multistage submersible pump unit consists of: water pump, submersible motor (including cable), water pipe and control switch four major components.
The submersible pump is a single suction multi-stage vertical centrifugal pump. The submersible motor is a wet-type, vertical three-phase cage induction motor. The motor and water pump are directly connected by a claw type or single cartridge type coupling. Equipped with different specifications of three Core cable; starting equipment for the different capacity levels of air switch and self-dual decompression starter, the water pipe is made of different diameter steel pipe, flange connection, high-lift pump gate valve control.
1, each stage of multistage submersible pump diversion shell is equipped with a rubber bearing; impeller tapered sleeve fixed to the pump shaft; diversion shell with threaded or bolted together into one.
2, high-head submersible pump with a check valve at the top, to avoid downtime caused by water damage to the unit.
3, the upper part of the submersible motor shaft with a labyrinth of sand and two reverse assembly of the oil seal to prevent the flow of sand into the motor.
4, submersible motor with water-lubricated bearings, the lower part with rubber pressure regulating film, pressure regulating spring, composed of surge chamber, regulating the temperature changes caused by the pressure; motor winding with polyethylene insulation, nylon sheath durable consumer goods water magnet wire , Cable connection by QJ-type cable connector technology, the joint insulation off scratch paint layer, were connected, welding firm, with a layer of raw rubber around. And then wrapped with 2 to 3 layers of waterproof adhesive tape, wrapped with 2 to 3 layers of waterproof adhesive tape or a layer of rubber tape wrapped with water (bike belt) to prevent seepage.
5, the multistage submersible pump motor is closed, the use of precision only bolts, cable exports plus pads for sealing.
6, the motor has a water injection hole at the top, there is a vent, the lower part of a drainage hole.
7, the motor is equipped with the upper and lower thrust bearing on the bottom, thrust bearing groove for cooling, and it is the stainless steel thrust plate, with the pump up and down the axial force.