Combustion chamber outlet temperature measuring device installation method

Abstract

The invention provides a mounting method of a combustion chamber outlet temperature measuring device. The mounting method comprises the following steps: processing a containing groove in the surface of a support; the flame spraying equipment is started, a spray gun of the flame spraying equipment moves at a constant speed in the length direction of the containing groove, the base coating is sprayed out of the spray gun, and the base coating forms a base layer in the containing groove; providing a thermocouple, fixedly connecting the thermocouple with the wire, and placing the wire on the surface of the substrate layer; the flame spraying equipment is started, a spray gun of the flame spraying equipment moves at a constant speed in the length direction of the containing groove, the surface layer coating is sprayed out of the spray gun, and the surface layer coating forms a covering layer; the support is fixedly connected to the outlet of the combustion chamber, and the containing groove faces the outlet of the combustion chamber. According to the technical scheme, the substrate material and the surface layer coating are both made of ceramic materials, the ceramic manufacturing process is simple, the cost is low, the ceramic can be widely applied to industrial production conveniently, the ceramic has insulativity, and it is guaranteed that temperature data obtained through thermocouple monitoring are accurate and reliable.

Description

Technical Field

[0001] The present invention relates to the technical field of aviation engines, and in particular to a method for installing a combustion chamber outlet temperature measuring device. Background Art

[0002] During the operation of an aircraft engine, the temperature of the combustion chamber is an important monitoring indicator. Thermocouples are common temperature measuring elements. When monitoring the combustion chamber temperature, thermocouples are generally installed at the combustion chamber outlet. However, the temperature inside the combustion chamber is extremely high. Sometimes the temperature at the outlet of the aircraft engine combustion chamber can reach 1600K. The data obtained by thermocouple monitoring needs to be transmitted to the background computer through wires. Conventional wires do not have high temperature resistance. Therefore, corresponding protection measures need to be taken for the thermocouple wires and corresponding protection structures need to be set up.

[0003] For example, patent document CN113373409B discloses a temperature-controlled thermocouple protection tube and a method for preparing a coating therefor. The temperature-controlled thermocouple protection tube comprises a substrate and a coating coated on the surface of the substrate. The coating is prepared by: pre-treating the surface of the temperature-controlled thermocouple protection tube to obtain a clean surface; sealing the temperature-controlled thermocouple protection tube and introducing liquid nitrogen into the interior of the temperature-controlled thermocouple protection tube; mounting the temperature-controlled thermocouple protection tube on a rotating fixture and activating the rotating fixture, which drives the temperature-controlled thermocouple protection tube to rotate at high speed; and performing micro-arc ion ultrasonic deposition on the outer surface of the temperature-controlled thermocouple protection tube using an amorphous alloy electrode as the material to obtain a wear-resistant, corrosion-resistant, and anti-static accumulation coating for the temperature-controlled thermocouple protection tube. Using this patented technical solution, the coating can prevent static electricity accumulation and corrosive wear. However, the coating material preparation process is complex, difficult, and expensive, making it difficult to widely promote and apply. Summary of the Invention

[0004] In order to solve the above technical problems, the present invention provides a method for installing a combustion chamber outlet temperature measuring device.

[0005] The present invention is achieved through the following technical solutions.

[0006] The present invention provides a method for installing a combustion chamber outlet temperature measuring device, comprising the following steps:

[0007] Step 1: providing a support and cutting a receiving groove on the surface of the support;

[0008] Step 2: Providing a flame spraying device; the flame spraying device includes a spray gun, starting the flame spraying device, and moving the spray gun at a constant speed from one side of the receiving tank to the other side of the receiving tank along the length direction of the receiving tank, while spraying the base coating from the spray gun, and the base coating condenses in the receiving tank to form a base layer;

[0009] Step 3: providing a thermocouple, wherein the thermocouple is fixedly connected to a wire, and the wire is placed on the surface of the base layer;

[0010] Step 4: starting the flame spraying equipment, moving the spray gun at a constant speed from one side of the receiving tank to the other side of the receiving tank along the length direction of the receiving tank, and spraying the surface coating from the spray gun. The surface coating condenses to form a covering layer, and the wire is buried between the base layer and the covering layer.

[0011] Step 5: Fix the support to the outlet of the combustion chamber, and make the receiving groove face the outlet of the combustion chamber.

[0012] The substrate material is ceramic.

[0013] The topcoat is ceramic.

[0014] The method for installing the combustion chamber outlet temperature measuring device also includes the following steps: when performing step one, providing a positioning seat, and cutting a guide hole on the surface of the positioning seat, the positioning seat is fixedly connected to the support, and the guide hole is connected to the accommodating groove; when performing step three, the wire is also passed through the guide hole.

[0015] The positioning seat and the support are formed in one piece.

[0016] The positioning seat is in the shape of a rectangular block.

[0017] The method for installing the combustion chamber outlet temperature measuring device also includes the following steps: when performing step one, providing a protective tube, and fixing one end of the protective tube in the guide hole, and extending the other end of the protective tube outward; when performing step three, passing the wire through the protective tube.

[0018] The material of the protective tube is stainless steel or high-temperature resistant alloy steel.

[0019] The length direction of the accommodating groove is a fold line having been bent at least twice.

[0020] The number of the accommodating grooves is more than 3.

[0021] The beneficial effects of the present invention are as follows: by adopting the technical solution of the present invention, both the base material and the surface coating are made of ceramic materials, the ceramic manufacturing process is simple and the cost is low, and both the base material and the surface coating are sprayed by a flame spraying process, the flame spraying process is simple to operate and is convenient for wide application in industrial production, and the ceramic has insulating properties, ensuring that the temperature data obtained by thermocouple monitoring is accurate and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the combustion chamber outlet temperature measuring device of the present invention.

[0023] In the figure: 1-support, 2-accommodating groove, 3-thermocouple, 4-positioning seat, 5-protective tube. DETAILED DESCRIPTION

[0024] The technical solution of the present invention is further described below, but the scope of protection claimed is not limited to the description.

[0025] like Figure 1 As shown, the present invention provides a method for installing a combustion chamber outlet temperature measuring device, comprising the following steps:

[0026] Step 1: Provide a support 1 and cut a receiving groove 2 on the surface of the support 1;

[0027] Step 2: Provide flame spraying equipment; the flame spraying equipment includes a spray gun. Start the flame spraying equipment and move the spray gun at a constant speed from one side of the receiving tank 2 to the other side of the receiving tank 2 along the length direction of the receiving tank 2. At the same time, the base coating is sprayed from the spray gun. The base coating condenses in the receiving tank 2 to form a base layer.

[0028] Step 3: providing a thermocouple 3, the thermocouple 3 is fixedly connected to a wire, and the wire is placed on the surface of the base layer;

[0029] Step 4: Start the flame spraying equipment and move the spray gun at a constant speed from one side of the receiving tank 2 to the other side of the receiving tank 2 along the length direction of the receiving tank 2. At the same time, the surface coating is sprayed from the spray gun. The surface coating condenses to form a covering layer, and the wire is buried between the base layer and the covering layer.

[0030] Step 5: Fix the support 1 to the outlet of the combustion chamber, and make the receiving groove 2 face the outlet of the combustion chamber.

[0031] By adopting the technical solution of the present invention, ceramic materials are used for both the base material and the surface coating. The ceramic manufacturing process is simple and low-cost, and the base material and the surface coating are both sprayed by a flame spraying process. Flame spraying refers to a process in which the material is melted by the high temperature of a gas combustion flame and then sprayed onto the surface of the workpiece using a compressed air flow to form a coating. The flame spraying process is simple to operate and is convenient for widespread application in industrial production. Ceramics have insulating properties, ensuring that the temperature data obtained by thermocouple monitoring is accurate and reliable.

[0032] In addition, the base material is preferably ceramic. The surface coating is ceramic. The method for installing the combustion chamber outlet temperature measuring device also includes the following steps: during step one, a positioning seat 4 is provided, and a guide hole is machined on the surface of the positioning seat 4. The positioning seat 4 is fixedly connected to the support 1, and the guide hole is connected to the receiving groove 2; during step three, a wire is also passed through the guide hole. The positioning seat 4 and the support 1 are integrally formed. The positioning seat 4 is a rectangular block.

[0033] The combustion chamber outlet temperature measuring device installation method further includes the following steps: During step 1, a protective tube 5 is provided, one end of the protective tube 5 being fixedly attached to the guide hole, with the other end of the protective tube 5 extending outward; during step 3, a wire is passed through the protective tube 5. Preferably, the protective tube 5 is made of stainless steel or high-temperature alloy steel. The length of the receiving groove 2 is a fold line having at least two bends. The number of receiving grooves 2 is at least three.

Claims

1. A method for installing a combustion chamber outlet temperature measuring device, characterized in that: The following steps are involved: Step 1: providing a support (1), and cutting a receiving groove (2) on the surface of the support (1); Step 2: providing a flame spraying device; the flame spraying device includes a spray gun, starting the flame spraying device, and moving the spray gun at a constant speed from one side of the containing tank (2) to the other side of the containing tank (2) along the length direction of the containing tank (2), while spraying a base coating from the spray gun, and the base coating condenses in the containing tank (2) to form a base layer; Step 3: providing a thermocouple (3), wherein the thermocouple (3) is fixedly connected to a wire, and the wire is placed on the surface of the base layer; Step 4: starting the flame spraying equipment, moving the spray gun at a constant speed from one side of the accommodating tank (2) to the other side of the accommodating tank (2) along the length direction of the accommodating tank (2), and simultaneously spraying the surface coating from the spray gun, the surface coating condensing to form a covering layer, and the wire being buried between the base layer and the covering layer; Step 5: Fix the support (1) to the outlet of the combustion chamber, and make the receiving groove (2) face the outlet of the combustion chamber.

2. The method for installing a combustion chamber outlet temperature measuring device according to claim 1, characterized in that: The substrate material is ceramic.

3. The method for installing a combustion chamber outlet temperature measuring device according to claim 1, wherein: The topcoat is ceramic.

4. The method for installing a combustion chamber outlet temperature measuring device according to claim 1, wherein: The method for installing the combustion chamber outlet temperature measuring device further includes the following steps: when performing step one, providing a positioning seat (4), and cutting a guide hole on the surface of the positioning seat (4), the positioning seat (4) is fixedly connected to the support (1), and the guide hole is connected to the accommodating groove (2); when performing step three, the wire is also passed through the guide hole.

5. The method for installing a combustion chamber outlet temperature measuring device according to claim 4, characterized in that: The positioning seat (4) and the support (1) are integrally formed.

6. The method for installing a combustion chamber outlet temperature measuring device according to claim 4 or 5, characterized in that: The positioning seat (4) is in the shape of a rectangular block.

7. The method for installing a combustion chamber outlet temperature measuring device according to claim 4, characterized in that: The method for installing the combustion chamber outlet temperature measuring device further comprises the following steps: when performing step one, providing a protective tube (5), and making one end of the protective tube (5) fixedly connected to the guide hole, and the other end of the protective tube (5) extending outward; when performing step three, also making the conductive wire pass through the protective tube (5).

8. The method for installing a combustion chamber outlet temperature measuring device according to claim 7, characterized in that: The material of the protective tube (5) is stainless steel or high-temperature resistant alloy steel.

9. The method for installing a combustion chamber outlet temperature measuring device according to claim 1, characterized in that: The length direction of the accommodating groove (2) is a fold line that has been bent at least twice.

10. The method for installing a combustion chamber outlet temperature measuring device according to claim 1 or 7, characterized in that: The number of the accommodating grooves (2) is more than 3.

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