A micro gas turbine integrated with a high-speed electric machine

By integrating the high-speed motor with the micro gas turbine rotor, eliminating the high-speed coupling, and employing oil-free suspension bearings and dual-path cooling airflow, the problems of complex micro gas turbine structure and high-temperature demagnetization are solved, achieving structural simplification and efficient cooling, and improving system reliability and efficiency.

CN122304865APending Publication Date: 2026-06-30SANYA MARINE OIL & GAS RESEARCH INSTITUTE NORTHEAST PETROLEUM UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SANYA MARINE OIL & GAS RESEARCH INSTITUTE NORTHEAST PETROLEUM UNIVERSITY
Filing Date
2026-04-03
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

Existing micro gas turbines use high-speed motors for direct drive, which makes the design, processing and assembly of the system rotor difficult, and requires high-speed couplings, resulting in complex structures, high costs and inconvenient maintenance.

Method used

The design integrates a high-speed motor rotor and a micro gas turbine rotor, omitting the high-speed coupling. It adopts oil-free floating bearings, arc-shaped end face tooth connections, and dual-path cooling airflow, simplifying the structure and improving cooling efficiency.

Benefits of technology

The simplified structure reduces design and manufacturing complexity, lowers costs, improves reliability and ease of maintenance, avoids high-temperature demagnetization of magnets, and enhances system efficiency and reliability.

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Abstract

This invention discloses a micro gas turbine integrated with a high-speed motor, belonging to the field of gas turbine technology. It includes a high-speed motor, with a compressor and a turbine mounted on opposite sides. A combustion chamber is located on one side of the turbine. The high-speed motor comprises a stator and a rotor. The stator is mounted on the motor's housing, and the rotor includes a central shaft with magnets mounted on its outer side. Bearings are mounted on both sides of the central shaft. This invention employs a micro gas turbine integrated with a high-speed motor, using an integrated design that eliminates the need for a high-speed coupling. This simplifies the structure, reduces size, improves reliability, lowers the design, processing, and assembly difficulty of the rotor system, reduces costs, and facilitates maintenance. The invention also incorporates dual-path cooling air, end-face teeth, and a cooling plate to reduce the temperature rise of the central shaft and the motor magnets, preventing magnet demagnetization due to high temperatures.
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