Sound Reduction Ring With Flange For Vehicle Noise Attenuation
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Solution Overview
Problem
Rotating components in vehicles produce noise due to sound-inducing vibrations, which are not effectively attenuated by existing technologies, leading to discomfort for occupants.
Innovation Solution
A sound reduction assembly featuring a ring with a flange fixed to a housing, positioned to maximize sound attenuation by creating an impedance mismatch between rotating components and the housing, utilizing a body with corrugations and multiple flanges to absorb vibrations radially and axially, and tuned to specific stiffness for optimal noise reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If existing sound attenuation technologies are used, then the structure is simple, but the sound attenuation effectiveness is insufficient
Solution Approach 1:
The patent introduces a ring as an intermediary component positioned between the rotating component and the housing. This ring includes a body with corrugations and flanges that create an impedance mismatch, serving as a mediator to block sound transmission paths while maintaining structural integrity and rotational freedom.
Solution Approach 2:
The ring structure implements local quality by positioning corrugations and flanges at specific locations to create impedance mismatches where sound transmission occurs. The body includes a first portion with first-ring stiffness and a second portion with second-ring stiffness, optimizing sound attenuation at different locations along the high-load area.
2Object-affected harmful factors
If the ring is positioned to maximize sound attenuation, then noise reduction is improved, but the positioning precision requirement increases
Solution Approach 1:
The flange is fixed to the housing in advance to establish a predetermined position for the ring. This preliminary action ensures that the ring is positioned optimally for sound attenuation before the rotating component is installed, eliminating the need for precise positioning during final assembly.
Solution Approach 2:
The ring structure is designed to self-align and maintain its position through the fixed flange connection to the housing. The corrugations and stiffness variations in the ring body automatically position themselves to maximize sound attenuation during operation without requiring external adjustment mechanisms.
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 sound reduction assembly significantly reduces noise heard by occupants by effectively attenuating vibrations through strategic positioning and design, providing improved acoustic comfort in vehicles and other movable platforms.
Implementation Method 1
The ring is configured to attenuate sound inducing vibrations in response to operation of the component
Implementation Method 2
positioned to maximize sound attenuation by creating an impedance mismatch between rotating components and the housing
Data Source
AI summary
A sound reduction assembly includes a housing and a component supported via the housing. The component is movable relative to the housing. The sound reduction assembly includes a ring coupled to the component and the housing. The ring is configured to attenuate sound inducing vibrations in response to operation of the component. The ring includes a flange fixed relative to the housing to maintain a position of the ring relative to the component which maximizes attenuation of the sound in response to operation of the component. A method of utilizing a ring to attenuate sound inducing vibrations in response to operation of a component inside of a housing. A torque is selected to be applied to the ring. A stiffness of the ring is determined based on a stiffness-torque curve utilizing the selected torque to maximize attenuation of the sound. The ring is manufactured to meet the determined stiffness.