CN219809057U - Muffler for general gasoline engine - Google Patents

Abstract

The utility model discloses a general gasoline engine muffler, which comprises a left shell with a tail gas inlet and a right shell with an exhaust port, wherein a cavity III formed by a left partition plate and a right partition plate in the middle divides the cavity formed by the left shell and the right shell into a cavity I and a cavity II, the right partition plate and the right shell are provided with the exhaust port, an exhaust pipe is inserted into the cavity II, one end of the exhaust pipe is connected with the right partition plate, the other end of the exhaust pipe is connected with the right shell, the cavity III is communicated with the outside, and vent holes are formed in the left partition plate and the right partition plate to communicate the cavity I, the cavity II and the cavity III. The beneficial effects are that: the utility model has the advantages of exquisite design, low cost, high reliability, good noise reduction effect by utilizing the reflection and interference effects of the sound waves and prolonging the noise elimination path.

Description

Muffler for general gasoline engine

Technical Field

The utility model relates to the technical field of gasoline engines, in particular to a general gasoline engine muffler.

Background

Exhaust noise is a main noise source of the general gasoline engine, and the muffler is an important component of the gasoline engine and plays a role in reducing noise. The main composition structure of the muffler used for the current general gasoline engine comprises a muffler shell and a baffle plate, and the purpose of muffling is achieved through friction and damping effects of the baffle plate on sound waves. The muffler has the defects of complex structure, large volume, high cost and the like.

Disclosure of Invention

In order to overcome the problems, the utility model aims to provide a general purpose petrol engine muffler, which has the advantages that: the utility model has compact structure and good noise elimination effect.

The utility model realizes the above purpose through the following technical scheme:

a general gasoline engine muffler comprises a left shell, a left partition plate, a right partition plate, an exhaust pipe and a right shell; the method is characterized in that: the novel exhaust pipe is characterized in that an air inlet is formed in the left shell, a convex cavity is formed in the left partition, a convex cavity is formed in the right partition, an air outlet I is formed in the right partition, an air outlet II is formed in the right shell, a cavity I is formed between the left shell and the left partition, a cavity II is formed between the right partition and the right shell, a cavity III is formed by the left partition and the right partition, an exhaust pipe is inserted into the cavity II, one end of the exhaust pipe is connected with the air outlet I, the other end of the exhaust pipe is connected with the air outlet II, an air vent I which is communicated with the cavity I and the cavity II is formed in the left partition, an air vent II which is communicated with the cavity I and the cavity II is formed in the right partition, and an air vent III which is communicated with the cavity II and the cavity III is formed in the right partition.

So set up, gasoline engine tail gas gets into the silencer through the air inlet, then loops through cavity I, cavity II, cavity III, finally discharges through the blast pipe.

As a preferred embodiment of the present utility model, the chamber iii is disposed between the chamber i and the chamber ii, and the chamber iii is in communication with the outside through an exhaust pipe.

So set up, realized through simple structure's blast pipe that cavity III sets up between cavity I and cavity II, utilize the airflow vibration wave in cavity I and the cavity II to reach the noise elimination effect to the interior air current interference of cavity III.

As a preferable scheme of the utility model, a baffle plate is arranged on the right baffle plate, the baffle plate faces the first vent hole, and the baffle plate is arranged in the chamber II.

So set up, the baffle stops the high-speed air current that gets into cavity II from cavity I, makes the mutual interference cancellation of multistrand air current, plays the effect to the air current speed reduction to noise reduction effect has been improved.

As a preferable scheme of the utility model, the left partition plate and the right partition plate are provided with L-shaped protruding cavities to form a cavity III, and the vent holes I arranged on the left partition plate and the vent holes III arranged on the right partition plate) are distributed at two ends.

So set up, prolonged the exhaust route of air current in the silencer in limited space, adopted microperforated structure, high-pressure air current gets into the cavity through twice accuse flow in the silencer, changes air current acoustic frequency step by step, and resistance loss is little, and the noise elimination bandwidth relies on the abrupt change of cavity cross-section simultaneously to the amortization effect has been strengthened under the circumstances of not increasing the silencer volume.

As a preferred embodiment of the present utility model, the second exhaust port is parallel to the axis of the air intake port, and the second exhaust port is opposite to the air intake port.

By the arrangement, the direction of the exhaust port of the gasoline engine cylinder is consistent with that of the exhaust port of the muffler, and the exhaust port is applied to the general gasoline engine with compact structure.

The beneficial effects of the utility model are as follows: the utility model has the advantages of ingenious structural design, low cost, high reliability and the like, widens the silencing frequency band, prolongs the silencing path, ensures good silencing effect, is simple to manufacture and install, reduces the cost and improves the compactness of the whole machine.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate and explain the utility model and together with the description serve to explain the utility model.

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a cross-sectional view of the present utility model;

FIG. 3 is a schematic view of the left separator plate structure of the present utility model;

fig. 4 is a schematic view of the right separator plate structure of the present utility model.

Description of the number in the drawings: 1. a left housing; 2. an air inlet; 3. a chamber I; 4. a left partition plate; 5. a first vent hole; 6. a right partition; 7. a second vent hole; 8. a baffle; 9. an exhaust port I; 10. an exhaust pipe; 11. a right housing; 12. a chamber II; 13. a chamber III; 14. an exhaust port II; 15. and a vent hole III.

Detailed Description

It should be noted that, the terms including, but not limited to, "upper, lower, left, right, front, rear, inner, outer", etc. may be used in the following paragraphs, where the terms refer to the directions of view shown in the drawings and are not intended to limit the scope or spirit of the present utility model or to limit the scope of the present utility model.

It should be further noted that the terms "mounted," "connected," and "connected" are to be construed broadly, unless otherwise specifically indicated and defined. For example, the connection can be fixed connection or detachable connection; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the creation of the present utility model may be understood by those skilled in the art according to specific circumstances.

The following describes the embodiments of the present utility model in further detail with reference to the accompanying drawings:

embodiment 1 as shown in fig. 1 and 2, a muffler for a general gasoline engine comprises a left casing 1 provided with an internal space and an air inlet 2 connected with an air outlet of the gasoline engine; a left partition plate 4 provided with a convex chamber; the right partition board 6 is provided with an exhaust port I9 and a protruding cavity; a right shell 11 provided with a second exhaust port 14; a chamber I3 is formed between the left shell 1 and the left partition board 4, a chamber II 12 is formed between the right partition board 6 and the right shell 11, and a chamber formed by the left partition board 4 and the right partition board 6 is a chamber III 13; the exhaust pipe 10 is inserted into the chamber II 12, one end of the exhaust pipe is connected with the first exhaust port 9 arranged on the right partition plate 6, and the other end of the exhaust pipe is connected with the second exhaust port 14 arranged on the right shell 11, so that the chamber III 13 is communicated with the outside; the left partition board 4 is provided with a first vent hole 5 for communicating the cavity I3 with the cavity II 12, the right partition board 6 is provided with a second vent hole 7 for communicating the cavity I3 with the cavity II 12, and the right partition board 6 is provided with a third vent hole 15 for communicating the cavity II 12 with the cavity III 13.

Example 2 is shown in fig. 3 and 4: a baffle plate 8 is arranged at a position, opposite to the left baffle plate 4, of the right baffle plate 6, where the vent hole I5 is arranged, and the baffle plate 8 is arranged in a chamber II 12.

Further, the left partition board 4 and the right partition board 6 are provided with L-shaped protruding cavities to form a cavity III 13, the left partition board 4 is provided with a first vent hole 5, and the right partition board 6 is provided with a third vent hole 15 which is distributed at two ends.

When the utility model is used, tail gas enters the muffler through the air inlet 2, sequentially passes through the chamber I3, the chamber II 12 and the chamber III 13, and is discharged through the exhaust pipe 10. Specifically, when the high-pressure air flow enters the chamber I3 and then enters the chamber II 12 through the first vent hole 5 on the left partition plate 4, the high-pressure air flow impacts the baffle plate 8 arranged on the right partition plate 6, and the mutual interference of multiple air flows counteracts, so that the effect of reducing the speed of the air flow is achieved, and the noise reduction effect is improved; the weakened air flow enters the chamber III 13 through the three vent holes 15 arranged on one side of the right partition plate 6 far away from the baffle plate 8, the exhaust path of the air flow in the muffler is prolonged, the micro-perforation structure is adopted, the high-pressure air flow enters the chamber through twice flow control in the muffler, the air flow acoustic frequency is changed step by step, the resistance loss is reduced, the noise elimination frequency band is widened, the air flow passes through the L-shaped chamber III 13 and is discharged through the exhaust pipe 10, and the noise elimination effect is enhanced under the condition of not increasing the volume of the muffler by means of the mutation of the cross section of the chamber.

The foregoing drawings and description represent only preferred embodiments of the present utility model and are not intended to limit the same, but rather many modifications and variations of the present utility model will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model are included in the protection scope of the present utility model.

Claims (5)

1. A muffler for a general purpose gasoline engine, the muffler comprising: a left shell (1), a left partition board (4), a right partition board (6), an exhaust pipe (10) and a right shell (11); the method is characterized in that: be provided with air inlet (2) on left casing (1), left baffle (4) have and are provided with convex cavity, right baffle (6) have convex cavity, be provided with gas vent one (9) on right baffle (6), be provided with gas vent two (14) on right casing (11), form cavity I (3) between left casing (1) and left baffle (4), form cavity II (12) between right baffle (6) and right casing (11), cavity III (13) are constituteed in cavity II (6) on left baffle (4) and right baffle (6), blast pipe (10) insert in cavity II (12), blast pipe (10) one end is connected with gas vent one (9), the blast pipe (10) other end is connected with gas vent two (14), cavity III (13) are with external intercommunication, be provided with air vent one (5) of intercommunication cavity I (3) and cavity II (12) on left baffle (4), be provided with air vent two (7) on right baffle (6) and cavity II (12), cavity II (13) are provided with on right baffle (6) and are provided with air vent three (13) on cavity II (12).

2. The general purpose petrol engine muffler according to claim 1, characterized in that: the cavity III (13) is arranged between the cavity I (3) and the cavity II (12), and the cavity III (13) penetrates into the cavity II (12) through the exhaust pipe (10) to be communicated with the outside.

3. The general purpose petrol engine muffler according to claim 1, characterized in that: the right partition plate (6) is provided with a baffle plate (8), the baffle plate (8) is opposite to the vent hole I (5) arranged on the left partition plate (4), and the baffle plate (8) is arranged in the cavity II (12).

4. A general gasoline engine muffler according to claim 1 or 3, characterized in that: the left partition plate (4) and the right partition plate (6) are provided with L-shaped protruding cavities to form a cavity III (13), and the first vent holes (5) arranged on the left partition plate (4) and the third vent holes (15) arranged on the right partition plate (6) are distributed at two ends.

5. The general gasoline engine muffler according to claim 1 or 2, characterized in that: the second exhaust port (14) is parallel to the axis opposite to the air inlet (2), and the second exhaust port (14) is opposite to the air inlet (2).