Modular Resonator Design for Turbocharger Noise Adaptation
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Solution Overview
Problem
Existing resonators for reducing noise in exhaust gas turbochargers require complete rebuilding when installation volume or damping properties change, leading to high tool costs and limited adaptability.
Innovation Solution
A modular resonator design featuring U-shaped and I-shaped annular chambers with adjustable wall openings, allowing for flexible adaptation to different installation spaces and damping conditions without the need for tool-bound manufacturing processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a one-piece design of the chambers is used, then manufacturing precision is improved, but adaptability deteriorates because the resonator must be completely rebuilt when installation volume or damping properties change
Solution Approach 1:
The resonator is divided into multiple separate annular chambers (first, second, and third chambers) that can be assembled in different configurations. Each chamber can be manufactured independently using standard tools, and then combined to create resonators with different total volumes and damping characteristics, resolving the contradiction between manufacturing precision and adaptability.
2Manufacturing precision
If the resonator is designed as a complete rebuild unit, then manufacturing precision is maintained, but device complexity increases due to multiple components and assembly requirements
Solution Approach 1:
The annular chambers are designed to nest around a central inner tube, with each chamber positioned concentrically. This nested arrangement allows multiple chambers to be assembled in a compact, organized manner that maintains manufacturing precision while managing the complexity of having multiple components.
3Manufacturing precision
If tool-bound manufacturing processes are used, then manufacturing precision is improved, but ease of manufacture deteriorates due to high tool costs when adaptation is needed
Solution Approach 1:
The resonator's adaptation to different installation volumes and damping conditions is achieved by changing parameters such as the number of chambers, their individual volumes, and the geometry of wall openings in the inner tube, rather than requiring new tooling. This allows precise control of acoustic properties using standard manufacturing processes.
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
Enables cost-effective and easy adaptation to various installation spaces and damping conditions, achieving broadband damping through modular design and adjustable geometry, reducing noise effectively while minimizing production costs.
Implementation Method 1
the well-known mechanisms of action of the type of Helmholtz and/or λ/4 resonators, which serve to reduce the noise of the overall arrangement
Implementation Method 2
resonator for reducing airborne and structure-borne noise
Implementation Method 3
undesired flow noises occur as a result of speeds, imbalances and faults caused by production-related distortions. These flow noises are lowered over a wide range by appropriate resonators or dampers
Data Source
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AI summary
The invention relates to a resonator (1) for lowering airborne sound and solid-borne sound, comprising at least two annular chambers (2, 3, 17) arranged between an inlet piece (22) and an outlet piece (21) and comprising an inner pipe (4), which is arranged at least between the inlet piece (22) and the outlet piece (21) and which has wall holes (23) as a connection to the adjacent annular chambers (2, 3, 17). The invention is characterized in that a first annular chamber (2) has a U-shaped circumferential wall (6) coaxial to the resonator longitudinal axis (5), which U-shaped circumferential wall transitions at both ends into cylindrical end pieces (7, 8) for accommodating the inner pipe (4), and that at least one second annular chamber (3) has an L-shaped circumferential wall (12) coaxial to the resonator longitudinal axis (5), which L-shaped circumferential wall transitions into a cylindrical end piece (13) at the end of the L-shaped circumferential wall facing away from the first annular chamber (2) and which L-shaped circumferential wall lies on the part of the outer wall (9) of the first annular chamber (2) extending parallel to the resonator longitudinal axis (5) at the end (14) of the L-shaped circumferential wall facing the first annular chamber (2).