Icing sensor

An icing sensor and heater technology, applied in the sensor field, can solve the problems of loss of controllability, asymmetry of lift and tension, poor reliability, etc., and achieve the effects of reducing mental burden, not easy to fatigue and cracking, and long service life

CN107966216AActive Publication Date: 2018-04-27CHINA HANGFA SOUTH IND CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2018-04-27

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Abstract

An icing sensor comprises a base and an elbow which are mutually connected, wherein the base is internally provided with a controller, a pressure chamber and a tube root heater; the elbow is internally provided with a thermal resistance thermometer, a refrigeration element and a tube head heater; the pressure chamber is internally provided with a first vacuum chamber, a dynamic pressure chamber, astatic pressure chamber and a second vacuum chamber sequentially; a total pressure sensor silicon diaphragm is arranged between the first vacuum chamber and the dynamic pressure chamber; a differential pressure sensor silicon diaphragm is arranged between the dynamic pressure chamber and the static pressure chamber; and a static pressure sensor silicon diaphragm is arranged between the static pressure chamber and the second vacuum chamber. The icing sensor provided in the invention has the advantages of high sensitivity, good reliability and long service life. Through arranging the bismuth telluride semiconductor refrigeration element, the refrigeration amount can be controlled, icing is earlier than inlet guide vane icing, and icing damages can be predicted.
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Description

technical field

[0001] The invention relates to the technical field of sensors, in particular to an icing sensor used for an air intake of a turboprop engine. Background technique

[0002] my country's medium-sized turboprop transport aircraft is imitated and improved from the An-12 transport aircraft. Due to backward design technology, its safety and reliability performance lags behind the American C-130 medium-sized transport aircraft of the same level. It has crashed due to icing.

[0003] In terms of deicing and anti-icing technology research, the aircraft body has received more attention than the aeroengine. Ice and snow on the wings are easy to be observed, but maintenance work is common; engine intake icing is difficult to observe with the naked eye, and it comes and goes without a trace, and has not received enough understanding and attention.

[0004] At present, the anti-icing pressure annunciator of turboprop engine is still a mechanical annunciator with air pres...

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Embodiment Construction

[0016] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described with reference to the accompanying drawings. Wherein, the same parts adopt the same reference numerals.

[0017] figure 2 It is a schematic diagram of the structure and principle of the icing sensor according to a specific embodiment of the present invention; see figure 2 As shown, the present invention provides a kind of icing sensor, which includes a base 1 and an elbow 2 connected to each other, and the end of the elbow 2 is provided with 20 air inlet holes 21 with a diameter of 0.7mm. The side wall of the elbow 2 is provided with 8 static pressure holes 22 with a diameter of 2.5mm. The base 1 is provided with a controller 30, a pressure chamber 31, and a tube root heater 32. The inside of the elbow 2 is provided with The thermal resistance temperature measuring elemen...