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Metal leading edge protective strips, corresponding airfoil and method of producing

A technology of airfoils and protective belts, which is applied to the supporting elements of blades, components of pumping devices for elastic fluids, pump elements, etc., can solve the problems of reducing the impact strength of components, reduce residual stress, improve Strength and elasticity properties, effect of achieving fuel consumption rate

Inactive Publication Date: 2015-04-08
GENERAL ELECTRIC CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

While thinner turbine engine airfoils would increase overall blade efficiency, thereby reducing engine Specific Fuel Consumption (SFC), any reduction in the thickness of MLEs made of titanium or its alloys could lead to a reduction in the impact strength of the component

Method used

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  • Metal leading edge protective strips, corresponding airfoil and method of producing

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Embodiment Construction

[0015] Embodiments described herein relate generally to compositions of metal leading edge (MLE) protective strips for airfoil components of gas turbine engines, and various characteristics and advantages associated with certain compositions.

[0016] figure 1 A composite fan blade 10 for a gas turbine engine is shown. The type of blade 10 is known in the art and its airfoil is shown with an MLE protective band 12 . Although figure 1 A gas turbine engine fan blade is shown, but it should be noted that the invention is not limited to the particular fan blade or gas turbine engine airfoil shown.

[0017] According to a preferred aspect of the invention, the protective strip 12 has a stainless steel or nickel based composition. The preferred composition of the protective tape 12 exhibits increased density, increased modulus of elasticity, and increased strength compared to conventional titanium-based protective tapes. The improvement of these three characteristics is intend...

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PUM

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Abstract

A metallic leading edge protective strip (12) adapted to provide impact protection for a leading edge of an airfoil of a turbomachine. The protective strip (12) is formed of a stainless steel or a nickel-based alloy and is denser and provides increased strength and elasticity characteristics as compared to an identical protective strip formed of a titanium-based alloy. The protective strip is particularly suitable for use with composite blades (10) and allows for thinner airfoils, thereby improving engine efficiency. Corresponding airfoil and method of producing such airfoil are also provided.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to US Provisional Application No. 61 / 677,179, filed July 30, 2012, the contents of which are incorporated herein by reference. technical field [0003] The present invention generally relates to leading edge protection strips suitable for composite airfoils. In particular, the present invention relates to metals and alloys used to protect the metal leading edge (MLE) of an airfoil component. Background technique [0004] Many contemporary gas turbine engine airfoil components, such as fan blades and stator vanes, are constructed of composite laminates or molded fibers. MLEs are used to protect the airfoils of such composite components from the impact and erosion damage that often occurs in the engine environment. In conventional practice, such protection is provided by wrapping the leading edge and sides of the airfoil, usually with V-shaped protective metal bands. [0005] Many proc...

Claims

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Application Information

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IPC IPC(8): F01D5/14F01D5/28F04D29/32F04D29/38
CPCF04D29/324Y02T50/672F05D2300/171F05D2220/36F04D29/023F01D5/282F01D5/288F01D5/147F05D2300/175F05D2240/303Y10T29/49337C22C19/057C22C38/02C22C38/04C22C38/42C22C38/48C22C38/54Y02T50/60F01D5/26
Inventor N. J. 克雷D. 辛T. W. 戴维斯
Owner GENERAL ELECTRIC CO