Complete machine optical fiber lead structure for turbine rotor blade temperature and vibration stress measurement, assembly method and measurement system

By designing the optical fiber lead structure of the whole machine, including rotor leads, smooth ring positioning and adaptation and static leads, the signal transmission instability in the measurement of the temperature and vibration stress of the turbine rotor blades of small aircraft engines is solved, and efficient and reliable measurement results are achieved.

CN119575578AActive Publication Date: 2025-03-07INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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Patent Information

Application Number
CN202510130912.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-02-06
Publication Date
2025-03-07
Estimated Expiration
2045-02-06

AI Technical Summary

Technical Problem

In the measurement of temperature and vibration stress of turbine rotor blades of small aircraft engines, traditional methods have problems such as high temperature, high speed and limited structural space, which leads to unstable signal transmission of optical fiber leads and is difficult to achieve comprehensive measurement.

Method used

A whole machine optical fiber lead structure is designed, including a rotor lead structure, a smooth ring positioning and adaptation structure and a stator lead structure. Through these structures, the smooth leads of the optical fiber from the turbine rotor blade to the outer wall of the engine are realized to ensure reliable signal transmission.

Benefits of technology

This structure solves the problems of limited engine rotor size and incoordinated rotor deformation, improves the survival rate of fiber leads and the reliability of measurement signals, and realizes accurate measurement of turbine blade temperature and vibration stress.

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Abstract

The invention discloses a whole machine optical fiber lead structure for turbine rotor blade temperature and vibration stress measurement, an assembly method and a measurement system, and relates to the technical field of temperature and vibration stress testing. The optical fiber lead structure comprises a rotor lead structure section, a smooth ring positioning and switching structure section and a stator lead structure section, wherein the rotor lead structure section comprises a blade-disc rear transition structure, a disc rear-shaft inner transition structure and a shaft inner lead channel; the smooth ring positioning and switching structure section comprises a front shaft end nut rotating structure and a stator positioning structure; the stator lead structure segment leads the optical fiber to the outer wall of the engine based on the hollow support plate. The assembling method comprises the steps of optical fiber laying, lead wire connection, smooth ring positioning and assembling, stator lead wire leading-out, whole machine debugging and the like. According to the invention, the problems of limited radial and axial sizes of the engine rotor, inconsistent rotor and stator deformation and smooth surface transition of the optical fiber lead are solved, and the survival rate of the optical fiber lead of the whole engine is improved.
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