Horizontal multi-stage centrifugal pump with high cavitation resistance

Abstract

A horizontal multi-stage centrifugal pump with high cavitation resistance comprises a stator component and a rotor component, wherein the stator component comprises a water inlet section, an inducer middle section, a middle section, a guide vane, a final-stage guide vane, a flow guide sealing ring, a water outlet section, a stuffing box, an equilibrium ring, a left bearing component and a right bearing component; the rotor component comprises a shaft, a first bearing locking nut, an inducer, a first-stage impeller, an impeller, an impeller spacer sleeve, a balance disc spacer sleeve, a balance disc, a shaft sleeve, a bearing spacer sleeve, a bearing and a second bearing locking nut; the rotor component is fixed through the bearing locking nuts at the two ends; the inducer matched with the first-stage impeller is equipped in front of the first-stage impeller; the inducer and the first-stage impeller are fixed on the shaft and is connected with the shaft through keys for transmission; the first bearing locking nut and the second bearing locking nut close to two ends are fixed in the axial direction; the flow guide sealing ring has a function of a first-stage sealing ring and is arranged on the outer side of the inducer; and the two ends of the flow guide sealing ring are fixed at the inducer middle section and the water inlet section respectively.

Description

technical field [0001] The invention relates to a multistage centrifugal pump, in particular to a horizontal multistage centrifugal pump with high cavitation resistance, which is suitable for conveying water, chemical medium or medium containing a small amount of solid particles in mines, chemical industry and power plants. Background technique [0002] From the perspective of existing technology, with the continuous expansion of the scale of mines, power plants and chemical plants, water pumps continue to develop in the direction of large flow and high lift. From the perspective of design, the design flow of the pump increases, and the suction lift will Reduce, cavitation problem is inevitable first to solve the problem. In order to improve the pump suction and reduce cavitation, the first-stage impeller with a large inlet is used, but the increase in the suction value is limited, which cannot meet the use requirements, and cavitation still occurs, which affects the service...

AI Technical Summary

Problems solved by technology

In order to improve the suction of the pump and reduce the occurrence of cavitation, the first-stage impeller with a large inlet is used, but the increase in the suction value is limited, which cannot meet the requirements of use, and cavitation still occurs, which affects the service life of the pump. The double-suction first-stage impeller is adopted. It can increase the suction lift, but its structure is more complicated and the maintenance is inconvenient

Images