameters, which is connected by flanges, and the high lift electric pump is controlled by gate valve.  

2. A rubber bearing is installed in the guide shell of each stage of submersible pump; The impeller is fixed on the pump shaft with a conical sleeve: the guide housing is integrated with rayon or bolts.

3. The upper part of the high lift submersible pump is equipped with a check valve to avoid unit damage caused by shutdown water hammer.  

4. The upper part of the submersible motor shaft is equipped with labyrinth sand preventer and two reverse assembled skeleton oil seals to prevent quicksand from entering the motor.  

5. The submersible motor adopts water lubricated bearing, and the lower part is equipped with rubber pressure regulating film and pressure regulating spring to form a pressure regulating chamber to regulate the pressure change caused by temperature; The motor winding adopts polyethylene insulated and nylon sheathed water-resistant electromagnetic wire. The cable connection method is according to the  cable joint process. Remove the joint insulation, scrape the paint layer, connect them respectively, weld firmly, and wrap - layer with raw rubber. Then wrap it with waterproof adhesive tape for 2 ~ 3 layers, and wrap it with 2? 3 layers of waterproof tape or water glue bonding and wrapping a layer of rubber belt (bicycle inner tire) to prevent water seepage.

6. The motor is sealed with precision stop screw, and the cable outlet is sealed with glue.

7. There is a water injection hole and a vent hole at the upper end of the motor, and a drain hole is drilled at the upper part of the motor.  

8. The lower part of the motor is equipped with upper thrust bearing. There are grooves on the thrust bearing for dry cooling. The stainless steel thrust disc is worn against it to bear the upper axial force of the water pump