CN218760079U - Silencer assembly for air-cooled diesel engine - Google Patents

Abstract

The utility model relates to the technical field of engines, in particular to a silencer assembly for air-cooled diesel engine, which comprises an exhaust pipe and a silencer, wherein the exhaust pipe is a hollow rectangular pipe, one end of the exhaust pipe is provided with an air inlet, the end surface of the other end is sealed, the side surface of the sealed end of the exhaust pipe is provided with a plurality of through holes, the air inlet is communicated with an air outlet of the engine, the sealed end of the exhaust pipe is inserted into the silencer and is communicated with the silencer through the through holes, and the through holes are positioned in the silencer; the utility model provides a silencer assembly for air-cooled diesel engine that structural design is simple, low in production cost, and the assembly is convenient, and leakproofness, intensity and rigidity are guaranteed.

Description

Silencer assembly for air-cooled diesel engine

Technical Field

The utility model relates to the technical field of engines, in particular to air-cooled diesel engine silencer assembly.

Background

An air-cooled diesel engine is an internal combustion engine using diesel oil as fuel, and is a device for converting heat energy released by fuel combustion into electric energy or mechanical energy, and is widely applied due to small volume, light weight and high cost performance. Since the air-cooled diesel engine belongs to a medium-high speed engine and has high noise during operation, a silencer is generally arranged for noise reduction. When installed, the muffler is communicated with the exhaust port of the engine through the exhaust pipe.

At present, an exhaust pipe for communicating an engine and a silencer mostly adopts a sheet metal punch forming structure, and then an upper half body and a lower half body are welded to form a conjugant to form a semicircular exhaust channel. At the junction of silencer and blast pipe, change semicircular structure into circular cross section again, this kind of blast pipe multitube connection structure structural design is complicated, and the welding seam is too much, leads to the easy poor problem of sealing that appears after the welding, and intensity and rigidity can not obtain the assurance. In addition, the exhaust pipe connecting structure relates to various processes such as sheet metal blanking, punch forming, trimming, hemming, resistance welding, gas shielded welding and the like, and has complex manufacturing process and low assembly efficiency. The manufacturing process is complex, a large amount of labor and equipment investment are involved, and the production cost is high.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the defect and not enough that prior art exists, providing a structural design is simple, low in production cost, and the assembly is convenient, and leakproofness, intensity and rigidity are guaranteed air-cooled diesel engine silencer assembly.

Realize the utility model discloses the technical scheme of purpose is: the utility model provides a silencer assembly for forced air cooling diesel engine, includes blast pipe and silencer, the blast pipe is the cavity rectangular pipe, the air inlet has been seted up to the one end of blast pipe, and the terminal surface of the other end is sealed, a plurality of through-holes have been seted up to the side of blast pipe blind end, the air inlet communicates with the gas vent of engine, the blind end of blast pipe inserts in the silencer, and communicates through-hole and silencer, the through-hole is located the silencer.

Further, the air inlet is formed in the front side face, far away from the end portion of the silencer, of the exhaust pipe, and the side face, far away from the air inlet, of the exhaust pipe is arc-shaped.

Furthermore, the through holes are uniformly distributed on the front side and the rear side of the closed end of the exhaust pipe, and the total area of the cross section of the through holes on the exhaust pipe is larger than the area of the rectangular cross section of the exhaust pipe.

Further, the diameter of the through hole is 3-5mm.

Further, the silencer comprises a barrel body, end covers, silencing pipes and a plurality of partition plates, wherein the barrel body is of a hollow structure with openings at two ends, the end covers are respectively installed at two ends of the barrel body, the partition plates are installed in the barrel body at intervals to form a plurality of silencing chambers, adjacent silencing chambers are communicated with one another, the exhaust pipe is inserted into the silencing chamber at the rearmost end of the silencer, and the silencing pipes are communicated with the silencing chamber at the foremost end of the silencer.

Furthermore, the silencing pipe is a hollow circular pipe, one end of the silencing pipe is provided with an air outlet, the end face of the other end of the silencing pipe is closed, the closed end of the silencing pipe is inserted into the silencing chamber at the foremost end of the silencer, the side face of the closed end of the silencing pipe is uniformly provided with a plurality of silencing holes, and the silencing holes are located in the silencing chamber.

Furthermore, a plurality of channels are uniformly formed in the partition plate.

Furthermore, the exhaust pipe and the silencer are symmetrically provided with reinforcing ribs, one ends of the reinforcing ribs are connected with the middle of the exhaust pipe, and the other ends of the reinforcing ribs are connected with the outer peripheral wall of the silencer.

Further, a shield is mounted above the muffler, and a gap exists between the muffler and the shield.

Furthermore, a support frame is arranged below the silencer and supports the silencer.

After the technical scheme is adopted, the utility model discloses following positive effect has:

(1) The exhaust pipe is directly inserted into the silencer, and the exhaust pipe is designed into a hollow rectangular pipe with a closed end face, compared with the traditional multi-pipe connecting structure, the structure is simplified, and welding seams are reduced, so that the sealing property, the strength and the rigidity of the silencer are ensured, the assembly is convenient, and the production cost is reduced;

(2) The side of the exhaust pipe, which is far away from the air inlet, is designed into the arc shape, so that waste gas formed when the engine works can smoothly enter the exhaust pipe, smoothly enter the silencer and play a role in silencing;

(3) The total area of the cross section of the through hole on the middle exhaust pipe is larger than the area of the rectangular cross section of the exhaust pipe, so that the resistance noise elimination effect is formed, and the exhaust performance is improved;

(4) The utility model ensures the stability of the connection between the exhaust pipe and the muffler through the arrangement of the reinforcing ribs, and avoids the adverse effect on the welding line, thereby further improving the sealing property;

(5) The utility model discloses owing to simplified the connection structure of blast pipe, compare with traditional multitube connection structure, simplified the manufacture craft, reduced artifical and equipment input by a wide margin to manufacturing cost has been reduced by a wide margin.

Drawings

In order that the present invention may be more readily and clearly understood, the following detailed description of the present invention is given in conjunction with the accompanying drawings, in which:

fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the exhaust pipe of the present invention;

fig. 3 is a schematic view of the muffler of the present invention;

fig. 4 is a partial cross-sectional view of the muffler of the present invention;

fig. 5 is a schematic view of the muffler pipe of the present invention;

fig. 6 is a schematic view of the separator of the present invention.

In the figure: 1. an exhaust pipe; 1a, an air inlet; 1b, a through hole; 2. a muffler; 2a, a cylinder body; 2b, end covers; 2c, a muffler pipe; 2c1, an air outlet; 2c2, a sound-deadening aperture; 2d, a partition plate; 2d1, a channel; 2e, an anechoic chamber; 3. reinforcing ribs; 4. a shield; 5. a support frame; 6. and (4) a flange.

Detailed Description

As shown in fig. 1, a silencer assembly for an air-cooled diesel engine includes an exhaust pipe 1 and a silencer 2, the exhaust pipe 1 is a hollow rectangular pipe, an air inlet 1a is formed in one end of the exhaust pipe 1, the end face of the other end of the exhaust pipe is closed, a plurality of through holes 1b are formed in the side face of the closed end of the exhaust pipe 1, the air inlet 1a is communicated with an exhaust port (not shown in the figure) of the engine, the closed end of the exhaust pipe 1 is inserted into the silencer 2 and is communicated with the silencer 2 through the through holes 1b, and the through holes 1b are located in the silencer 2. With in blast pipe 1 disect insertion silencer 2, and design into a terminal surface confined cavity rectangular pipe with blast pipe 1, compare with traditional multitube connection structure, simplified the structure, reduced the welding seam to make its leakproofness, intensity and rigidity obtain guaranteeing, it is convenient to assemble, and reduced manufacturing cost. Specifically, the exhaust pipe 1 is a thin wall, and the joint of the exhaust pipe 1 and the muffler 2 is welded; the symmetry is equipped with strengthening rib 3 between blast pipe 1 and the silencer 2, and the one end of strengthening rib 3 is connected with the middle part of blast pipe 1, and the other end is connected with the periphery wall of silencer 2, and the stability of being connected between blast pipe 1 and the silencer 2 is guaranteed in setting up of strengthening rib 3, avoids the adverse effect to the butt weld to further improved the leakproofness.

As shown in fig. 1 and 2, the intake port 1a is provided on the front side of the exhaust pipe 1 away from the end of the muffler 2, and the side of the exhaust pipe 1 away from the intake port 1a is arc-shaped. The side surface of the exhaust pipe 1 departing from the air inlet 1a is designed into an arc shape, so that waste gas formed when the engine works can smoothly enter the exhaust pipe 1, smoothly enter the silencer 2, and play a role in silencing. Specifically, the side surface of the exhaust pipe 1 away from the air inlet 1a is in a circular arc shape formed by local circular arc material removing welding treatment, and the air inlet 1a of the exhaust pipe 1 is hermetically connected with an exhaust port of the engine through a flange 6.

As shown in fig. 1 and 2, the through holes 1b are uniformly distributed on the front and rear sides of the closed end of the exhaust pipe 1, and the total area of the cross sections of the through holes 1b on the exhaust pipe 1 is larger than the rectangular cross section area of the exhaust pipe 1. So design forms resistive noise elimination effect, has also promoted exhaust performance simultaneously. Specifically, the diameter of the through hole 1b is 3-5mm, so that the over-high temperature of the engine caused by the over-small through hole 1b is avoided.

As shown in fig. 3 to 6, the muffler 2 includes a cylinder 2a, end caps 2b, muffling pipes 2c and a plurality of partition plates 2d, the cylinder 2a is a hollow structure with openings at both ends, the end caps 2b are respectively installed at both ends of the cylinder 2a, the partition plates 2d are installed in the cylinder 2a at intervals to form a plurality of muffling chambers 2e, adjacent muffling chambers 2e are communicated with each other, the right end of the exhaust pipe 1 is inserted into the muffling chamber 2e at the rearmost end of the muffler 2, and the muffling pipes 2c are communicated with the muffling chamber 2e at the foremost end of the muffler 2. Specifically, the cylinder 2a and the end cover 2b are welded; the number of the partition plates 2d is two, and a plurality of channels 2d1 are formed in the partition plates 2 d; the silencing chamber 2e is divided into three parts, and the silencing chamber 2e achieves the function of multi-stage silencing.

The silencing pipe 2c is a hollow circular pipe, one end of the silencing pipe 2c is provided with the air outlet 2c1, the end face of the other end of the silencing pipe is sealed, the closed end of the silencing pipe 2c is inserted into the silencing chamber 2e at the most front end of the silencer 2, the side face of the closed end of the silencing pipe 2c is uniformly provided with a plurality of silencing holes 2c2, and the silencing holes 2c2 are located in the silencing chamber 2 e.

As shown in fig. 1, a shroud 4 is attached to the upper side of the muffler 2, and a gap is provided between the muffler 2 and the shroud 4. So set up, avoid high temperature to the influence of muffler 2 to improve the life of muffler 2. The support frame 5 is arranged below the silencer 2, and the support frame 5 supports the silencer 2 to ensure the stability of the silencer 2.

The utility model discloses owing to simplified the connection structure of blast pipe 1, compare with traditional multitube connection structure, simplified the preparation technology, reduced artifical and equipment input by a wide margin to manufacturing cost has been reduced by a wide margin.

The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the present invention, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (10)

1. The utility model provides a silencer assembly for air-cooled diesel engine, includes blast pipe (1) and silencer (2), its characterized in that: the exhaust pipe (1) is a hollow rectangular pipe, an air inlet (1 a) is formed in one end of the exhaust pipe (1), the end face of the other end of the exhaust pipe is sealed, a plurality of through holes (1 b) are formed in the side face of the closed end of the exhaust pipe (1), the air inlet (1 a) is communicated with an air outlet of an engine, the closed end of the exhaust pipe (1) is inserted into the silencer (2) and is communicated with the silencer (2) through the through holes (1 b), and the through holes (1 b) are located in the silencer (2).

2. The muffler assembly for an air-cooled diesel engine according to claim 1, wherein: the exhaust pipe is characterized in that the air inlet (1 a) is formed in the front side face, far away from the end part of the silencer (2), of the exhaust pipe (1), and the side face, far away from the air inlet (1 a), of the exhaust pipe (1) is arc-shaped.

3. The muffler assembly for an air-cooled diesel engine of claim 2, wherein: the through holes (1 b) are uniformly distributed on the front side and the rear side of the closed end of the exhaust pipe (1), and the total area of the cross section of the through holes (1 b) on the exhaust pipe (1) is larger than the area of the rectangular cross section of the exhaust pipe (1).

4. A muffler assembly for an air-cooled diesel engine according to any one of claims 1 to 3, wherein: the diameter of the through hole (1 b) is 3-5mm.

5. The muffler assembly for an air-cooled diesel engine according to claim 1, wherein: silencer (2) include barrel (2 a), end cover (2 b), muffler pipe (2 c) and a plurality of baffle (2 d), barrel (2 a) are both ends open-ended hollow structure, the both ends at barrel (2 a) are installed respectively in end cover (2 b), baffle (2 d) interval is installed in barrel (2 a) in order to form a plurality of noise elimination rooms (2 e), and communicate each other between adjacent noise elimination room (2 e), muffler (2) rearmost noise elimination room (2 e) are inserted in blast pipe (1), muffler pipe (2 c) and muffler (2) foremost noise elimination room (2 e) intercommunication.

6. The muffler assembly for an air-cooled diesel engine according to claim 5, wherein: the silencer is characterized in that the silencing pipe (2 c) is a hollow circular pipe, one end of the silencing pipe (2 c) is provided with an air outlet (2 c 1), the end face of the other end of the silencing pipe is sealed, the closed end of the silencing pipe (2 c) is inserted into a silencing chamber (2 e) at the foremost end of the silencer (2), the side face of the closed end of the silencing pipe (2 c) is uniformly provided with a plurality of silencing holes (2 c 2), and the silencing holes (2 c 2) are located in the silencing chamber (2 e).

7. The muffler assembly for an air-cooled diesel engine according to claim 6, wherein: and a plurality of channels (2 d 1) are uniformly arranged on the partition plate (2 d).

8. The muffler assembly for an air-cooled diesel engine according to claim 1, wherein: the exhaust pipe silencer is characterized in that reinforcing ribs (3) are symmetrically arranged between the exhaust pipe (1) and the silencer (2), one ends of the reinforcing ribs (3) are connected with the middle of the exhaust pipe (1), and the other ends of the reinforcing ribs are connected with the peripheral wall of the silencer (2).

9. The muffler assembly for an air-cooled diesel engine according to claim 8, wherein: a protective cover (4) is arranged above the silencer (2), and a gap exists between the silencer (2) and the protective cover (4).

10. The muffler assembly for an air-cooled diesel engine of claim 9, wherein: a support frame (5) is arranged below the silencer (2), and the silencer (2) is supported by the support frame (5).

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