Fan containing casing and preparation method thereof
A fan and casing technology, which is applied in the design field of aero-engine composite fan casings, can solve problems such as being susceptible to corrosion, not resistant to corrosion, and bulky
Active Publication Date: 2022-02-08
AECC COMML AIRCRAFT ENGINE CO LTD
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Problems solved by technology
[0005] 2. The second type of casing structure mostly adopts the containment casing with aramid fiber winding structure. The design concept of this casing is to reduce the weight of the casing as much as possible on the basis of meeting the inclusiveness, so lightweight materials such as Kevlar are used. The structural metal material of the casing is used as the main frame of the casing, but the aluminum alloy or titanium alloy is milled into a thin-walled structure. In order to improve its tolerance, aluminum honeycomb and aramid cloth are wrapped around the aluminum alloy or titanium alloy casing , in order to meet its inclusiveness, the aramid cloth is usually wrapped with dozens or even dozens of layers. Compared with the pure metal casing, this kind of casing is lighter in weight, but it is relatively bulky. Not resistant to corrosion, although resin is used to protect the aramid cloth, but the surface of the resin is not waterproofed, making it susceptible to corrosion and poor maintainability
On the other hand, in order to achieve structural optimization, this type of casing can be designed to have the characteristics of non-uniform thickness distribution, and the thickness of the containment area is greater than that of the non-containment area. characteristics are more difficult to achieve
More importantly, this type of casing can only be used to accommodate composite fan blades
Method used
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[0048] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. Note that the aspects described below in conjunction with the drawings and specific embodiments are only exemplary, and should not be construed as limiting the protection scope of the present invention.
[0049] Aiming at the requirement that the fan containment case must ensure sufficient rigidity and containment while minimizing its own weight, the present invention proposes a mixed structure / material aeroengine fan containment case 100 . figure 1 A schematic diagram of a fan containment case 100 for a hybrid structure / material aero-engine is shown in accordance with an aspect of the present invention.
[0050] Such as figure 1 As shown, the fan containing casing 100 surrounds the fan of the aero-engine, and is in the shape of a cylinder as a whole. figure 1 A part of the fan containing casing 100 is cut off to illustrate figure 2 sectional...
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Abstract
The present invention provides a fan containing casing, which surrounds the fan of an aero-engine. The fan containing casing includes a main frame, and the main frame includes a cylindrical side wall and flanges located at both ends of the side wall. The main frame Made of carbon fiber resin matrix composite material, the side wall of the main frame includes a containment area along the axial direction of the casing and non-containment areas on both sides of the containment area. The containment layer distributed in the circumferential direction of the box is made of a resin-based composite material mixed with carbon fiber and aramid fiber.
Description
technical field [0001] The invention relates to the design field of an aero-engine composite material fan casing, in particular to a fan containing casing with a hybrid structure and composite materials and a preparation method thereof. Background technique [0002] The fan containment casing is an important part of an aero-engine, its function is to contain the fallen fan blades or debris when the fan blades accidentally fall off or be damaged, and prevent further damage to the engine and aircraft structure. [0003] The design of the fan containment case requires sufficient rigidity and excellent containment capacity, which puts forward very high requirements for the design of the fan containment case. Aeroengines usually use the following methods to achieve the containment design of the fan case: [0004] 1. Traditional aero-engines are mostly made of all-metal materials (high-strength steel, titanium alloy, aluminum alloy). In order to ensure that the overall rigidity o...
Claims
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IPC IPC(8): F04D29/40F04D29/02B29C70/30B29C70/08B29K305/08
CPCF04D29/023F04D29/403B29C70/086B29C70/30B29K2305/08
Inventor 陈云永陈巍秦文陈璐璐廖连芳
Owner AECC COMML AIRCRAFT ENGINE CO LTD