SU1301995A1 - Silencer-sparker - Google Patents

Abstract

The invention relates to engine construction and allows increasing the efficiency of the spark-suppressor. The device consists of an oval-shaped case, coaxially with a perforated resonator with swirlers and a conical nozzle. The resonator is made in the form of two coaxial tubes 5. The ends of the second tube of the resonator are removed from the adjacent ends of the first tube and the outlet nozzle 3 at distances equal to 0.8-0.9 and 0.2-0.3 diameters of the tubes 5 respectively. The latter swirlers 7 with guide vanes have a number of holes. The parameters of the swirler / and the resonator tubes are dependent on the mathematical expression. Each of the partitions 4 of the housing 1 is made with a one-sided perforation with holes 9 of equal diameter lying on the extension of the axes of the holes of the resonator tube. The holes are located on opposite sides of the small axis of the oval body. Part of the exhaust gas stream (FG), the passage through these openings, is crushed into separate streams, obtaining a vertical upward direction. It is then connected to a portion of the gas stream passing through the blades, and is corrected in the direction of motion. Next, the flow falls on the upper edge of the end section of the tube 5 of the resonator and, reflecting from the latter, provides intensive mixing. The remainder of the exhaust gas passes through the openings in the partitions 4 and intersects with the outflows from the holes of the resonator tube. A. Mutual redemption of sound waves of streams occurs in a wide range of frequencies. Similar processes occur when the exhaust gas passes through the upper tube of the resonator. 2 Il. with S (L with so g

Description

FIELD OF THE INVENTION The invention relates to mechanical engineering, in particular, engine-building, in particular, to a silencing m-spark arrestor, mainly an internal combustion engine.

The purpose of the invention is to increase the effectiveness of the silencer-destructor.

FIG. 1 shows a silencer spark arrestor, a longitudinal section; in fig. 2 is a section A-A in FIG. one.

The spark arresting silencer contains an oval-shaped case 1 with inlet 2 and outlet 3 nozzles, installed in case 1 with help, and transverse partitions 4 coaxial perforated resonator, made in the form of two coaxial pipes 5 and a conical nozzle 6, matched with a larger base with the first pipe 5, and a smaller base with an inlet pipe 2. Inside the pipes 5, swirlers 7 are installed, made in the form of partitions with guide vanes and holes 8. The ends of the second resonator y from the inlet pipe 2 aJreny from the adjacent end of the first pipe 5 and the input cutoff outlet 3, respectively at distances x and 0.8-0.9. 0.2–0.3 of its diameter, the transverse partitions 4 are provided with a one-way perforation with openings 9 of equal diameter placed on opposite sides of the small axis of the oval of the housing 1 and lying on the extension of the axes of the perforations of the tubes 5 of the resonator, and the parameters of the swirl and tube 5 resonator made in accordance with the expression

Si "coA g,,,

where Si is the area of the passage of the guide vane swirler; n - the number of swirl blades; S9 is the area of the bore of the swirler; "2 - the number of holes swirl; and - the angle of attack of the blade swirl; h is the distance from the center of the swirl hole to the middle of the blade; L is the distance from the swirl to the upper end of the resonator tube; K is the vertical flow correction factor, is chosen to be in the range of 3.0-3.5.

Silencer spark arrestor works as follows.

The exhaust gases through the inlet pipe 2 and the tapered nozzle 6 are supplied to the first perforated tube 5 from the pipe 2 of the resonator. Part of the flow of exhaust gases, the passage through the holes 8 of the swirler 7, splits into separate streams, obtaining a vertical upward direction, while connecting to the part of the gas flow passing through the guide blades of the swirl 7 and receiving a turning

sweeping motion, vertically upward flow receives a correction in the direction of motion. Further, the flow falls on the upper edge of the end section of the resonator tube 5 and, reflecting from it, provides intensive mixing with a corresponding loss of speed, thereby reducing the noise level. At the same time, when the gas stream is reflected from the upper edge of the cut off of the resonator tube 5, unburned particles (sparks), having received the direction of the gas flow, are removed from the zone of the resonator tube 5 and are extinguished on the housing. The rest of the exhaust gas, passing through the perforations of the resonator tube 5, fills the volume bounded by the transverse partition 4 and the first transverse partition 4 from the inlet 2. Perforation of the transverse partitions 4 plays the role of a diffusor, splitting the gas flow into separate vertical ascending streams, which intersect with the streams emanating from the perforation holes of the resonator tube 5, since the holes 9 are located on the extension of the axes of the perforation holes of the resonator tube 5. The sound waves of the parts of the streams at the site of their connection are in different phases, which leads to their mutual absorption, noise reduction in a wide frequency range. Similar processes occur when the gas flow passes through the second pipe 5 from the inlet pipe 2 of the resonator. Moreover, in the event that unburned particles enter the perforations 9 of the first transverse partition 4 from the inlet nozzle 2, they, the sunrise, will be hit and the gas will fall on the non-perforated part of the second

- transverse partition 4. The presence of holes S in the partition of the swirler 7 reduces the total aerodynamic resistance of the silencer - spark arrestor.

Claims (1)

Invention Formula Spark-damping silencer “-Pz” is predominantly an internal combustion engine, comprising an oval-shaped body with inlet and outlet pipes, a coaxial perforated resonator with swirlers installed in the housing using transverse partitions, and a conical nozzle that mates a larger base with the resonator, a smaller base with an inlet, the swirlers being made in the form of partitions with guides 0 blades, characterized in that, in order to increase efficiency, the resonator is made in the form of two common tubes, the ends of the second from the inlet pipe of the resonator pipe are removed from the adjacent end of the first pipe and the inlet section of the outlet pipe 5, respectively, at a distance of 0.8-0.9 and 0.2-0.3 of its diameter, the transverse partitions are provided with a one-sided perforation with holes of equal diameter, placed on opposite sides of the small axis of the body oval and perforation holes of the resonator tubes lying on the axis, in the central part of the swirl partitions, holes are made, and the parameters of the swirlers and the resonator tubes are made in accordance with the expression S -h -cosa 4 g 1 where51 is the area of the passage of the guide vane swirler; P - the number of swirl blades; Sg is the area of the bore of the swirler; P2 - the number of holes swirl; and - the angle of attack of the blade swirl; h is the distance from the center of the swirl hole to the middle of the blade; L is the distance from the swirl to the upper end of the resonator tube; k is the vertical flow correction factor, is chosen to be in the range 3.0-3.5. . 2