Horizontal type self-balancing multistage centrifugal pump with high cavitation resistance

Abstract

A horizontal type self-balancing multistage 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 flow guide sealing ring, a middle section, a front guide vane, a front final-stage guide vane, a water outlet section, a rear final-stage guide vane, a rear guide vane and a secondary induction section which are fixed through a tightening bolt assembly; the rotor component comprises a shaft, a shaft sleeve with two ends locked and fixed on the shaft through round nuts, an inducer, a first-stage impeller, a front impeller, an intermediate shaft sleeve, a rear impeller and a bearing and dirt blocking plate fixed through a bearing locking nut and a round nut; the first-stage impeller and the front impeller and the rear impeller are arranged symmetrically back to back; 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 a pump shaft and is connected with the shaft through keys for transmission; an axial direction fixes the inducer, the first-stage impeller, the front impeller and the rear impeller are fixed by the round nuts close to two ends in the axial direction; the flow guide sealing ring 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 self-balancing 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, power plants, etc. . Background technique [0002] From the perspective of prior art, most of the multi-stage pumps on the market are first-stage single-suction, and other impellers are arranged in the same direction. With the continuous expansion of the scale of mines, power plants and chemical plants, water pumps are constantly developing in the direction of large flow and high head. It is inevitable to solve the problem first. Sometimes the medium contains a small amount of solid particles, which is easy to damage the balance mechanism and cannot balance the axial force, resulting in damage to the pump and affecting normal use. [0003] In recent yea...

AI Technical Summary

Problems solved by technology

In order to improve the pump suction 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 first-stage double-suction impeller is adopted. It can increase the suction lift, but its structure is more complicated and the maintenance is inconvenient

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