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The mechanical structure of submersible pump
- Jan 31, 2018 -

Submersible pump unit consists of four parts: water pump, submersible motor (including cable), water supply pipe and control switch. Submersible pump for the single suction multistage vertical centrifugal pump, submersible motor for airtight water-filled wet, the vertical three-phase squirrel-cage asynchronous motor, motors and pumps through the claw-type or single-button barrel-type coupling direct; equipped with different specifications of the three-core cable; Starting equipment for different capacity levels of air switches and self-coupled vacuum pneumatic, water supply pipe for different diameters of steel pipe made, The use of flanged connection, the electric pump with a gate valve control.

The upper part of the submersible motor shaft is equipped with labyrinth type sand control device and two back-assembled skeleton oil seals to prevent the flow of sand into the motor. Submersible motor adopts water lubricated bearing, the lower part is equipped with rubber pressure-regulating film, adjust the pressure spring, composition of the surge chamber, adjust the pressure changes due to temperature; The motor windings are polyethylene insulated, nylon household waterproof electromagnetic wire, cable connection way according to the cable joint process, the joint insulation off to scrape the paint layer, respectively, connected, welded firmly, Round the floor with raw rubber. Again with waterproof sticky tape wrapped 2-3 layer, outside pack 2-3 layers of waterproof adhesive tape or water glue to wrap a layer of rubber to prevent seepage.

A rubber bearing is arranged in each stage of the submersible pump, and the impeller is fixed on the pump shaft with a vertebral sleeve, and the guide shell is integrated with thread or bolt. The top of the Cheng pump is equipped with check valve to avoid the downtime of water hammer caused unit damage. The motor is sealed with precision stop bolts, and the cable outlet is sealed with a rubber cushion. There is a water injection hole in the upper end of the motor, and there is a drain hole in the lower part. The lower part of the motor is equipped with the upper and lower thrust bearing, the thrust bearing has a groove for cooling, and it is on the grinding stainless steel push plate, bearing the upper and lower axial force of the pump.

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