CN220539719U

CN220539719U - Engine silencer

Info

Publication number: CN220539719U
Application number: CN202322236879.7U
Authority: CN
Inventors: 杨贵慈; 王华盛; 郝亮亮; 贾世龙
Original assignee: Henan Puge Aviation Model Technology Co ltd
Current assignee: Henan Puge Aviation Model Technology Co ltd
Priority date: 2023-08-19
Filing date: 2023-08-19
Publication date: 2024-02-27
Anticipated expiration: 2033-08-19

Abstract

The utility model relates to the technical field of engine silencing and discloses an engine silencer, which comprises a silencer body, wherein an upper cover body is arranged on the rear surface of the silencer body, two mounting air inlets are fixedly connected to the front surface of the silencer body, an opening for mounting the air inlets is communicated with the inside of the silencer body, air inlets are fixedly connected to the inner wall of the silencer body at positions corresponding to the two mounting air inlets, and a cavity separating plate is arranged at the upper end of the air inlet.

Description

Engine silencer

Technical Field

The utility model relates to the technical field of engine silencing, in particular to an engine silencer.

Background

Exhaust sound waves of different frequencies are mixed with exhaust gas generated during the operation of the engine, and the exhaust sound waves generally have a great influence on the surrounding environment.

In the use process of the reconnaissance aircraft, if the noise of the engine is too large, the reconnaissance aircraft can be found by the other party because of the noise, and the silencer is arranged on the exhaust pipe of the engine, so that the exhaust sound wave generated in the operation of the engine can be reduced, and the influence of the exhaust noise on the surrounding environment is reduced.

The traditional engine silencer is mostly in the shape of a long straight cylinder, is heavy in weight, occupies a relatively large space, and is not beneficial to the gravity center layout on an airplane.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model provides the engine silencer which has the advantages of small volume, light weight, compact structure and the like, and solves the problem of space waste caused by excessively long silencer volume when the traditional engine silencer is used.

In order to achieve the purposes of small volume, light weight and compact structure, the utility model provides the following technical scheme: the engine silencer comprises a silencer body, wherein an upper cover body is arranged on the rear surface of the silencer body, two mounting air inlets are fixedly connected to the front surface of the silencer body, and an opening of each mounting air inlet is communicated with the inside of the silencer body;

the muffler comprises a muffler body, wherein the inner wall of the muffler body is fixedly connected with air inlet pipes at positions corresponding to two mounting air inlets, a cavity separating plate is arranged at the upper end of each air inlet pipe, and air inlet elbows are arranged at positions corresponding to the two air inlet pipes on the cavity separating plate;

wherein, the both sides of the elbow that admits air all fixedly connected with circular arc board, the cavity between two elbows that admits air has formed the third cavity, and the cavity between cavity separator plate and the upper cover body has formed first cavity, has formed the second cavity between cavity separator plate and the muffler body.

Preferably, the outer surface of the cavity separating plate is provided with a plurality of silencing holes, the silencing holes are communicated with the first cavity and the second cavity, the center position in the second cavity is provided with a separation baffle, and the separation baffle separates the second cavity into two parts.

Preferably, the center of the cavity separating plate is provided with two air inlets which are respectively positioned at two sides of the isolation baffle, the two air inlets are communicated with the third cavity and the second cavity, the rear surface of the upper cover body is fixedly connected with an air outlet, and the air outlet is communicated with the third cavity.

Preferably, the front surface of the installation air inlet is fixedly provided with an engine, the front surface of the silencer body is provided with a sealing groove, and the sealing groove and the inside are provided with sealing strips.

Preferably, the outer surface of the opening of the silencer body is fixedly connected with a plurality of fixing seats, and the outer surface of the upper cover body is fixedly connected with the same fixing seats.

Compared with the prior art, the utility model provides the engine silencer, which has the following beneficial effects:

this engine muffler, through the silencer body and the upper cover body overall structure compactness that set up, can make from the exhaust air current of engine can obtain the speed reduction and the amortization of longer distance in the silencer body, compare in the silencer of traditional straight barrel formula, the volume is littleer, and weight is lighter, when having avoided using traditional engine muffler, the waste in space that the too big brings of silencer volume overlength.

This engine muffler is fixed through being connected two blast pipes on two installation air inlets and the engine, when the engine starts, in the tail gas gets into the intake pipe from the installation air inlet respectively, the tail gas that gets into in the intake pipe can be from the exit of inlet elbow into first cavity, the tail gas that gets into first cavity dashes to the surface of circular arc board, thereby the effect that thereby the amortization hole on the cavity separator plate can produce an energy-absorbing and decelerating to the tail gas makes engine exhaust noise can obtain the reduction of certain degree, through setting up above structure, can make the tail gas that gets into this internal tail gas of muffler can obtain effectual speed reduction and energy-absorbing, engine exhaust noise has been greatly reduced.

This engine muffler can receive the reason of circular arc board cambered surface through towards the tail gas of circular arc board and thereby slow down and turn around, in entering into the second cavity from the amortization hole again, the amortization hole that gets into in the second cavity can flow in the second cavity, finally get into the third cavity from two inlet ports and mix, finally discharge from the gas outlet, can make two strands of tail gas that get into the installation air inlet by the baffle that sets up to be slowed down the energy-absorbing respectively, avoided two strands of tail gas to interfere with each other and bring invalid amortization in this internal mutual interference of muffler.

Drawings

FIG. 1 is a schematic top view of the overall structure of the present utility model;

FIG. 2 is a schematic side view of the muffler body of the present utility model;

FIG. 3 is a schematic cross-sectional side view of the muffler body and upper cover of the present utility model;

fig. 4 is a schematic view showing the internal side view of the muffler body of the present utility model.

In the figure: 1. a muffler body; 2. an upper cover; 3. installing an air inlet; 4. an air inlet pipe; 5. an air inlet elbow; 6. a first cavity; 7. a sound deadening hole; 8. a second cavity; 9. an isolation baffle; 10. an air inlet hole; 11. a third cavity; 12. an air outlet; 13. a cavity separation plate; 14. a fixing seat; 15. sealing grooves; 16. an arc plate; 17. an engine.

Detailed Description

The technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, but not all embodiments, and all other embodiments obtained by those skilled in the art without making creative efforts based on the embodiments of the present utility model are included in the protection scope of the present utility model.

Referring to fig. 1-4, the present utility model provides a new technical solution: an engine silencer comprises a silencer body 1, an upper cover body 2 is arranged on the rear surface of the silencer body 1, two mounting air inlets 3 are fixedly connected to the front surface of the silencer body 1, openings of the mounting air inlets 3 are communicated with the inside of the silencer body 1, air inlet pipes 4 are fixedly connected to positions corresponding to the two mounting air inlets 3 on the inner wall of the silencer body 1, a cavity separating plate 13 is arranged at the upper end of each air inlet pipe 4, air inlet elbows 5 are arranged at positions corresponding to the two air inlet pipes 4 on the cavity separating plate 13, arc plates 16 are fixedly connected to two sides of each air inlet elbow 5, a third cavity 11 is formed by a cavity between each air inlet elbow 5, a first cavity 6 is formed by the cavity separating plate 13 and the upper cover body 2, a second cavity 8 is formed between the cavity separating plate 13 and the silencer body 1, the outer surface of the cavity separating plate 13 is provided with a plurality of silencing holes 7, the silencing holes 7 are communicated with the first cavity 6 and the second cavity 8, the center position in the second cavity 8 is provided with a separation baffle 9, the separation baffle 9 separates the second cavity 8 into two parts, the center position of the cavity separating plate 13 is provided with two air inlets 10, the two air inlets 10 are respectively positioned at two sides of the separation baffle 9, the two air inlets 10 are communicated with the third cavity 11 and the second cavity 8, the rear surface of the upper cover body 2 is fixedly connected with an air outlet 12, the air outlet 12 is communicated with the third cavity 11, the front surface provided with an engine 17, the front surface of the silencer body 1 is provided with a sealing groove 15, the sealing groove 15 is internally provided with a sealing strip, the outer surface of the opening of the silencer body 1 is fixedly connected with a plurality of fixing seats 14, the outer surface of the upper cover body 2 is fixedly connected with the same fixing seats 14, when the engine is started, tail gas enters the air inlet pipe 4 from the mounting air inlet 3, the tail gas entering the air inlet pipe 4 enters the first cavity 6 from the outlet of the air inlet elbow 5, the tail gas entering the first cavity 6 is rushed to the surface of the circular arc plate 16, the noise reducing holes 7 on the cavity separating plate 13 absorb and reduce the noise of the engine exhaust to a certain extent when the tail gas rushes to the circular arc plate 16, the noise of the engine exhaust can be reduced to a certain extent by arranging the structure, the tail gas entering the silencer body 1 can be effectively reduced and absorbed, the noise of the engine exhaust is greatly reduced, and the tail gas rushing to the circular arc plate 16 is simultaneously reduced and turned around due to the cambered surface of the circular arc plate 16, the muffler hole 7 entering the second cavity 8 from the muffler hole 7 again, the muffler hole 7 entering the second cavity 8 can flow in the second cavity 8, finally, the muffler hole 7 enters the third cavity 11 from the two air inlets 10 for mixing, finally, the exhaust gas is discharged from the air outlet 12, two exhaust gases entering the installation air inlet 3 can be respectively decelerated and absorbed by energy through the arranged isolation baffle 9, invalid noise reduction caused by mutual interference of the two exhaust gases in the muffler body 1 is avoided, the whole structure of the muffler body 1 and the upper cover body 2 is compact, the airflow discharged from the engine can be reduced and reduced for a longer distance in the muffler body 1, and compared with the traditional straight barrel type muffler, the volume is smaller, the weight is lighter, and the waste of space caused by overlong and overlarge muffler volume when the traditional engine muffler is used is avoided.

Working principle: when the engine is started, tail gas enters the air inlet pipe 4 from the mounting air inlet 3, the tail gas entering the air inlet pipe 4 enters the first cavity 6 from the outlet of the air inlet elbow 5, the tail gas entering the first cavity 6 is flushed to the surface of the circular arc plate 16, the noise reducing holes 7 on the cavity separating plate 13 absorb energy and reduce the noise of the engine to a certain extent when the tail gas is flushed to the circular arc plate 16, the tail gas flushed to the circular arc plate 16 is decelerated and turned around due to the cambered surface of the circular arc plate 16, the tail gas enters the second cavity 8 from the noise reducing holes 7 again, the noise reducing holes 7 entering the second cavity 8 flow in the second cavity 8, finally enter the third cavity 11 from the two air inlet holes 10 to be mixed, and finally the tail gas is discharged from the air outlet 12.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. An engine muffler comprising a muffler body (1), characterized in that: the silencer comprises a silencer body (1), wherein an upper cover body (2) is arranged on the rear surface of the silencer body (1), two mounting air inlets (3) are fixedly connected to the front surface of the silencer body (1), and openings of the mounting air inlets (3) are communicated with the inside of the silencer body (1);

the muffler comprises a muffler body (1), wherein air inlet pipes (4) are fixedly connected to the inner wall of the muffler body (1) at positions corresponding to two mounting air inlets (3), a cavity separating plate (13) is arranged at the upper end of each air inlet pipe (4), and air inlet elbows (5) are arranged at the positions, corresponding to the two air inlet pipes (4), of each cavity separating plate (13);

wherein, the both sides of the elbow that admits air (5) are all fixedly connected with circular arc board (16), and the cavity between two elbows that admits air (5) has formed third cavity (11), and cavity between cavity separation board (13) and upper cover body (2) has formed first cavity (6), has formed second cavity (8) between cavity separation board (13) and muffler body (1).

2. An engine muffler as defined in claim 1, wherein: a plurality of silencing holes (7) are formed in the outer surface of the cavity separating plate (13), the silencing holes (7) are communicated with the first cavity (6) and the second cavity (8), an isolation baffle (9) is arranged in the center of the second cavity (8), and the second cavity (8) is isolated into two parts by the isolation baffle (9).

3. An engine muffler as defined in claim 1, wherein: two air inlets (10) are formed in the center of the cavity separating plate (13), the two air inlets (10) are respectively located on two sides of the isolation baffle (9), the two air inlets (10) are communicated with the third cavity (11) and the second cavity (8), an air outlet (12) is fixedly connected to the rear surface of the upper cover body (2), and the air outlet (12) is communicated with the third cavity (11).

4. An engine muffler as defined in claim 1, wherein: the front surface of the installation air inlet (3) is fixedly provided with an engine (17), the front surface of the silencer body (1) is provided with a sealing groove (15), and the sealing groove (15) and the inside are provided with sealing strips.

5. An engine muffler as defined in claim 1, wherein: the silencer is characterized in that a plurality of fixing seats (14) are fixedly connected to the outer surface of the opening of the silencer body (1), and the same fixing seats (14) are fixedly connected to the outer surface of the upper cover body (2).