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Repair method for noise suppression structure

Inactive Publication Date: 2006-03-23
HONEYWELL INT INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, the turbine engines, as well as other components that make up the engine, can be sources of unwanted noise, especially during aircraft take-off and landing operations.
Moreover, APUs and ECSs can be sources of unwanted ramp noise.
Periodically, these noise suppression panels may become damaged from normal wear.
However, neither cured resins nor clay have acoustic damping properties, and thus, can reduce, rather than maintain or enhance, the noise suppression capabilities of the panel.
The foam core material in the noise suppression panels may contain manufacturing defects, such as voids or uneven surfaces.
In these cases, the defective panels may not operate as intended and have historically been entirely discarded.
As a result, the costs of aircraft manufacture and / or maintenance may increase.

Method used

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  • Repair method for noise suppression structure
  • Repair method for noise suppression structure
  • Repair method for noise suppression structure

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Embodiment Construction

[0023] Before proceeding with the detailed description, it is to be appreciated that the described embodiment is not limited to use in conjunction with a particular type of engine, or in a particular type of vehicle. Thus, although the present embodiment is, for convenience of explanation, described as being implemented in an aircraft environment, it will be appreciated that it can be implemented in various other types of vehicles, and in various other systems and environments.

[0024] Turning now to the description, and with reference first to FIG. 1, an exemplary noise suppression panel 100 is depicted in perspective and cross section, respectively. In FIG. 1, the panel 100 includes a back plate 102, a face plate 104, and a bulk absorber 106. The back plate 102 is preferably imperforate and is constructed of any one of numerous types of non-porous materials such as, for example, aluminum, epoxy, or bismaleimide (BMI). As will be described more fully below, the back plate 102 is pre...

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Abstract

A method is provided for repairing a defect in a noise suppression panel. The method may be used to repair defects in a panel that may occur during the manufacture of or normal use of the panel. The method includes the steps of removing the defect from the noise suppression panel to create a cavity therein, forming material comprised of a material having acoustic damping properties into an insert configured to mate with the cavity, and placing the insert into the cavity.

Description

FIELD OF THE INVENTION [0001] The present invention relates to noise suppression structures and, more particularly, to noise suppression structures for aircraft ducts and plenums, and methods of repairing the structures. BACKGROUND OF THE INVENTION [0002] Many aircraft are powered by jet engines. In most instances, jet engines include one or more gas-powered turbine engines, auxiliary power units (APUs), and / or environmental control systems (ECSs), which can generate both thrust to propel the aircraft and electrical energy to power systems installed in the aircraft. Although most aircraft engines are generally safe, reliable, and efficient, the engines do exhibit certain drawbacks. For example, the turbine engines, as well as other components that make up the engine, can be sources of unwanted noise, especially during aircraft take-off and landing operations. Moreover, APUs and ECSs can be sources of unwanted ramp noise. Thus, various governmental rules and regulations aimed at miti...

Claims

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Application Information

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IPC IPC(8): E02D37/00
CPCB29C73/06B29C73/26F01D5/005F05D2230/80Y02T50/672F05D2220/50F05D2260/96F02C7/045E04G23/0207Y02T50/60
Inventor STEVENSON, JAMES F.WILLIAMSON, ROGER B.VINTILESCU, ION VIRGILCHUNG, VINCENT
Owner HONEYWELL INT INC
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