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Seepage prevention method and fixture for aerial engine blade rabbet

A technology of aero-engine and blade mortise, which is applied in the direction of metal material coating process, coating, solid-state diffusion coating, etc., can solve the problems of low production efficiency and poor anti-seepage effect, so as to improve production efficiency, save cost, prevent good penetration effect

Active Publication Date: 2013-03-20
AECC AVIATION POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the shortcomings of poor anti-seepage effect and low production efficiency of the original process, the present invention proposes an improved method for anti-seepage of aero-engine blade tenons

Method used

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  • Seepage prevention method and fixture for aerial engine blade rabbet
  • Seepage prevention method and fixture for aerial engine blade rabbet
  • Seepage prevention method and fixture for aerial engine blade rabbet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0051] This embodiment is an anti-seepage method for an aero-engine blade tenon, and the specific process is:

[0052] Step 1, cleaning the dirt in the blade. Align the sand outlet of the sandblasting machine with the four air inlets 6 on the top end surface of the tenon of the blade 1, and perform wet sand blowing on the inner cavity of the blade 1 to remove oil or other dirt in the inner cavity of the blade 1. The sand used in the sand blowing is 150 mesh aluminum oxide sand, the wind pressure of the sand blowing is 0.1-0.2 MPa, and the time for each blade to wet the sand blowing is 5-8 s. In this embodiment, the time for each blade to wet sand blowing is 7s, and the wind pressure of sand blowing is 0.15MPa

[0053] Step 2, cleaning the remaining sand particles in the inner cavity of the blade. Align the compressed air outlet with the four air inlets 6 on the blade 1 and blow for 15 seconds to blow out the remaining sand particles in the inner cavity of the blade.

[0054...

Embodiment 3

[0064] This embodiment is an anti-seepage method for an aero-engine blade tenon, and the specific process is:

[0065] Step 1, cleaning the dirt in the blade. Align the sand outlet of the sandblasting machine with the four air inlets 6 on the top end surface of the tenon of the blade 1, and perform wet sand blowing on the inner cavity of the blade 1 to remove oil or other dirt in the inner cavity of the blade 1. The sand used in the sand blowing is 150 mesh aluminum oxide sand, the wind pressure of the sand blowing is 0.1-0.2 MPa, and the time for each blade to wet the sand blowing is 5-8 s. In this embodiment, the time for each blade to wet sand blowing is 8s, and the wind pressure of sand blowing is 0.2MPa

[0066] Step 2, cleaning the remaining sand particles in the inner cavity of the blade. Align the compressed air outlet with the four air inlets 6 on the blade 1 and blow for 15 seconds to blow out the remaining sand particles in the inner cavity of the blade.

[0067]...

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Abstract

The invention relates to a seepage prevention method and a fixture for an aerial engine blade rabbet. The seepage prevention method for the aerial engine blade rabbet comprises the following steps of: after heating the cleaned blade rabbet, winding aluminum oxide cotton on the outer surface of the blade rabbet, and clamping the aluminum oxide cotton wound on the blade rabbet by two metal clamps; then putting the blade rabbet wrapped by the aluminum oxide cotton into a metal protective jacket together with the metal clamps; and taking mixtures of ferro-aluminum powders, aluminum-silicon powders and tetra-methylammonium chloride as seepage agents, and carrying out gas aluminizing in a conventional method. The aluminum oxide, used in the invention, can resist corrosive atmosphere, and can not generate any chemical reaction and further generate pollution to a blade. Due to the adoption of the seepage prevention method and the fixture for the aerial engine blade rabbet, seepage layers on the rabbet part can be completely removed by only carrying out processes of wet grit blasting and coloring for one time, the repeated processes of dry grit blasting and the coloring are avoided, the production efficiency is improved for 1-2 times, and 30-40% of cost is saved; and furthermore, the operation is simple, and the seepage prevention effect is good.

Description

technical field [0001] The method of the invention is to limit the contact between the tenon of the blade and the gas during gas aluminization in the inner cavity of the blade of the aeroengine, and control the thickness of the aluminized layer of the tenon of the blade within the range of 0-5 μm. Background technique [0002] The original method of protecting the tenon of the blade is to use heat-insulating aluminum silicate wool as the inner layer, and then use nickel foil as the outer layer to wrap the entire tenon of the blade, then tie it tightly with high-temperature alloy wire, and apply glass lubricant to the gap. After gas aluminizing, a discontinuous infiltrating layer of 20-25 μm tends to appear on the surface of the tenon, and the adiabatic aluminum silicate cotton and lubricant appear pulverization and volatilization, which leads to the deposition of a large amount of Al element in the inner cavity and outer surface of the blade and Si element. The anti-seepage...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C10/04C23C10/08
Inventor 王福平刘红斌霍世军梁养民谢国印任萍戴静茹
Owner AECC AVIATION POWER CO LTD
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