A marine diesel engine air cooling device

Abstract

The utility model discloses a marine diesel engine air cooling device, include: diesel engine body, the output of diesel engine body is installed the joint shaft, and the surface flange fixed connection of joint shaft has pulley, the upper rotation of pulley is installed with the tension pulley, and the upper side rotation of tension pulley is installed with the radiating fan, the outside installation of radiating fan has the fairing, the rotation axle spare surface of pulley, tension pulley and radiating fan all sets up the belt, install the joint shaft at the output of diesel engine body, and the pulley is set up to the surface integration of joint shaft, and the axle spare of pulley and tension pulley and radiating fan form triangle positioning, and set up the belt at the outside of three, utilize the transmission of belt, and then make the joint shaft rotation will be with radiating fan and rotate, according to the rotating speed of joint shaft, let radiating fan carry out automatic adjustment, and then according to the different of rotating speed to the energy increase or consumption reduction of radiating fan.

Description

Technical Field

[0001] This utility model relates to the field of marine diesel engine technology, specifically a marine diesel engine air-cooling device. Background Technology

[0002] Marine diesel engines are engines that generate power by burning diesel fuel. In most existing marine diesel engine air-cooling systems, the engine is placed on an air-cooled heat sink, and a cooling fan is used to exchange heat between the inside and outside of the heat sink to achieve a cooling effect. However, because the marine diesel engine and the heat sink are in close contact, the cooling air from the cooling fan cannot reach this area, thus failing to achieve effective heat dissipation. This results in poor overall heat dissipation of the marine diesel engine, especially at the parts in close contact with the base where heat accumulates and rises, ultimately affecting the operational safety of the diesel engine.

[0003] A marine diesel engine air-cooling device is disclosed in CN222596164U, comprising a base with an installation cavity formed within it. The inner wall of the installation cavity is in contact with the outer surface of the marine diesel engine. Both ends of the base are equipped with heat dissipation drive mechanisms, each including an opening at one end of the base, a support rod connected within the opening, a motor mounted on the outside of the support rod, and a cooling fan located at the motor's output end. The inner wall of the installation cavity has a plurality of evenly distributed heat dissipation grooves extending between the two heat dissipation drive mechanisms, with both ends of the grooves aligned with the opening. This invention enables the diesel engine to form evenly distributed heat dissipation channels in the contact area with the base after installation. These channels have fixed paths and small cross-sectional areas, allowing for stable and high-speed airflow driven by the cooling fan, effectively removing heat from the diesel engine and achieving comprehensive air-cooling of the marine diesel engine.

[0004] Current marine diesel engine air-cooling systems use mounting cavities to house the diesel engine, with cooling devices designed inside these cavities for heat dissipation. While air or water cooling is used within these cavities, the limited internal space causes the cooling device to heat up rapidly during air or water cooling, negatively impacting the engine's cooling performance. Furthermore, the air-cooling structure's installation location cannot effectively dissipate heat from the engine's hottest areas, thus affecting the overall cooling efficiency.

[0005] Therefore, those skilled in the art have provided an air-cooled device for marine diesel engines to solve the problems mentioned in the background art. Utility Model Content

[0006] The purpose of this invention is to provide a marine diesel engine air-cooling device to solve the problem mentioned in the background art that the existing marine diesel engine air-cooling devices cannot achieve an effective heat dissipation effect on the high-heat parts of the diesel engine.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A marine diesel engine air-cooling device includes: a diesel engine body, a coupling installed at the output end of the diesel engine body, and a pulley fixedly connected to the surface flange of the coupling, a tension wheel rotatably installed above the pulley, and a cooling fan rotatably installed on one side above the tension wheel, a guide shroud installed on the outside of the cooling fan, belts being fitted on the surfaces of the rotating shafts of the pulley, tension wheel, and cooling fan, and heat sinks fixedly installed on both the left and right sides of the diesel engine body.

[0009] As a further embodiment of this utility model: the pulley and the coupling surface are fixedly connected, and the positions of the pulley, tension wheel and cooling fan are arranged in a triangle.

[0010] As a further improvement of this utility model, the pulley, tension wheel and cooling fan are interconnected by a belt.

[0011] As a further improvement of this utility model: heat sink is installed inside the heat sink, and a flow guide grille is installed between the heat sinks.

[0012] As a further improvement of this utility model: the heat sink is arranged in a trapezoidal shape, and the heat sink is arranged in a mirror image inside the heat sink base.

[0013] As a further embodiment of this utility model: a flow guide frame is fixedly connected to the surface of the flow guide cover, a guide plate is rotatably installed on the inner wall of the flow guide frame, and a rotating rod is connected in the middle of the surface of the guide plate. A set of fastening nuts and washers is threaded on the surface of the rotating rod, and the guide plate and the flow guide frame form a rotating structure through the rotating rod.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] A coupling is installed at the output end of the diesel engine body. A pulley is integrally integrated into the coupling surface. The pulley, tension wheel, and cooling fan shaft form a triangular positioning, with a belt positioned on the outer side of all three. Belt drive causes the coupling to rotate, which in turn rotates the cooling fan. The cooling fan automatically adjusts according to the coupling's rotational speed, increasing or decreasing its energy consumption based on the speed, thus saving energy during air cooling. The cooling fan is also positioned close to the coupling, which generates significant heat due to rotational friction during output. The proximity of the cooling fan allows it to quickly dissipate this heat, precisely cooling the hottest areas of the diesel engine body and improving cooling efficiency. Furthermore, the cooling fan and heat sink are installed on both sides of the diesel engine body and near the coupling, eliminating the need for air cooling within a semi-enclosed mounting cavity and preventing reverse heat transfer due to limited space. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of an air-cooled device for a marine diesel engine;

[0017] Figure 2 A schematic diagram of a coupling structure for an air-cooled device of a marine diesel engine;

[0018] Figure 3 This is a schematic diagram showing the disassembled structure of a heat sink in a marine diesel engine air-cooling device;

[0019] Figure 4 This is a schematic diagram of the air guide frame in a marine diesel engine air-cooling device.

[0020] In the diagram: 1. Diesel engine body; 2. Radiator base; 3. Coupling; 4. Radiator fins; 5. Radiator shield; 6. Radiator frame; 601. Guide plate; 602. Rotating rod; 603. Fastening nut and washer assembly; 7. Pulley; 8. Tension wheel; 9. Radiator fan; 10. Belt; 11. Radiator grille. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figures 1-4This utility model provides a marine diesel engine air-cooling device, including: a diesel engine body 1, a coupling 3 installed at the output end of the diesel engine body 1, and a pulley 7 fixedly connected to the surface flange of the coupling 3, a tension wheel 8 rotatably installed above the pulley 7, and a cooling fan 9 rotatably installed on one side above the tension wheel 8, a guide shroud 5 installed on the outside of the cooling fan 9, a guide frame 6 fixedly connected to the surface of the guide shroud 5, a guide plate 601 rotatably installed on the inner wall of the guide frame 6, and a rotating rod 602 connected to the middle of the surface of the guide plate 601, and a fastening nut washer set 603 threaded on the surface of the rotating rod 602, and the guide plate 601 and the guide frame 6 form a rotating structure through the rotating rod 602;

[0023] Specifically, the air guide shroud 5 is installed on the outside of the cooling fan 9 to protect the cooling fan 9. At the same time, the airflow is guided by the guide plate 601 on the inner wall of the air guide frame 6. The tilt angle of the guide plate 601 is adjusted by the rotation structure between the guide plate 601 and the rotating rod 602, so that the guide plate 601 can guide the airflow, improve the flow efficiency and flow speed of the airflow, and avoid the disorder of the airflow affecting the cooling speed.

[0024] The rotating shaft surfaces of pulley 7, tension wheel 8 and cooling fan 9 are all fitted with belts 10. Cooling seats 2 are fixedly installed on both sides of the diesel engine body 1. The pulley 7 and the coupling 3 are fixedly connected. The positions of pulley 7, tension wheel 8 and cooling fan 9 are arranged in a triangle. The three are connected to each other by belts 10.

[0025] Specifically, the coupling 3 features an integrated pulley 7. The pulley 7, tension wheel 8, and the shaft of the cooling fan 9 work together to form a stable triangular positioning layout. In this layout, a drive belt 10 surrounds the outer sides of the three components. Through the transmission action of the belt 10, the coupling 3 can drive the cooling fan 9 to rotate synchronously during rotation. The cooling fan 9 can automatically adjust according to the actual speed of the coupling 3. When the speed of the coupling 3 is high, the cooling fan 9 will increase its workload to improve the cooling effect. When the speed of the coupling 3 is low, the cooling fan 9 will reduce its energy consumption accordingly to achieve energy-saving operation. This adjustment mechanism effectively saves the energy consumption of the cooling fan 9 during air cooling. In addition, the cooling fan 9 is installed very close to the coupling 3. During the output process, the coupling 3 generates a lot of heat due to high-speed rotation and friction, causing the ambient temperature to rise. Placing the cooling fan 9 close to the coupling 3 allows it to quickly remove the heat generated by the coupling 3, thereby achieving precise heat dissipation of the high-heat area of ​​the diesel engine body 1 and ensuring the stability and safety of equipment operation.

[0026] The heat sink 2 is equipped with heat sink 4 inside, and a flow guide grille 11 is installed between the heat sink 4. The heat sink 4 is arranged in a trapezoidal shape, and the heat sink 4 is arranged in a mirror image inside the heat sink 2.

[0027] Specifically, the heat sink 2 is installed on both sides of the diesel engine body 1, and the interior of the heat sink 2 is hollow, so that the heat sink 4 installed inside the heat sink 2 can contact the surface of the diesel engine body 1, thereby realizing heat dissipation on both sides of the diesel engine body 1. It works in conjunction with the cooling fan 9 for air cooling. At the same time, the air guide grille 11 is set between the heat sink 4 to guide the hot air. The heat sink 4 adopts a trapezoidal distribution to form a gradient airflow channel, so that the air layer thickness expands outward from the heat source area, reducing turbulence resistance. In conjunction with the cooling fan 9, the airflow speed is increased, and the airflow direction is from front to back, avoiding the heat from accumulating again at the output end of the diesel engine. The rear installation environment of the diesel engine is set to be hollow, so that the airflow can flow from front to back for heat dissipation.

[0028] Working principle: When using this utility model, after the diesel engine body 1 is started, its output coupling 3 begins to rotate. Since the pulley 7 is fixedly connected to the surface of the coupling 3, the pulley 7 rotates synchronously and drives the tension wheel 8 and the cooling fan 9 to rotate together through the belt 10. Under the triangular positioning layout, the three operate stably. The cooling fan 9 automatically adjusts its working intensity according to the rotation speed of the coupling 3 to achieve efficient and energy-saving heat dissipation. At the same time, the heat sink 4 inside the heat sink 2 contacts the surface of the diesel engine body 1 and conducts heat out. The guide grille 11 guides the hot air, and the trapezoidal heat sink 4 forms a gradient airflow channel, which, together with the cooling fan 9, increases the airflow speed, so that the air flows from front to back, avoiding heat accumulation. The guide cover 5 and its guide frame 6 and guide plate 601 further guide and optimize the airflow to ensure that the heat dissipation effect reaches the best, effectively improving the heat dissipation performance and operational stability of the marine diesel engine.

[0029] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A marine diesel engine air-cooling device, characterized in that, include: A diesel engine body (1) is provided with a coupling (3) installed at the output end of the diesel engine body (1), and a pulley (7) is fixedly connected to the surface flange of the coupling (3). A tension wheel (8) is rotatably installed above the pulley (7), and a cooling fan (9) is rotatably installed on one side above the tension wheel (8). A guide shroud (5) is installed on the outside of the cooling fan (9). A belt (10) is fitted on the rotating shaft surfaces of the pulley (7), tension wheel (8) and cooling fan (9). Heat sinks (2) are fixedly installed on both the left and right sides of the diesel engine body (1).

2. The air-cooled device for a marine diesel engine according to claim 1, characterized in that, The pulley (7) is fixedly connected to the surface of the coupling (3), and the pulley (7), tension wheel (8) and cooling fan (9) are arranged in a triangular pattern.

3. The air-cooled device for a marine diesel engine according to claim 1, characterized in that, The pulley (7), tension wheel (8) and cooling fan (9) are connected to each other by a belt (10).

4. The air-cooled device for a marine diesel engine according to claim 1, characterized in that, The heat sink (2) is equipped with heat sink fins (4), and a flow guide grille (11) is installed between the heat sink fins (4).

5. A marine diesel engine air-cooling device according to claim 4, characterized in that, The heat sink (4) is arranged in a trapezoidal shape, and the heat sink (4) is arranged in a mirror image inside the heat sink base (2).

6. The air-cooled device for a marine diesel engine according to claim 1, characterized in that, The surface of the flow guide (5) is fixedly connected to the flow guide frame (6), and the inner wall of the flow guide frame (6) is rotatably installed with a guide plate (601). A rotating rod (602) is connected in the middle of the surface of the guide plate (601). A fastening nut washer set (603) is threaded on the surface of the rotating rod (602). The guide plate (601) and the flow guide frame (6) form a rotating structure through the rotating rod (602).

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