Silencer With External Reflux Tubes For Noise Reduction
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Solution Overview
Problem
Current silencers are complex in structure, making them difficult to manufacture and assemble, while also lacking an effective noise reduction mechanism.
Innovation Solution
A silencer design featuring a main air guide tube with assistant air guide tubes that split the airflow into two branches, where one branch flows continuously and the other undergoes a reflux, effectively reducing airflow speed and noise through a simple, evenly distributed arrangement on the outer wall of the main tube.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If assistant air guide tubes are added to split airflow and reduce noise, then silencing effect is improved, but device complexity increases
Solution Approach 1:
The assistant air guide tubes are nested on the outer wall of the main air guide tube, with both ends connected to the outer wall. This nesting arrangement allows the assistant tubes to be integrated into the existing structure without requiring separate mounting space, thereby reducing overall device complexity while still achieving the noise reduction function through airflow splitting.
Solution Approach 2:
The air guide tube is segmented into a main air guide tube and multiple assistant air guide tubes. The assistant tubes are evenly distributed on the outer wall and include guide sections and reflux sections that split the airflow into different paths. This segmentation enables the system to reduce noise by creating multiple flow paths while maintaining a relatively simple overall structure.
2Object-affected harmful factors
If various components are mounted in the air guide tube to reduce noise, then silencing effect is improved, but ease of manufacture and assembly deteriorates
Solution Approach 1:
Instead of mounting components inside the air guide tube (one-dimensional internal arrangement), the invention moves the assistant air guide tubes to the outer wall of the main tube (two-dimensional external arrangement). This dimensional change allows for easier manufacturing and assembly as the assistant tubes can be independently fabricated and then attached to the exterior, avoiding the complexity of internal component integration.
3Object-affected harmful factors
If airflow path is lengthened to reduce flow rate and noise, then silencing effect is improved, but device complexity increases
Solution Approach 1:
The assistant air guide tubes include guide sections that incline outwards and reflux sections that redirect airflow before it exits. This preliminary action of guiding and refluxing the airflow within the assistant tubes allows the main airflow path to remain relatively short while still achieving speed reduction and noise control, avoiding the need for excessively long exhaust paths.
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 a good silencing effect by doubling the speed reduction of airflow, simplifying the structure and manufacturing process, and reducing noise effectively without the need for additional components within the main air guide tube.
Implementation Method 1
an air flow may enter the air guide channel from the air inlet end and is divided into a first branch flow and a second branch flow when flowing through the air inlet; the first branch flow flows to the air outlet end continuously along the air guide channel; the second branch flow enters from the air inlet, and is exhausted from the air outlet along the assistant air guide tube and comes together with the first branch flow; and a flow direction of the second branch flow flowing out of the air outlet is opposite to that of the first branch flow
Data Source
AI summary
A silencer comprises a main air guide tube provided with an air guide channel; the main air guide tube comprises an air inlet end and an air outlet end; both ends of an assistant air guide tube are connected with an outer wall of the main air guide tube, and the assistant air guide tube comprises a guide section and a reflux section; the guide section is provided with an air inlet, and the air inlet is communicated with the air guide channel; the reflux section is provided with an air outlet, and the air outlet is communicated with the air guide channel.