A horizontal split parallel multistage pump

Abstract

The invention discloses a horizontal middle-split-type parallel connection multistage pump. The multistage pump comprises an outlet, a first inlet and a second inlet which are formed in a pump housing. The first inlet and the second inlet are located in the left side and the right side of the outlet correspondingly and are distributed in a left-right symmetrical mode by using the outlet as the center. A center shaft is arranged in the axial direction of the center part of the pump housing. One end of the center shaft extends out of the pump housing, and the end, extending out of the pump housing, of the center shaft is connected with a pump connector through a rotor part. Three stages of impellers are further arranged inside the pump housing. The first-stage impeller and the second-stage impeller are symmetrically distributed, and double suction is adopted in the tail-stage impeller, so that automatic balancing of axial force is guaranteed. Transition flow channels are adopted between the stages, and an internal conversion flow channel is omitted. According to the horizontal middle-split-type parallel connection multistage pump, the three stages of impellers are adopted, the first-stage impeller and the second-stage impeller are symmetrically distributed, double suction is adopted in the tail-stage impeller, the internal conversion flow channel is omitted, casting difficulties are lowered, and automatic balancing of the axial force is guaranteed.

Description

technical field [0001] The invention relates to the technical field of multistage pumps, in particular to a horizontally split parallel multistage pump. Background technique [0002] Horizontal split multistage pump is a kind of high-lift pump, which has the characteristics of high lift, large flow, high power, etc. It is mostly used in sewage treatment, environmental protection, large-scale water conservancy and hydropower, etc. The horizontal split multistage pump with high head, large flow and high power has the advantages of small footprint, low operating cost, safety and reliability, etc. It is the first choice for pump station technical transformation and has broad market application prospects. [0003] At present, most of the horizontal split multistage pumps in the prior art are single-suction and the impellers are arranged in one direction, which is lower than the speed pump efficiency, and the axial force of the pump cannot be automatically balanced during operatio...

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Problems solved by technology

[0003] At present, most of the horizontal split multistage pumps in the prior art are single-suction and the impellers are arranged in one direction, which is lower than the speed pump efficiency, and the axial force of the pump cannot be automatically balanced during operation, and the requirements for the casting level of the shell are very high. , the casting of the shell is difficult, and factors such as the weight, complexity and quantity of a single piece need to be considered, the casting risk is high, and the manufacturing cost is high

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