Armored thermocouple sensor

Abstract

The invention relates to an armored thermocouple sensor, which includes a nozzle, a first bushing, an armored thermoelectric pole, an outer sleeve, a flange plate, a second bushing, a saddle-shaped elastic washer, an insulating base, an installation disk, a nut, a washer and a wiring terminal; the armored thermoelectric pole is of a cylindrical rod-like structure, the first bushing is arranged on the outer circular face at one end and stretches out of the first bushing, and both the armored thermoelectric pole and the first bushing are pressed tight in a six-side pressing mode. The nozzle is installed on the outer side of the first bushing through argon arc welding, and the outer side of the armored thermoelectric pole is provided with the outer sleeve in a welded mode. On the premise of ensuring that the temperature measurement function of a sensor is unchanged, the armored thermocouple sensor improves the strength and vibration resistance, avoids the problems of oil contamination and carbon deposition, and ensures that the structural strength of a sensor body has excellent vibration resistance; the glass sintering package structure design meets the sealing requirements on the sensor, and ensures the insulation of the armored thermoelectric pole.

Description

technical field [0001] The invention relates to a thermocouple sensor, in particular to a thermocouple sensor which utilizes welding and glass sintering packaging technology to realize the fixing and sealing of armored thermal electrodes. Background technique [0002] At present, the measurement of the exhaust temperature of domestic aero-engines mostly uses assembled thermocouple sensors. This type of sensor uses a thermal electrode combined with nickel-chromium and nickel-silicon alloy wire as the temperature-sensing element. The temperature-sensing element is sintered with the sensor's metal shell and The internal ceramic insulating tube is assembled and fixed to realize the temperature measurement function of the sensor. Due to the influence of domestic materials and processing technology, this type of sensor has low inherent reliability, and it is difficult to solve problems such as open circuit, excessive insulation resistance, and failure of porcelain tube structure i...

AI Technical Summary

Problems solved by technology

Due to the influence of domestic materials and processing technology, this type of sensor has low inherent reliability, and it is difficult to solve problems such as open circuit, excessive insulation resistance, and failure of porcelain tube structure in the long-term use. With the improvement of aero-engine performance, The temperature and vibration environment are becoming increasingly severe, and the assembled thermocouple sensor has been difficult to meet the requirements of the engine

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