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Method for protecting air film hole and tail split joint hole of blade

A technology of air film holes and blades, which is applied to the supporting elements of blades, engine elements, machines/engines, etc., can solve the problems of small size, difficult protection of air film holes, chemical corrosion of alloy substrates, etc., and achieves simple operation and detection. And easy to repair, environmentally friendly effect

Active Publication Date: 2019-11-12
AECC AVIATION POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the mortise and tenon of turbine blades can be wax-sealed and protected by manually dipping in molten paraffin. Due to the large number of air film holes and tail splitting holes in the blade (up to 500 at most) and small size (generally The diameter is 0.3 ~ 1.0mm), it is difficult to effectively protect the air film hole by manual brushing or other mechanical methods, which leads to the acid solution passing through the air film hole or tail splitting hole when the coating on the surface of the blade is removed Entering the inner cavity of the blade, it will cause chemical corrosion to the alloy matrix and affect the performance of the blade

Method used

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  • Method for protecting air film hole and tail split joint hole of blade
  • Method for protecting air film hole and tail split joint hole of blade
  • Method for protecting air film hole and tail split joint hole of blade

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Experimental program
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Effect test

Embodiment approach 1

[0053] The blade protection process is as follows:

[0054] (1) Leaves 3-3 pre-treatment. Before protection, degrease the surface and inner cavity of the entire part, especially degrease the tenon 1-1, edge plate 1-2, air film hole 1-3, and split hole 1-4. The treatment method is: use acetone as the cleaning agent, soak the parts in the acetone solution, use the ultrasonic method to vibrate and clean for 10 minutes, then take it out and dry it with argon or compressed air;

[0055] (2) Paraffin preparation. The paraffin wax is melted by using a magnetic stirrer 3-4 with a heating function, the set temperature is 50° C., the magnetic stirring speed is controlled by a gradual pulse speed, and the control speed range is 5-100 rpm.

[0056] (3) Pressure-sensitive adhesive tape 2-1 protects the blade body 1-5. Use the pressure-sensitive adhesive tape 2-1 as the raw material for the protection of the blade body 1-5, paste the pressure-sensitive adhesive tape 2-1 along the width d...

Embodiment approach 2

[0063] The blade protection process is as follows:

[0064] (1) Leaves 3-3 pre-treatment. Before protection, degrease the entire part surface and inner cavity, especially for figure 1 The tenon 1-1, edge plate 1-2, air film hole 1-3, and tail split hole 1-4 are degreased. The treatment method is: use acetone as the cleaning agent, soak the parts in the acetone solution, Ultrasonic vibration cleaning is carried out for 60 minutes, and then it is taken out and dried with argon or compressed air;

[0065] (2) Paraffin preparation. The paraffin was melted by using a magnetic stirrer 3-4 with a heating function, the set temperature was 65° C., and the speed of the magnetic stirring was controlled by a gradual pulse speed, and the control speed range was 10-500 rpm.

[0066] (3) Pressure-sensitive adhesive tape 2-1 protects the blade body 1-5. Use the pressure-sensitive adhesive tape 2-1 as the raw material for the protection of the blade body 1-5, paste the pressure-sensitive a...

Embodiment approach 3

[0073] The blade protection process is as follows:

[0074] (1) Leaves 3-3 pre-treatment. Before protection, degrease the entire part surface and inner cavity, especially for figure 1 The tenon 1-1, edge plate 1-2, air film hole 1-3, and tail split hole 1-4 are degreased. The treatment method is: use acetone as the cleaning agent, soak the parts in the acetone solution, Vibrate and clean for 30 minutes by ultrasonic wave, then take it out and dry it with argon or compressed air;

[0075] (2) Paraffin preparation. The paraffin wax is melted by using a magnetic stirrer 3-4 with a heating function, the set temperature is 80° C., the magnetic stirring speed is controlled by a gradual pulse speed, and the control speed range is 100-1000 rpm.

[0076] (3) Pressure-sensitive adhesive tape 2-1 protects the blade body 1-5. Adopt pressure-sensitive adhesive tape 2-1 as the raw material for blade body 1-5 protection, paste pressure-sensitive adhesive tape 2-1 along the width directio...

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Abstract

The invention discloses a method for protecting a gas film hole and a tail split joint hole of a blade. According to the method, a pressure-sensitive adhesive tape is wound on the surface of the bladebody, so that liquid paraffin enters a cavity inside a turbine blade from an air inlet, because the cavity is communicated with the gas film hole and the tail split joint hole, paraffin can enter thegas film hole and the tail split joint hole, and meanwhile, the pressure-sensitive adhesive tape prevents liquid paraffin from flowing out. When the blade is taken out and cooled, liquid paraffin issolidified in the cavity, the gas film hole and the tail split joint hole, so that the alloy matrix inside the blade will not be damaged during the chemical erosion process of the blade by acid solution. The method is simple to operate and convenient and quick to detect and repair the protective effect. There is no need to take special protective operations and requirements for different types ofgas film holes, and the gas film holes with different sizes and shapes can be effectively protected. The raw paraffin wax used in the method can be recycled, pollution is avoided, the environment is friendly, and an anti-pollution technology is not needed.

Description

【Technical field】 [0001] The invention belongs to the field of turbine blades of aero-engines and gas turbines, and relates to a method for protecting air film holes and tail splitting holes of the blades. 【Background technique】 [0002] At present, with the continuous development of aero-engines and gas turbines, turbine blades are used more and more widely. The existing cooling technology of turbine blade surface mainly adopts film cooling technology and thermal barrier coating heat insulation technology. [0003] The film cooling technology uses the cooling gas in the inner cavity of the turbine blade to flow through the film holes to form a cooling film on the surface of the blade, thereby reducing the service temperature of the surface of the turbine blade, thereby significantly improving the service life and reliability of the turbine blade. The main purpose of coating a layer of thermal barrier coating (generally composed of a metal base layer and a ceramic surface l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01D5/28F01D5/18
CPCF01D5/005F01D5/286F01D5/288F01D5/186
Inventor 王玉锋张华单建红过月娥王军赵筱箐刘军孙惠娴
Owner AECC AVIATION POWER CO LTD
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