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

Abstract

The invention 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 mount and dismount.

Description

Technical Field

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

[0002] The overall structure of the common marine V-type medium-speed diesel engine intake and exhaust system is relatively complex, which is specifically manifested in: using two air coolers; 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 more bolt connections and more bracket supports; the intake and exhaust pipes are connected in sections, and the installation process is relatively cumbersome, etc. The complex structure will reduce reliability and is not convenient for maintenance and application. Summary of the invention

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

[0004] In order to achieve the above-mentioned purpose, the technical solution of the present invention provides a high-reliability marine V-type medium-speed diesel engine intake and exhaust system, including a supercharger bracket, an air cooler inserted into the supercharger bracket, a supercharger arranged 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 supercharger bracket is hollow inside to place the air cooler, one side of the supercharger bracket is provided with an air outlet, the other side of the supercharger bracket is provided with an air inlet, and an expansion joint is connected between the air inlet and the supercharger.

[0005] Preferably, the supercharger bracket is provided with bolt fixing structures on both sides of the air outlet, and the supercharger bracket is fixed to the machine 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 guide structure is provided on the side of the supercharger bracket, and the air inlet is provided on the top of the guide structure and is arranged upward.

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

[0010] Preferably, the number of the supercharger and the number of the exhaust pipe structure are both two, and the ends of the two superchargers connected to the exhaust pipe structure are close to each other, so that there is a certain inclination angle between the two superchargers.

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

[0012] Preferably, the air intake duct structure is a cast one-piece structure, and the exhaust duct structure is an one-piece structure.

[0013] Preferably, a corrugated part is provided in the middle of the exhaust pipe structure, and the exhaust pipe structure is connected as a whole through a welding process.

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

[0015] The present invention relates to diesel engine technology. On the basis of the intake and exhaust structure of existing models, the structure of some parts is optimized, the supercharger bracket is redesigned, etc., the intake and exhaust pipes are designed to be integrated, the placement of the air cooler is rearranged, the supercharger bracket structure is redesigned, etc., and it has the advantages of simple structure, high reliability and convenient installation and disassembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure of a high-reliability marine V-type medium-speed diesel engine intake and exhaust system of the present invention;

[0017] Figure 2 It is a side view structural schematic diagram of a high-reliability marine V-type medium-speed diesel engine intake and exhaust system of the present invention;

[0018] Figure 3 It is a structural schematic diagram of an intake pipe structure in an intake and exhaust system of a V-type medium-speed marine diesel engine with high reliability according to the present invention;

[0019] Figure 4 It is a cross-sectional schematic diagram of an intake pipe structure in an intake and exhaust system of a V-type medium-speed diesel engine for a marine application with high reliability according to the present invention;

[0020] Figure 5 It is a structural schematic diagram of an exhaust pipe structure in an intake and exhaust system of a V-type medium-speed diesel engine for a ship with high reliability according to the present invention;

[0021] Figure 6 It is a structural schematic diagram of a supercharger bracket in a high-reliability marine V-type medium-speed diesel engine intake and exhaust system of the present invention;

[0022] Figure 7 The present invention is a cross-sectional schematic diagram of a supercharger bracket in a high-reliability marine V-type medium-speed diesel engine intake and exhaust system.

[0023] Figure numerals: 1. air cooler; 2. supercharger; 3. supercharger bracket; 4. air 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 DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

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

[0026] A single air cooler 1 is installed in a supercharger bracket 3, and two superchargers 2 with a certain tilt angle are supported on the supercharger bracket 3. The supercharger bracket 3 is fixed to the frame as a whole by bolts; the air inlet end of the supercharger 2 is connected to the supercharger bracket 3 through two pipes, and the 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 pipe structure 5 and is finally discharged into the atmosphere.

[0027] The intake duct structure 4 is a cast integrated structure, and the air flows into the airway of the engine body 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 integrated structure, and the exhaust gas flows in from each cylinder head and flows into the turbine of the supercharger 2 from one side. The middle corrugated part is connected as a whole by welding technology, without using bolts and clamps.

[0028] The supercharger bracket 3 is fixed to the machine 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 guide structure. An air outlet 8 is designed in the middle position of the bolt fixing. The air in the air outlet 8 is connected to the air inlet duct structure 4 through the machine body air duct. There are several reinforcing ribs on the upper and lower parts of the supercharger bracket 3 to strengthen the overall structure. The upper part is also the support 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 away 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 air intake and exhaust path of the present invention is as follows: the air passes through the supercharger 2-the pipe between the supercharger 2 and the expansion joint 6-the expansion joint 6 and then enters the inner cavity of the supercharger bracket 3, passes through the air cooler 1 from the inner cavity of the supercharger bracket 3, and then flows into the body airway from the air outlet 8 in the middle of the side, and then flows into the intake duct structure 4 connected to the body airway, and finally flows into the cylinder head from the left and right sides of the intake duct structure 4.

[0030] On the basis of ensuring functionality, the present invention simplifies the structures in the intake and exhaust systems as much as possible, and does not perform unnecessary structural coupling; the number of air coolers 1 is limited to one, and two superchargers 2 with offset angles are used in conjunction with the V-type engine; the intake and exhaust pipes are designed as an integrated structure; the bracket of the air cooler 1 is fixed 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 is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A highly reliable marine V-type medium-speed diesel engine intake and exhaust system, characterized in that: The invention comprises a supercharger bracket (3), an air cooler (1) inserted into the supercharger bracket (3), a supercharger (2) arranged on the top of the supercharger bracket (3), an exhaust pipe structure (5) connected to one side of the supercharger (2), and an intake pipe structure (4) located below the exhaust pipe structure (5); the interior of the supercharger bracket (3) is hollow and can accommodate the air cooler (1); one side of the supercharger bracket (3) is provided with an air outlet (8); the other side of the supercharger bracket (3) is provided with an air inlet (7); an expansion joint (6) is connected between the air inlet (7) and the supercharger (2).

2. A highly reliable marine V-type medium-speed diesel engine intake and exhaust system according to claim 1, characterized in that: The supercharger bracket (3) is provided with bolt fixing structures on both sides of the air outlet (8), and the supercharger bracket (3) is fixed to the machine body by bolts.

3. A highly reliable marine V-type medium-speed diesel engine intake and exhaust system according to claim 2, characterized in that: The bolt fixing structure protrudes outward from the side surface of the supercharger bracket (3).

4. A highly reliable 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 highly reliable marine V-type medium-speed diesel engine intake and exhaust system according to claim 1, characterized in that: A guide structure is provided on the side of the supercharger bracket (3), and the air inlet (7) is arranged on the top of the guide structure and is arranged upward.

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

7. A highly reliable marine V-type medium-speed diesel engine intake and exhaust system according to claim 1, characterized in that: The number of the supercharger (2) and the number of the exhaust pipe structure (5) are both two, and the ends of the two superchargers (2) connected to the exhaust pipe structure (5) are close to each other so that there is a certain inclination angle between the two superchargers (2).

8. A highly reliable marine V-type medium-speed diesel engine intake and exhaust system according to claim 7, characterized in that: The two exhaust pipe structures (5) are arranged in parallel.

9. A highly reliable marine V-type medium-speed diesel engine intake and exhaust system according to claim 1, characterized in that: The air intake pipe structure (4) is a cast one-piece structure, and the exhaust pipe structure (5) is an one-piece structure.

10. A highly reliable marine V-type medium-speed diesel engine intake and exhaust system according to claim 9, characterized in that: The exhaust pipe structure (5) is provided with a corrugated part in the middle, and is connected as a whole through a welding process.

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