SU1010307A1 - Gas jet noise silencer - Google Patents

Abstract

1. A gas flow noise silencer containing a cylindrical body with axial inlet and outlet nozzles, divided by the first, second and third partitions into the inlet, first and second intermediate and exhaust chambers, slotted guides installed in the first and third partitions, the central pipe with the inlet end located in the first intermediate chamber, and with the outlet end located in the outlet chamber, will install / LG suspended in the second partition parallel to the axis of the silencer tube of different lengths, which is directed away from the axis, and with bevels of output ends directed to the axis, characterized in that, in order to increase the efficiency of sound attenuation, the additional resonance chamber adjacent to the first partition, connected to the inlet pipe through the annular gap, tangential slotted swirler, "adjacent to the first partition, and connected to the inlet chamber through a slit swirl with flat blades, mounted on a remote ko from the partition end of the resonant chambers , Slotted guide apparatus of the first partition wall is formed as a curved blades mounted in the annular gap, and each tube is provided with swirler belt. / ff

Description

2. The muffler according to claim 1, about tl and h a y i and c. by the fact that the gap in the first intermediate chamber between the first perpendicular and the inlet end of the central tube is made equal to 0.10, 5 of the internal diameter of the pipe.

3- A silencer according to claims 1 and 2, of which there is one, in that the guiding apparatus in the third partition is made in the form of a multi-pass07

Noah screw winding covering the output end of the central tube and placed in a cylindrical spacer: for a length of 1.5-3 of its internal diameter, reinforced in the third partition.

U. The silencer of claims 1-3, which is based on the fact that the tangential and slotted swirlers and curved blades are made with the opposite direction of twist.

one

This invention relates to a technique for damping noise, preferably exhaust from an internal combustion engine.

A gas flow noise silencer is known, comprising a cylindrical body with axial inlet and outlet nozzles, divided by first, second and third partitions into inlet, first and second intermediate and exhaust chambers, slotted guiding devices installed in the first and third partitions, the central pipe with the inlet end located in the first intermediate chamber and with the outlet end located in the outlet chamber installed in the second partition parallel to the axis of the muffler tube of different lengths, increasing moving away from the axis, and with bevels of output ends directed to the axis.

The well-known silencer has a fairly good silencing ability, but when resonant oscillations of a gas column occur in the inlet pipe, the walls of the exhaust chamber can emit into the environment unpleasant sound vibrations — ringing.

The aim of the invention is to increase the efficiency of sound attenuation. The goal is achieved by the fact that in a silencer comprising a cylindrical body with axial inlet and outlet pipes, divided by the first, second and third partitions into the inlet, first and second intermediate and exhaust

chambers, slotted guiding devices installed in the first and third partitions, a central tube with an inlet end located in the first intermediate chamber and with an outlet end located in the outlet chamber mounted in the second partition parallel to the axis of the silencer tube of different lengths, increasing with distance from the axis, and with the bevels of the output ends directed to the axis, in the inlet chamber there is an additional resonant chamber placed with an annular gap, adjacent to the first partition along the end, communicating with the inlet PA tube through a tangential slit swirl adjacent to the first partition, and connected to the inlet chamber through a slit swirl with flat blades installed on the end of the resonant chamber remote from the partition, the target guide apparatus of the first partition is made in the form of curved blades installed in an annular gap, and Each tube is made with a swirler.

The gap in the first intermediate chamber between the first partition and the inlet end of the central pipe can be made 0.1-0.5 of the internal diameter of the pipe.

The guide vane in the third partition can be made in reed multiple winding covering the output end of the central tube and placed in a cylindrical spacer 1.3–3 its inner diameter, reinforced

in the third partition. Tangential and slotted. Swirlers and curved blades can 6Mtb are made with the opposite direction of twist.

Figure 1 shows a diagram of a gas flow noise silencer; in figure 2. part of a slotted swirl with flat blades, axonometrics; in FIG. 3, in a spatial image, a part of a slotted guide vane in the third partition, made in the form of curved blades; in fig. - in the spatial image tape swirler; Fig. 3 shows a slotted guide apparatus in the third partition, made in the form of a multiple-thread helical winding which seizes the output end of the central tube and is placed in a cylindrical spacer 1.5-3 times its inner diameter, reinforced in the third partition.

The silencer contains a cylindrical body 1 with axes inlet 2 and outlet 3 pipes, divided by the first k, the second 5 and the third 6 partitions on the inlet 7, the first 8 and second 9 intermediate and outlet 10 chambers, slot-hole guiding device 11 in the first partition k , made in the form of curved blades installed in the annular gap, slot-hole guiding device 12 in the third partition 6, made in the form of a multiple-thread helical winding, extending the output end of the central pipe 13 with an input end located in the first space the combo chamber 8, and with the outlet end located in the outlet chamber 10, mounted in the second partition 5 parallel to the axis of the silencer tube 1 of different lengths increasing with distance from the axis, and with the bevels directed to the axis of the output ends, placed with an annular gap о in chamber 7, an additional resonant chamber 15, adjacent to the first partition i by an end face, communicated with inlet 2 through

tangential slotted swirler

16, adjacent to the first partition t, and connected to the inlet chamber 2 through a slotted swirler 17

with flat blades, mounted on the end of the resonance chamber 15 remote from the partition, tape swirlers 18 placed in tubes 1, a cylindrical spacer 19 with a length of 1.5–3 of its internal diameter fixed in the third partition 6 with guide device 12 placed in it.

 The silencer works as follows.

The gas stream flows through the internal nozzle 2 to the tangential slotted swirler 1b, splits there, twists and, falling into the resonant chamber 15, moves in the opposite direction to the slotted swirler 17, where it continues to sweat and changes the direction of twist.

The gas flow, passed the swirler 16, the chamber 15 and the swirl

17, loses most of the sound energy. In the first intermediate chamber 8, the gas stream enters after twisting in the guide apparatus 11 and is divided therein into two streams. Most of the gas flow through tubes of 14 different lengths, made with ribbon swirlers

18 enters the guiding apparatus 12, made in the form of a multiple-thread helical winding, and through the cylindrical spacer 1E enters the discharge chamber 10. Another part of the gas flow enters the exhaust chamber 10, where the separated flows mix, along the central tube 13. Outside the silencer gas flow is discharged through the outlet 3.

Improving the efficiency of sound attenuation is achieved due to repeated mixing and changes in the volume of the gas stream.

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Claims (3)

1. GAS FLOW NOISE MUFFLER, comprising a cylindrical body with axial inlet and outlet nozzles, divided by the first, second and third partitions into the inlet, first and second intermediate and exhaust chambers, slotted guide devices installed in the first and third partitions, a central pipe with an inlet the end located in the first intermediate chamber, and with the output end located in the exhaust chamber, installed in the second partition parallel to the axis of the muffler of a tube of different lengths, increasing with the distance from the axis, and with the bevels directed towards the axis of the output ends, characterized in that, in order to increase the noise attenuation efficiency, an additional resonance chamber is placed in the inlet chamber with an annular gap, adjacent to the first partition end-face, communicated with the inlet pipe through a tangential slotted swirler, “Adjacent to the first partition, and connected to the inlet chamber through a slotted swirl with flat gates, mounted on the end face of the resonance chamber remote from the partition, I direct the slotted direction s first partition wall unit is made in the form of curved vanes mounted · ^ GOVERNMENTAL in the annulus, and each tube is provided with swirler belt. 2. Silencer according to π.1, from the list of sec. I mean that the gap in the first intermediate chamber between the first partition and the inlet end of the central pipe is equal to 0, ΙΟ, 5 of the inner diameter of the pipe. 3- The muffler according to claims 1 and 2, with the exception that the guide apparatus in the third partition is made in the form of a multi-start screw winding, covering the outlet end of the central pipe and placed in a cylindrical spacer of length 1 , 5 ~ 3 of its inner diameter, fortified in the third partition. G ". A silencer according to claims 1 to 3, characterized in that the tangential and crevice swirls and curved blades are made with the opposite direction of twist.