Compact Silencer with Nested Attenuators and Detachable Valve
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Solution Overview
Problem
Existing silencers face challenges in attenuating sound in a wide frequency range and maintaining valve portions for preventing backflow, particularly in compact configurations.
Innovation Solution
A silencer design featuring a housing with draw-in and draw-out portions, multiple sound attenuating sections, a valve portion at the most downstream section, and a detachable valve holding portion, along with a biasing member to prevent backflow, allows for effective sound attenuation across a wide frequency range while enabling easy maintenance without detaching downstream piping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the silencer is made compact with a small length, then space is saved, but sound attenuation in a wide frequency range becomes insufficient
Solution Approach 1:
The silencer employs a nested structure where the intermediate communicating portion is positioned concentrically within the housing, and the valve portion is integrated within the intermediate communicating portion. This nesting allows multiple functional components to occupy overlapping spatial volumes, achieving wide frequency sound attenuation without increasing the overall silencer footprint.
Solution Approach 2:
The patent utilizes the radial dimension by positioning the intermediate communicating portion and valve portion concentrically within the housing rather than extending linearly. This dimensional transition from linear to radial arrangement enables compact configuration while maintaining effective sound attenuation paths for wide frequency ranges.
2Reliability
If the valve portion is positioned at the coupling site of the inlet pipe and intermediate pipe, then backflow prevention is achieved, but maintenance accessibility becomes difficult
Solution Approach 1:
The valve portion is extracted from its traditional position at the coupling site and relocated to the intermediate communicating portion, which is accessible from the downstream end of the housing. This extraction allows the valve to maintain its backflow prevention function while becoming accessible for maintenance without requiring disassembly of downstream piping.
Solution Approach 2:
The intermediate communicating portion serves as an intermediary space that accommodates the valve portion and provides access to it. This intermediary structure allows the valve to be positioned for both functional effectiveness in backflow prevention and practical accessibility for maintenance operations.
3Object-generated harmful factors
If multiple sound attenuating portions are arranged in the flowing direction, then wide frequency sound attenuation is achieved, but the silencer length increases
Solution Approach 1:
Multiple sound attenuating portions are nested concentrically within the housing rather than being arranged linearly along the flow path. The intermediate communicating portion and valve portion are positioned within the housing volume, allowing multiple attenuation mechanisms to coexist in a compact radial arrangement that maintains wide frequency sound attenuation without extending the silencer length.
Solution Approach 2:
The patent transitions from linear arrangement of attenuating portions to a radial/concentric arrangement within the housing. This dimensional change enables multiple sound attenuation paths to be packed into the available volume without increasing the axial length of the silencer, achieving wide frequency attenuation in a compact configuration.
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 design achieves effective sound attenuation in a wide frequency range and facilitates simple maintenance of the valve portion, preventing backflow while maintaining a compact configuration.
Implementation Method 1
a plurality of sound attenuating portions arranged in a flowing direction of the fluid
Implementation Method 2
providing the first partition between the attenuating portions with the intermediate communicating portion, sound waves can be attenuated in a wide frequency range
Implementation Method 3
a biasing member to prevent backflow
Data Source
AI summary
A silencer includes: a housing that has a draw-in portion drawing in fluid, and a plurality of sound attenuating portions arranged in a flowing direction of the fluid; a first partition provided with an intermediate communicating portion communicating the most downstream attenuating portion with the adjacent attenuating portion located adjacent to the most downstream attenuating portion; a valve portion disposed in the most downstream attenuating portion, the valve portion being capable of closing the intermediate communicating portion; a valve holding portion holding the valve portion, the valve holding portion being detachably attached to the housing; and a draw-out portion provided in a portion of the most downstream attenuating portion other than the valve holding portion, the draw-out portion drawing out the fluid from the most downstream attenuating portion.