阅读说明：本技术 一种舷外机动力总成的集中排气冷却结构 (Concentrated exhaust cooling structure of outboard engine power assembly ) 是由 夏坚 徐晓虎 任韦青 于 2021-04-30 设计创作，主要内容包括：本发明公开了一种舷外机动力总成的集中排气冷却结构,包含发动机箱体、气缸头、整流器组件和排气管组件；发动机箱体和气缸头上均具有水冷结构,气缸头上设置有集中排气仓、整流器安装座和多个排气门座；排气仓中设置有冷却水路和排气腔,整流器组件安装在整流器安装座上；每个排气门座处均设置有排气道,多个排气道汇聚到排气腔中；本方案将多缸发动机的排气通道集中到该排气仓中,通过排气管组件统一排气,提高了排气效率；并且将发动机的水冷结构引入集中排气仓的结构中,可以对排气通道进行有效冷却,同时也可以对整流器进行冷却；优化设计后的排气管组件可以提高排气效果,保证发动机稳定运行。(The invention discloses a concentrated exhaust cooling structure of an outboard engine power assembly, which comprises an engine box body, a cylinder head, a rectifier component and an exhaust pipe component, wherein the engine box body is provided with a plurality of air inlet holes; the engine box body and the cylinder head are both provided with water cooling structures, and the cylinder head is provided with a centralized exhaust bin, a rectifier mounting seat and a plurality of exhaust valve seats; a cooling water channel and an exhaust cavity are arranged in the exhaust bin, and the rectifier assembly is arranged on the rectifier mounting seat; an exhaust passage is arranged at each exhaust valve seat, and a plurality of exhaust passages are gathered in the exhaust cavity; the exhaust channel of the multi-cylinder engine is concentrated in the exhaust bin, and the exhaust is unified through the exhaust pipe assembly, so that the exhaust efficiency is improved; the water cooling structure of the engine is introduced into the structure of the concentrated exhaust bin, so that the exhaust channel can be effectively cooled, and meanwhile, the rectifier can also be cooled; the exhaust pipe assembly after the optimized design can improve the exhaust effect and ensure the stable operation of the engine.)

1. The utility model provides an outboard engine power assembly's concentrated exhaust cooling structure which characterized in that: comprises an engine box body (1), a cylinder head (2), a rectifier component (3) and an exhaust pipe component; the cylinder head (2) is arranged on the engine box body (1), the engine box body (1) and the cylinder head (2) are both provided with water cooling structures, and the cylinder head (2) is provided with a centralized exhaust bin (6), a rectifier mounting seat (7) and a plurality of exhaust valve seats (8); a cooling water path (10) and an exhaust cavity (11) are arranged in the exhaust bin (6), the cooling water path (10) passes through the rectifier mounting seat (7), and the rectifier assembly (3) is mounted on the rectifier mounting seat (7); an exhaust passage (12) is arranged at each exhaust valve seat (8), and the exhaust passages (12) are converged into an exhaust cavity (11); the concentrated exhaust bin (6) is provided with an exhaust pipe connecting seat (9), the engine box body (1) is provided with an exhaust connecting structure, and two ends of the exhaust pipe assembly are respectively connected to the exhaust connecting structure of the exhaust pipe connecting seat (9) and the exhaust connecting structure of the engine box body (1).

2. The concentrated exhaust cooling structure for outboard engine power units according to claim 1, wherein: the rectifier mounting seat (7) is arranged on the exhaust bin (6), and the rectifier mounting seat (7) forms a cooling water tank communicated with the cooling water channel (10).

3. The concentrated exhaust cooling structure for outboard engine power units according to claim 1, wherein: the exhaust pipe connecting seat (9) is located in the middle of the concentrated exhaust bin (6), and a cooling water channel connecting port (13) is arranged on the exhaust pipe connecting seat (9).

4. The concentrated exhaust cooling structure for outboard engine power units according to claim 1, wherein: the exhaust pipe assembly comprises an upper exhaust pipe (4) and a lower exhaust pipe (5), cooling water channels (10) are arranged in the upper exhaust pipe (4) and the lower exhaust pipe (5), an upper flange seat (21) is arranged at the upper end of the upper exhaust pipe (4), the upper flange seat (21) is fixedly connected with an exhaust pipe connecting seat (9), a lower flange seat (26) is arranged at the lower end of the lower exhaust pipe (5), and the lower flange seat (26) is installed on an exhaust connecting structure of the engine box body (1); the lower extreme of last blast pipe (4) has first inner connecting portion (22) and first outer connecting portion (23), and the upper end of lower blast pipe (5) has second inner connecting portion (24) and second outer connecting portion (25), and first inner connecting portion (22) and second inner connecting portion (24) cooperation, first outer connecting portion (23) and second outer connecting portion (25) cooperation make upper blast pipe (4) and cooling water route (10) in lower blast pipe (5) be linked together.

5. The concentrated exhaust cooling structure for outboard engine power units according to claim 4, wherein: and the upper flange seat (21) is provided with a water return hole (31), and the water return hole (31) is communicated with a cooling water channel (10) in the upper exhaust pipe (4).

6. The concentrated exhaust cooling structure for outboard engine power units according to claim 4, wherein: and cooling water channel connecting ports (13) are arranged on the connecting end surfaces of the upper flange seat (21) and the lower flange seat (26).

7. The concentrated exhaust cooling structure for outboard engine power units according to claim 4, wherein: the connecting part of the upper exhaust pipe (4) and the lower exhaust pipe (5) is provided with a pull rod connecting block (32), the pull rod connecting block (32) is used for installing a pull rod, and the pull rod connects and fixes the upper exhaust pipe (4) and the lower exhaust pipe (5) through the pull rod connecting block (32).

8. The concentrated exhaust cooling structure for outboard engine power units according to claim 4, wherein: and a sealing ring is arranged on the matching surface of the first inner connecting part (22) and the second inner connecting part (24), and a sealing ring is arranged on the matching surface of the first outer connecting part (23) and the second outer connecting part (25).

Technical Field

The invention relates to a centralized exhaust cooling structure of an outboard engine power assembly, and belongs to the technical field of outboard engines.

Background

An exhaust structure needs to be designed on a power assembly of the outboard engine to exhaust waste gas in a cylinder, most of the existing modes are that an independent exhaust pipeline is arranged at each exhaust valve of a multi-cylinder engine, and the exhaust mode has low efficiency and is not beneficial to exhaust and heat dissipation; and the design of exhaust pipe is reasonable inadequately, influences the exhaust effect, and then can influence the job stabilization nature of outboard engine.

Disclosure of Invention

In view of the above technical problems, the present invention aims to: a concentrated exhaust cooling structure for outboard engine power assemblies is provided.

The technical solution of the invention is realized as follows: a concentrated exhaust cooling structure of an outboard engine power assembly comprises an engine box body, a cylinder head, a rectifier component and an exhaust pipe component; the cylinder head is arranged on the engine box body, the engine box body and the cylinder head are both provided with water cooling structures, and the cylinder head is provided with a centralized exhaust bin, a rectifier mounting seat and a plurality of exhaust valve seats; a cooling water path and an exhaust cavity are arranged in the exhaust bin, the cooling water path passes through the rectifier mounting seat, and the rectifier assembly is mounted on the rectifier mounting seat; an exhaust passage is arranged at each exhaust valve seat, and a plurality of exhaust passages are gathered in the exhaust cavity; the concentrated exhaust bin is provided with an exhaust pipe connecting seat, the engine box body is provided with an exhaust connecting structure, and two ends of the exhaust pipe assembly are connected to the exhaust pipe connecting seat and the exhaust connecting structure of the engine box body respectively.

Preferably, the rectifier mounting seat is arranged on the exhaust bin, and the rectifier mounting seat forms a cooling water tank communicated with the cooling water channel.

Preferably, the exhaust pipe connecting seat is positioned in the middle of the concentrated exhaust bin, and a cooling water channel connecting port is arranged on the exhaust pipe connecting seat.

Preferably, the exhaust pipe assembly comprises an upper exhaust pipe and a lower exhaust pipe, cooling water paths are arranged in the upper exhaust pipe and the lower exhaust pipe, an upper flange seat is arranged at the upper end of the upper exhaust pipe, the upper flange seat is fixedly connected with an exhaust pipe connecting seat, a lower flange seat is arranged at the lower end of the lower exhaust pipe, and the lower flange seat is arranged on an exhaust connecting structure of the engine box body; the lower end of the upper exhaust pipe is provided with a first inner connecting part and a first outer connecting part, the upper end of the lower exhaust pipe is provided with a second inner connecting part and a second outer connecting part, the first inner connecting part is matched with the second inner connecting part, and the first outer connecting part is matched with the second outer connecting part, so that the cooling water paths in the upper exhaust pipe and the lower exhaust pipe are communicated.

Preferably, the upper flange seat is provided with a water return hole, and the water return hole is communicated with a cooling water path in the upper exhaust pipe.

Preferably, the connecting end surfaces of the upper flange seat and the lower flange seat are both provided with cooling water channel connecting ports.

Preferably, the connection part of the upper exhaust pipe and the lower exhaust pipe is provided with a pull rod connection block, the pull rod connection block is used for installing a pull rod, and the pull rod connects and fixes the upper exhaust pipe and the lower exhaust pipe through the pull rod connection block.

Preferably, a sealing ring is arranged on a matching surface of the first inner connecting part and the second inner connecting part, and a sealing ring is arranged on a matching surface of the first outer connecting part and the second outer connecting part.

Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:

according to the concentrated exhaust cooling structure of the outboard engine power assembly, the structure of the concentrated exhaust bin is designed on the cylinder head, so that exhaust channels of a multi-cylinder engine can be concentrated in the exhaust bin, and exhaust is unified through the exhaust pipe assembly, so that the exhaust efficiency is improved; the water cooling structure of the engine is introduced into the structure of the concentrated exhaust bin, so that the exhaust channel can be effectively cooled, and meanwhile, the rectifier can also be cooled; the exhaust pipe assembly after the optimized design can improve the exhaust effect and ensure the stable operation of the engine.

Drawings

The technical scheme of the invention is further explained by combining the accompanying drawings as follows:

FIG. 1 is a perspective view of a concentrated exhaust cooling arrangement for an outboard engine power assembly in accordance with the present invention;

FIG. 2 is a schematic perspective view of a cylinder head according to the present invention;

FIG. 3 is a schematic perspective view of the other side of the cylinder head according to the present invention;

FIG. 4 is a schematic cross-sectional view of a cylinder head according to the present invention;

FIG. 5 is a schematic perspective view of an exhaust pipe assembly according to the present invention;

fig. 6 is a schematic cross-sectional view of an exhaust pipe assembly according to the present invention.

Detailed Description

The invention is described below with reference to the accompanying drawings.

As shown in fig. 1 to 4, the concentrated exhaust cooling structure of an outboard engine power assembly according to the present invention includes an engine case 1, a cylinder head 2, a rectifier assembly 3, and an exhaust pipe assembly; the cylinder head 2 is arranged on the engine box body 1, the engine box body 1 and the cylinder head 2 are both provided with water cooling structures, and the cylinder head 2 is provided with a centralized exhaust bin 6, a rectifier mounting seat 7 and a plurality of exhaust valve seats 8; in the embodiment, a four-cylinder structure is adopted, and 8 exhaust valves are used in total.

The exhaust bin 6 is internally provided with a cooling water channel 10 and an exhaust cavity 11, the rectifier mounting seat 7 is arranged on the exhaust bin 6, the rectifier mounting seat 7 forms a cooling water channel communicated with the cooling water channel 10, the rectifier assembly 3 is arranged on the rectifier mounting seat 7, the original air cooling mode of the rectifier assembly 3 is changed into water cooling, the engine space structure is ingeniously utilized, and the heat dissipation efficiency of the rectifier assembly 3 is improved.

Each exhaust valve seat 8 is provided with an exhaust passage 12, the exhaust passages 12 are gathered in an exhaust cavity 11, exhaust is concentrated through the exhaust cavity 11, a plurality of process holes are formed in a concentrated exhaust bin 6 and are respectively communicated with a water path or a gas path in the concentrated exhaust bin 6, the process holes are generally plugged by process plugs, and when needed, the process plugs can be taken down and corresponding sensors are mounted to detect the cylinder body.

The exhaust pipe connecting seat 9 is arranged in the middle of the concentrated exhaust bin 6, the exhaust connecting structure is arranged on the engine box body 1, the two ends of the exhaust pipe assembly are respectively connected to the exhaust connecting structure of the exhaust pipe connecting seat 9 and the exhaust connecting structure of the engine box body 1, and the exhaust pipe connecting seat 9 is provided with a cooling water path connecting port 13 for communicating a cooling water path in the exhaust pipe assembly.

As shown in fig. 5-6, the exhaust pipe assembly includes an upper exhaust pipe 4 and a lower exhaust pipe 5, wherein the upper exhaust pipe 4 and the lower exhaust pipe 5 are both provided with a cooling water channel 10, the upper end of the upper exhaust pipe 4 is provided with an upper flange seat 21, the upper flange seat 21 is provided with a water return hole 31, the water return hole 31 is communicated with the cooling water channel 10 in the upper exhaust pipe 4, and the water return hole 31 can be connected with an external cooling water observation port.

The upper flange seat 21 is fixedly connected with the exhaust pipe connecting seat 9, the lower end of the lower exhaust pipe 5 is provided with a lower flange seat 26, and the lower flange seat 26 is arranged on an exhaust connecting structure of the engine box body 1; and cooling water channel connectors 13 are arranged on the connecting end surfaces of the upper flange seat 21 and the lower flange seat 26, so that the cooling water channels 10 in the upper exhaust pipe 4 and the lower exhaust pipe 5 are communicated with the water cooling structures in the engine box body 1 and the cylinder head 2, and a complete cooling water circulation system is formed.

The lower end of the upper exhaust pipe 4 is provided with a first inner connecting part 22 and a first outer connecting part 23, the upper end of the lower exhaust pipe 5 is provided with a second inner connecting part 24 and a second outer connecting part 25, the first inner connecting part 22 is matched with the second inner connecting part 24, and the first outer connecting part 23 is matched with the second outer connecting part 25, so that the cooling water channels 10 in the upper exhaust pipe 4 and the lower exhaust pipe 5 are communicated.

The matching surfaces of the first inner connecting portion 22 and the second inner connecting portion 24 are provided with sealing rings to ensure that the water paths and the air paths are mutually sealed and separated, and the matching surfaces of the first outer connecting portion 23 and the second outer connecting portion 25 are provided with sealing rings to ensure that cooling water does not leak.

The connecting part of the upper exhaust pipe 4 and the lower exhaust pipe 5 is provided with a pull rod connecting block 32, the pull rod connecting block 32 is used for installing a pull rod, and the pull rod connects and fixes the upper exhaust pipe 4 and the lower exhaust pipe 5 through the pull rod connecting block 32.

The above-mentioned embodiments are merely illustrative of the technical idea and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the scope of the present invention, and all equivalent changes or modifications made according to the spirit of the present invention should be covered in the scope of the present invention.