Single-stage single-suction centrifugal pump and monitoring method

By designing a lever frame and ball bearing structure for a single-stage single-suction centrifugal pump, the problems of high flow rate and high cost of single-stage double-suction pumps in small mines were solved, achieving axial stability and reduced energy consumption. Combined with a sensor monitoring system, the operational reliability and intelligence of the centrifugal pump were improved.

CN122061978APending Publication Date: 2026-05-19JIANGSU CHANGJIANG WATER PUMP CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
JIANGSU CHANGJIANG WATER PUMP CO LTD
Filing Date
2026-04-08
Publication Date
2026-05-19

AI Technical Summary

Technical Problem

In small mines or scenarios where continuous operation is not required, single-stage double-suction centrifugal pumps have large flow rates, high motor power, and high costs. Furthermore, single-suction centrifugal pumps suffer from axial pressure imbalance, which affects the normal pumping of fluid by the impeller.

Method used

Design a single-stage, single-suction centrifugal pump that uses a lever frame and ball bearing structure for axial force balance. Combined with sensors to monitor the operating status of the impeller and mechanical system, the lever frame causes the ball bearing to squeeze towards the impeller to compensate for the axial thrust. The sensor also monitors and calculates the comprehensive health coefficient in real time to provide fault warning.

Benefits of technology

It achieves reduced pump size, lower cost, lower energy consumption, and improved axial stability. It can detect microscopic elastic strain at an early stage, realizing a comprehensive leap from macroscopic alarm to microscopic early warning, and improving the operational reliability and intelligence level of centrifugal pumps.

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Abstract

The invention belongs to the technical field of centrifugal pumps, and particularly relates to a single-stage single-suction centrifugal pump which comprises a pump body, a driving shaft and an impeller of a single-suction structure, a cavity is formed in the pump body, an inlet is formed in the position, located on the liquid inlet side of the impeller, of the cavity, a back opening is formed in the position, located on the other side of the impeller, of the cavity, a plurality of balance holes are formed in the impeller, and a plurality of lever frames are rotationally installed in the back opening. A blade plate corresponding to the balance hole in position is fixed to one end of the lever frame, a rolling ball is arranged at the other end of the lever frame, the circumferential area, corresponding to the rolling ball, of the side wall of the impeller is arranged to be a plane, reverse thrust generated in the balance hole is not enough to counteract axial thrust of the main shaft, the pressure difference of the balance hole is increased, and the flow speed and impact force of liquid flowing out of the balance hole are increased. The rolling ball presses and applies force towards the impeller direction through the lever frame. The lever frame enables the rolling ball to extrude and apply force towards the direction of the impeller, so that the defect of hydraulic balance is compensated, the axial thrust is balanced through the mechanical action, and the stability of the driving shaft and the impeller in the axial direction is guaranteed.
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