Stator support for fan shaft driven by gearbox in turbines

By optimizing the fluid circuit layout and sealing design of the stator structure, the radial compactness problem of the fan bearing support in the turbine was solved, achieving optimized compatibility between the fan disc and the bearing and improved fluid transport efficiency.

CN116249825BActive Publication Date: 2026-05-26SAFRAN AIRCRAFT ENGINES SAS
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SAFRAN AIRCRAFT ENGINES SAS
Filing Date
2021-09-24
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

In existing turbines, the stator support structure of the gearbox-driven fan shaft results in radial compactness limitations between the fan disc and the bearing, making it difficult to optimize axial and radial clearances and affecting the design and displacement compatibility of the fan blades.

Method used

A stator structure was designed, including a support and a flange. By optimizing the layout of the fluid circuit through channels and sealing grooves distributed in the circumferential direction, the radial space requirement is reduced. The correct angular position of the flange and the support is ensured by the error prevention device, so as to achieve effective fluid delivery and isolation.

Benefits of technology

It achieves compatibility optimization between the fan disc and the bearing, reduces the radial space requirement of the stator structure, improves fluid delivery efficiency and sealing effect, and enhances the design freedom of the fan blades.

✦ Generated by Eureka AI based on patent content.

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  • Figure CN116249825B_ABST
    Figure CN116249825B_ABST
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Abstract

A stator structure (22) extending about the axis of a turbine and comprising: - a support (50) having an inner surface centered on the axis, and - a flange (60) defining an air enclosure (A2) and having an outer surface centered on the axis, the support (50) extending about the flange (60) such that the inner and outer surfaces face each other, the structure (22) defining an oil circuit and an air circuit formed by upstream passages (64, 65) and downstream passages (54, 55), - each upstream passage (64, 65) defining an outer opening in the outer surface, - each downstream passage (54, 55) defining an inner opening in the inner surface, each circuit being oriented between the outer and inner openings along a direction including a component radial to the axis.
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