Forming method of triangular film thermocouple

Abstract

The invention discloses a triangular film thermocouple forming method, and belongs to the technical field of motors. The forming method of the triangular film thermocouple comprises the following steps: A, integrating a thermocouple with an aluminum oxide ceramic substrate into a single piece; b, packaging two ultrathin aluminum oxide ceramic chips with the same triangular structure between the ultrathin aluminum oxide ceramic chips through a high-temperature sealing material to form a'sandwich 'structure; c, performing medium thick film physical isolation protection on the surface of the temperature sensing point; then the sandwich structure is assembled into a protective ceramic tube; and D, finally, assembling the thin film thermocouple into a metal shell with a hole to form a thin film thermocouple product. According to the forming method, the temperature sensing point of the thermocouple is arranged at the vertex angle of the triangle by utilizing the triangular structure design, so that the characteristic that the thermal capacity of the temperature sensing point is small, namely the physical volume of the temperature sensing point is small can be achieved, and the technical requirement on quick response of the sensor is ensured. Meanwhile, due to the triangular structure design of the thermocouple chip, the capability of resisting environmental vibration and hot airflow impact can be achieved to the maximum extent, and the strong design of the sensor structure is achieved.

Description

technical field [0001] The invention relates to a forming method of a triangular thin film thermocouple, belonging to the technical field of electromechanical. Background technique [0002] Thin-film thermocouple temperature measurement is a common method to obtain real-time temperature data of high-temperature components of aero-engine. This technology can effectively avoid overheating of aircraft engine blades and provide data support for engine design. The appearance of various thin film thermocouples often varies according to needs, but their basic structure is roughly the same, usually composed of main components such as thermode, insulating sleeve protection tube and junction box, usually with display instruments, recording instruments and electronic Use with the regulator. In industrial production processes, temperature is one of the important parameters that need to be measured and controlled. In temperature measurement, thermocouples are widely used. It has the ...

AI Technical Summary

Problems solved by technology

[0003] The existing thermocouple molding process is complex and cannot effectively improve the performance of thermocouples

[0004] Existing bond coatings are usually very thick, at least tens of microns, which affects the heat transfer efficiency

Excessive thickness will make thermal equilibrium between the bond coat of the thermocouple membrane and the workpiece surface more difficult, and measurement of transient temperatures impossible

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