CN216922288U

CN216922288U - Noise reduction structure for large marine engine

Info

Publication number: CN216922288U
Application number: CN202123422055.6U
Authority: CN
Inventors: 杨光伟; 孙慧侠
Original assignee: Jiangsu Priya Power Technology Co ltd
Current assignee: Jiangsu Priya Power Technology Co ltd
Priority date: 2021-12-31
Filing date: 2021-12-31
Publication date: 2022-07-08
Anticipated expiration: 2031-12-31

Abstract

The utility model discloses a noise reduction structure for a large-scale marine engine, which comprises an engine unit, wherein the engine unit is arranged in an engine cabin and is internally provided with a plurality of fans, the front end of each fan is provided with a first silencer, each first silencer comprises a flange plate, one end of each flange plate is connected with the corresponding fan, the other end of each flange plate is provided with a plurality of layers of silencing sheets, each silencing sheet is made of circular rock wool, each silencing sheet is provided with a plurality of densely distributed small holes, the plurality of layers of silencing sheets are arranged at intervals and wrapped into a cylindrical structure through aluminum skins, a cooling fan of the engine unit is connected with the outside of the engine cabin through a corrugated pipe, the inside of the corrugated pipe is provided with the silencing sheets, the front bulkhead and the rear bulkhead of the engine cabin are provided with exhaust fans, the exhaust fans are provided with second silencers, each second silencer comprises a plurality of silencing sheets distributed at intervals, activated carbon layers are arranged in the intervals of the silencing sheets, the silencing sheets and the activated carbon layers are wrapped into a cylindrical shape through the aluminum skins and are connected with the exhaust fans through the flanges, the top of the engine compartment is provided with a plurality of spatial sound absorbers.

Description

Noise reduction structure for large marine engine

Technical Field

The utility model relates to a noise reduction structure for a large marine engine.

Background

An engine, also called an engine, is a machine capable of converting other forms of energy into another form of energy, usually converts chemical energy into mechanical energy, and the motion principle of the engine is to convert the linear reciprocating motion of a piston in a cylinder into rotary motion by using a crankshaft and output power. When a traditional marine engine is used, various noises are generated due to the reciprocating linear motion of a piston, and the riding experience of passengers is influenced, so that a noise reduction structure for reducing the noises of the engine is urgently needed at present.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the defects of the prior art and provides a noise reduction structure for a large-scale marine engine.

A noise reduction structure for a large-scale marine engine comprises an engine unit, wherein the engine unit is arranged in an engine compartment, the engine compartment comprises an air inlet system, the air inlet system comprises a plurality of fans, a frame which is welded and connected through a rectangular pipe is arranged at the top of the engine compartment, the fans are connected with the top of the engine compartment through the frame, a first silencer is arranged at the front end of each fan, the first silencer comprises a flange plate, one end of the flange plate is connected with the fans, a plurality of layers of silencing sheets are arranged at the other end of the flange plate, each silencing sheet is circular rock wool, a plurality of densely distributed small holes are formed in each silencing sheet, the plurality of layers of silencing sheets are arranged at intervals and wrapped into a cylindrical structure through aluminum sheets, the cylindrical structure is connected with the flange plate, a cooling fan of the engine unit is connected with the outside of the engine compartment through a corrugated pipe, silencing sheets are arranged in the corrugated pipe, and exhaust fans are arranged on the front and back bulkheads of the engine compartment, be equipped with the second silencer on the exhaust fan, the second silencer includes a plurality of layers interval distribution's noise elimination piece, is equipped with the activated carbon layer in the interval of noise elimination piece, and noise elimination piece and activated carbon layer pass through the aluminium skin parcel and become the cylindric and link to each other with the exhaust fan through the ring flange, and the top in engine compartment is equipped with a plurality of space sound absorber.

As further improvement, the number of the fans of the air inlet system is 4, and the four fans are divided into two rows.

As a further improvement, the area of the small holes on the silencing sheet accounts for 20-35% of the total area of the silencing sheet.

As a further improvement, the shape of the space sound absorber is plate-shaped, the framework of the space sound absorber is made of aluminum, superfine glass wool is filled in the framework, and a plastic net is coated outside the framework.

As a further improvement, the spatial sound absorber is hung on the top of the engine compartment through a string.

As a further improvement, the total area of the spatial sound absorbers is 30-40% of the top area of the engine compartment.

Has the beneficial effects that:

the utility model has the advantages of ingenious design, optimized air circulation in the engine compartment, improved noise reduction performance due to the fact that the silencing pieces are arranged at the air inlet and the air exhaust positions, better cooling effect due to the fact that the engine unit cooling fan exhausts hot air through the corrugated pipeline, capability of absorbing smoke dust and reducing pollution due to the fact that the activated carbon layer is arranged at the air exhaust position, and further noise reduction due to the fact that the space sound absorber is arranged in the compartment.

Drawings

FIG. 1 is a schematic view of the general construction of a noise reducing structure for a large marine engine;

1. the sound absorber comprises an engine compartment 2, an engine unit 3, a fan 4, a first silencer 5, a silencing sheet 6, a radiating fan 7, a corrugated pipe 8, an exhaust fan 9, a second silencer 10, an activated carbon layer 11 and a space sound absorber.

Detailed Description

For the purpose of enhancing the understanding of the present invention, the present invention will be further described in detail with reference to the following examples and the accompanying drawings, which are only used for explaining the present invention and are not to be construed as limiting the scope of the present invention.

As shown in fig. 1, a noise reduction structure for a large marine engine includes an engine compartment 1, an engine block 2, a fan 3, a first muffler 4, a noise reduction fin 5, a heat radiation fan 6, a corrugated pipe 7, a discharge fan 8, a second muffler 9, an activated carbon layer 10, and a spatial sound absorber 11.

The number of the fans of the air inlet system is 4, and the four fans are divided into two rows.

Wherein, the area of the small holes on the silencing sheet accounts for 20-35% of the total area of the silencing sheet.

The space sound absorber is in a plate shape, a framework of the space sound absorber is made of aluminum, superfine glass wool is filled in the framework, and a plastic net is coated outside the framework.

Wherein, the space sound absorber is hung on the top of the engine compartment through a string.

Wherein the total area of the spatial sound absorber is 30-40% of the top area of the engine compartment.

The utility model optimizes the air circulation in the engine compartment, arranges the silencing pieces at the air inlet and the air exhaust positions, improves the noise reduction performance, utilizes the cooling fan of the engine unit to exhaust hot air through the corrugated pipeline, has better cooling effect, is also provided with the active carbon layer at the air exhaust position, can absorb smoke dust and reduce pollution, and is also provided with the spatial sound absorber in the compartment to further reduce noise.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. A noise reduction structure for a large-scale marine engine is characterized by comprising an engine unit, wherein the engine unit is arranged in an engine compartment, the engine compartment comprises an air inlet system, the air inlet system comprises a plurality of fans, a frame which is welded and connected through a rectangular pipe is arranged at the top of the engine compartment, the fans are connected with the top of the engine compartment through the frame, a first silencer is arranged at the front end of each fan, each first silencer comprises a flange, one end of each flange is connected with the corresponding fan, a plurality of layers of silencing sheets are arranged at the other end of each flange, each silencing sheet is circular rock wool, each silencing sheet is provided with a plurality of densely distributed small holes, the plurality of layers of silencing sheets are arranged at intervals and wrapped into a cylindrical structure through aluminum sheets, the cylindrical structure is connected with the corresponding flange, a cooling fan of the engine unit is connected with the outside of the engine compartment through a corrugated pipe, silencing sheets are arranged in the corrugated pipe, fans are arranged on the front and back bulkheads of the engine compartment, be equipped with the second silencer on the exhaust fan, the second silencer includes a plurality of layers interval distribution's noise elimination piece, is equipped with the activated carbon layer in the interval of noise elimination piece, and noise elimination piece and activated carbon layer pass through the aluminium skin parcel and become the cylindric and link to each other with the exhaust fan through the ring flange, and the top in engine compartment is equipped with a plurality of space sound absorber.

2. A noise reduction structure for a large marine engine according to claim 1, wherein the number of the fans of the air intake system is 4, and four fans are divided into two rows.

3. A noise reduction structure for a large marine engine according to claim 1, wherein the area of the small holes of the noise-reduction sheet is 20 to 35% of the total area of the noise-reduction sheet.

4. The noise reduction structure for the large marine engine according to claim 1, wherein the spatial sound absorber is shaped like a plate, the framework of the spatial sound absorber is made of aluminum, the inside of the framework is filled with ultra-fine glass wool, and the framework is covered with a plastic net.

5. A noise reducing structure for a large marine engine according to claim 1, wherein the spatial sound absorber is suspended on the top of the engine room by a string.

6. A noise reduction structure for a large marine engine according to claim 1, wherein the total area of said spatial sound absorbers is 30 to 40% of the area of the top of the engine compartment.