CN213980912U - Silencer for double-cylinder engine - Google Patents

Abstract

The utility model provides a silencer for double-cylinder engine, including first barrel, first barrel both ends are all sealed, be equipped with two first baffles in the first barrel, be equipped with a plurality of first through-holes on the first baffle, first baffle separates the inner chamber of first barrel for three first cavity, three first cavity is arranged in proper order along the length direction of first barrel, be equipped with first exhaust pipe and two first intake pipes on the first barrel, first exhaust pipe's first end is located in the first cavity at first barrel middle part, first exhaust pipe's first end is sealed, first exhaust pipe's pipe wall is equipped with a plurality of second through-holes, the second through-hole is located first barrel, two first intake pipes communicate the first cavity at first barrel both ends respectively. Due to the adoption of the technical scheme, the utility model discloses simple structure, noise cancelling effect is better.

Description

Silencer for double-cylinder engine

Technical Field

The utility model belongs to the technical field of the silencer, specifically a silencer for double-cylinder engine.

Background

In order to reduce the influence of noise on the environment during the operation of the engine, a silencer needs to be installed on an exhaust pipe of the engine. Although many silencers for a double-cylinder engine exist in the market at present, the existing silencer has a complex structure and poor silencing effect.

SUMMERY OF THE UTILITY MODEL

To the technical problem that above-mentioned prior art exists, the utility model provides a silencer for double-cylinder engine.

The utility model aims at realizing through such technical scheme, it includes first barrel, first barrel both ends are all sealed, are equipped with two first baffles in the first barrel, be equipped with a plurality of first through-holes on the first baffle, first baffle separates the inner chamber of first barrel for three first cavity, and is three first cavity arranges in proper order along the length direction of first barrel, be equipped with first exhaust pipe and two first intake pipes on the first barrel, first exhaust pipe's first end is located in the first cavity at first barrel middle part, first exhaust pipe's first end is sealed, first exhaust pipe's pipe wall is equipped with a plurality of second through-holes, the second through-hole is located in first barrel, two first intake pipe communicates the first cavity at first barrel both ends respectively.

Further, the muffler also comprises a second barrel, two ends of the second barrel are sealed, a second partition plate and a third partition plate are arranged in the second barrel, the inner cavity of the muffler is divided into a second cavity, a third cavity and a fourth cavity by the second partition plate and the third partition plate, the second cavity, the third cavity and the fourth cavity are sequentially arranged along the length direction of the second barrel, a second air inlet pipe and a second air outlet pipe are arranged on the second barrel, the first end of the second air inlet pipe is communicated with the third cavity, the second end of the second air inlet pipe is fixedly connected with the second end of the first air outlet pipe, the first end of the second air outlet pipe is positioned in the second cavity, the first end of the second air outlet pipe is sealed, a plurality of third through holes are formed in the pipe wall of the second air outlet pipe, the third through holes are communicated with the second cavity, a plurality of fourth through holes are formed in the third partition plate, it is a plurality of the fourth through-hole all communicates third cavity and fourth cavity, be equipped with the connecting pipe in the second barrel, the first end of connecting pipe is located the fourth cavity, the first end of connecting pipe is sealed, be equipped with a plurality of fifth through-holes on the pipe wall of connecting pipe, the fifth through-hole is located the fourth cavity, the second end of connecting pipe communicates the second cavity after passing third baffle and second baffle in proper order.

Further, the second end of the second exhaust pipe is closed, a plurality of sixth through holes are formed in the pipe wall of the second exhaust pipe, and the sixth through holes are located outside the second cylinder body.

Further, the second end of the first exhaust pipe and the second end of the second air inlet pipe are connected through a flange.

Further, the shape and the size of the first cylinder body and the second cylinder body are the same.

Since the technical scheme is used, the beneficial effects of the utility model are that:

1. when the silencer for the double-cylinder engine is used, the two first air inlet pipes are respectively and fixedly connected to the two tail air pipes of the double-cylinder engine. Airflow and noise discharged from the two tail gas pipes respectively enter the first cavities at the two ends of the first cylinder through the two first air inlet pipes, when the airflow and the noise enter the first cavities from the first air inlet pipes, the pressure is suddenly reduced, and the airflow and the noise are expanded in the first cavities at the two ends of the first cylinder to achieve the noise elimination effect. Then, airflow and noise in the first cavities at the two ends of the first cylinder enter the first cavity in the middle of the first cylinder through the first through holes, the airflow and the noise can be dispersed when passing through the first through holes, and sound passing through the first through holes can be partially offset with each other, so that the silencing effect is further realized; when the airflow and the noise pass through the first through hole and enter the first cavity in the middle of the first cylinder, the airflow and the noise are further expanded in the first cavity in the middle of the first cylinder, and the silencing effect is further achieved. Then the air current and the noise in the middle of the first cylinder body enter the first exhaust pipe through the second through holes and are exhausted through the first exhaust pipe, when the air current and the noise pass through the second through holes, the air current and the noise can be dispersed, and the sound passing through the second through holes can be partially offset mutually, so that the silencing effect is further realized. The utility model discloses simple structure, noise cancelling effect is better.

2. The silencer also comprises a second barrel, two ends of the second barrel are sealed, a second partition plate and a third partition plate are arranged in the second barrel, the inner cavity of the silencer is divided into a second cavity, a third cavity and a fourth cavity by the second partition plate and the third partition plate, the second cavity, the third cavity and the fourth cavity are sequentially arranged along the length direction of the second barrel, a second air inlet pipe and a second air outlet pipe are arranged on the second barrel, the first end of the second air inlet pipe is communicated with the third cavity, the second end of the second air inlet pipe is fixedly connected with the second end of the first air outlet pipe, the first end of the second air outlet pipe is positioned in the second cavity, the first end of the second air outlet pipe is sealed, a plurality of third through holes are arranged on the pipe wall of the second air outlet pipe and positioned in the second cavity, a plurality of fourth through holes are arranged on the third partition plate and are communicated with the third cavity and the fourth cavity, and a connecting pipe is arranged in the second barrel, the first end of connecting pipe is located the fourth cavity, and the first end of connecting pipe is sealed, is equipped with a plurality of fifth through-holes on the pipe wall of connecting pipe, and the fifth through-hole is located the fourth cavity, and the second end of connecting pipe communicates the second cavity behind passing third baffle and the second baffle in proper order. The airflow and the noise discharged from the first exhaust pipe enter the third cavity through the second air inlet pipe, when the airflow and the noise enter the third cavity from the second air inlet pipe, the pressure is suddenly reduced, and the airflow and the noise are expanded and play a role in noise elimination. Then, the airflow and the noise in the third cavity enter the fourth cavity through the fourth through holes, the airflow and the noise can be dispersed when passing through the fourth through holes, and the sound passing through the fourth through holes can be partially offset, so that the silencing effect is further realized; when the airflow and the noise pass through the fourth through hole and enter the fourth cavity, the airflow and the noise are further expanded in the fourth cavity, and the silencing effect is further achieved. Then air current and noise in the fourth cavity get into the connecting pipe through a plurality of fifth through-holes to get into the second cavity through the connecting pipe, when air current and noise passed a plurality of fifth through-holes, air current and noise can be dispersed, and the sound that passes from a plurality of fifth through-holes can partly offset each other, further plays the noise elimination effect. The air flow and the noise entering the second cavity enter the second exhaust pipe through the third through holes and are discharged from the second exhaust pipe, when the air flow and the noise pass through the third through holes, the air flow and the noise can be dispersed, and the sound passing through the third through holes can be partially offset mutually, so that the silencing effect is further realized. The air flow and the noise can enter the third cavity, then enter the second cavity from the fourth cavity through the connecting pipe, and then are discharged from the second cavity through the exhaust pipe, so that the length of a flow passage of the air flow and the noise is increased, and the noise elimination effect can be further enhanced; the noise can be weakened for many times, further enhancing the silencing effect.

3. The second end of the second exhaust pipe is closed, a plurality of sixth through holes are formed in the pipe wall of the second exhaust pipe, and the sixth through holes are located outside the second cylinder body. Get into the air current and the noise in the second blast pipe and discharge from the second blast pipe through a plurality of sixth through-holes, when air current and noise passed a plurality of sixth through-holes, air current and noise can be dispersed, and the sound that passes from a plurality of sixth through-holes can partly offset each other, further play the noise-elimination effect, can further improve the utility model discloses a noise elimination effect.

4. And the second end of the first exhaust pipe is connected with the second end of the second air inlet pipe through a flange. First exhaust pipe and second intake pipe pass through flange joint, conveniently connect first exhaust pipe and second intake pipe, also make things convenient for first exhaust pipe and second intake pipe separation.

5. The first cylinder and the second cylinder are identical in shape and size. The volume sum that makes first barrel volume and second barrel can satisfy the discharge capacity of engine, and first barrel and second barrel have shared the volume that satisfies the required silencer of discharge capacity of engine, make the volume of first barrel and second barrel all less, make first barrel and second barrel can use the same set of less mould to make, and less mould cost of manufacture is lower, so the utility model discloses can reduce the expense of mould, can save manufacturing cost.

Drawings

FIG. 1 is a schematic diagram of a muffler for a twin cylinder engine according to the present invention;

FIG. 2 is a left side view of a muffler for a twin cylinder engine according to the present invention;

FIG. 3 is a cross-sectional view A-A of FIG. 2;

FIG. 4 is a top view of a muffler for a twin cylinder engine according to the present invention;

fig. 5 is a sectional view B-B of fig. 4.

In the figure, 1, a first cylinder; 2. a first separator; 3. a first through hole; 4. a first cavity; 5. a first exhaust pipe; 6. a first intake pipe; 7. a second through hole; 8. a second cylinder; 9. a second separator; 10. a third partition plate; 11. a second cavity; 12. a third cavity; 13. a fourth cavity; 14. a second intake pipe; 15. a second exhaust pipe; 16. a third through hole; 17. a fourth via hole; 18. a connecting pipe; 19. a fifth through hole; 20. and a sixth through hole.

Detailed Description

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand and understand, the present invention is further explained by combining with the specific drawings.

As shown in fig. 2, fig. 3, fig. 4 and fig. 5, the utility model discloses a first barrel 1, first barrel 1 both ends are all sealed, be equipped with two first baffles 2 in the first barrel 1, be equipped with a plurality of first through-holes 3 on the first baffle 2, first baffle 2 separates the inner chamber of first barrel 1 for three first cavity 4, three first cavity 4 arranges in proper order along the length direction of first barrel 1, be equipped with first exhaust pipe 5 and two first intake pipes 6 on the first barrel 1, first cavity 4 at first barrel 1 middle part is located to the first end of first exhaust pipe 5, first exhaust pipe 5's first end is sealed, first exhaust pipe 5's pipe wall is equipped with a plurality of second through-holes 7, second through-hole 7 is located first barrel 1, two first intake pipes 6 communicate the first cavity 4 at first barrel 1 both ends respectively.

When the silencer for the double-cylinder engine is used, the two first intake pipes 6 are respectively and fixedly connected to the two tail gas pipes of the double-cylinder engine. Airflow and noise discharged from the two tail gas pipes respectively enter the first cavities 4 at the two ends of the first cylinder body 1 through the two first air inlet pipes 6, when the airflow and the noise enter the first cavities 4 from the first air inlet pipes 6, the pressure is suddenly reduced, and the airflow and the noise are expanded in the first cavities 4 at the two ends of the first cylinder body 1 to achieve the silencing effect. Then, airflow and noise in the first cavities 4 at the two ends of the first cylinder 1 enter the first cavities 4 in the middle of the first cylinder 1 through the first through holes 3, and when the airflow and the noise pass through the first through holes 3, the airflow and the noise can be dispersed, and sound passing through the first through holes 3 can be partially offset with each other, so that the noise elimination effect is further realized; when the air flow and the noise pass through the first through hole 3 and enter the first cavity 4 in the middle of the first cylinder 1, the air flow and the noise are further expanded in the first cavity 4 in the middle of the first cylinder 1, and the noise elimination effect is further achieved. Then, the air flow and the noise in the middle of the first cylinder 1 enter the first exhaust pipe 5 through the second through holes 7 and are exhausted through the first exhaust pipe 5, when the air flow and the noise pass through the second through holes 7, the air flow and the noise can be dispersed, and the sound passing through the second through holes 7 can be partially offset mutually, so that the noise elimination effect is further achieved. The utility model discloses simple structure, noise cancelling effect is better.

As shown in fig. 2, 3, 4 and 5, the muffler further includes a second cylinder 8, two ends of the second cylinder 8 are closed, a second partition plate 9 and a third partition plate 10 are disposed in the second cylinder 8, the second partition plate 9 and the third partition plate 10 partition an inner cavity of the muffler into a second cavity 11, a third cavity 12 and a fourth cavity 13, the second cavity 11, the third cavity 12 and the fourth cavity 13 are sequentially arranged along a length direction of the second cylinder 8, the second cylinder 8 is provided with a second air inlet pipe 14 and a second exhaust pipe 15, a first end of the second air inlet pipe 14 is communicated with the third cavity 12, a second end of the second air inlet pipe 14 is fixedly connected with a second end of the first exhaust pipe 5, a first end of the second exhaust pipe 15 is disposed in the second cavity 11, a first end of the second exhaust pipe 15 is closed, a plurality of third through holes 16 are disposed on a pipe wall of the second exhaust pipe 15, the third through holes 16 are disposed in the second cavity 11, be equipped with a plurality of fourth through holes 17 on the third baffle 10, a plurality of fourth through holes 17 all communicate third cavity 12 and fourth cavity 13, be equipped with connecting pipe 18 in the second barrel 8, the first end of connecting pipe 18 is located fourth cavity 13, the first end of connecting pipe 18 is sealed, be equipped with a plurality of fifth through holes 19 on the pipe wall of connecting pipe 18, fifth through hole 19 is located fourth cavity 13, the second end of connecting pipe 18 communicates second cavity 11 after passing third baffle 10 and second baffle 9 in proper order. The air flow and noise discharged from the first exhaust pipe 5 enter the third chamber 12 through the second intake pipe 14, and when the air flow and noise enter the third chamber 12 from the second intake pipe 14, the pressure is suddenly reduced, and the air flow and noise are expanded and play a role in noise elimination. Then, the airflow and the noise in the third cavity 12 enter the fourth cavity 13 through the fourth through holes 17, and when the airflow and the noise pass through the fourth through holes 17, the airflow and the noise can be dispersed, and the sound passing through the fourth through holes 17 can be partially offset, so that the noise elimination effect is further realized; when the air flow and the noise enter the fourth cavity 13 through the fourth through hole 17, the air flow and the noise are further expanded in the fourth cavity 13, and the noise elimination effect is further achieved. Then the air current and the noise in the fourth cavity 13 enter the connecting pipe 18 through the plurality of fifth through holes 19 and enter the second cavity 11 through the connecting pipe 18, when the air current and the noise pass through the plurality of fifth through holes 19, the air current and the noise can be dispersed, and the sound passing through the plurality of fifth through holes 19 can be partially offset with each other, thereby further playing a role of noise elimination. The air flow and the noise entering the second cavity 11 enter the second exhaust pipe 15 through the third through holes 16 and are exhausted from the second exhaust pipe 15, when the air flow and the noise pass through the third through holes 16, the air flow and the noise can be dispersed, and the sound passing through the third through holes 16 can be partially offset with each other, so that the noise elimination effect is further achieved. The air flow and the noise can enter the third cavity 12, then enter the second cavity 11 from the fourth cavity 13 through the connecting pipe 18, and then are discharged from the second cavity 11 through the exhaust pipe, so that the length of the air flow and the noise flow channel is increased, and the noise elimination effect can be further enhanced; the noise can be weakened for many times, further enhancing the silencing effect.

As shown in fig. 1, the second end of the second exhaust pipe 15 is closed, a plurality of sixth through holes 20 are formed in the pipe wall of the second exhaust pipe 15, and the sixth through holes 20 are located outside the second cylinder 8. Get into air current and noise in the second blast pipe 15 and discharge from second blast pipe 15 through a plurality of sixth through-holes 20, when air current and noise passed a plurality of sixth through-holes 20, air current and noise can be dispersed, and the sound of passing from a plurality of sixth through-holes 20 can partly offset each other, further plays noise-abatement action, can further improve the utility model discloses a noise elimination effect.

As shown in fig. 1, the second end of the first exhaust pipe 5 and the second end of the second intake pipe 14 are connected by flanges. First exhaust pipe 5 and second intake pipe 14 pass through flange joint, conveniently connect first exhaust pipe 5 and second intake pipe 14, also conveniently separate first exhaust pipe 5 and second intake pipe 14.

As shown in fig. 1, the first cylinder 1 and the second cylinder 8 are identical in shape and size. Make the volume sum of first barrel 1 volume and second barrel 8 can satisfy the discharge capacity of engine, first barrel 1 and second barrel 8 have shared the volume that satisfies the required silencer of discharge capacity of engine, make first barrel 1 and second barrel 8's volume all less, make first barrel 1 and second barrel 8 can use the same set of less mould to make, and less mould cost of manufacture is lower, so the utility model discloses can reduce the expense of mould, can save manufacturing cost.

The above is only the embodiment of the present invention, not the limitation of the patent scope of the present invention, all the equivalent structures made by the contents of the specification and the drawings are directly or indirectly applied to other related technical fields, all the same principle is within the patent protection scope of the present invention.

Claims (5)

1. A muffler for a twin cylinder engine, characterized by: including first barrel, first barrel both ends are all sealed, are equipped with two first baffles in the first barrel, be equipped with a plurality of first through-holes on the first baffle, first baffle separates the inner chamber of first barrel for three first cavity, and is three first cavity arranges in proper order along the length direction of first barrel, be equipped with first trachea and two first intake pipes on the first barrel, first trachea's first end is located in the first cavity at first barrel middle part, first trachea's first end is sealed, first trachea's pipe wall is equipped with a plurality of second through-holes, the second through-hole is located in the first barrel, two first intake pipe communicates the first cavity at first barrel both ends respectively.

2. A muffler for a twin cylinder engine as defined in claim 1, wherein: the silencer also comprises a second barrel, the two ends of the second barrel are sealed, a second partition plate and a third partition plate are arranged in the second barrel, the inner cavity of the silencer is divided into a second cavity, a third cavity and a fourth cavity by the second partition plate and the third partition plate, the second cavity, the third cavity and the fourth cavity are sequentially arranged along the length direction of the second barrel, a second air inlet pipe and a second exhaust pipe are arranged on the second barrel, the first end of the second air inlet pipe is communicated with the third cavity, the second end of the second air inlet pipe is fixedly connected with the second end of the first exhaust pipe, the first end of the second exhaust pipe is positioned in the second cavity, the first end of the second exhaust pipe is sealed, a plurality of third through holes are formed in the second exhaust pipe, the third through holes are formed in the second cavity, a plurality of fourth through holes are formed in the third partition plate, it is a plurality of the fourth through-hole all communicates third cavity and fourth cavity, be equipped with the connecting pipe in the second barrel, the first end of connecting pipe is located the fourth cavity, the first end of connecting pipe is sealed, be equipped with a plurality of fifth through-holes on the pipe wall of connecting pipe, the fifth through-hole is located the fourth cavity, the second end of connecting pipe communicates the second cavity after passing third baffle and second baffle in proper order.

3. A muffler for a twin cylinder engine as defined in claim 2, wherein: the second end of the second exhaust pipe is closed, a plurality of sixth through holes are formed in the pipe wall of the second exhaust pipe, and the sixth through holes are located outside the second cylinder body.

4. A muffler for a twin cylinder engine as defined in claim 2, wherein: and the second end of the first exhaust pipe is connected with the second end of the second air inlet pipe through a flange.

5. A muffler for a twin cylinder engine as defined in claim 2, wherein: the first cylinder and the second cylinder are identical in shape and size.

Images