CN210622890U - Low-noise silencer for gasoline engine - Google Patents

Abstract

The utility model discloses a gasoline engine low noise muffler contains intake pipe, outlet duct, goes up lid, baffle and lower lid, and the baffle setting is between last lid and lower lid, and the upper end of intake pipe passes down lid and baffle and is located between lid and the baffle, is equipped with the through-hole on the upper end of intake pipe, is equipped with the through-hole on the baffle, and a tip of outlet duct passes down the lid and fixes under on the lid, is equipped with the through-hole on a tip of outlet duct, the through-hole that the upper end of intake pipe was equipped with is rectangular hole, be equipped with a plurality of grid holes on the baffle, just be located one side of baffle through-hole, the grid hole is arranged in proper order, leaves the interval between two adjacent grid boards. The utility model discloses the low noise muffler of gasoline engine can reduce the noise by a wide margin to ensure operating personnel's physical and mental health.

Description

Low-noise silencer for gasoline engine

Technical Field

The utility model relates to a gasoline engine muffler, especially a gasoline engine low noise muffler.

Background

The gasoline engine is an engine which directly sends gasoline into the interior of a machine to be combusted so as to generate power. In order to eliminate exhaust noise generated by combustion inside a machine, a muffler is generally installed at an exhaust outlet of a gasoline engine. A muffler is known. The air inlet pipe comprises an air inlet pipe, an air outlet pipe, an upper cover body, a partition plate and a lower cover body, wherein the partition plate is arranged between the upper cover body and the lower cover body, the upper end of the air inlet pipe penetrates through the lower cover body and the partition plate and is positioned between the upper cover body and the partition plate, a through hole is formed in the upper end of the air inlet pipe, a through hole is formed in the partition plate, one end of the air outlet pipe penetrates through the lower cover body and is fixed on the lower. After being discharged from the cylinder, the waste gas firstly flows into the air inlet pipe of the silencer, then enters the space between the partition plate and the upper cover body through the through hole at the upper end part of the air inlet pipe, then enters the space between the lower cover body and the partition plate through the through hole of the partition plate, and finally enters the air inlet pipe through the through hole at one end of the air outlet pipe to be discharged. Although the flow direction of the exhaust gas is changed many times, the noise is still large. Affecting the physical and mental health of the operators.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a gasoline engine low noise muffler is provided, this gasoline engine low noise muffler can reduce the noise by a wide margin to ensure operating personnel's physical and mental health.

For solving the technical problem, the utility model relates to a gasoline engine low noise muffler contains intake pipe, outlet duct, goes up lid, baffle and lower lid, and the baffle setting is between last lid and lower lid, and the upper end of intake pipe passes down lid and baffle and is located between lid and the baffle, is equipped with the through-hole on the upper end of intake pipe, is equipped with the through-hole on the baffle, and a tip of outlet duct passes down the lid and fixes under on the lid, is equipped with the through-hole on a tip of outlet duct, the through-hole that the upper end of intake pipe was equipped with is rectangular hole, be equipped with a plurality of grid holes on the baffle, just be located one side of baffle through-hole, the grid hole is arranged in proper order, leaves the interval between two.

The quantity of the rectangular hole that intake pipe upper end was equipped with is 3 to 8, and the equipartition is on the global of intake pipe upper end, and the width 2 to 8 millimeters, the length of rectangular hole are 18 to 26 millimeters.

The number of the grid holes arranged on the partition board is 8-15, the width of each grid hole is 1-5 mm, the length of each grid hole is 15-23 mm, and the distance between every two adjacent grid holes is 3-8 mm.

In above-mentioned gasoline engine low noise muffler, because the through-hole that intake pipe upper end was equipped with is rectangular hole, is equipped with a plurality of grid holes on the baffle, because of last increase the area of ventilating, reduced the energy and the pressure of waste gas, grid hole can make waste gas wherein through reflection and collision many times and reduce, attenuate the pulsation of air pressure, reduce its energy and pressure to greatly reduced noise. Especially when the airflow passes through the grid holes, the frequency spectrum of the airflow noise can move to high frequency or ultrahigh frequency, so that the audible sound component in the frequency spectrum is greatly reduced, and the interference and damage of the noise to people are greatly reduced.

Drawings

FIG. 1 is a schematic view of the structure of the low noise silencer of the gasoline engine of the present invention;

FIG. 2 is a schematic view of the connection structure of the air inlet pipe, the lower cover body, the partition plate and the air outlet pipe;

fig. 3 is a schematic structural view of the connection of the air inlet pipe, the lower cover body and the air outlet pipe.

Detailed Description

In fig. 1-3, the utility model discloses a low noise silencer of a gasoline engine, which comprises an air inlet pipe 1, an air outlet pipe 3, an upper cover body 2, a baffle plate 9 and a lower cover body 4. The partition plate 9 is provided between the upper lid body 2 and the lower lid body 4. The upper end of the air inlet pipe 1 passes through the lower cover 4 and the partition plate 9 and is located between the upper cover 2 and the partition plate 9. The upper end of the air inlet pipe 1 is provided with a through hole, the clapboard 9 is provided with a through hole 7, one end part of the air outlet pipe 3 penetrates through the lower cover body 4 and is fixed on the lower cover body 4, and one end part of the air outlet pipe 3 is provided with a through hole 6. The through hole that intake pipe 1 upper end was equipped with is rectangular hole 5. The partition board 9 is provided with a plurality of grid holes 8 and is positioned on one side of the through holes 7 of the partition board 9, the grid holes 8 are sequentially arranged, and a space is reserved between every two adjacent grid plates 8.

In order to further obtain the noise reduction effect, the number of the strip holes 5 arranged at the upper end part of the air inlet pipe 1 is 3-8, and the strip holes 5 are uniformly distributed on the circumferential surface of the upper end part of the air inlet pipe 1, and the width of the strip holes 5 is 2-8 mm, and the length of the strip holes 5 is 18-26 mm.

In order to further achieve the noise reduction effect, the number of the grid holes 8 arranged on the partition plate 9 is 8 to 15, and the width of the grid holes 8 is 1 to 5 mm, the length of the grid holes 8 is 15 to 23 mm, and the distance between the grid holes 8 and the grid holes is 3 to 8 mm.

When the low-noise silencer of the gasoline engine works, waste gas enters from the gas inlet pipe 1, enters the space between the upper cover body 2 and the partition plate 9 through the strip-shaped holes 5, then enters the space between the lower cover body 4 and the partition plate 9 through the through holes 7 and the grid holes 8 on the partition plate 9, and finally enters the gas outlet pipe 3 through the through hole 6 on the gas outlet pipe 3 to be discharged.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above, it will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, but that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (3)

1. The utility model provides a gasoline engine low noise muffler contains intake pipe, outlet duct, goes up lid, baffle and lower lid, and the baffle setting is at last lid under and between the lid, and the upper end of intake pipe passes down lid and baffle and lies in between lid and the baffle, is equipped with the through-hole on the upper end of intake pipe, is equipped with the through-hole on the baffle, and a tip of outlet duct passes down the lid and fixes under on the lid, is equipped with through-hole, its characterized in that on a tip of outlet duct: the through-hole that intake pipe upper end was equipped with is rectangular hole, be equipped with a plurality of grid holes on the baffle, just be located one side of baffle through-hole, the grid hole is arranged in proper order, leaves the interval between two adjacent grid boards.

2. The low noise silencer of the gasoline engine according to claim 1, wherein: the quantity of the rectangular hole that intake pipe upper end was equipped with is 3 to 8, and the equipartition is on the global of intake pipe upper end, and the width 2 to 8 millimeters, the length of rectangular hole are 18 to 26 millimeters.

3. The low noise silencer of the gasoline engine according to claim 1, wherein: the number of the grid holes arranged on the partition board is 8-15, the width of each grid hole is 1-5 mm, the length of each grid hole is 15-23 mm, and the distance between every two adjacent grid holes is 3-8 mm.

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