Transverse flow perforated pipe silencer structure with flow blocking grid
A perforated tube and muffler technology, applied in the field of cross-flow perforated tube muffler structure, can solve the problems of no effective control of exhaust back pressure and complex structure, and achieve good aerodynamic performance, improved frequency characteristics, and good noise reduction effects
Active Publication Date: 2015-06-17
SHANDONG UNIV
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Problems solved by technology
It has the advantages of small flow resistance and no regenerative noise, but the structure is complex, and the exhaust back pressure is not effectively controlled
Method used
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[0017] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0018] Such as figure 1 , figure 2 and image 3 As shown, the cross-flow perforated pipe muffler structure with flow-blocking grille includes expansion chamber cylinder 1, cross-flow perforated pipe 7, blocking plate 3, grille inner ring I4, grille outer ring I5, grille inner ring II8, and Grid outer ring II 9, grid inner ring III 12, grid outer ring III 13, the expansion chamber cylinder 1 passes through the blocking plate 3, the grid inner ring I4, the grid outer ring I5, two grid inner rings II8, two grille outer rings II9, divide the cylinder body into chambers I2, chamber II10, chamber III6 and chamber IV11 which are connected to each other through the gap between the grille structures; the cross-flow perforated pipe 7 is along the cylinder body Arranged in the axial direction, the inside of the cross-flow perforated pipe 7 is divided into two ...
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The invention discloses a transverse flow perforated pipe silencer structure with a flow blocking grid. The transverse flow perforated pipe silencer structure with the flow blocking grid comprises an expansion chamber barrel, a transverse flow perforated pipe, a plug board and grid rings. The transverse flow perforated pipe is arranged in the axial direction of the expansion chamber barrel and divided into two parts which are not communicated in a front-and-back mode through the plug board, and a plurality of chambers are formed longitudinally in a divided mode between the transverse flow perforated pipe and the expansion chamber barrel through the grid rings. Each grid ring comprises a grid inner ring and a grid outer ring, and an annular gap is formed between the grid inner ring and the outer grid ring. The chambers are communicated mutually through the annular gaps, and the transverse flow perforated pipe is communicated with all the chambers through penetrated holes in the transverse flow perforated pipe. The transverse flow perforated pipe silencer structure is simple, exhaust back pressure is reduced obviously, frequency characteristics of a silencer are improved, and an exquisite design scheme of the silencer is provided.
Description
technical field [0001] The invention relates to a cross-flow perforated pipe muffler structure, in particular to a cross-flow perforated pipe muffler structure with a flow blocking grid. Background technique [0002] Resistant mufflers are one of the main ways to control the noise of construction machinery. The improvement of muffler design level is of great significance for improving the quality of construction machinery in my country. Insertion loss and pressure loss are the key factors to evaluate the noise reduction performance and aerodynamic performance of mufflers. Two very important evaluation indicators. Design research to improve the muffler, so that while increasing the transmission loss, it is an important means to reduce noise by ensuring that the pressure loss is within the range required by the engine. The cross-flow perforated tube muffler is widely used in the exhaust noise control of internal combustion engines because of its wide muffler frequency band and...
Claims
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IPC IPC(8): F01N13/00
Inventor 周以齐薛源王丽白儒
Owner SHANDONG UNIV