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Detection and tracking of damage or impact of a foreign object on an aircraft engine fan

一种风机、引擎的技术，应用在航空引擎领域，能够解决叶片损坏、叶片分层、损坏等问题

Active Publication Date: 2014-12-10
SN DETUDE & DE CONSTR DE MOTEURS DAVIATION (S N E C M A)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In flight, foreign objects or parts detached from the turbojet engine may be ingested by the turbojet engine and may cause damage inside it
Delamination of blades may occur over time due to manufacturing defects
In conclusion, objects hitting the fan blades risk damaging the blades

Method used

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  • Detection and tracking of damage or impact of a foreign object on an aircraft engine fan
  • Detection and tracking of damage or impact of a foreign object on an aircraft engine fan

Examples

Experimental program
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Effect test

Embodiment Construction

[0024] figure 1 is an illustration of a system of a first embodiment of the present invention, the system including a fan for an aeroengine.

[0025] The fan 1 comprises a rotor 2 with blades 3 .

[0026] The engine is, for example, a turbojet engine comprising a fan 1 , a low-pressure compressor, a high-pressure compressor, a combustion chamber, a high-pressure turbine and a low-pressure turbine. In one embodiment, the fan 1 is a non-ducted fan (also known as an open rotor).

[0027] The blade 3 is made of woven composite material. They thus include woven fibres. A person skilled in the art knows how to make such a blade, so a detailed description of the blade is not given here. Furthermore, those skilled in the art are aware of techniques to enable the incorporation of optical fibers during weaving in order to be able to monitor the temperature of the resin as it is being injected into the mould. In the fan 1 , the blades 3 thus comprise optical fibers 4 .

[0028] The...

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PUM

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Abstract

The invention relates to a system for detecting a deformation on a fan (1) for an aircraft engine comprising a rotor (2) equipped with a plurality of blades (3) made of a composite material including woven fibres. This system is noteworthy in that at least one of the fibres of each of the blades (3) is an optical fibre (4) comprising at least one portion defining a Bragg grating, the system furthermore comprising an emitter / receiver (6) linked to the optical fibre (4) and able to send an optical signal down this optical fibre (4) and to receive in response an optical signal from the optical fibre (4) and a detection module (7, 17) linked to the emitter / receiver for detecting a deformation on the fan (1, 11) when the optical signal received exhibits a correlation with a predetermined signature of a damped shock on a blade at a determined rotation speed. This deformation may arise from an impact of a foreign object on a blade of the fan or be consequent upon the development of an internal defect.

Description

technical field [0001] The invention relates to the field of aero-engines. The invention relates more particularly to the detection of deformations of fan blades, for example due to the ingestion of objects by an aircraft turbojet engine while in flight. Background technique [0002] In flight, foreign bodies or components detached from the turbojet may be ingested by the turbojet and may cause damage inside it. It is possible for manufacturing defects to cause blade delamination over time. In conclusion, objects hitting the fan blades risk damaging the blades. [0003] For damage due to the ingestion of foreign objects (eg birds) by the turbojet engine, the term used is foreign object damage (FOD). For damage due to turbojet engine ingestion of detached parts (eg rivets, bolts, etc.), the term is damage to internal objects (DOD). Ingestion of foreign objects (FOD) constitutes a major cause of flight delays or cancellations, as the shock is generally not felt by pilots d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01D5/28F01D17/02F04D29/32G01L1/24
CPCF01D17/02F04D29/324G01M5/0016F01D5/282F01D21/003Y02T50/672G01M5/0033F05D2300/603F05D2270/804G01M5/0091F05D2260/80F04D27/001Y02T50/60F04D19/002G01B11/18G01D5/353
Inventor 大卫·托林皮埃尔·费尔迪南德瓦莱里奥·杰雷斯安德鲁·莱罗克斯
Owner SN DETUDE & DE CONSTR DE MOTEURS DAVIATION (S N E C M A)
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