Engine containment ring with honeycomb negative Poisson's ratio structure and manufacturing method

Abstract

The invention discloses an engine containing ring with a honeycomb-shaped negative poisson ratio structure. The engine containing ring comprises an inner ring, an outer ring and an interlayer clampedbetween the inner ring and the outer ring. The interlayer is provided with a plurality of honeycomb-shaped cell units, the cell units extend in the circumferential direction, and the radial sections are of the negative poisson ratio structure. The radial section of each cell unit is provided with two first cell walls and four inward-concave second cell walls, wherein the two first cell walls extend in the two circumference faces concentric to the inner ring and the outer ring, and the first cell walls and the second cell walls are connected and form an inward-concave hexagon structure in a surrounding manner. Every two mutually-staggered and adjacent cell units are mutually attached through the respective second cell walls correspondingly. The containing ring has good anti-impact performance and energy absorbing capability, and reliability of an engine is guaranteed; and a good weight reduction effect is achieved, and the potential of structure design lightweight of aviation componentscan be sufficiently excavated. Meanwhile, the invention further discloses a manufacturing method easy to achieve and control.

Description

technical field [0001] The invention belongs to the field of aero-engines, and specifically designs an engine containment ring with a honeycomb negative Poisson's ratio structure and a manufacturing method. Background technique [0002] With the continuous improvement of the performance requirements of aero-engines such as thrust and speed, engine blades rotating at high speeds will fail and fracture due to foreign object damage, high-cycle fatigue, bird strikes, high temperature, material defects, etc., and then the broken blades will fly. If it hits the receiver, it is prone to non-containment accidents. High-speed, high-energy non-contained debris may damage the aircraft's cabin, fuel tank, hydraulic pipeline and electrical control circuit, posing a serious threat to aviation flight safety. Therefore, inclusive research on aero-engines is of great significance for improving engine safety, reliability, and airworthiness. [0003] The casing around the fan blades is gener...

AI Technical Summary

Problems solved by technology

This method is significantly lighter than the earlier metal containment ring, but this soft-wall containment casing structure must have enough external space to allow the high-strength Kevlar fabric to fully deform when debris impacts

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