Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for renovating lubricant pump casing bush with plasma spraying Cu-Al coating

A lubricating oil pump and plasma technology, which is applied in the aviation field, can solve the problems that the coating strength, hardness and bending resistance cannot be satisfied at the same time, the overall shell components of the lubricating oil pump are scrapped, economic losses, etc., and achieve the repair of the lubricating oil pump shell bushing , reduce economic loss and prolong service life

Inactive Publication Date: 2009-04-08
SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
View PDF0 Cites 18 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Lubricating oil pumps are conventional equipment for aircraft. When the gap between the end face of the narrow arc boss of the lubricating oil pump casing bushing is out of tolerance and cannot be adjusted, it needs to be repaired. However, the current methods of repairing similar parts cannot meet the requirements of coating strength, hardness and Bending resistance and other indicators, so when such problems occur in the lubricating oil pump, it is usually scrapped
[0003] At present, some of these components need to be imported in our country. When the gap between the end face of the narrow arc boss of the lubricating oil pump casing bushing is out of tolerance, the overall casing assembly of the lubricating oil pump will be scrapped, causing huge economic losses.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for renovating lubricant pump casing bush with plasma spraying Cu-Al coating
  • Method for renovating lubricant pump casing bush with plasma spraying Cu-Al coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Use acetone to clean the area to be sprayed (that is, the narrow arc boss end face of the oil pump housing bush) with acetone. It is required that the sprayed surface is free of oil after cleaning; Compressed air dries the area to be sprayed.

[0030] Put the cleaned parts into the sand blowing machine, and blow the sand on the area to be sprayed. The sand blasting abrasive is white corundum sand, the particle size is 36-80 mesh, the sand blowing wind pressure is 0.20-0.40MPa, and the sand blowing distance is 100~150mm, sand blowing angle is 60°~75°. After sand blowing, blow off the floating ash on the surface of the parts with the compressed air filtered by the oil-water separator.

[0031] During the sand blowing process, no over blowing or missing blowing is allowed. After the sand blowing is completed, no oil stains, water marks and other attachments are allowed on the surface of the bushing parts of the lubricating oil pump casing. The surface of the bushing parts...

Embodiment 2

[0046] Cleaning, sand blasting and protection steps are the same as in Example 1.

[0047] The spraying material used is METC051F-NS, which contains 10wt% Al, 0.9wt% Fe, and the balance is Cu; the spraying material is dried before use at 90°C for 1.5h.

[0048] The particle size composition of the sprayed material is the same as in Example 1.

[0049] Use plasma spraying equipment to spray the spraying material to the area to be sprayed on the part. The spraying parameters are: the main gas is argon, the pressure of argon is 0.48MPa, and the flow rate is 2.4m 3 / h; the secondary gas is hydrogen, the hydrogen pressure is 0.36MPa, and the flow rate is 0.30m 3 / h; the powder feeding gas is argon, the pressure is 0.48MPa, and the flow rate is 1.2m 3 / h, the current is 480A, the voltage is 48V, the powder feeding rate is 30g / min, the spraying distance is 120-140mm, and the spraying angle is 60°-90°.

[0050] Spraying needs to start after the flame flow and powder feeding rate ar...

Embodiment 3

[0058] Cleaning, sand blasting and protection steps are the same as in Example 1.

[0059] The spraying material used is METC051F-NS, the composition is Al11wt%, Fe1.3wt%, the balance is Cu; the spraying material is dried before use, the drying temperature is 100 ℃, and the drying time is 1h.

[0060] The particle size composition of the sprayed material is the same as in Example 1.

[0061] Use plasma spraying equipment to spray the spraying material to the area to be sprayed on the part. The spraying parameters are: the main gas is argon, the pressure of argon is 0.50MPa, and the flow rate is 2.6m 3 / h; the secondary gas is hydrogen, the hydrogen pressure is 0.38MPa, and the flow rate is 0.32m 3 / h; the powder feeding gas is argon, the pressure is 0.50MPa, and the flow rate is 1.4m 3 / h, the current is 500A, the voltage is 55V, the powder feeding rate is 35g / min, the spraying distance is 100-120mm, and the spraying angle is 60°-90°.

[0062] Spraying needs to start after ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Granularityaaaaaaaaaa
Thicknessaaaaaaaaaa
Bond strengthaaaaaaaaaa
Login to View More

Abstract

A method for repairing a lubricant pump shell bushing by plasma sprayed Cu-Al coating belongs to the technical field of aviation. The repairing of a narrow-arc convex end face of the lubricant pump shell bushing by a plasma spraying method comprises the steps of washing, grit blasting, protection, spraying the spray material on the narrow-arc convex end face of the lubricant pump shell bushing by plasma spraying equipment. By adopting the method for repairing the lubricant pump shell bushing by plasma sprayed Cu-Al coating, the sprayed coating has as high as 41.07MPa of bonding strength and relatively stable hardness value. Bending test result shows that the coating bond is relatively good, and coating microscopic test shows that the metallurgical structure is relatively compact. The method has the advantages of reasonable process and correct preferences, which achieves the effect of repairing the lubricant pump shell bushing and has significance in prolonging the service life of the lubricant pump shell bushing and reducing economic loss.

Description

technical field [0001] The invention belongs to the field of aviation technology, in particular to a method for repairing a lubricating oil pump housing bush by plasma spraying a Cu-Al coating. Background technique [0002] Lubricating oil pumps are conventional equipment for aircraft. When the gap between the end face of the narrow arc boss of the lubricating oil pump casing bushing is out of tolerance and cannot be adjusted, it needs to be repaired. However, the current methods of repairing similar parts cannot meet the requirements of coating strength, hardness and Indexes such as bending resistance, so when such problems occur in the lubricating oil pump, it is usually scrapped. [0003] At present, some of these components need to be imported in our country. When the gap between the end face of the narrow arc boss of the lubricating oil pump casing bushing is out of tolerance, the overall casing assembly of the lubricating oil pump will be scrapped, causing huge economi...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C23C4/08C23C4/10C23C4/02C23C4/134
Inventor 曹家梅任大为康文牛昌安李明李宁苏可成河刘本武李健于文怀赵铁军王珺陈健薛蕴鹏
Owner SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com