Film temperature sensor for turbine blades of aero-engine

Abstract

The invention discloses a film temperature sensor for turbine blades of an aero-engine. The film temperature sensor comprises a transition layer, a thermal growing layer, an insulating layer and a thermocouple layer which are sequentially connected, wherein the thermocouple layer is formed by lapping a first thermocouple and a second thermocouple through one end part, and the lapping part forms athermal connecting point which is a measuring end; an outgoing conductor is a fine wire which has the same quality as the first thermocouple and the second thermocouple; and the outgoing conductor iscorrespondingly connected to the other end part of each of the first thermocouple and the second thermocouple through high-temperature conductive glue. According to the film temperature sensor for theturbine blades of the aero-engine, a film layer structure of the sensor is specially designed for the aero-engine in a high-temperature severe environment; the film sputtering, annealing and other preparation technologies are optimized; the ion deposition technology is carried out to directly deposit a plurality of layers of films on the surfaces of the turbine blades, and thus the function and structure integrated film sensor is obtained; the adhesion strength of the film layers is improved; the problems such as high-temperature insulating of the film layer, separating and signal exporting can be solved; and the total thickness of the film sensor is less than 25 microns, and the maximum measurement temperature is 1100 DEG C.

Description

technical field [0001] The invention belongs to the field of temperature measurement technology and sensor technology, and in particular relates to a thin film temperature sensor for high temperature measurement and a preparation method thereof. Background technique [0002] With the development of aerodynamic technology, the temperature of the engine continues to increase, resulting in a substantial increase in the temperature borne by the turbine blades, which directly affects the reliable working life of the turbine blades at high temperatures, making accurate measurement of the temperature of hot components such as turbine blades an important task. The key issue. Accurate measurement of turbine blade temperature helps to verify cooling efficiency as well as performance of thermal barrier coatings and prevent over-temperature damage of turbine blades. Accurately measuring the surface temperature of hot-end parts plays an important role in correctly evaluating its cooling...

AI Technical Summary

Problems solved by technology

The traditional thermocouple temperature measurement method can only measure the temperature after the measured object and the temperature sensor reach thermal equilibrium, and has a long response time. It is not suitable for measuring the temperature of fast-changing temperature or small targets, and will cause damage to the structure of the turbine blade. , has a certain influence on the distribution of the target temperature field

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