Hybrid Metal Mount Structure for Heat-Stable Vibration Damping
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Solution Overview
Problem
Existing mount systems, particularly in turbomachines, face challenges in effectively damping vibrations while maintaining structural integrity and durability, especially under high heat conditions where elastomers degrade, leading to complex and costly solutions.
Innovation Solution
A hybrid hard-soft vibration damping mount system utilizing a continuous metal-to-metal connection with damping holes and slits configured to deflect and reduce vibration transmission, providing a tunable damping effect through a series of concentric slits and ligaments, which maintains support even if elastomers degrade.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If elastomers are used to reduce vibration transfer, then vibration damping is improved, but reliability deteriorates due to degradation and disintegration over time or under high heat conditions
Solution Approach 1:
The patent changes the material parameter from elastomer to metal and modifies the structural parameter by introducing damping holes with concentric slits. This structural configuration allows the metal mount to provide vibration damping through controlled flexibility while maintaining thermal stability and reliability under high heat conditions where elastomers would degrade.
Solution Approach 2:
The patent creates a composite structure within the metal mount by integrating damping holes with concentric slits, effectively combining the rigidity of metal with the vibration-damping characteristics traditionally associated with elastomers. This composite approach eliminates the need for separate elastomer components while achieving both vibration reduction and thermal reliability.
2Strength
If a rigid connection is used to maintain structural integrity, then strength is improved, but vibration damping deteriorates
Solution Approach 1:
The patent segments the continuous metal structure by introducing damping holes with concentric slits. These segmented features create controlled flexibility zones that allow vibration damping while maintaining overall structural integrity. The slits divide the mount structure into regions that can deflect independently, reducing vibration transfer without compromising strength.
Solution Approach 2:
The patent applies local quality by concentrating flexibility features (damping holes with slits) at specific locations within the mount structure, while other regions maintain rigid metal-to-metal connections. This localized approach allows vibration damping where needed while preserving structural integrity in load-bearing areas.
3Object-generated harmful factors
If elastomers are used for vibration damping, then vibration attenuation is improved, but device complexity increases due to replacement requirements and complicated mounting systems
Solution Approach 1:
The patent merges the vibration damping function and the structural support function into a single metal component with integrated damping holes. This eliminates the need for separate elastomer elements and reduces mounting system complexity by providing a unified solution that performs both support and vibration attenuation functions.
Solution Approach 2:
The metal mount with damping holes serves multiple functions simultaneously: it provides structural support, enables metal-to-metal connections for thermal stability, and delivers vibration damping through its slit-configured holes. This multi-functionality eliminates the need for multiple separate components and simplifies the overall mounting system.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system effectively attenuates vibrations between engine and airframe components, maintaining structural integrity and durability, with tunable damping properties that can be adjusted for various frequencies and loading directions, minimizing weight addition and allowing for easy modification.
Implementation Method 1
At least one of the first and/or second openings operates as a damping hole with a series of slits disposed about the damping hole, so that the damping hole with the slits is configured to deflect to reduce the transmission of vibrations between the body and the frame
Data Source
AI summary
A mount system provides vibration isolation and support through a hybrid hard-soft configuration. The mount system includes a frame and a body connected with the frame. A first coupling element is provided on the body and defines a first opening. A second coupling element is provided on the frame and defines a second opening. A pin extends through the first and second openings to couple the body to the frame. At least one of the first and/or second openings operates as a damping hole with a series of slits disposed about the damping hole, so that the damping hole with the slits is configured to deflect to reduce the transmission of vibrations between the body and the frame.