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A method for preparing a ceramic damping coating on the surface of a thin shell member of a rotating machine

A technology of rotating machinery and damping coating, applied in the field of materials, can solve problems such as reducing the vibration stress of the blade, and achieve the effect of improving the damping capacity, reducing the vibration level, and the damping applicable temperature range is wide.

Active Publication Date: 2015-11-11
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But so far, there is no report on the method of coating the surface of the blade of the rotating machine with a ceramic coating to reduce the vibration stress of the blade.

Method used

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  • A method for preparing a ceramic damping coating on the surface of a thin shell member of a rotating machine
  • A method for preparing a ceramic damping coating on the surface of a thin shell member of a rotating machine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] MgO and Al 2 o 3 MgO:Al by weight ratio 2 o 3 =1:2 mixing, ball milling to make mixed powder, screening out the part with a particle size of 60~80 mesh, drying to remove moisture, and making ceramic coating material; then put it into the powder feeding device of the atmospheric plasma spraying machine;

[0024] Use the rotating mechanical thin shell member as the substrate to remove the oil and impurities on the surface of the substrate, and then place it on the workbench of the atmospheric plasma spraying machine;

[0025] Start the atmospheric plasma spraying machine, feed argon and hydrogen into the spray gun of the atmospheric plasma spraying machine, control the flow rate of the argon gas to 40scm, and the flow rate of the hydrogen gas to 12.5scm. After the flow rate is stable, turn on the power supply of the atmospheric plasma spraying machine to generate glow Plasma, adjust the power to 35kw;

[0026] Turn on the powder feeding device to spray the ceramic coa...

Embodiment 2

[0028] MgO and Al 2 o 3 MgO:Al by weight ratio 2 o 3 = 1:3 mixing, ball milling to make mixed powder, screen out the part with a particle size of 60~80 mesh, then dry to remove water, and make ceramic coating material; then put it into the powder feeding device of the atmospheric plasma spraying machine;

[0029] Use the rotating mechanical thin shell member as the substrate to remove the oil and impurities on the surface of the substrate, and then place it on the workbench of the atmospheric plasma spraying machine;

[0030] Start the atmospheric plasma spraying machine, feed argon and hydrogen into the spray gun of the atmospheric plasma spraying machine, control the flow rate of the argon gas to 41scm, and the flow rate of the hydrogen gas to 13scm. After the flow rate is stable, turn on the power of the atmospheric plasma spraying machine to generate plasma. Body, adjust the power to 40kw;

[0031] Turn on the powder feeding device to spray the ceramic coating material...

Embodiment 3

[0033] MgO and Al 2 o 3 MgO:Al by weight ratio 2 o 3 = 1:4 mixing, ball milling to make mixed powder, screen out the part with a particle size of 60~80 mesh, then dry to remove water, and make ceramic coating material; then put it into the powder feeding device of the atmospheric plasma spraying machine;

[0034] Use the rotating mechanical thin shell member as the substrate to remove the oil and impurities on the surface of the substrate, and then place it on the workbench of the atmospheric plasma spraying machine;

[0035] Start the atmospheric plasma spraying machine, feed argon and hydrogen into the spray gun of the atmospheric plasma spraying machine, control the flow rate of the argon gas to 42scm, and the flow rate of the hydrogen gas to 13.5scm. After the flow rate is stable, turn on the power supply of the atmospheric plasma spraying machine to generate glow Plasma, adjust the power to 45kw;

[0036] Turn on the powder feeding device to spray the ceramic coating ...

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Abstract

The invention relates to a method for preparing a ceramic damping coating on the surface of a rotary machine thin-shell member, and belongs to the technical field of materials. The method comprises the following steps: (1) mixing MgO and Al2O3, carrying out ball milling to prepare mixed powder, screening a part of 60-80 meshes, removing moisture through drying to prepare a ceramic coating material, and filling into the powder delivery device of an atmosphere plasma spraying machine; (2) removing oil stain and impurities by adopting the rotary machine thin-shell member as a base body, and placing on a work table of the atmosphere plasma spraying machine; (3) starting the atmosphere plasma spraying machine, introducing argon and hydrogen into a spray gun, switching on a power supply of the atmosphere plasma spraying machine, and starting to generate plasmas; and (4) delivering the powder through the powder delivery device, starting spraying, and spraying on the base body to form the ceramic damping coating. The method disclosed by the invention is suitable for enhancing the damping capacity of the rotary machine thin-shell member, improving the dynamic characteristics of a part and reducing the possibility of the generation of vibration damage faults.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a method for preparing a ceramic damping coating on the surface of a thin shell component of a rotating machine. Background technique [0002] At present, the coating technology used for thin shell components such as blades and barrels is mostly used to achieve functions such as thermal barrier, wear resistance, and corrosion resistance. However, as the power of rotating machinery continues to increase and the working conditions become more and more severe, the problem of vibration becomes more and more prominent. In particular, the fatigue failure of various blades caused by vibration has become an important technical problem to be solved urgently. Traditional component materials can no longer meet the requirements of use, so only other reasonable passive vibration reduction methods can be used to reduce the vibration level, and coating damping as a main method of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C4/10C23C4/12C23C4/11C23C4/134
Inventor 杜广煜孙伟巴德纯韩清凯
Owner NORTHEASTERN UNIV LIAONING
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