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Titanium blades of compressor repaired by cold pressing

A technology of compressor blades and blades, which is applied in the directions of blade support elements, mechanical equipment, engine elements, etc., can solve problems such as the reduction of blade strength characteristics

Active Publication Date: 2015-11-25
SN DETUDE & DE CONSTR DE MOTEURS DAVIATION S N E C M A
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that the entire length of the blade is pressed instead of just one end of it
The strength characteristics of the blade are thus reduced due to the reduced thickness of its profile
In addition, this method is only suitable for one blade profile shape, and when used on different stages of blades, the rollers need to be replaced

Method used

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  • Titanium blades of compressor repaired by cold pressing
  • Titanium blades of compressor repaired by cold pressing
  • Titanium blades of compressor repaired by cold pressing

Examples

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Embodiment Construction

[0021] refer to figure 1 , figure 1 A cross-section of a rotor 1 of a turbomachine compressor is shown, including blades 2 mounted on the rotor 1 and a compressor disk 3 inside the rotor 1 facing the blades 2 . Each blade 2 has a root secured to the rotor 1 using techniques known to those skilled in the art, and the blades extend as far as the tip, or tip 4, to which the repair method that forms the subject of the present invention is directed.

[0022] refer to figure 2 , which is a radial cross-section of the blade tip, the shape of the blade tip is a sharp edge 4, the thickness of which is determined by the expected mechanical strength characteristics, and its radial extension has a thinner part 5, which is called a groove by those skilled in the art The tip, the grooved tip acts to form a seal against the casing surrounding the compressor. This thinning of the groove tip is such that it inadvertently penetrates into the abradable material to which the casing is incorpo...

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Abstract

A method for repairing a compressor blade of a turbine engine, the blade including a cat's tongue at the radial end thereof, the radial extension of which is less than a predefined nominal radial extension. The method includes elongating the cat's tongue via a cold-compacting operation applied to the walls of said tongue, such that the radial elongation thereof becomes greater than the nominal extension. The compacting operation is a rollerburnishing operation carried out by moving the end of the blade between two rollers having rectilinear generatrices and spaced apart by a distance smaller than the thickness of the cat's tongue, along the chord connecting the leading edge with the trailing edge thereof.

Description

technical field [0001] The field of the invention is the field of aero-engines and, in particular, the field of repair of compressor blades of these engines. Background technique [0002] Aeroengines are traditionally constructed from assemblies consisting of one or more compressors that compress air drawn into an intake, a combustor that burns fuel mixed with air, one or more output combustors Part of the power is generated to drive the turbine(s) of one or more compressors, and an exhaust nozzle through which the resulting gases are ejected. Compressors are constructed as a series of stages, each stage consisting of a runner, or rotor, and a stator ring, or stator, all of which are fitted with blades, called rotor or stator blades, respectively. The rotor blades are held by their inner part, or root, through the axis of rotation of the engine, while their outer part, or tip, is held opposite the compressor housing, which encloses the entire air flow path and energizes the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21D3/16B23P6/00F01D5/00
CPCB21D3/16B23P6/002B23P9/02F01D5/005F01D5/20F05D2230/20Y02T50/67Y02T50/673Y10T29/46Y10T29/47Y10T29/474Y10T29/49318Y02T50/60
Inventor 文森佐·伯托里瑟奇·德 桑克蒂斯斯特凡·雷内·朱利安·朱斯蒂克劳德·马赛尔·芒斯
Owner SN DETUDE & DE CONSTR DE MOTEURS DAVIATION S N E C M A
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