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Application of Submerged Pump in Sewage Treatment Project (â…¡)
(2) The motor matched with the pump is an oil-immersed water-resistant structure, and the motor is filled with insulating oil to increase the cooling effect. The motor windings are made of water-resistant and oil-resistant windings. Even if the water inside the motor does not drop in insulation, the failure rate of the units will be reduced to a minimum. The motor bearings adopt enhanced rolling bearings, thin oil lubrication, and windings overheat protection to keep the motor running When the winding temperature is too high to provide the signal. Dynamic sealing of the motor adopts hard to hard mechanical seal, good sealing performance and long unit life. This series of pump parameter range: flow 50 m3 / h ~ 2500 m3 / h; head 9 m ~ 150 m; motor power: 7.5 kW ~ 600 kW voltage level 380V, 3000V, 6000V. 3, QSKG series coaxial submersible pump coaxial submersible pump is the impeller of the pump installed directly on the motor shaft extension, pump one. Its features are compact structure, easy installation, no pump room, small footprint, can achieve long-distance control operation, safe, reliable, easy to maintain, the pump is short and thick. Available for mining (including surface mine) drainage emergency rescue, drainage surface drainage, urban water supply, irrigation and drainage with agriculture. The series submersible pump has the following characteristics: (1) system components: coaxial pump system consists of coaxial submersible motors, pumps, power cables, signal cables, connector materials, gate valves, check valves, elbows and other components. (2) submersible motor: water-filled wet seal structure, usually vertical installation. a, according to use, and some chassis with ribs and waterways, and equipped with suction hood to facilitate motor cooling. b, the bottom of the motor with flexible capsules, can automatically adjust, balance the pressure inside and outside the motor. c, the motor adopts mechanical seal and rubber oil seal, the interface with rubber "â—‹" ring and sealant, with good sealing performance. d, motor bearings and thrust bearings are made of high-quality high-strength wear-resistant materials, wear resistance, bearing axial force high. e, the motor windings directly connected by the lead cable and leads. (3) Pump: Multi-stage single impeller, mounted directly on the shaft end of the motor, impeller and guide shell using high-strength wear-resistant cast iron, but also according to user requirements using alloy coating or wear-resistant coating. The main parameters of the series pump range: flow rate of 200 m3 / h ~ 1500 m3 / h; head of 10 m ~ 120 m; motor power: 33 kW ~ 500 kW; voltage levels: 380V, 3000V, 6000V.