CN211230581U

CN211230581U - Flow adjustable silencer

Info

Publication number: CN211230581U
Application number: CN201922040710.8U
Authority: CN
Inventors: 梅东兴; 梅冬生; 季振林; 肖友洪; 严桂芳
Original assignee: Jiangsu Yean Industry Environmental Protection Equipment Technology Co ltd
Current assignee: Jiangsu Yean Industry Environmental Protection Equipment Technology Co ltd
Priority date: 2019-11-23
Filing date: 2019-11-23
Publication date: 2020-08-11
Anticipated expiration: 2029-11-23

Abstract

The utility model discloses an adjustable silencer of through flow, including the silencer barrel, at the both ends difference fixedly connected with barrel left end plate and barrel right side end plate of silencer barrel, be provided with intake pipe and outlet duct on the section of thick bamboo wall of silencer barrel, the section of thick bamboo intracavity of silencer barrel is fixed and is provided with section of thick bamboo chamber baffle, and left inflation chamber and right inflation chamber are separated into with the silencer barrel to this section of thick bamboo chamber baffle, installs the perforated pipe on the section of thick bamboo chamber baffle, and the left section of this perforated pipe is located left inflation intracavity, and the right section of perforated pipe is located right inflation intracavity, slides in the right section intracavity of perforated pipe and is provided with the regulation and control smooth cup that is cup-shaped structure, and the rim of a cup of regulation and control smooth cup is towards left inflation chamber, and fixed mounting is in the regulation and control pole sliding bearing of regulating and controlling smooth cup bottom of cup on. The muffler with the adjustable through flow can adjust the through flow of the exhaust flow area according to the rotating speed and the exhaust pressure of an engine, and has the advantages of reasonable structure and convenience in adjustment.

Description

Flow adjustable silencer

Technical Field

The utility model relates to a silencer especially relates to silencer of engine exhaust noise.

Background

The internal combustion engine is the most widely used power machine, is the main power source of equipment such as vehicles, ships and engineering machinery, and is also an important sound source of noise pollution, wherein the exhaust noise is the most serious, the simplest and most effective method for controlling the exhaust noise is to adopt a silencer, and the silencer evaluation indexes mainly include the following three items: acoustic, aerodynamic and structural properties. The acoustic performance of the muffler requires a sufficiently high amount of sound attenuation within the required range of sound attenuation frequencies; aerodynamic performance requires that the silencer has resistance requirements and pressure loss on airflow within practically allowable ranges, and if the silencer has poor aerodynamic performance and the resistance of an exhaust system is very large, the fuel consumption of the internal combustion engine is increased and the output power is reduced.

The running speed and the exhaust gas volume of the engine are not always stable, but change along with different working conditions. When the engine is in a low-speed running or deceleration state, the airflow in the exhaust pipeline is very small and the flow speed is low, the influence on the power performance of the engine is small, fundamental frequency noise which contributes greatly to the exhaust noise of the engine is very low, and the noise elimination range of the silencer is mainly in a low-frequency area due to the very low corresponding frequency; when the engine is in a high-speed operation or speed-up state, the amount of exhaust gas in the exhaust pipe increases and the flow velocity increases, so that the aerodynamic performance of the muffler becomes a major consideration. However, the existing mufflers all adopt a fixed structural form, the internal structure of the muffler is fixed in the using process, and the requirements of different types and different working states of the engine on the muffling frequency and the exhaust flow rate cannot be met.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that the above-mentioned not enough that exists to prior art provides one kind and can adjust the adjustable silencer of through flow of exhaust flow area according to engine speed and exhaust pressure size.

In order to solve the technical problem, the utility model discloses an adjustable silencer of through flow, including the silencer barrel, at the both ends difference fixedly connected with barrel left end board and the barrel right end board of silencer barrel, be provided with intake pipe and outlet duct on the section of thick bamboo wall of silencer barrel, the section of thick bamboo intracavity of silencer barrel is fixed and is provided with a chamber baffle, and this chamber baffle separates into left inflation chamber and right inflation chamber with the silencer barrel, installs the perforated pipe on a chamber baffle, and the left section of this perforated pipe is located left inflation intracavity, and the right section of perforated pipe is located right inflation intracavity, slides in the right section intracavity of perforated pipe and is provided with the regulation and control slide cup that is cup-shaped structure, and the rim of a cup of regulation and control slide cup is towards left inflation chamber, and fixed mounting is in the regulation and control slide cup bottom of cup regulation and control slide the pole sliding support on barrel right end board and extend the.

Furthermore, the central lines of the air inlet pipe and the air outlet pipe are perpendicular to the central line of the perforated pipe.

Further, the air inlet pipe is communicated with the left expansion cavity, and the air outlet pipe is communicated with the right expansion cavity.

Further, the perforation rate of the perforated pipe is 25% -30%, and the perforation aperture of the perforated pipe is 6 mm-8 mm.

Furthermore, the adjusting and controlling rod is supported on the right end plate of the cylinder body in a sliding mode through an adjusting and controlling rod sliding support, and a handle is arranged at the extending end of the adjusting and controlling rod.

In the structure, owing to install the smooth cup of regulation and control that is cup-shaped structure that slides in the perforated pipe right side section lumen on section of thick bamboo chamber baffle, and the rim of a cup of the smooth cup of regulation and control expands the chamber towards left, when the smooth cup of regulation and control slides from left to right, the perforation area grow of the perforated pipe right side section that the smooth cup of regulation and control sheltered from, the corresponding grow of exhaust flow, and when the smooth cup of regulation and control slides from right side left side, the perforation area that the smooth cup of regulation and control sheltered from the perforated pipe right side section diminishes, the exhaust flow correspondingly diminishes, can adjust the flow area of silencer according to the rotational speed and the displacement size of engine like this, and then adapt to the noise elimination requirement of. The cylinder body of the silencer is divided into a left expansion cavity and a right expansion cavity by a cylinder cavity partition plate, a perforated pipe is arranged on the cylinder cavity partition plate, airflow enters an expansion chamber through the perforated pipe to form an air inlet flow passage and an air outlet flow passage which expand and suddenly contract, and sound waves suddenly change in the cross section of the expansion and contraction pipeline to cause sudden change of acoustic impedance in the passage, so that the propagation direction of the sound waves is changed, and reflection and interference occur in the pipeline, thereby effectively realizing the silencing of medium and low frequency noise.

Drawings

The flow-adjustable muffler of the present invention will be further described with reference to the accompanying drawings and the following detailed description.

Fig. 1 is a schematic main sectional structure view of one embodiment of the muffler with adjustable through flow of the present invention.

In the figure, 1-silencer cylinder, 2-cylinder cavity partition board, 3-perforated pipe, 4-cylinder left end board, 5-air inlet pipe, 6-left expansion cavity, 7-regulation slide cup, 8-right expansion cavity, 9-regulation rod, 10-cylinder right end board, 11-regulation rod sliding support and 12-air outlet pipe.

Detailed Description

The muffler with the adjustable through flow as shown in fig. 1 comprises a muffler cylinder 1, wherein the muffler cylinder 1 is a cylindrical cylinder made of steel plates in a rolling mode, a cylinder left end plate 4 and a cylinder right end plate 10 are fixedly connected to two ends of the muffler cylinder 1 respectively, and a muffler cavity is defined by the cylinder left end plate 4, the cylinder right end plate 10 and the muffler cylinder 1. The wall of the silencer cylinder body 1 is provided with an air inlet pipe 5 and an air outlet pipe 12, and the central lines of the air inlet pipe 5 and the air outlet pipe 12 are perpendicular to the central line of the silencer cylinder body 1. The cylinder cavity internal fixation of this silencer barrel 1 is provided with a section of thick bamboo chamber baffle 2, and section of thick bamboo chamber baffle 2 separates silencer barrel 1 into left inflation chamber 6 and right inflation chamber 8, and intake pipe 5 accesss to left inflation chamber 6, and outlet duct 12 accesss to right inflation chamber 8.

The perforated pipe 3 is arranged on the cylinder cavity partition board 2, the perforation rate of the perforated pipe 3 is 25% -30%, and the perforation aperture of the perforated pipe 3 is controlled to be 6-8 mm. The left section of the perforated pipe 3 is positioned in the left expansion cavity 6, the right section of the perforated pipe 3 is positioned in the right expansion cavity 8, the regulating slide cup 7 in a cup-shaped structure is arranged in the right section cavity of the perforated pipe 3 in a sliding manner, and the regulating slide cup 7 can slide left and right along the axial lead of the inner wall of the perforated pipe 3. The opening of the regulating slide cup 7 faces the left expansion cavity 6, the bottom of the regulating slide cup 7 is positioned in the right expansion cavity 8, the bottom of the regulating slide cup 7 is fixedly connected with a regulating rod 9, the regulating rod 9 is slidably supported on a right end plate 10 of the cylinder body through a regulating rod sliding support 11, and the extending end of the regulating rod 9 is provided with a handle so as to regulate and control the relative position of the regulating slide cup 7 on the perforated pipe 3 at the outer side of the silencer cylinder body. The central line of the perforated pipe 3 is perpendicular to the central lines of the inlet pipe 5 and the outlet pipe 12.

Claims

1. The utility model provides an adjustable silencer of through flow, includes silencer barrel (1), at the both ends difference fixedly connected with barrel left end board (4) and barrel right side end board (10) of silencer barrel (1), be provided with intake pipe (5) and outlet duct (12), its characterized in that on the section of thick bamboo wall of silencer barrel (1): the cylinder chamber internal fixation of silencer barrel (1) is provided with cylinder chamber baffle (2), this cylinder chamber baffle (2) separate into left inflation chamber (6) and right inflation chamber (8) with silencer barrel (1), install perforated pipe (3) on cylinder chamber baffle (2), the left section of this perforated pipe (3) is located left inflation chamber (6), the right section of perforated pipe (3) is located right inflation chamber (8), it is provided with regulation and control slide cup (7) that are cup-shaped structure to slide in the right section intracavity of perforated pipe (3), the rim of a cup of regulation and control slide cup (7) is towards left inflation chamber (6), fixed mounting is in regulation and control pole (9) sliding support of regulation and control slide cup (7) bottom of cup on barrel right end plate (10) and extend the outside of barrel right end plate (10).

2. The variable flowrate muffler of claim 1, wherein: the central lines of the air inlet pipe (5) and the air outlet pipe (12) are both vertical to the central line of the perforated pipe (3).

3. The variable flowrate muffler according to claim 1 or 2, characterized in that: the air inlet pipe (5) is communicated with the left expansion cavity (6), and the air outlet pipe (12) is communicated with the right expansion cavity (8).

4. The variable flowrate muffler according to claim 1 or 2, characterized in that: the perforation rate of the perforated pipe (3) is 25% -30%, and the perforation aperture of the perforated pipe (3) is 6-8 mm.

5. The variable flowrate muffler according to claim 1 or 2, characterized in that: the adjusting and controlling rod (9) is slidably supported on the right end plate (10) of the cylinder body through an adjusting and controlling rod sliding support (11), and a handle is arranged at the extending end of the adjusting and controlling rod (9).