CN2117473U

CN2117473U - Labyrinth silencer

Info

Publication number: CN2117473U
Application number: CN 92202843
Authority: CN
Inventors: 刘国全
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-02-25
Filing date: 1992-02-25
Publication date: 1992-09-30

Abstract

The utility model provides a labyrinth silencer which is suitable for internal combustion engines, belongs to the power machine manufacturing field and solves the technical problem of enhancing silencing effect and reducing exhaust resistance. According to sound directional characteristic, the utility model utilizes labyrinth branches and changes the airflow direction to generate relative shock and achieve the silencing effect. The labyrinth silencer is characterized in that the internal structure is mainly provided with a group of labyrinth walls branching and redirecting the airflow to generate the relative shock.

Description

Labyrinth silencer

This is novel to provide a kind of mazy type silencing apparatus, is applicable to explosive motor, belongs to dynamic power machine and makes the field.

At present, the engine exhaust muffler pipe adopts floral tube formula, filtering type, noise elimination DeGrain more, and exhaust resistance is big, is unfavorable for the engine power performance.

The present utility model purpose is: strengthen the noise elimination effect, reduce the engine exhaust resistance.

Design is the vibration wave of being made up of air vibration and vibration frequency according to noise, and the consistent noise of same vibration wave direction increases, and the principle of the opposite acoustic noise reducing of direction realizes; Be to utilize the labyrinth to change airflow direction along separate routes, produce the phase impact, reach the noise elimination effect.Its profile of mazy type silencing apparatus does not have particular point, it is characterized in that: internal structure mainly is to have one group to make air-flow along separate routes, changes the labyrinth wall that direction produces the phase impact, please refer to accompanying drawing.

Accompanying drawing 1 is the vertical section structure front view of deltiod mazy type silencing apparatus, and 1 is shell among the figure, 2 asbestos damping separation layers, 3 suction ports, 4 air inlet buffer cells, 6 labyrinth walls, make of the bar shaped sheet iron, fix by 5,8 stay bolts and nut and form labyrinth wall group, and fix with shell.The 7th, exhaust buffer cell, 9 relief openings.

Deltiod mazy type silencing apparatus is specially adapted to small-sized, square engine, and working principle is as follows:

The vibratory flow that motor is discharged enters buffer cell by suction port, cushion laggard fascinated palace wall group, change direction, be split into equal and opposite in direction, two strands of air-flows that direction is opposite produce the phase impact in the ingress of following one labyrinth wall, make noise attentuation, through repeatedly becoming air-flow more stably after the decay, enter the exhaust buffer cell, the buffering back is disperseed to discharge by relief opening.

Fig. 2 is garden shape mazy type silencing apparatus vertical section structure figure, and Fig. 2 icon is consistent with Fig. 1.Fig. 3 is 6 among Fig. 2, atresia labyrinth wall, and among the figure the 1, the 2nd, screw hole, the 3rd, the edge that levers up.Fig. 4 is 11 among Fig. 2, porose labyrinth wall, and 1 is the edge that levers up among the figure, the 2nd, center hole, the 3, the 4th, screw hole.

Fig. 2 silencing apparatus labyrinth wall group and compound mode are applicable to the rectangular silencing apparatus, and its working principle is consistent with the principle of Fig. 1, and difference is wall garden, labyrinth shape structure, and gas circuit is shunted the change direction around the garden, to the relative impact-attenuating noise in wall center, porose labyrinth.

For reaching above effect, this novel should designing and producing according to following principle.

(1) the form area of suction port is consistent with engine exhaust port, helps cooperating installing.

(2) area of relief opening is less than the suction port area, and relief opening is 1/2 to 1/3 of a steam inlet, and the degree of lip-rounding helps steam flow and disperses to discharge.

(3) the road number of labyrinth wall will be according to the noise design that allows to discharge, more than the Ying Zaiwu road, the edge that labyrinth wall air communication is crossed will lever up to the air-flow opposite direction, and air-flow path section area will be satisfied level according to the area of suction port and be narrowed down to exhaust port area, satisfies the level attenuate acoustic noise to ensure.

(4) urban district and blowdown require tight occasion to use, and should install air filtration unit additional at the silencing apparatus relief opening during design, make it become the perfect noise elimination blowdown equipment that noise is low, pollution is little.

Compare with existing noise elimination technique, this is novel to have following advantage:

(1) noise elimination effect is obvious, helps reducing the urban district noise pollution.

(2) exhaust resistance is little, helps the engine power performance.

(3) the phase impact is eliminated the noise, and helps fire prevention.

(4) simple in structure, be easy to make.

Claims

A kind of mazy type silencing apparatus, feature is: in above iron labyrinth, three roads wall dividing plate is arranged, be assembled into labyrinth wall group with bolt with the ventilation of being separated by, make round about along separate routes, to the air-flow path that opposite direction is converged, the edge, passway rises to relative wind direction sledge.