A type of injection-molded water pump magnetic rotor

By using injection molding technology to integrate the magnetic ring and the bushing, and using carbon fiber reinforced polyphenylene sulfide bushing with interlocking ribs, the coaxiality and slippage problems of traditional magnetic rotors are solved, the processing accuracy and connection stability are improved, and the manufacturing process is simplified.

CN224453108UActive Publication Date: 2026-07-03JIANGMEN WEBBER ELECTRONIC TECHNOLOGY CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
JIANGMEN WEBBER ELECTRONIC TECHNOLOGY CO LTD
Filing Date
2025-09-08
Publication Date
2026-07-03

AI Technical Summary

Technical Problem

Traditional magnetic rotors have a split installation structure, which makes it impossible to guarantee the coaxiality installation requirements. The machining and assembly accuracy are insufficient, and the rotor and bushing slip during high-speed rotation. In addition, the preparation of graphite bushings is complicated and cumbersome.

Method used

The magnetic ring and the bushing are integrally molded by injection molding. The bushing is made of carbon fiber reinforced polyphenylene sulfide, and the outer wall of the bushing is provided with ribs that mesh with the inner wall of the rotor connecting sleeve to form a mechanical interlock. The impeller cover and the impeller seat are connected by ultrasonic welding.

Benefits of technology

It improves preparation efficiency, eliminates assembly tolerances, enhances connection stability, avoids slippage during high-speed rotation, simplifies the preparation process, and reduces reliance on lubricating grease.

✦ Generated by Eureka AI based on patent content.

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Abstract

This utility model relates to the field of magnetic rotor technology and discloses an injection-molded water pump magnetic rotor, including a magnetic ring, a bushing, a rotor body, and an impeller cover. The rotor body includes a rotor connecting sleeve and an impeller seat. The impeller seat is located on the top of the rotor connecting sleeve, and the impeller cover is connected to the impeller seat. The magnetic ring is fitted and fixed to the outer periphery of the rotor connecting sleeve. The outer periphery of the bushing is provided with ribs. The inner wall of the rotor connecting sleeve matches the shape of the outer wall of the bushing. The bushing is a carbon fiber reinforced polyphenylene sulfide bushing. The bushing is injection molded, and the rotor body is injection molded and fixedly connected between the magnetic ring and the bushing. This utility model can improve manufacturing efficiency, eliminate assembly tolerances, and improve the connection stability between various components. The ribs on the outer wall of the bushing mesh with the inner wall of the rotor connecting sleeve to form a mechanical interlock, effectively constraining the displacement of the bushing in the axial and radial directions and avoiding slippage during high-speed rotation. The carbon fiber reinforced polyphenylene sulfide bushing is injection molded, which is simple to manufacture and has a self-lubricating effect.
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