Compressor Discharge Noise Reduction via Segmented Porous Plates
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Solution Overview
Problem
The existing noise reduction silencers for superchargers are limited by space constraints, restricting their noise reduction effectiveness on the air discharge side due to limited pipe length.
Innovation Solution
A noise reduction structure featuring a compressor discharge-side pipe with a first porous plate and a partition that divides the pipe into multiple flow paths, accompanied by a second porous plate, which increases the noise reduction effect per length unit by forming air layers that function as acoustic filters, and allows for adjustable flow path resistance to achieve uniform flow distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a conventional silencer with double pipe structure and resonance cavity is used, then noise reduction on air discharge side is achieved, but the noise reduction effect is restricted due to limited pipe length between compressor and air cooler
Solution Approach 1:
The pipe interior is divided into multiple flow paths using partitions, creating multiple segments for noise reduction. The first porous plate divides the single flow path into multiple paths, and the second porous plate further divides each path into sub-paths, effectively segmenting the flow to increase noise reduction within limited space
Solution Approach 2:
The invention transitions from a single-flow-path structure to a multi-flow-path structure by introducing partitions that divide the pipe interior. This dimensional change in flow path configuration increases the effective noise reduction area without extending the pipe length
2Object-affected harmful factors
If the pipe length is increased to improve noise reduction, then noise reduction effect is enhanced, but space limitations between compressor and air cooler are exceeded
Solution Approach 1:
The interior of the compressor discharge-side pipe is segmented into multiple flow paths using partitions. The first porous plate creates multiple flow paths, and the second porous plate further segments each path, increasing the noise reduction surface area within the existing pipe volume without requiring additional space
Solution Approach 2:
Porous plates are used to create acoustic filters that reduce noise while allowing air flow. The first porous plate extends along the inner circumferential surface, and the second porous plate is provided in each flow path, utilizing porous material properties to achieve noise reduction within the limited pipe volume
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
This configuration effectively enhances noise reduction on the air discharge side of the supercharger by increasing the installation area of porous plates, achieving higher noise reduction efficiency with a simple structure while minimizing energy loss.
Implementation Method 1
the first porous plate and the air layer function as an acoustic filter, as well as the second porous plate and the air layer function as an acoustic filter, which make it possible to reduce noise that passes through the noise reduction structure
Data Source
AI summary
A noise reduction structure includes a compressor discharge-side pipe portion, a first porous plate having a plurality of through holes and extending circumferentially along an inner circumferential surface of the compressor discharge-side pipe portion so that an air layer is formed between the first porous plate and the inner circumferential surface, a partition dividing an interior of the compressor discharge-side pipe portion in a radial direction in a circumferential direction of the compressor discharge-side pipe portion so as to form a plurality of flow paths in the compressor discharge-side pipe portion, and a second porous plate having a plurality of through holes. The second porous plate is provided in each of the plurality of flow paths and extends along the partition so that an air layer is formed between the second porous plate and the partition.