Self-balancing multi-stage pump four-volute-chamber water outlet structure

Abstract

The invention relates to a self-balancing multi-stage pump four-volute-chamber water outlet structure. The self-balancing multi-stage pump four-volute-chamber water outlet structure comprises a pump body; a main shaft is arranged in the center of the pump body; a positive impeller and a final-stage positive impeller are installed on the left side of the main shaft; a negative impeller and a final-stage negative impeller are installed on the right side of the main shaft; a water outlet section is arranged in the middle of the pump body and provided with four volute chambers; the positive impeller and the final-stage positive impeller are symmetrically arranged in the two volute chambers on the left side of the water outlet section; the final-stage negative impeller and the negative impeller are symmetrically arranged in the two volute chambers on the right side of the water outlet section; a positive guide vane is installed on the left side of the water outlet section; a negative guide vane is installed on the right side of the water outlet section; the first volute chamber and the third volute chamber are both round volute chambers; the second volute chamber is a spiral volute chamber; and the fourth volute chamber is a spiral parabolic volute chamber. Through the unique structural design, the efficiency of a pump is improved, noise is lowered, and the service life of the pump is prolonged.

Description

technical field [0001] The invention relates to the technical field of multistage pumps, in particular to a water outlet structure of a self-balancing multistage pump with four vortex chambers. Background technique [0002] Self-balancing multi-stage centrifugal pumps are composed of stator parts and rotor parts. Among them, the stator parts are composed of water inlet section, middle section, positive guide vane, reverse guide vane, water outlet section, secondary water inlet section, front and rear bearing bodies, transition The rotor components are composed of the main shaft, the positive impeller, the reverse impeller, the shaft sleeve, the bearing retainer sleeve, the middle and rear throttling sleeves, and the coupling. The prime mover drives the water pump to rotate, the medium is sucked in from the water inlet section, pressurized by the positive impeller group, flows into the secondary water inlet section through the transition pipe, and flows out from the water out...

AI Technical Summary

Problems solved by technology

[0003] Existing multi-stage pumps are mostly self-balancing multi-stage pumps and balanced disc multi-stage pumps, which have a long discharge stage, poor rigidity of the main shaft, and low reliability

The vortex chambers of existing multi-stage pumps are all spiral or circular. When the high-lift and large-flow water flow is thrown out of the spiral vortex chamber, there are problems such as large water outlet resistance, uneven flow, large noise, and serious cavitation

The shape of the existing vortex chamber and the design of the water outlet angle do not fully conform to the principle of fluid mechanics, and it cannot ensure that the water flow enters the outlet pipe very uniformly. Greater wear, greater noise, greater cavitation

In addition, the shape of the pump tongue of the existing multi-stage pump is simple triangle, inclined plane or arc shape, which does not match the hydraulic action. pump life

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