A multi-stage centrifugal pump guide vane assembly and a multi-stage centrifugal pump

By using a hexagonal interlocking design for the drive shaft, impeller shaft, and connecting socket, combined with the interlocking of the reinforcing sleeve and retaining ring, the problem of cumbersome disassembly of multi-stage centrifugal pumps is solved, achieving simplified installation, improved connection stability, and prevention of liquid leakage.

CN224315221UActive Publication Date: 2026-06-02
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Filing Date
2025-08-15
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

The existing method of fixing the motor drive shaft and impeller of multi-stage centrifugal pumps is cumbersome, the disassembly process is complicated and the operating space is limited, which affects maintenance efficiency.

Method used

It adopts a design of drive shaft, impeller shaft and connecting socket, and uses the fitting of regular hexagonal plug and socket to achieve synchronous rotation. Combined with the fitting of reinforcing sleeve, limiting sleeve and retaining ring, it simplifies the installation and disassembly process and enhances connection stability.

Benefits of technology

It simplifies the installation and disassembly process of the impeller mechanism, improves power transmission efficiency and connection stability, prevents liquid leakage, and enhances maintenance efficiency.

✦ Generated by Eureka AI based on patent content.

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Abstract

This utility model discloses a multi-stage centrifugal pump guide vane assembly and a multi-stage centrifugal pump, including a centrifugal pump body. The centrifugal pump body is generally divided into a motor and an impeller mechanism. A drive shaft is fitted and connected to the end of the motor near the impeller mechanism, and a reinforcing sleeve is fitted and connected to the outer side of the drive shaft. An impeller shaft is fitted and connected to the end of the impeller mechanism near the motor. A threaded sleeve is fixedly installed on the outer surface of the impeller shaft, and a connection port is opened on the inner side of the threaded sleeve. A plug is fixedly connected to the end of the drive shaft near the impeller shaft. The reinforcing sleeve has a connecting thread inside. By setting the drive shaft, impeller shaft, and connection port, this device improves the power transmission efficiency and simplifies the docking and installation process between the motor and the impeller mechanism. Furthermore, by setting the reinforcing sleeve, limiting sleeve, and retaining ring, the connection stability between the drive shaft and the impeller shaft is enhanced by limiting the axial displacement of the retaining ring after docking.
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