Mounting Device for Gas Turbine Harnesses Using Buffer Material
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Solution Overview
Problem
Existing mounting devices for electrical harnesses in gas turbine engines detach due to high temperature shrinkage, causing the harness to move fore and aft, and require being pulled over the harness end, which is inconvenient.
Innovation Solution
A mounting device comprising two shells coupled by annular band straps with a buffer material and shielding tape, allowing secure attachment to the harness without requiring placement over the harness end, and maintaining clamping force at high temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a heat shrink bobbin is pulled over the end of a harness and heat-shrunk, then the mounting device can be attached to the harness, but the mounting device requires complex installation and cannot be used in high temperature environments
Solution Approach 1:
The patent extracts the heat shrinkage function from the mounting device itself, using a separate heat shrinkable tubing pulled over the harness end rather than requiring the mounting device to be pulled over the harness. This separates the attachment function from the heat shrinkage function, simplifying the mounting device installation while maintaining reliable attachment.
Solution Approach 2:
The patent introduces a buffer material as an intermediary between the mounting device and the harness. This buffer material (heat-resistant adhesive or high-temperature grease) mediates the thermal expansion mismatch and prevents detachment in high temperature environments, enabling reliable mounting without heat shrinkage of the mounting device itself.
2Reliability
If a mounting device is attached to a harness using heat shrinkage, then the mounting device can be secured, but high temperature causes shrinkage and detachment
Solution Approach 1:
The patent introduces a buffer material as an intermediary between the mounting device and the harness. This buffer material (heat-resistant adhesive or high-temperature grease) mediates the thermal expansion mismatch and prevents detachment in high temperature environments, enabling reliable mounting without heat shrinkage of the mounting device itself.
Solution Approach 2:
The patent changes the material parameters of the buffer material to withstand high temperatures. By selecting materials with appropriate thermal expansion coefficients and heat resistance (heat-resistant adhesive or high-temperature grease), the system maintains attachment reliability in high temperature environments where conventional materials would fail.
3Ease of manufacture
If a heat shrink bobbin is used to mount the device, then attachment is achieved, but the process requires heat shrinkage equipment and time
Solution Approach 1:
The patent extracts the heat shrinkage function from the mounting device itself, using a separate heat shrinkable tubing pulled over the harness end rather than requiring the mounting device to be pulled over the harness. This separates the attachment function from the heat shrinkage function, simplifying the mounting device installation while maintaining reliable attachment.
Solution Approach 2:
The patent applies the buffer material (heat-resistant adhesive or high-temperature grease) to the mounting device or harness surface before attachment, preparing the bonding interface in advance. This preliminary action ensures immediate thermal compatibility and prevents detachment when exposed to high temperatures, eliminating the need for subsequent heat shrinkage operations.
Data Source
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AI summary
A method and a system for a mounting device (220) are provided. The mounting device includes at least two shells (222,224), each shell having an inner surface (228) and an outer surface (234) wherein the outer surface includes a first banding zone (246), a second banding zone (254), and a clamping zone (258) extending between the first banding zone and the second banding zone and a pair of shoulders (242,244;250,252) bounding each of the first banding zone and second banding zone. The mounting device also includes an intermediary material circumscribing the wire bundle including at least one of a substantially non-porous material (225), a vulcanizing tape, and a silicone material. The mounting device further includes at least one fastener (226) configured to engage the first banding zone or second banding zone to couple the first shell and the second shell to the wire bundle and the intermediary material.