Multistage axially split pump

Abstract

The invention discloses a multistage axially split pump which comprises a pump shaft, an impeller, a pump body provided with an overflowing channel and a guide liner, wherein the impeller is fixedly arranged on the pump shaft in a sleeved manner; the pump body is arranged outside the pump shaft in a sleeved manner; the impeller is positioned in the overflowing channel and matched with an inner wall of the pump body to form a containing chamber; and the guide liner is arranged on the pump body, positioned in the containing chamber and pressed against and matched with the inner wall of the pump body and the impeller. Therefore, when the impeller rotates along with the pump shaft, due to the isolation action of the guide liner, frictional wear caused by a direct relative motion between the pump body and the impeller can be avoided, and frictional erosion formed by scouring of flow media on the impeller can be reduced, so that the service life of the whole pump is prolonged, and the operating efficiency and stability of the pump are improved. In addition, the whole pump can achieve excellent hydraulic performance, and liquid flow turbulence is avoided.

Description

technical field [0001] The invention relates to the technical field of medium delivery, in particular to a multi-stage split pump. Background technique [0002] Split pumps are widely used in petroleum, chemical industry, electric power metallurgy, mining, ship selection, light industry, agriculture, civil and national defense departments because of their advantages such as large flow rate of conveying medium, long service life and high conveying efficiency. plays an important role in the national economy. According to performance and structure, split pumps include single-stage, double-stage and multi-stage types. However, the split pumps of the above types are usually composed of pump body, impeller, pump shaft, sealing ring and other components. Among them, the pump body and the impeller are usually cast to form a flow passage, and the medium flows into the impeller suction port through the flow passage of the pump body, and is finally pumped out. However, the cast pump...

AI Technical Summary

Problems solved by technology

However, the cast pump body and the impeller itself inevitably have casting defects and errors, resulting in greater friction and wear when they rotate with each other. At the same time, the erosion of the medium will also cause friction and erosion to the impeller, so that the pump body cannot be guaranteed. Hydraulic performance, resulting in turbulent medium flow, affecting the operation efficiency and stability of the whole pump

Images