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Centrifugal compressor shaft wearing repair method

A centrifugal compressor, wear repair technology, applied in coating, metal material coating process, melt spraying, etc., can solve problems such as bending deformation, internal cracks, etc., achieve good bonding force, energy saving and environmental protection, heat input Small amount of effect

Inactive Publication Date: 2017-10-27
大连透平机械技术发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above-mentioned shortcomings existing in the prior art, the purpose of the present invention is to provide a centrifugal compressor shaft wear repair method, the present invention repairs the wear area of ​​the centrifugal compressor shaft by using a supersonic flame spray gun, so that the centrifugal compressor The temperature of the spraying process of the shaft is controlled below 200°C, which avoids bending deformation or internal crack defects of the shaft at higher temperatures

Method used

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  • Centrifugal compressor shaft wearing repair method

Examples

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Effect test

Embodiment 1

[0047] A centrifugal compressor shaft wear repair method: comprising the following steps:

[0048] Step S101, by performing a hardness test on the centrifugal compressor shaft made of 40CrNiMo7, determine whether there is a surface hardened layer on the centrifugal compressor shaft, if there is a surface hardened layer, the area covered by the surface hardened layer is a wear area, wherein, by The hardness tester is used to test the hardness of the shaft of the centrifugal compressor;

[0049] After the wear area is determined, check the coaxiality between the wear area and the shaft of the centrifugal compressor with a dial indicator to confirm whether the shaft of the centrifugal compressor is bent;

[0050] Wherein, the material of cermet coating comprises the following components in parts by weight:

[0051] Nickel: 50 parts, chromium: 30 parts, molybdenum: 30 parts, titanium carbide: 50 parts; wherein, the particle size of the material is 50 μm. The coating sprayed by t...

Embodiment 2

[0058] A centrifugal compressor shaft wear repair method: comprising the following steps:

[0059] Step S101, by performing a hardness test on the centrifugal compressor shaft made of 40CrNiMo7, determine whether there is a surface hardened layer on the centrifugal compressor shaft, if there is a surface hardened layer, the area covered by the surface hardened layer is a wear area, wherein, by The hardness tester is used to test the hardness of the shaft of the centrifugal compressor;

[0060] After the wear area is determined, check the coaxiality between the wear area and the shaft of the centrifugal compressor with a dial indicator to confirm whether the shaft of the centrifugal compressor is bent;

[0061] Wherein, the material of cermet coating comprises the following components in parts by weight:

[0062] Nickel: 30 parts, chromium: 20 parts, molybdenum: 40 parts, titanium carbide: 80 parts; wherein, the particle size of the material is 10 μm. The coating sprayed by t...

Embodiment 3

[0069] A centrifugal compressor shaft wear repair method: comprising the following steps:

[0070] Step S101, by performing a hardness test on the centrifugal compressor shaft made of 40CrNiMo7, determine whether there is a surface hardened layer on the centrifugal compressor shaft, if there is a surface hardened layer, the area covered by the surface hardened layer is a wear area, wherein, by The hardness tester is used to test the hardness of the shaft of the centrifugal compressor;

[0071] After the wear area is determined, check the coaxiality between the wear area and the shaft of the centrifugal compressor with a dial indicator to confirm whether the shaft of the centrifugal compressor is bent;

[0072] Wherein, the material of cermet coating comprises the following components in parts by weight:

[0073] Nickel: 80 parts, chromium: 10 parts, molybdenum: 20 parts, titanium carbide: 60 parts; wherein, the particle size of the material is 80 μm. The coating sprayed by t...

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Abstract

The invention relates to a centrifugal compressor shaft wearing repair method which comprises the following steps: determining a wearing region of a centrifugal compressor shaft; carrying out grinding treatment on the wearing region, carrying out dye penetration flaw detection on the ground centrifugal compressor shaft when a hardness value of the wearing region reaches or approaches that of the centrifugal compressor shaft, and stopping grinding to the wearing region after determining no defect after flaw detection; carrying out metal ceramic coating spraying treatment on the wearing region by a supersonic flame spraying gun; carrying out grinding treatment on a metal ceramic coating to enable the size of the diameter of a region shaft after the metal ceramic coating is applied to be the same as an original set size; carrying out the dye penetration flaw detection on the metal ceramic coating subjected to grinding treatment, thus obtaining a finished product after the metal ceramic coating passes through the dye penetration flaw detection. The centrifugal compressor shaft wearing repair method has the advantages of high efficiency, good binding force of the coating and the shaft, energy conservation and environmental protection, and also has the advantages of little heat input and reduction in risk of deformation and bending of the centrifugal compressor shaft.

Description

technical field [0001] The invention belongs to the field of centrifugal compressors, in particular to a method for repairing shaft wear of a centrifugal compressor. Background technique [0002] The shaft is one of the important parts of the centrifugal compressor. It not only bears and carries all the rotating parts rotating at high speed in the casing under different environments (temperature, pressure, medium), but also bears the action of bending moment. At the same time, the shaft itself bears complex Stress, so strict requirements are placed on the shaft material. For example, the main shaft of the assembled gear centrifugal compressor is made of nitrided steel, and the teeth of the small gear and the large gear are surface hardened and polished by nitriding process, and the surface hardness reaches above HRC58. [0003] In the harsh service environment, the journal and sealing area of ​​the centrifugal compressor often have wear problems, which are prone to velvet s...

Claims

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Application Information

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IPC IPC(8): C23C4/129C23C4/06C22C30/00C22C32/00C22C19/05C22C29/10
CPCC22C19/055C22C19/056C22C29/067C22C29/10C22C30/00C22C32/0052C23C4/06C23C4/129
Inventor 邓德伟张勇孙奇杨树华
Owner 大连透平机械技术发展有限公司
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