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Blade containment structure

A blade and structure technology, applied in the field of fan blade containment structure, can solve the problems of damage to the structural integrity of the soft wall containment structure, large hole circumferential cracking, etc.

Inactive Publication Date: 2020-01-14
GENERAL ELECTRIC CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This can lead to large holes and / or circumferential cracking between the front and rear cylindrical flanges and the tapered / sloped sections
Because the PMC material is brittle, cracks can easily propagate 360°, compromising the structural integrity of the soft-wall containment structure

Method used

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  • Blade containment structure
  • Blade containment structure
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Examples

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Embodiment Construction

[0020] Referring to the drawings, wherein like reference numerals designate like elements throughout the several views, figure 1 An exemplary turbofan engine is depicted generally at 10 having a fan casing 12 surrounding a fan 14 and generally supported by outlet guide vanes 16 and struts 17 . The compressor section 18 is located on the rear side of the fan 14 . Other conventional elements, such as a combustion section, a turbine section, and an exhaust section (not shown), are included in conventional engines. Since these are conventional elements well known to those skilled in the art, further illustration and description thereof are omitted.

[0021] Shafts 20 , 21 driven by turbines (not shown) drive compressor section 18 and fan 14 at high speeds. Fan 14 moves bulk air through outlet guide vanes 16 where it is divided by diffuser 22 into bypass flow path 24 and engine flow path 26 . The relatively large amount of air flowing in bypass flow path 24 is delivered directl...

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PUM

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Abstract

The present invention discloses a blade containment structure surrounding a fan in a turbofan engine. The blade containment structure includes a cellular material to absorb energy and contain fragments of a blade thrown outward; an inner shell; a ductile back sheet spaced radially outward from the inner shell, the ductile back sheet and inner shell cooperating to define a nesting area for the cellular material, wherein the cellular material is bound at its radially inner surface by the inner shell and at its outer surface by the ductile back sheet; and a containment blanket overlaid on the ductile back sheet, the containment blanket being of the type effective to contain fragments of the blade that penetrate through the ductile back sheet.

Description

technical field [0001] The present invention generally relates to a containment structure surrounding a turbomachinery rotor. More particularly, the invention relates to a fan blade containment structure comprising means for maintaining structural strength in the sealing area of ​​a fan of a turbofan aircraft engine after damage. Background technique [0002] The fan includes a rotor with large, heavy rotating blades and is positioned at the front end of the turbofan engine to force ambient air into the flow passages to provide thrust. Because the fan is located at the forward end of the turbofan engine, the rotating elements are most susceptible to damage or catastrophic failure, for example, from ingestion of foreign object debris ("FOD"), such as bird strikes. A bird strike can damage the fan and, in extreme cases, can dislodge more than one segment or the entire blade of the fan. [0003] For practical and regulatory reasons, containment structures must be provided to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/52F04D29/02
CPCF04D29/023F04D29/522F01D21/045F01D25/24F05D2220/36F05D2240/14F05D2250/283F05D2300/518F05D2300/601Y02T50/60F01D25/005F05D2210/12F05D2220/323F05D2230/40F05D2230/50F05D2260/00F05D2300/121F05D2300/133F05D2300/30
Inventor 纳加莫汉·戈文哈利·普拉巴卡尔马诺·库马尔·杰因尼泰什·杰因乌玛·马赫斯瓦·多马拉尼古拉斯·约瑟夫·克雷
Owner GENERAL ELECTRIC CO
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