PROPULSION ASSEMBLY FOR AN AIRCRAFT

The propulsion system's innovative blower housing design with two axial sections and a removable half-shell simplifies the dismantling of tulip-mounted blades, reducing maintenance time and costs.

FR3135748B1Active Publication Date: 2026-04-03SAFRAN AIRCRAFT ENGINES SAS
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Patent Information

Application Number
FR2022004859
Authority / Receiving Office
FR · FR
Patent Type
Patents
Current Assignee / Owner
Filing Date
2022-05-20
Publication Date
2026-04-03
Estimated Expiration
2042-05-20

AI Technical Summary

Technical Problem

The existing method for dismantling tulip-mounted blower blades in aircraft propulsion systems is lengthy and complex, leading to significant aircraft immobilization time and costs.

Method used

The propulsion system incorporates a blower housing with two axial sections, comprising two half-shells, one of which is removable, allowing blades to be dismantled without removing the fan from the turbomachine by radial translation through a space created by removing the second half-shell.

Benefits of technology

Facilitates the dismantling of blower blades, reducing the time and cost associated with maintenance operations by simplifying the process.

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Abstract

Propulsion assembly (54) for an aircraft, this propulsion assembly (54) comprising: - a gas generator, - a fan (24) located upstream of the gas generator, - a fan casing (26) extending around the fan (24), - a nacelle (58) extending around the fan casing (26) and at least a part of the gas generator, characterized in that the fan casing (26) comprises two axial sections, the upstream axial section comprising two half-shells (46a, 46b) whose circumferential ends are joined, each of these half-shells comprising a part of the external cylindrical wall (28) and a part of the abradable coating (30), a first of these half-shells being integral with the downstream axial section, and a second of these half-shells being removable and fixed at its circumferential ends to the circumferential ends of the first half-shell. Figure for the abbreviation: Figure 4
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