Unlock instant, AI-driven research and patent intelligence for your innovation.

Impactor containment

a technology of impactors and containments, applied in the direction of machines/engines, efficient propulsion technologies, combustion air/fuel air treatment, etc., can solve the problems of honeycomb needing to be cut, internal ribs pose a major manufacturing difficulty, and the weight of the casing is heavy, so as to reduce the strength, less able and increase the ability to withstand an impact event

Inactive Publication Date: 2011-04-07
ROLLS ROYCE PLC
View PDF28 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides an impactor containment system that includes a laminate material with zones of weakness. These zones of weakness can be constituted by perforations, cuts, interruptions, dimpling, or tiling in the face sheet or other layers of the laminate structure. These zones of weakness allow for deliberate failure of a component, which in this case is the face sheet, in order to prevent the impactor from penetrating through the entire structure and potentially causing damage. The system also includes a mechanism that allows the impact to be driven into the outer casing, which acts as a wedge to slow down the impactor. This mechanism is achieved by providing zones of weakness in the face sheet or other layers of the laminate structure.

Problems solved by technology

However, such a casing has the disadvantage of being heavy and requiring a relatively large thickness to be effective.
This may mitigate for example the weight problem of solid ductile material but internal ribs pose a major manufacturing difficulty.
Also the honeycomb needs to be cut into strips to be laid between the ribs, which has also proved to be difficult.
Thus, this proposal involves significant cost, material utilisation and manufacturing time, with perhaps only a modest weight reduction.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Impactor containment
  • Impactor containment
  • Impactor containment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016]Referring to FIG. 1, a gas turbine engine is generally indicated at 10 and includes, in axial flow series in its gas path, an air intake 11, a propulsive fan 12, an intermediate pressure compressor 13, a high pressure compressor 14, a combustor 15, a turbine arrangement comprising a high pressure turbine 16, and intermediate pressure turbine 17 and a low pressure turbine 18, and an exhaust nozzle 19.

[0017]The gas turbine engine 10 for an aircraft operates in a conventional manner so that air entering the intake 11 is accelerated by the fan 12 which produces two air flows: a first air flow into the intermediate pressure compressor 13 and a second air flow which provides propulsive thrust. The intermediate pressure compressor 13 compresses the air flow directed into it before delivering that air to the high pressure compressor 14 where further compression takes place.

[0018]The compressed air exhausted from the high pressure compressor 14 is directed into the combustor 15 where i...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

An impactor containment system including a laminate material, the laminate material having a face sheet, a cellular filling providing a crushable layer one side of which layer is arranged on the face sheet, and a stiff backing layer arranged on other side of the crushable layer, wherein the face sheet is provided with zones of weakness.

Description

CROSS REFERENCE TO RELATED APPLICATION[0001]This application is entitled to the benefit of British Patent Application No. GB 0917149.7, filed on Oct. 1, 2009.FIELD OF THE INVENTION[0002]This invention relates to impactor containment; particularly, but not exclusively, the invention relates to impactor containment systems for gas turbine engines.BACKGROUND OF THE INVENTION[0003]For example, the casings of gas turbine engines are designed to absorb energy from impactors, such as blades or other components which may fail under extreme loads and be released from the spinning blade assemblies within the engine. Such casings thus incorporate containment systems designed to catch or deflect released components. Further, under normal use the containment systems also have to resist impacts from ice and smaller particles sucked through the engine intake.[0004]One example of a containment system simply involves a casing formed from solid ductile material. However, such a casing has the disadva...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(United States)
IPC IPC(8): F01D25/00
CPCF01D21/045F01D25/24F02C7/042F01D11/18F02C7/04Y02T50/671F02K3/06Y02T50/60
Inventor MCMILLAN, ALISON JANE
Owner ROLLS ROYCE PLC