SU1252515A1 - Internal combustion engine exhaust silencer - Google Patents

Description

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The invention relates to mechanical engineering, in particular to exhaust emission silencing engines for internal combustion engines of both general and industrial purpose.

The purpose of the invention is to improve the efficiency of jamming noise due to swirling flow, its repeated expansion and contraction.

Fig, 1 shows a silencer, cut; in fig. 2 is a section A-A in FIG. one; in fig. 3 - view B in FIG. I; in fig. 4 shows a section B-B in FIG. one.

The exhaust silencer of the internal combustion engine contains a cylinder housing 1 equipped with an inlet 2 and an outlet 3 nozzles. Case 1 is divided into inlet 4, outlet 5 and central 6 and 7 chambers using partitions 8-10. The baffle 9 is provided with peripheral tubes I1 of different lengths with beveled outlet ends facing slants towards the center of the chamber 7, and a central tube 12 connected to the discharge chamber 5 and provided with perforations 13, made at the front end of the tube 12, and a slit vortex 14 placed on its output end. The central tube 12 at the point of exit into the outlet chamber 5 is extended with respect to the edge of the slotted swirler 14 by an amount equal to 1.0-2.5 times the gap between the inner surface of the swirler 14 and the central tube 12.

In the outlet chamber 5, a screen 15 can be installed, made as a truncated Kdpnyca, facing a smaller base towards the outlet tube 3, and connected to the housing 1 at the large base of the cone with Monyi jumpers 16 to form a gap between the housing 1 and the base of the cone , moreover, the area of the gap between the housing I and the base is made 1.5-2.0 times the area of the inlet 152

2. A part of the inlet pipe 3 can be dispersed in the outlet chamber 5, connected to the smaller base of the screen 15 and provided with openings 17, the total cross section of which is 1.5-2.0 times larger than the cross section of the inlet pipe 2

The silencer works as follows.

By entering the inlet chamber A, the gas flow is reflected from the bulkhead 8 and directed by the wings 18 the vortex 19 moves in the opposite direction to turbulize the flow. Once in the slots of the wings 18, the vortex 19, the flow twists, stabilizes and enters the chamber 6. The rotating flow is divided into zones of different pressure. The peripheral part of the flow is captured by tubes I 1 and fed into the inlets of the swirls 14, the central part of the flow of the chamber 6 is fed into the chamber 7, where it is turbulized in the cavities created by the inlets of the swirler 14 and thus equalizes the pressure in the chamber 7, creating a condition for a targeted flow gas from the tubes 11 In the swirler 14, the flow re-twists and rotates into the shut-off chamber 5, while it is directed to the periphery of the chamber 5, which creates conditions for the occurrence of a zone of reduced pressure 12 tube

As a result of the created zone of reduced pressure, the enhanced gas suction through tube 12 from the chamber 6 of the pro- “descent” comes off. The gas flow, entering the chamber 5, hits the screen 15 and is dissipated. In connection with the increased clearance of the gap between the silencer housing 1 and the screen 15, as well as the increased total cross-section of the holes in the exhaust port 3, the gas freely exits to the atmosphere.

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Claims (3)

1. SILENCER OF EXHAUST NOISE OF THE INTERNAL COMBUSTION ENGINE, comprising a cylindrical body provided with an inlet and outlet pipe, divided into inlet, outlet and central chambers by means of baffles, the middle baffle provided with peripheral tubes of different lengths with chamfered exhaust ends facing the chamfers and a central tube connected to the outlet chamber and provided with perforations made at the inlet end of the tube and a slotted swirler located at its outlet end, distinguishes yuschiysya in that, in order to increase the effectiveness of noise damping, a central tube in place in the outlet chamber outlet pushed towards the edge of the gap swirl by an amount equal to 1.0-2.5 of the gap between the inner surface of the swirler and the central tube. 2. Silencer according to π. 1, characterized in that the outlet chamber has a screen made in the form of a truncated cone, facing a smaller base to the outlet pipe, and connected to the housing at the larger base of the cone using jumpers to form a gap between the housing and the base of the cone, the gap between the body and the base is 1.5-2.0 times the area of the inlet pipe. 3. Silencer according to π. 1, characterized in that a part of the exhaust pipe is placed in the exhaust chamber, connected to a smaller base of the screen and provided with openings, the total cross section of which is 1.5-2.0 times larger than the cross section of the inlet pipe. 1 12