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Coated forward stub shaft dovetail slot

一种短轴、燕尾的技术，应用在涂层、用于弹性流体的泵送装置的部件、叶片的支承元件等方向，能够解决降低耐腐蚀疲劳性能等问题

Inactive Publication Date: 2006-11-29
GENERAL ELECTRIC CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, certain types of wear resistant coatings such as Mos2 and others similar are not compatible with typical steel C450 alloys used for blades
In fact, coatings applied to C450 alloy material can reduce the corrosion fatigue resistance of the material

Method used

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  • Coated forward stub shaft dovetail slot
  • Coated forward stub shaft dovetail slot
  • Coated forward stub shaft dovetail slot

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0013] figure 1 Representing a conventional compressor front stub shaft 10 formed by six integral annular rows of dovetail slots 12, 14, 16, 18, 20 and 22, each slot 24 configured to support a compressor blade with a mating dovetail portion. Each row of blades represents a stage of the short axis of the compressor, and it is the first two rows or stages 12 and 14 of particular interest with respect to the present invention.

[0014] A typical first stage compressor vane 26 is shown in figure 2 middle. The blade includes an airfoil 28, a platform 30 and is shaped to be received in a corresponding dovetail slot 24 ( figure 1 ) inside the dovetail 32. In the past, wear resistant coatings (shown generally in phantom) have been applied to surfaces 34 (one indicated) on opposite sides of dovetail 32 . But as mentioned above, certain coatings such as Alumazite-ZD are not compatible with the C450 steel alloy material used for the blade 26 . Therefore, the corrosion resistance an...

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PUM

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Abstract

A compressor forward stub shaft comprising a plurality of axially spaced, annular rows of dovetail grooves, at least a first and a second of the plurality of rows having dovetail slots coated in part with an anti-wear coating.

Description

technical field [0001] The present invention relates generally to the art of rotating machinery, and in particular to the installation of compressor blades within rotor dovetail slots. Background technique [0002] Typically an abradable coating is applied to the dovetail portion of the compressor blade in order to reduce compressive stress and friction between the blade and the compressor wheel dovetail slot. Such coatings are applied to blade dovetails primarily due to the ease with which the coating can be applied thereto. In fact, for example, the blade itself is covered with a mask, and the coating can be sprayed directly onto the blade dovetail, and if curing is required, the blade is easily handled and moved through an oven. However, certain types of wear resistant coatings such as Mos2 and other similar coatings are not compatible with typical steel C450 alloys used for blades. In fact, coatings applied to C450 alloy material can reduce the corrosion fatigue resist...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01D5/02
CPCF04D29/322F05C2253/12F05B2230/90F01D5/3007F05D2300/611F04D29/023F05D2230/90F01D5/3092F05D2230/30F05D2300/43F05D2260/95F05D2300/603F04D29/00F04D29/38
Inventor F·J·卡萨诺瓦S·-D·高R·M·鲁滨逊R·G·罗
Owner GENERAL ELECTRIC CO
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