SU1040195A2 - Muffler - Google Patents

Abstract

Noise silencer on Aut. St. No. 7,71726, characterized in that, in order to reduce its dimensions, the transverse partitions are located on opposite sides of the channel and offset along its length with alternation of successive reduction of the resonator chambers on the sides of the channel.

Description

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The invention relates to the killing of aerodynamic noise arising mainly in exhaust systems of internal combustion engines.

According to the main auth. No. 761726 is known for a silencer containing a channel and resonant chambers communicated with it, the channel being made with an increase in flow areas from the source noise with a uniform decrease in height and width, and provided with longitudinal partitions dividing the channel and forming resonator chambers with cross partitions, and the transverse partitions the section and length of each subsequent camera noise source is less than the cross section and length of the previous camera 1

In a known silencer, it is necessary to increase the number of resonant chambers in order to expand the range of noise suppression. However, the length of the silencer is increased.

The purpose of the invention is to reduce the size of the muffler.

To achieve this goal, in the silencer, the transverse partitions are located on opposite sides of the channel and are shifted along its length with alternating successive reduction of the resonator chambers on the sides of the channel.

On .fig. 1 shows a silencer, longitudinal section; in fig. 2 the same, side view; in fig. 3 - the same, top view; in fig. 4 is a section A-A in FIG. one; in fig. 5 is a section BB in FIG. one; in fig. 6 is a section on BB in FIG. 1 in FIG. 7 - section G-Y in FIG. one; in fig. 8 a section dd in fig. one; in fig. 9 is a section EE of FIG. one.

The device comprises an inlet 1, connected to the through channel 2 of the silencer, which has a width increasing from the noise source and a decreasing height with increasing channel bore, the through channel 2 is bounded by the edges of the transverse partitions 3 and the side walls 4.

The transverse 3 and longitudinal 5 partitions together with the side machines 4 form resonator chambers 6, 7, 8, the closed ends of which are formed by the lid 9. The transverse partitions 3 are installed parallel to each other. The free edges of the transverse partitions 3 form the shape of the through channel 2 nq in height. Longitudinal partitions 5 coming from the covers 9

through the through channel 2, are placed according to the scheme shown in FIG. 4-8.

The cross-sectional shape of the resonator chambers is shown in FIG. 4. To the gas outlet hole of the through channel 2, the outlet 10 is connected. Sequentially, from the noise source, decreasing along the cross section and length of the chamber, alternately, are located in the opposite sides of the through channel 2, i.e. camera 7 is smaller in length and nof pepper section than camera 6, the next camera is located next to camera 6, and so on.

The gas enters the inlet 1, then into the through channel 2, where the longitudinal partitions 5 are divided into a channel of smaller width, which in total does not reduce the area of the through channel. Then the gas goes through the pipe 10 into the atmosphere. When gas-1 passes through channel-2, the sound waves interact with a set of resonator chambers, each of which is a quarter-wave process for a narrow noise spectrum with overlapping cameras along the muffled spectrum.

The resonator chamber 6 of the greatest length (volume) muffles the narrow spectrum of the lowest-frequency sound from the muffled noise. For an adjacent, more high-frequency, narrow spectrum of noise, a quarter-wave process will be a camera7 of shorter length (volume), etc.

Resonator chambers that silence the sounds of a specific frequency spectrum for higher frequencies may turn out to be half-wave processes and will amplify these high frequencies.

But these further amplified components of the sound will further find their quarter-wave processes from a set of shorter resonator chambers and then muffle them as they move further towards diminishing length (volume) resonator chambers in the through channel of the silencer.

Performing an alternating muffler with continuously decreasing resonator chambers at opposite sides of the through channel allows, while maintaining the effectiveness of sound attenuation, reduce the length and flow resistance of the silencer, thereby reducing the cost of useful power for the purpose of sound attenuation.

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Claims (1)

NOISE MUFFLER St. No. 761726, distinguished by the fact that, in order to reduce its dimensions, the transverse partitions are located on opposite sides of the channel and are displaced along its length with alternating sequential reduction of the resonator chambers on the sides of the channel.