Well submersible pump unit installation: 1 submersible pump device by the pump, motor, water pipe, waterproof cable and control switch composed of five parts, the pump is a single suction multi-stage vertical centrifugal pump. 2, the submersible motor adopts the wet structure of flushing, the cavity is filled with clear water, mainly used for motor cooling and bearing lubrication. In the course of operation due to temperature changes, causing the motor cavity flushing pressure changes, the lower end of the motor voltage regulator can be automatically adjusted. 3, in order to prevent muddy invade the motor, equipped with a rejection of sand and skeleton oil seal at the upper end of the motor, formed a sand control mechanism, the entire motor seal structure. 4, the top of the motor has a water hole and exhaust holes, the bottom has a drain hole. 5, the lower part of the motor is equipped with thrust bearing-level thrust plate, the main to withstand the residual axial force of the pump and motor rotor weight. 6, the motor stator winding using water-resistant wire, a good insulation and water resistance, the rotor cage structure.