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Fan blade in metal/composite material mixed structure and manufacturing method thereof

A technology of fan blades and composite materials, applied in the direction of supporting components of blades, mechanical equipment, machines/engines, etc., can solve problems such as processing difficulties, achieve the effects of improving mechanical properties, reasonable design, and important engineering application value

Inactive Publication Date: 2012-12-05
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] But above-mentioned prior art is the blade of hollow structure, processing difficulty, especially the welding of rib

Method used

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  • Fan blade in metal/composite material mixed structure and manufacturing method thereof
  • Fan blade in metal/composite material mixed structure and manufacturing method thereof
  • Fan blade in metal/composite material mixed structure and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Such as figure 1 As shown, the fan blade 1 described in this embodiment is a metal structure, and the fan blade is installed through the dovetail 4. The pressure surface of the blade 1 is provided with a hollow structure with a built-in composite material 2, and the bottom of the hollow structure is equidistant from the suction surface. The thickness D is 1 / 5 to 1 / 10 of the maximum thickness of the blade, preferably 1 / 7; the bottom of the hollow structure is equidistant from the suction surface of the fan blade, and the contour shape of the hollow structure and the fan blade is equal ratio.

[0021] Compared with the structure of several existing discrete grooves, the structure of the device is an integral groove structure.

[0022] The lower edge plate 3 is of equal thickness plate structure and the lower edge plate 3 is welded with the fan blades, and the lower edge plate 3 forms a flow channel structure together with the fan blades and the wheel disk on which the fa...

Embodiment 2

[0032] This embodiment relates to the preparation method of the above-mentioned fan blades. Several layers of unidirectional carbon fibers are interlaced and stacked to form a built-in composite material 2 after hot pressing. The built-in composite material 2 filling in the staggered structure makes the metal and composite material integrally bonded together to form the fan blade.

[0033] The unidirectional carbon fiber composite material 7 means that there are a large number of carbon fiber filaments in one direction, and only a small amount of generally thin carbon fiber filaments play a connecting role in the other direction.

[0034] In order to enhance the strength of the blade in which direction, it is enough to arrange several layers of unidirectional carbon fiber composite material 7 in this direction. Finally, by hot pressing, the unidirectional carbon fiber composite material 7 and the metal fan blade are formed in an interlaced structure.

Embodiment 3

[0036] This embodiment relates to the wide-chord fan of the above-mentioned fan blades and the civil large bypass ratio turbofan engine using the wide-chord fan, the thrust-to-weight ratio is 10-20, the number of the fan blades is 15-25, and the fan includes The wheel disc and the fan blades are connected by tenons.

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PUM

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Abstract

The invention relates to a fan blade in a metal / composite material mixed structure which is used for a civil aviation engine fan with large bypass ratio and belongs to the technical field of aviation engine fans, and a manufacturing method thereof; an empty slot structure with a built-in composite material is arranged on a pressure surface of the fan blade; the distance from the bottom of the empty slot structure to the force suction surfaces of the fan blade is equal; the thickness of the empty slot structure is one fifth to one tenth of the maximum thickness of the fan blade; and the empty slot structure and the outline shape of the fan blade are in equal proportion relationship. The fan blade has the characteristics of small density, higher strength-to-density ratio, further optimization of mechanical performance and longer service life.

Description

technical field [0001] The invention relates to a device and preparation in the technical field of aero-engine fans, in particular to a fan blade with a metal / composite material hybrid structure for civil high-bypass-ratio aero-engine fans and a preparation method thereof. Background technique [0002] Most of the fans of modern civil high bypass ratio turbofan engines use wide-chord blade design technology, which has good performance and high efficiency, and is easier to process than the fan blades designed in the past, and has been widely used in fan design. With the increase of aero-engine thrust, higher requirements are placed on the strength, deformation and weight of fan blades. For fan blades of turbofan engines with large bypass ratio, solid metal wide-chord blades can no longer meet the strength, weight and weight requirements. other design requirements. [0003] The fan blades of the advanced high bypass ratio turbofan engines in service all adopt weight reduction...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01D5/28F01D5/14
Inventor 吴亚东王安正欧阳华杜朝辉
Owner SHANGHAI JIAO TONG UNIV
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