A method for measuring the surface temperature of a high-temperature resistant non-metallic structure

Abstract

This application belongs to the field of high-temperature resistant non-metallic structure surface temperature measurement technology for aircraft, specifically relating to a method for measuring the surface temperature of high-temperature resistant non-metallic structures. The method includes: Step 1, applying a high-temperature resistant, conductive, and weldable metal film to the surface of the high-temperature resistant non-metallic structure using a cold spraying process to create the basic conditions for thermocouple welding; Step 2, welding a thermocouple onto the metal film to measure the temperature of the high-temperature resistant non-metallic structure surface. This method allows for reliable welding of thermocouples to the surface of the high-temperature resistant non-metallic structure without damaging the structure itself, enabling effective and accurate measurement of the surface temperature of the high-temperature resistant non-metallic structure, and supporting the measurement of the surface temperature of high-temperature resistant non-metallic structures on aircraft.

Description

Technical Field

[0001] This application belongs to the field of surface temperature measurement technology for high-temperature resistant non-metallic structures in aircraft, and specifically relates to a method for measuring the surface temperature of high-temperature resistant non-metallic structures. Background Technology

[0002] With technological advancements, various high-temperature resistant non-metallic materials, such as high-temperature ceramics and graphite, are increasingly being used in aircraft structures. To determine the temperature distribution within an aircraft, it is typically necessary to measure the temperature of various structural surfaces.

[0003] Currently, thermocouples are mostly embedded into the aircraft structure by bonding, welding, or drilling to measure temperature. This method is well-suited for measuring the surface temperature of aircraft metal structures, but it is not well-suited for measuring the surface temperature of high-temperature resistant non-metallic structures. For example, bonding is not reliable enough in high-temperature and vibration environments, welding is completely unsuitable, and drilling can cause extremely serious damage to the structure.

[0004] In view of the aforementioned technical deficiencies, this application is hereby filed. Summary of the Invention

[0005] The purpose of this application is to provide a method for measuring the surface temperature of a high-temperature resistant non-metallic structure, used to measure the temperature of the surface of a high-temperature resistant non-metallic structure on an aircraft, so as to overcome or mitigate at least one of the known technical defects.

[0006] The technical solution of this application is:

[0007] A method for measuring the surface temperature of a high-temperature resistant non-metallic structure, comprising:

[0008] Step 1: Using a cold spraying process, a high-temperature resistant, conductive, and weldable metal film is sprayed onto the surface of a high-temperature resistant non-metallic structure to form the basic conditions for thermocouple welding.

[0009] Step 2: Weld thermocouples onto the metal film to measure the temperature of the high-temperature resistant non-metallic structure surface.

[0010] According to at least one embodiment of this application, in the above-described method for measuring the surface temperature of a high-temperature resistant non-metallic structure, in step one, the area of ​​the high-temperature resistant non-metallic structure surface coated with a metal film is subjected to sandblasting surface treatment to increase the surface roughness.

[0011] According to at least one embodiment of this application, in the above-described method for measuring the surface temperature of a high-temperature resistant non-metallic structure, in step one, a softer metal underlayer is cold-sprayed onto the area of ​​the high-temperature resistant non-metallic structure surface to which a metal film is sprayed, and the metal film is sprayed onto the metal underlayer.

[0012] According to at least one embodiment of this application, in the above-described method for measuring the surface temperature of a high-temperature resistant non-metallic structure, the metal film material is selected as NiCoCrAlTaY material.

[0013] The metal base layer is a titanium alloy base layer.

[0014] According to at least one embodiment of this application, in the above-described method for measuring the surface temperature of a high-temperature resistant non-metallic structure, the high-temperature resistant non-metallic structure is a high-temperature resistant ceramic or graphite structure used in aircraft.

[0015] According to at least one embodiment of this application, in the above-described method for measuring the surface temperature of a high-temperature resistant non-metallic structure, the thickness of the metal film is 0.3~0.6 mm.

[0016] This application has at least the following beneficial technical effects:

[0017] A method for measuring the surface temperature of a high-temperature resistant non-metallic structure is provided. Thermocouples can be reliably welded to the surface of the high-temperature resistant non-metallic structure without damaging the structure. The thermocouples enable effective and accurate measurement of the surface temperature of the high-temperature resistant non-metallic structure, which can support the measurement of the surface temperature of high-temperature resistant non-metallic structures on aircraft. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the surface temperature measurement method for high-temperature resistant non-metallic structures provided in the embodiments of this application.

[0019] To better illustrate this embodiment, some content in the accompanying drawings may be omitted, enlarged, or reduced. They are for illustrative purposes only and should not be construed as limiting the scope of this application. Detailed Implementation

[0020] To make the technical solution and advantages of this application clearer, the technical solution of this application will be described in a clearer and more complete manner below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some embodiments of this application, and are only used to explain this application, not to limit this application. It should be noted that, for ease of description, only the parts related to this application are shown in the accompanying drawings, and other related parts can be referred to the general design.

[0021] Furthermore, unless otherwise defined, the technical or scientific terms used in this application description shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The word "comprising" as used in this application description indicates that the concept preceding the word encompasses the concepts listed following the word and their equivalents, without excluding other related concepts.

[0022] Furthermore, the terms indicating location used in the description of this application are only used to indicate relative directions or positional relationships. When the absolute position of the described object changes, its relative positional relationship may also change accordingly. It should also be noted that, unless otherwise explicitly specified and limited, terms such as "installation" and "connection" used in the description of this application should be interpreted broadly. For example, a connection can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand its specific meaning in this application according to the specific circumstances.

[0023] A method for measuring the surface temperature of a high-temperature resistant non-metallic structure, the principle of which is as follows: Figure 1 As shown.

[0024] Step 1: Using a cold spraying process, a high-temperature resistant, conductive, and weldable metal film is sprayed onto the surface of a high-temperature resistant non-metallic structure to form the basic conditions for thermocouple welding. This allows thermocouples to be welded onto the surface for temperature measurement.

[0025] Cold spraying is a process that accelerates solid metal powder to a certain speed and achieves bonding between the solid metal powder and the substrate through intense plastic deformation. By using cold spraying, a metal film is sprayed onto the surface of a high-temperature resistant non-metallic structure. In other words, the cold spraying process combines solid metal powder with a high-temperature resistant non-metallic structure to form a metal film on the surface of the high-temperature resistant non-metallic structure.

[0026] When the surface of a high-temperature resistant non-metallic structure is relatively smooth, in order to increase the bonding effect between the cold-sprayed metal film and the surface of the high-temperature resistant non-metallic structure, the surface of the high-temperature resistant non-metallic structure can be sandblasted to increase the roughness of the surface of the high-temperature resistant non-metallic structure and improve the adhesion effect of the cold-sprayed metal powder.

[0027] The material selected for cold-sprayed metal film should have a coefficient of thermal expansion that is as close as possible to that of the high-temperature resistant non-metallic structure. NiCoCrAlTaY material is usually selected.

[0028] A softer metal underlayer, such as a titanium alloy underlayer, can be cold-sprayed onto the surface of a high-temperature resistant non-metallic structure. This ensures that the cold-sprayed metal film has good stability under high thermal stress in a high-temperature environment, preventing cracking and peeling.

[0029] Step 2: Weld thermocouples onto the metal film to measure the temperature of the high-temperature resistant non-metallic structure surface.

[0030] The thickness of the metal film should be 0.3~0.6mm, and should not be too thick, in order to ensure the accuracy of temperature measurement of the thermocouple on the surface of the high-temperature resistant non-metallic structure.

[0031] The high-temperature resistant non-metallic structure mentioned here can specifically refer to high-temperature resistant ceramics and graphite structures used in aircraft.

[0032] The high-temperature resistant non-metallic structure surface temperature measurement method disclosed in the above embodiments can reliably weld thermocouples to the surface of the high-temperature resistant non-metallic structure without damaging the structure, thereby enabling effective and accurate measurement of the surface temperature of the high-temperature resistant non-metallic structure using thermocouples. This method can support the measurement of the surface temperature of high-temperature resistant non-metallic structures on aircraft.

[0033] The technical solution of this application has been described in conjunction with the preferred embodiments shown in the accompanying drawings. Those skilled in the art should understand that the scope of protection of this application is obviously not limited to these specific embodiments. Without departing from the principles of this application, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the scope of protection of this application.

Claims

1. A method for measuring the surface temperature of a high-temperature resistant non-metallic structure, characterized in that, include: Step 1: Using a cold spraying process, a high-temperature resistant, conductive, and weldable metal film is sprayed onto the surface of a high-temperature resistant non-metallic structure to form the basic conditions for thermocouple welding. Step 2: Weld thermocouples onto the metal film to measure the temperature of the high-temperature resistant non-metallic structure surface.

2. The method for measuring the surface temperature of a high-temperature resistant non-metallic structure according to claim 1, characterized in that, In step one, the area on the surface of the high-temperature resistant non-metallic structure that is coated with a metal film is sandblasted to increase the surface roughness.

3. The method for measuring the surface temperature of a high-temperature resistant non-metallic structure according to claim 2, characterized in that, In step one, for the area on the surface of the high-temperature resistant non-metallic structure to be sprayed with a metal film, a softer metal underlayer is cold-sprayed onto the metal underlayer.

4. The method for measuring the surface temperature of a high-temperature resistant non-metallic structure according to claim 3, characterized in that, The metal film material selected is NiCoCrAlTaY material; The metal base layer is a titanium alloy base layer.

5. The method for measuring the surface temperature of a high-temperature resistant non-metallic structure according to claim 4, characterized in that, The high-temperature resistant non-metallic structure is a high-temperature resistant ceramic and graphite structure used in aircraft.

6. The method for measuring the surface temperature of a high-temperature resistant non-metallic structure according to claim 5, characterized in that, The thickness of the metal film is 0.3~0.6mm.

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