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A fan blade with a folded core plate

A fan blade, folding type technology, applied in the field of aero-engines, can solve the problems of hollow fan blades such as weight reduction and impact resistance, and achieve the effects of excellent impact resistance, weight reduction and performance improvement

Active Publication Date: 2022-07-08
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Purpose of the invention: to solve the problem that the weight reduction and impact resistance of hollow fan blades in the prior art cannot be achieved at the same time. When applied to the fan blades of aero-engines, it can not only reduce the weight, but also obtain better impact resistance. Improve the performance of aircraft engines

Method used

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  • A fan blade with a folded core plate
  • A fan blade with a folded core plate
  • A fan blade with a folded core plate

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Embodiment Construction

[0030] The present invention will be further described below with reference to the accompanying drawings, which is a hollow fan blade applied to an aero-engine. It includes an upper core board 1 , a lower core board 2 , and a foldable metamaterial 3 sandwiched between the upper core board 1 and the lower core board 2 .

[0031] The foldable metamaterial 3 in the present invention includes three structures, wherein figure 2 , image 3 Corresponding to the mirror structure, Figure 4 , Figure 5 Corresponding to the horizontal structure, Figure 8 Corresponds to the vertical structure. Compared with traditional fan blade materials, folded metamaterials have special mechanical properties such as negative Poisson's ratio and multi-stability, better impact resistance and lighter weight.

[0032] figure 1 The Miura origami cell structure described in the present invention is the basis of the three structures. combine figure 2 , 3 , the main size design parameters of Miura...

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Abstract

The invention discloses a fan blade with a folded core plate. The fan blade takes a folded metamaterial as a core layer, and together with a hollow fan blade, constitutes a new type of fan blade. Compared with the existing brazed and truss-type hollow fan blades, the folding metamaterial used in the invention has the characteristics of better performance and lighter weight, and has good application prospects in the field of aero-engine fan blade design.

Description

technical field [0001] The invention relates to the technical field of aero-engines, in particular to a fan blade. Background technique [0002] With the continuous improvement of the performance requirements of aero-engines such as thrust and rotational speed, the fan blades under high-speed rotation will break or fail due to foreign object damage, high-cycle fatigue, ice swallowing, bird strikes and other problems, resulting in high-speed high-energy The blade fragments hit the casing and cause serious accidents, which pose a great threat to the safety of aviation flight. In order to better avoid this phenomenon, the research on the structure of aero-engine hollow fan blades has become a top priority, which has broad prospects for improving the safety and airworthiness of aero-engines. [0003] Fan blades are the key components of aero-engines, and are even more representative of turbofan engines with large bypass ratios. The bypass ratio of modern aero-engines is gettin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D29/38
CPCF04D29/388Y02T50/60
Inventor 侯晓迪张志钊王志豪刘昱洋韩垒刘璐璐
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS