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Method of protection of contact surfaces between two metallic pieces

A technology of metal parts and contact surfaces, which is applied in the field of compressor or turbojet fan, the contact surface between two metal parts, and the rotating disk seat, which can solve the problems of disk seat rupture and disk seat cracking, etc.

Inactive Publication Date: 2006-04-26
SNECMA MOTEURS (FR)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is a risk of cracking the disc seat, and there may be consequences for the disc seat itself to shatter

Method used

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  • Method of protection of contact surfaces between two metallic pieces
  • Method of protection of contact surfaces between two metallic pieces
  • Method of protection of contact surfaces between two metallic pieces

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Embodiment Construction

[0016] To realize the present invention, preferably use a kind of known powder, wherein each particle 11 has as figure 1 The structures shown in , that is, they are graphite particles 12 coated in nickel 13 . Satisfactory results have been obtained from such powders with particle sizes in the range of 20 [mu]m to 100 [mu]m. The proportion by weight of graphite is in the range of 10% to 40%.

[0017] However, the size of the particles can be on the smaller nanometer scale, which can be provided by thermal spraying methods as described below.

[0018] In the more specific embodiments described, the powder is thermally sprayed, preferably by plasma spraying. This spray ( image 3 ) is accomplished using a conventional plasma torch 16 on the contact area 18 of the blade root 20. It should be known that the blade root is the part where the fan blade is embedded in the groove on the rotating disk base of the fan. Such as figure 2 As shown, the powder is sprayed when the heat ...

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Abstract

A method of protecting the contacting surfaces of two metallic parts that require relative movement. Said method comprises coating at least one of said surfaces in a composite self-lubricating material (22) consisting only of graphite particles (12) distributed in a nickel matrix (13).

Description

technical field [0001] The invention relates to a method of protecting a contact surface between two metal parts subjected to relative movements of small magnitudes. The invention relates in particular to the field of turbojet engines, and in particular to the mounting of blades to a rotating disk base of a fan, wherein the roots of the blades are held in grooves formed on the periphery of the disk base. The invention also relates to a compressor or turbojet fan provided with such protection. Background technique [0002] In aircraft engines, it is known to prevent wear caused by small movements between the rotating disk seat and the fan blade root by using a copper-nickel-indium coating on the bearing surface of the blade root, which is in contact with the disk seat groove in which the blade root is embedded. contact with the inner surface. This technology is no longer suitable for engines with heavy blade loads in recent years. The coatings that are still in use today w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/04C10M103/02C10M103/04C23C4/067C23C4/08F01D5/28F01D5/30
CPCC10M103/00C10M103/02C10M2201/041C10M2201/066F01D5/3092C10N2010/14C10N2020/061C10N2040/14C10N2050/14Y02T50/60C10N2010/16
Inventor 列昂尼德·列斯涅夫斯基亚历山大·特罗申若埃尔·维尼奥
Owner SNECMA MOTEURS (FR)