Single-stage double-suction centrifugal pump features and appearance structure

Single-stage double-suction centrifugal pump, single-stage double-suction centrifugal pump characteristics, single-stage double suction centrifugal pump structure
First, the characteristics of single-stage double-suction centrifugal pump
Single-stage double-suction centrifugal pump is characterized by large flow, high head; pump is open in the level, maintenance without dismantling the motor and pipeline, as long as the pump cover can be opened for inspection and maintenance; Layout, the basic impeller axial balance, so the operation is more stable; as the pump is relatively bulky, covers an area of ​​large, it is suitable for use. Single-stage double-suction centrifugal pump currently has S, Sh two series. The S series pump is a newer product of Sh series pump. Its performance index is more advanced than Sh series pump. Its scope of application is: pump inlet diameter is 150 ~ 1 400 mm, rotational speed is 360 ~ 2 900 r / min, 18 000 m3 / h, the head is 12-125 m. Widely used in hilly and mountainous areas of large-scale irrigation.
Second, single-stage double-suction centrifugal pump structure
Single-stage double-suction centrifugal pump shape shown in Figure 1-8, the single-stage double suction centrifugal pump structure shown in Figure 1-9. Its main parts and single-stage single-suction centrifugal pump is basically similar, the difference is: single-stage double-suction centrifugal pump impeller is symmetrical, as if by two identical single-suction impeller back to back together, water from Both sides into the impeller. The impeller is fixed with the key, shaft sleeve and two side sleeve nuts. The axial position of the impeller can be adjusted by the sleeve nut. The pump cover and pump body of the single stage double suction centrifugal pump together form the semi-helical suction chamber and the snail pressure Out of the room. Pump suction and outlet are cast in the pump body, was horizontal, perpendicular to the pump shaft. After the flow of water from the suction mouth, along the semi-spiral inhalation chamber from both sides into the impeller, so the pump known as single-stage double-suction centrifugal pump; pump cover and the pump body is open in the horizontal, Said single-stage double-spiral volute centrifugal pump. Single-stage double-suction centrifugal pump impeller inlet and the outer edge of the Department fitted with two leaking ring, said double suction damping ring. Double-suction pump in the pump shaft piercing the pump at both ends of the total installed with two sets of packing seal, the pump is running when the pump ring, , A small amount of high-pressure water through the pump cover in the open surface of the groove and seal ring flow into the packing room, the role of water sealing; double suction pump from the inlet direction, the right end of the shaft coupling, according to need The coupling is mounted on the left end of the shaft, and both ends of the pump shaft are supported by bearings. Bearing type generally single row radial ball bearings, when the shaft diameter and speed of the product Dn,> 300 000 rruu. R / min when the sliding bearing.