Hollow fan blade and manufacturing method thereof

A technology for fan blades and manufacturing methods, applied in the directions of blade support elements, engine elements, machines/engines, etc., can solve the problems of disadvantageous hollow blade advantages, complex process, and high blade weight, and achieve light weight, simple process, and complete guarantee. sexual effect

Active Publication Date: 2013-05-08
AECC COMML AIRCRAFT ENGINE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the process of filling the damping material is relatively complicated, and the weight of the formed blade is relatively high, which is not conducive to reflecting the advantages of the hollow blade

Method used

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  • Hollow fan blade and manufacturing method thereof
  • Hollow fan blade and manufacturing method thereof
  • Hollow fan blade and manufacturing method thereof

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Embodiment Construction

[0036] A preferred embodiment of the hollow fan blade according to the present invention will be described in detail below with reference to the accompanying drawings.

[0037] see figure 1 , which shows a preferred embodiment of the titanium alloy hollow fan blade 10 according to the present invention. The hollow fan blade 10 includes an upper wall 20 , a lower wall 30 and an inner cavity 40 . An internal chamber 40 is defined by an upper wall 20 and a lower wall 30 joined by atomic diffusion. The upper wall plate 20 and / or the lower wall plate 30 may be made of titanium alloy material. At least one of the upper wall plate 20 and the lower wall plate 30 is provided with a plurality of grooves (such as Figure 6 shown), in the shown embodiment, the inner walls of the upper wall plate 20 and the lower wall plate 30 are respectively provided with grooves 21, 31. One or more titanium alloy springs 50 are arranged in the inner chamber 40, and the springs 50 are preferably made...

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Abstract

The invention provides a hollow fan blade which comprises an upper wallboard, a lower wallboard and an inner cavity. The inner cavity is defined by the upper wallboard and the lower wallboard through atomic diffusion connection, internally comprises a plurality of titanium alloy springs and is internally filled with damping materials, two ends of each spring are connected to the upper wallboard and the lower wallboard respectively through atomic diffusion, at least one of the upper wallboard and the lower wallboard is provided with a plurality of grooves, and ends of the springs are positioned in the grooves respectively. The invention further provides a manufacturing method of the hollow fan blade. The hollow fan blade has damping and impact energy absorption effects, and is lighter, and simpler in process.

Description

technical field [0001] The invention relates to a hollow fan blade, which is mainly used in civil turbofan engines with large bypass ratio, and belongs to the technical field of aeroengines and high-speed rotating machinery. Background technique [0002] The fan blades of modern civilian large-bypass turbofan engines are mostly designed with wide chords and no intermediate bosses. Compared with narrow-chord blades with bosses, wide-chord blades not only have better performance and higher efficiency, but also have better resistance to foreign object impact. Ability has improved. [0003] When fan blades with wide chords and no intermediate bosses are widely used in civil aeroengines with large bypass ratios, a problem that must be solved is the vibration of the blades caused by flutter and aerodynamic torsion. In the patent EP2014384A1 "Components with internal damping material and its manufacturing method" applied by the British Rolls Royce company, the methods of diffusion...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01D5/12F01D5/14
Inventor 陈继悦柴象海
Owner AECC COMML AIRCRAFT ENGINE CO LTD
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