High-reliability intake and exhaust system of marine V-shaped medium-speed diesel engine

Abstract

The utility model relates to a high-reliability intake and exhaust system of a marine V-shaped medium-speed diesel engine, and belongs to the technical field of intake and exhaust systems. The air cooler is arranged in the supercharger bracket in a penetrating mode, the supercharger is arranged on the top of the supercharger bracket, the exhaust pipeline structure is connected to one side of the supercharger, the air inlet pipeline structure is located below the exhaust pipeline structure, the supercharger bracket is hollow, the air cooler can be placed in the supercharger bracket, and an air outlet is formed in one side of the supercharger bracket. An air inlet is formed in the other side of the supercharger bracket, and an expansion joint is connected between the air inlet and the supercharger. The air inlet pipe and the air outlet pipe are integrally designed, the air cooler is rearranged, the supercharger bracket structure is redesigned and the like, and the air inlet pipe and the air outlet pipe have the advantages of being simple in structure, high in reliability and convenient to assemble and disassemble.

Description

Technical Field

[0001] The utility model belongs to the technical field of intake and exhaust systems, and in particular relates to an intake and exhaust system for a marine V-type medium-speed diesel engine with high reliability. Background Art

[0002] The overall structure of a common intake and exhaust system for a marine V-type medium-speed diesel engine is relatively complex, specifically manifested as follows: two air coolers are used; the high and low temperature water circuits are coupled in the air cooler bracket, resulting in a relatively complex structure of the air cooler bracket itself; the air cooler bracket is designed with a large number of bolt connections and a large number of support brackets; the intake pipe and the exhaust pipe are of a segmented connection type, and the installation process is relatively cumbersome, etc. The complex structure will cause a reduction in reliability, and it is not very convenient for maintenance and application. Content of the Utility Model

[0003] The purpose of the utility model is to provide an intake and exhaust system for a marine V-type medium-speed diesel engine with high reliability, which has the advantages of simple structure, high reliability, and convenient installation and disassembly.

[0004] In order to achieve the above purpose, the technical solution of the utility model provides an intake and exhaust system for a marine V-type medium-speed diesel engine with high reliability, including a supercharger bracket, an air cooler disposed inside the supercharger bracket, a supercharger disposed on the top of the supercharger bracket, an exhaust pipe structure connected to one side of the supercharger, and an intake pipe structure located below the exhaust pipe structure. The inside of the supercharger bracket is hollow to place the air cooler. An air outlet is provided on one side of the supercharger bracket, and an air inlet is provided on the other side of the supercharger bracket. An expansion joint is connected between the air inlet and the supercharger.

[0005] Preferably, bolt fixing structures are respectively provided on both sides of the air outlet of the supercharger bracket, and the supercharger bracket is fixed to the engine body by bolts.

[0006] Preferably, the bolt fixing structure protrudes outward from the side surface of the supercharger bracket.

[0007] Preferably, the end of the bolt fixing structure close to the air outlet is inclined upward.

[0008] Preferably, a guiding structure is provided on the side of the supercharger bracket, and the air inlet is disposed at the top of the guiding structure and faces upward.

[0009] Preferably, a plurality of reinforcing ribs are provided on the top and / or bottom of the supercharger bracket.

[0010] Preferably, both the supercharger and the exhaust pipe structure are provided with two. The ends of the two superchargers connecting the exhaust pipe structure are close to each other, so that a certain inclination angle is formed between the two superchargers.

[0011] Preferably, the two exhaust duct structures are arranged in parallel.

[0012] Preferably, the intake duct structure is an integrally cast structure, and the exhaust duct structure is an integral structure.

[0013] Preferably, a corrugated part is provided in the middle of the exhaust duct structure, and it is connected into one body by a welding process.

[0014] In summary, the present utility model includes the following beneficial technical effects:

[0015] The present utility model relates to diesel engine technology. On the basis of the intake and exhaust structures of existing models, the structures of some components are optimized, the turbocharger bracket is redesigned, etc. The intake and exhaust pipes are respectively designed integrally, the placement form of the air cooler is rearranged, the structure of the turbocharger bracket is redesigned, etc., and it has the advantages of simple structure, high reliability, convenient installation and disassembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of an intake and exhaust system of a highly reliable marine V-type medium-speed diesel engine according to the present utility model;

[0017] Figure 2 It is a schematic side view structure diagram of an intake and exhaust system of a highly reliable marine V-type medium-speed diesel engine according to the present utility model;

[0018] Figure 3 It is a schematic structure diagram of an intake duct structure in an intake and exhaust system of a highly reliable marine V-type medium-speed diesel engine according to the present utility model;

[0019] Figure 4 It is a schematic sectional view of an intake duct structure in an intake and exhaust system of a highly reliable marine V-type medium-speed diesel engine according to the present utility model;

[0020] Figure 5 It is a schematic structure diagram of an exhaust duct structure in an intake and exhaust system of a highly reliable marine V-type medium-speed diesel engine according to the present utility model;

[0021] Figure 6 It is a schematic structure diagram of a turbocharger bracket in an intake and exhaust system of a highly reliable marine V-type medium-speed diesel engine according to the present utility model;

[0022] Figure 7 It is a schematic sectional view of a turbocharger bracket in an intake and exhaust system of a highly reliable marine V-type medium-speed diesel engine according to the present utility model.

[0023] Reference Numerals: 1, air cooler; 2, supercharger; 3, supercharger bracket; 4, intake duct structure; 5, exhaust duct structure; 6, expansion joint; 7, air inlet; 8, air outlet; 9, air cooler installation position; 10, bolt fixing position. Detailed Implementation Manner

[0024] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0025] An intake and exhaust system for a high-reliability marine V-type medium-speed diesel engine is disclosed in an embodiment of the present invention. The main structure of the intake and exhaust system includes: an air cooler 1, a supercharger 2, a supercharger bracket 3, an intake duct structure 4, and an exhaust duct structure 5.

[0026] A single air cooler 1 is installed in the supercharger bracket 3. Two superchargers 2 at a certain inclination angle are supported above the supercharger bracket 3. The supercharger bracket 3 as a whole is fixed to the engine frame by bolts; the intake end of the supercharger 2 is connected to the supercharger bracket 3 through two pipelines, and air finally flows out from the air outlet 8 in the middle of the side of the supercharger bracket 3; the exhaust gas enters the supercharger 2 through the exhaust duct structure 5 and is finally discharged into the atmosphere.

[0027] The intake duct structure 4 is a casting integral structure. Air flows into the engine body air duct from the middle hole on the side of the bracket, and then flows in from the bottom of the intake duct and flows out from both ends to the cylinder head. The exhaust duct structure 5 is an integral structure. The exhaust gas flows into from each cylinder head, flows into the turbine of the supercharger 2 from one side, and the middle corrugated part is connected into one body by welding technology without using bolts and clamps.

[0028] The supercharger bracket 3 is fixed to the engine body through a bolt fixing structure and bolts. The air cooler 1 is installed through the left and right side spaces. There are two air inlets 7 above the guiding structure. At the middle position of the bolt fixing, an air outlet 8 is designed. The air in the air outlet 8 is connected to the intake duct structure 4 through the engine body air duct. There are several reinforcing ribs on the upper and lower parts of the supercharger bracket 3 to enhance the overall structure, and the upper part is also the supporting position of the supercharger 2. Among them, the bolt fixing structure protrudes outward from the surface of the supercharger bracket 3, and the end close to the air outlet 8 is inclined upward, and the end far from the air outlet 8 is inclined downward; an expansion joint 6 is connected between the air inlet 7 and the supercharger 2.

[0029] The intake and exhaust path of the present utility model: Air passes through the supercharger 2 - the pipeline between the supercharger 2 and the expansion joint 6 - and enters the inner cavity of the supercharger bracket 3 after the expansion joint 6. It passes through the air cooler 1 from the inner cavity of the supercharger bracket 3, and then flows into the engine body air passage from the air outlet 8 in the middle of the side, and further flows into the intake pipe structure 4 connected to the engine body air passage. Finally, it flows into the cylinder head from the left and right sides of the intake pipe structure 4.

[0030] On the basis of ensuring functionality, the present utility model simplifies each structure in the intake and exhaust system as much as possible without unnecessary structural coupling; limits the number of air coolers 1 to one, and uses two superchargers 2 with offset angles in combination with a V-type engine; designs the intake and exhaust pipes as integral structures respectively; and fixes the air cooler 1 bracket to the engine body with bolts as a whole. This design has the advantages of simple structure, high reliability, and convenient installation and disassembly.

[0031] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A marine V-type medium-speed diesel engine intake and exhaust system with high reliability, characterized in that It includes a supercharger bracket (3), an air cooler (1) disposed inside the supercharger bracket (3), a supercharger (2) disposed on the top of the supercharger bracket (3), an exhaust duct structure (5) connected to one side of the supercharger (2), and an intake duct structure (4) located below the exhaust duct structure (5). The inside of the supercharger bracket (3) is hollow to place the air cooler (1). An air outlet (8) is provided on one side of the supercharger bracket (3), and an air inlet (7) is provided on the other side of the supercharger bracket (3). An expansion joint (6) is connected between the air inlet (7) and the supercharger (2).

2. The intake and exhaust system of a marine V-type medium-speed diesel engine with high reliability according to claim 1, characterized in that Bolt fixing structures are respectively provided on both sides of the air outlet (8) of the supercharger bracket (3), and the supercharger bracket (3) is fixed to the engine body by bolts.

3. The intake and exhaust system of a marine V-type medium-speed diesel engine with high reliability according to claim 2, characterized in that, The bolt fixing structures protrude outward from the side surface of the supercharger bracket (3).

4. A high-reliability marine V-type medium-speed diesel engine intake and exhaust system according to claim 3, characterized in that The end of the bolt fixing structure close to the air outlet (8) is inclined upward.

5. A high-reliability marine V-type medium-speed diesel engine intake and exhaust system according to claim 1, characterized in that, A guiding structure is provided on the side surface of the supercharger bracket (3), and the air inlet (7) is disposed at the top of the guiding structure and faces upward.

6. The intake and exhaust system of a marine V-type medium-speed diesel engine with high reliability according to claim 1, characterized in that, A number of reinforcing ribs are provided on the top and / or bottom of the supercharger bracket (3).

7. A high-reliability intake and exhaust system for a marine V-type medium-speed diesel engine according to claim 1, characterized in that, Both the supercharger (2) and the exhaust duct structure (5) are provided in two. The ends of the two superchargers (2) connecting the exhaust duct structure (5) are close to each other, so that there is a certain inclination angle between the two superchargers (2).

8. A high-reliability intake and exhaust system for a marine V-type medium-speed diesel engine according to claim 7, characterized in that, The two exhaust duct structures (5) are arranged in parallel.

9. The intake and exhaust system of a high-reliability marine V-type medium-speed diesel engine according to claim 1, characterized in that, The intake duct structure (4) is a casting integral structure, and the exhaust duct structure (5) is an integral structure.

10. A high-reliability marine V-type medium-speed diesel engine intake and exhaust system according to claim 9, characterized in that, A corrugated part is provided in the middle of the exhaust duct structure (5), and it is connected into one body by a welding process.

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