Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Composite chimney silencer

A technology of muffler and chimney, applied in machine/engine, combustion product treatment, combustion method, etc., can solve the problem of difficulty in meeting the noise reduction requirements of high-pressure fan chimney, achieve the quality indicators of sound environment, reduce smoke exhaust resistance loss, Optimizing the effect of the aerodynamic structure

Active Publication Date: 2014-03-26
XIAMEN JIADA OF ACOUSTIC TECH CO LTD
View PDF11 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the deficiency that the existing chimney mufflers are difficult to meet the noise reduction requirements of high-pressure fan chimneys with large air volume and high noise level

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Composite chimney silencer
  • Composite chimney silencer
  • Composite chimney silencer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] in figure 1 , 2 In the embodiments shown in, 3 and 4, a composite chimney muffler includes a bearing steel structure, a cylindrical steel structure shell (1), and an impedance composite muffler structure. The cylindrical steel structure shell (1) is provided with an inner sound insulation layer (2) and a sound absorption layer (3), and the air inlet diversion section (4), oil barrier structure layer (5), The wedge sound-absorbing structure (6), the annular structural plate (7), the expansion anechoic chamber (8), the wind noise silencing louver (9); the wedge sound-absorbing structure (6) is a single-point wedge structure, It is composed of a tip (10) and a base (11). The arc-shaped fluid conductor (12) at the top of the tip (10), the wedge sound-absorbing structure (6) is arranged in multiple layers, and each layer has multiple wedge sound-absorbing structures (6) Arranged in parallel, evenly distributed on the vertical plane of the silencing channel, the wedge sound-ab...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a composite chimney silencer which comprises a bearing steel structure, a cylindrical steel structure shell and an impedance composite silencing structure. The composite chimney silencer is characterized in that the cylindrical steel structure shell is provided with an inner sound-insulation layer, a sound-absorption layer, an air inlet guiding section, an oil-blocking structure layer, wedge sound-absorption structures, an annular structure board, an expansion silencing chamber and an air outlet silencing louver, wherein the air inlet guiding section, the oil-blocking structure layer, the wedge sound-absorption structures, the annular structure board, the expansion silencing chamber and the air outlet silencing louver are arranged from bottom to top in sequence; each wedge sound-absorption structure is a single-wedge structure and composed of a sharp portion and a base portion, a circular arc flow guiding body is arranged at the top end of the sharp portion, the wedge sound-absorption structures are arranged at multiple layers, the wedge sound-absorption structures at each layer are arranged in parallel and are distributed on the vertical plane of a silencing channel in a balanced mode, identical channel gaps are reversed between the base portions of the wedge sound-absorption structures, and every two layers of wedge sound-absorption structures are arranged in an intersecting mode. The requirements for the large blast capacity and high-pressure positive blower chimney noise reduction at a high-noise level are satisfied, the insertion loss is equal to or larger than 40dB(A), and a sound environment quality index of residents around a chimney is guaranteed.

Description

Technical field [0001] The invention relates to the technical field of noise control, in particular to a composite chimney muffler which can effectively absorb and block the noise transmission of the chimney. Background technique [0002] The chimney noise is the noise from the discharge outlet of the high-pressure fan. Due to the high noise level of the high-pressure fan, the noise spectrum is a wideband noise dominated by medium and low frequencies, low frequency noise has strong penetrating power, poor directivity, and strong diffraction ability. Generally, the chimney is very high, and the air outlet is also very high. There is no effective barrier to block the environment, which affects the surrounding environment in a considerable area, which greatly affects the lives of residents. [0003] Chinese patent CN 2615515U discloses a "large fuel gas boiler chimney muffler". It is provided with a circular muffler in the middle of the chimney, inside and outside cylinder walls are ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/66F23J13/00
Inventor 杨锦勇何鹭凤宋继萍蔡伟强林嘉祥
Owner XIAMEN JIADA OF ACOUSTIC TECH CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com