Silencer air duct
By introducing a combination of flow guide holes, conical surfaces, and sound-absorbing layers into the silencing duct, the problem of poor noise reduction in existing silencing ducts is solved, and high, medium, and low frequency noise is effectively reduced.
CN223595406UActive Publication Date: 2025-11-25SICHUAN INSITITUTE OF BUILDING RES
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Patent Information
- Application Number
- CN202520151479.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-22
- Publication Date
- 2025-11-25
- Estimated Expiration
- 2035-01-22
AI Technical Summary
Technical Problem
Existing silencer ducts are not very effective at reducing airflow noise, especially for mid- to high-frequency noise.
Method used
It adopts a variety of noise reduction structural designs, including flow guide holes, conical surfaces and sound-absorbing layers, to reduce noise through airflow guidance, sound energy interference and friction conversion. The specific structure includes a combination design of front tube, middle tube, tail tube and flow guide.
Benefits of technology
It achieves comprehensive elimination of high, medium and low frequency noise, significantly improves the noise reduction effect, and reduces noise radiation during gas transmission.
✦ Generated by Eureka AI based on patent content.
Abstract
The silencing air pipe comprises a pipe shell and a flow guide body, the pipe shell has a front pipe, a middle pipe and a tail pipe, a plurality of flow guide holes are arranged in the front pipe, the inner wall of the middle pipe near one end of the front pipe has a first conical surface, the inner wall of the middle pipe near one end of the tail pipe has a second conical surface, the first conical surface and the second conical surface are coaxial with the pipe shell, a plurality of through holes are densely arranged on the side wall of the tail pipe, a sound absorption layer is arranged on the outer wall of the tail pipe, the outer part of the flow guide body is a cylindrical structure, the front end of the flow guide body has an outer conical surface, the flow guide body is coaxially arranged in the tail pipe, a gap is formed between the outer wall of the flow guide body and the inner wall of the tail pipe, the rear end of the flow guide body is directed to the rear end of the tail pipe, the outer conical surface is arranged in the middle pipe, and the outer conical surface is located at the same position as the second conical surface in the axial direction of the pipe shell, and the projection of the flow guide hole and the outer conical surface in the axial direction of the pipe shell partially overlaps.
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