CN204492940U - Engine exhaust pipeline structure - Google Patents

Abstract

The utility model discloses a kind of Engine exhaust pipeline structure, comprise the downtake pipe and second exhaust pipe that are arranged side by side, described downtake pipe is connected in sequence by the first inlet tube, the first module tubes and at least one the first pipe group, described second exhaust pipe is connected in sequence by the second inlet tube and at least one second pipe group, wherein said first inlet tube, the first module tubes and the second inlet tube correspondence is arranged, and described first pipe group and the second pipe group correspondence are arranged.Adopt above structure, carried out modular design to downtake pipe and second exhaust pipe, make it be each cylinder outlet pipe segmented setting type, advantages of simple more, outward appearance is more excellent.Each cylinder outlet pipe modular design simultaneously can reduce casting difficulty significantly, and gas exhaust piping transition is more level and smooth, increases casting qualified rate, improves assembly technology.

Description

Engine Exhaust Pipeline Structure

technical field

The utility model belongs to the technical field of engines, in particular to an engine exhaust pipeline structure.

Background technique

Exhaust gas turbocharging exhaust method is the most commonly used supercharging method for engines at present. However, due to the number of engine cylinders, ignition sequence and different applications, the exhaust gas turbocharging arrangement is often divided into constant pressure turbocharging and pulse turbocharging. pressure. At present, most marine engines are actually used in low-speed and low-load conditions for a long time, and under this condition, the exhaust energy of the engine is small, the speed of the turbocharger is low, and the acceleration response is poor, resulting in the engine under this condition. Torque is lower. However, for most marine engines, it is very necessary to increase the low-speed high torque, and the reasonable design of the exhaust system is one of the effective ways to increase the low-speed torque.

As far as pulse turbocharging is concerned, according to the firing order of each cylinder of the engine, every three cylinders share an exhaust pipe, which is then connected to the exhaust gas turbocharger. The patent number is ZL201010542038.3, and the name is an eight-cylinder diesel engine pulse supercharged exhaust pipe. The exhaust pipe disclosed by the invention patent includes an exhaust main pipe and an exhaust branch pipe. The exhaust main pipe and the exhaust branch pipe are of the same wall Tube. Patent No. ZL201320617449.3, a utility model titled a pulse-charged exhaust pipe for a marine V-type engine discloses an exhaust pipe, including a first exhaust pipe body and a second exhaust pipe body installed together, so The first exhaust pipe body includes a first exhaust pipe main pipeline, at least two first exhaust pipe branch pipelines are arranged on the first exhaust pipe main pipeline, and the second exhaust pipe body includes an integrally arranged And the second exhaust pipe main pipeline and the third exhaust pipe main pipeline that are not connected, the second exhaust pipe main pipeline is provided with at least two second exhaust pipe branch pipelines, the third exhaust pipe The main pipeline communicates with the main pipeline of the first exhaust pipe. Both of the above two patents have the disadvantages of integral casting or welding, high degree of integration of exhaust pipes, complex structure, difficult casting or welding, and high failure rate of products.

Utility model content

In order to solve the above technical problems, the utility model provides an engine exhaust pipeline structure with convenient processing, low manufacturing cost, good connection strength and long service life.

Its technical scheme is as follows:

An engine exhaust pipeline structure, comprising a first exhaust pipe (1) and a second exhaust pipe (2) arranged side by side, the main points of which are: the first exhaust pipe (1) is formed by a first inlet pipe (3), the first module pipe (4) and at least one first pipe group (5) are connected in sequence, and the second exhaust pipe (2) is formed by the second inlet pipe (6) and at least one second pipe Groups (8) are connected in sequence, wherein the first inlet pipe (3), the first module pipe (4) and the second inlet pipe (6) are set correspondingly, the first pipe group (5) and the second Pipe group (8) corresponding setting. With the above structure, the modular design of the first exhaust pipe and the second exhaust pipe is carried out, so that the exhaust pipes of each cylinder are arranged in sections, which is simpler and more reasonable, and has a better appearance. At the same time, the modular design of the exhaust pipes of each cylinder can significantly reduce the difficulty of casting, make the transition of exhaust pipes smoother, increase the pass rate of castings, and improve the assembly process.

As a preference: the first pipe group (5) is formed by sequentially connecting the first connecting pipe (9) and two first modular pipes (4), that is, the first pipe group adopts a modular design, and the connection More convenient and easy to assemble.

As a preference: the second pipe group (8) is formed by sequentially connecting two second modular pipes (10) and second connecting pipes (11), the two second modular pipes (10) are connected to the first A connecting pipe (9) is arranged correspondingly, and the second connecting pipe (11) is arranged correspondingly to the two first modular pipes (4). The second pipe group adopts a modular design, and the connection is more convenient. The second modular pipe is arranged correspondingly to the first connecting pipe, and the second connecting pipe is arranged correspondingly to the two first modular pipes, thereby making assembly easier and more reasonable.

As a preference: the first modular pipe (4) is composed of a first section pipe (41) and a first outlet pipe (42), wherein the first outlet pipe (42) is connected to the first section pipe (41) In the middle, the outlet of the first outlet pipe (42) is inclined downward, so that the connection with the cylinder can be better realized.

As a preference: the second modular pipe (10) is composed of a second section pipe (101) and a second outlet pipe (102), wherein the second outlet pipe (102) is connected to the second section pipe (101) In the middle, the outlet of the second outlet pipe (102) is inclined upwards, so that the connection with the cylinder can be better realized.

As a preference: the adjacent first inlet pipe (3), the first connecting pipe (9) and the first joint pipe (41) are all connected by bellows (7), and the adjacent second inlet The pipe (6), the second section pipe (101) and the second connecting pipe (11) are all connected by the bellows (7). With the above structure, the original exhaust pipe is prone to vibration during the working process of the engine, thus The vibration of the engine is increased, but the utility model adds metal bellows at the joints of each cylinder of the exhaust pipeline to improve the connection strength of each cylinder of the exhaust pipeline, reduce the vibration of the exhaust, and reduce the interference of vibration on the exhaust. Close, the exhaust is smooth and smooth.

Beneficial effects: the shape of the exhaust pipe is optimized to make its layout simple and reasonable, which reduces the difficulty of casting the exhaust pipe, improves its casting pass rate, increases the connection strength of the exhaust pipe, and improves the quality of the diesel engine. The exhaust effect increases the aesthetics of its appearance.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Detailed ways

Below in conjunction with embodiment and accompanying drawing, the utility model is further described.

A kind of engine exhaust pipeline structure as shown in Figure 1, comprises the first exhaust pipe 1 and the second exhaust pipe 2 that arrange side by side, and described first exhaust pipe 1 is made of first inlet pipe 3, first The modular pipe 4 is connected with at least one first pipe group 5 sequentially, and the first pipe group 5 is formed by sequentially connecting the first connecting pipe 9 and two first modular pipes 4, and the second exhaust The pipe 2 is formed by sequentially connecting a second inlet pipe 6 and at least one second pipe group 8, and the second pipe group 8 is formed by sequentially connecting two second modular pipes 10 and a second connecting pipe 11. The second modular pipe 10 is arranged correspondingly to the first connecting pipe 9, and the second connecting pipe 11 is arranged correspondingly to the two first modular pipes 4, wherein the first inlet pipe 3, the first modular pipe 4 and the second inlet pipe 6 are arranged correspondingly, and the first pipe group 5 and the second pipe group 8 are arranged correspondingly.

Please refer to Fig. 1: the first modular pipe 4 is composed of a first section pipe 41 and a first outlet pipe 42, wherein the first outlet pipe 42 is connected to the middle part of the first section pipe 41, and the first outlet pipe 42 The outlet of the pipe is inclined downward, and the second modular pipe 10 is composed of a second section pipe 101 and a second outlet pipe 102, wherein the second outlet pipe 102 is connected in the middle of the second section pipe 101, and the second outlet pipe The exit of 102 slopes upwards.

It can also be seen in Fig. 1 that the adjacent first inlet pipe 3, the first connecting pipe 9 and the first section pipe 41 are all connected by bellows 7, and the adjacent second inlet pipe 6 , the second joint pipe 101 and the second connecting pipe 11 are connected through the corrugated pipe 7 .

The above description of the disclosed embodiments enables those skilled in the art to realize or use the utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to these embodiments shown herein, but conforms to the widest scope consistent with the principles and novel features disclosed herein.

Claims (6)

1. An engine exhaust pipeline structure, comprising a first exhaust pipe (1) and a second exhaust pipe (2) arranged side by side, characterized in that: the first exhaust pipe (1) is composed of a first exhaust pipe (1) The inlet pipe (3), the first module pipe (4) and at least one first pipe group (5) are sequentially connected, and the second exhaust pipe (2) is composed of the second inlet pipe (6) and at least one first pipe group (5). Two pipe groups (8) are connected in sequence, wherein the first inlet pipe (3), the first module pipe (4) and the second inlet pipe (6) are arranged correspondingly, and the first pipe group (5) and The second tube group (8) is set correspondingly. 2. The engine exhaust pipe structure according to claim 1, characterized in that: the first pipe group (5) consists of the first connecting pipe (9) and the two first modular pipes (4) in sequence connected. 3. The engine exhaust pipe structure according to claim 2, characterized in that: the second pipe group (8) is sequentially connected by two second modular pipes (10) and second connecting pipes (11) In this way, the two second modular pipes (10) are arranged corresponding to the first connecting pipes (9), and the second connecting pipes (11) are arranged corresponding to the two first modular pipes (4). 4. The engine exhaust pipe structure according to claim 3, characterized in that: the first modular pipe (4) is composed of a first section pipe (41) and a first outlet pipe (42), wherein the first An outlet pipe (42) is connected to the middle part of the first section pipe (41), and the outlet of the first outlet pipe (42) is inclined downward. 5. The engine exhaust pipe structure according to claim 3, characterized in that: the second modular pipe (10) is composed of a second section pipe (101) and a second outlet pipe (102), wherein the second An outlet pipe (102) is connected to the middle of the second section pipe (101), and the outlet of the second outlet pipe (102) is inclined upward. 6. The engine exhaust pipe structure according to claims 4 and 5, characterized in that: the adjacent first inlet pipe (3), first connecting pipe (9) and first joint pipe (41) They are all connected by bellows (7), and the adjacent second inlet pipe (6), second section pipe (101) and second connecting pipe (11) are all connected by bellows (7).