Methanol diesel engine atomization premixing device and diesel engine

Abstract

The utility model discloses a methanol diesel engine atomization premixing device which comprises a methanol atomization assembly and a mixing cavity assembly, an outlet of a compressed air pipe is communicated with an inlet of an atomized methanol spraying pipe, the compressed air pipe and the atomized methanol spraying pipe are coaxially arranged, and an outlet of a methanol suction pipe is communicated with the inlet of the atomized methanol spraying pipe. The extending direction of the methanol suction pipe is perpendicular to the compressed air pipe and the atomized methanol spraying pipe, an outlet of the pressurized air pipe is communicated with an inlet of the mixed spraying pipe, the pressurized air pipe and the mixed spraying pipe are coaxially arranged, and an outlet of the atomized methanol conveying pipe is communicated with the joint of the pressurized air pipe and the mixed spraying pipe. And the extension direction of the atomized methanol conveying pipe is perpendicular to the pressurized air pipe and the mixed spraying pipe. Compared with a traditional pressure atomizing nozzle, the pressure atomizing nozzle has a better atomizing effect, and liquid drop particles are obviously smaller than those of the pressure nozzle, so that methanol and air are mixed more uniformly, and combustion is more sufficient. The utility model further discloses a diesel engine comprising the atomization premixing device of the methanol diesel engine.

Description

Technical Field

[0001] This utility model relates to the field of diesel engine equipment, and in particular to a methanol diesel engine atomizing premixing device. Furthermore, this utility model also relates to a diesel engine including the aforementioned methanol diesel engine atomizing premixing device. Background Technology

[0002] Diesel engines still hold a very large share in the shipping industry as the main power source. However, with the increasing demand for low-carbon emissions and the application of new energy sources, methanol is gradually becoming the most suitable fuel.

[0003] However, currently, methanol is injected entirely using pressure spray, which typically operates at a pressure of around 0.6 MPa. This low pressure results in poor spray quality and excessively large droplets. This is detrimental to combustion within the diesel engine, leading to excessively high combustion temperatures in the combustion chamber, low methanol substitution rates and ratios, and also results in high costs and poor performance of methanol-fueled diesel engines.

[0004] Therefore, how to provide a methanol-diesel engine atomization premixing device to improve combustion efficiency is a technical problem that needs to be solved by those skilled in the art. Utility Model Content

[0005] The purpose of this invention is to provide a methanol-diesel engine atomizing premixing device. Based on a specific structure, it utilizes the Venturi effect to form atomized methanol. The atomized particles are significantly smaller than the methanol particles ejected from the pressure nozzle, resulting in a more uniform mixing of methanol and air and more complete combustion. Another purpose of this invention is to provide a diesel engine including the aforementioned methanol-diesel engine atomizing premixing device.

[0006] To solve the above-mentioned technical problems, this utility model provides a methanol-diesel engine atomization premixing device, including a methanol atomization component and a mixing chamber component. The methanol atomization component includes a compressed air pipe, an atomized methanol injection pipe, and a methanol intake pipe. The outlet of the compressed air pipe is connected to the inlet of the atomized methanol injection pipe, and the two are arranged coaxially. The outlet of the methanol intake pipe is connected to the inlet of the atomized methanol injection pipe. The extending direction of the methanol intake pipe is perpendicular to the compressed air pipe and the atomized methanol injection pipe. The mixing chamber component includes a booster air pipe, a mixing injection pipe, and an atomized methanol delivery pipe. The outlet of the booster air pipe is connected to the inlet of the mixing injection pipe, and the two are arranged coaxially. The outlet of the atomized methanol delivery pipe is connected to the connection between the booster air pipe and the mixing injection pipe. The extending direction of the atomized methanol delivery pipe is perpendicular to the booster air pipe and the mixing injection pipe. The outlet of the atomized methanol injection pipe is connected to the inlet of the atomized methanol delivery pipe, and the two are arranged coaxially.

[0007] Preferably, a multi-hole nozzle is installed at the inlet end of the atomizing methanol spray pipe, and the multi-hole nozzle has multiple through holes that extend axially through it.

[0008] Preferably, the multi-hole nozzle is provided with a plurality of alternating straight pipe nozzles and a plurality of Laval nozzles.

[0009] Preferably, it includes three straight nozzles and three Laval nozzles.

[0010] Preferably, the inlet end of the multi-hole nozzle is provided with a limiting platform, which abuts against the outlet end face of the compressed air pipe.

[0011] Preferably, a gap is provided between the outer wall of the porous nozzle and the inner wall of the atomizing methanol spray pipe, and an opening aligned with the gap is provided on the side wall of the atomizing methanol spray pipe, and the outlet of the methanol suction pipe is connected to the opening.

[0012] Preferably, the atomizing methanol spray pipe is provided with connecting flanges at both ends, and sealing rings are provided at the connecting flanges.

[0013] Preferably, the multi-hole nozzle is installed inside the mixing spray pipe.

[0014] Preferably, a mixing sleeve is installed at the outlet end inside the atomizing methanol spray pipe, and the diameter of the inner hole of the mixing sleeve gradually decreases and then increases from the inlet to the outlet.

[0015] This utility model provides a diesel engine, including the methanol diesel engine atomizing premixing device as described in any one of the above.

[0016] This utility model provides a methanol-diesel engine atomization premixing device, including a methanol atomization assembly and a mixing chamber assembly. The methanol atomization assembly includes a compressed air pipe, an atomized methanol injection pipe, and a methanol intake pipe. The outlet of the compressed air pipe is connected to the inlet of the atomized methanol injection pipe, and the two are arranged coaxially. The outlet of the methanol intake pipe is connected to the inlet of the atomized methanol injection pipe, and the extending direction of the methanol intake pipe is perpendicular to the compressed air pipe and the atomized methanol injection pipe. The mixing chamber assembly includes a booster air pipe, a mixing injection pipe, and an atomized methanol delivery pipe. The outlet of the booster air pipe is connected to the inlet of the mixing injection pipe, and the two are arranged coaxially. The outlet of the atomized methanol delivery pipe is connected to the connection between the booster air pipe and the mixing injection pipe, and the extending direction of the atomized methanol delivery pipe is perpendicular to the booster air pipe and the mixing injection pipe. The outlet of the atomized methanol injection pipe is connected to the inlet of the atomized methanol delivery pipe, and the two are arranged coaxially.

[0017] The methanol atomization assembly, through the arrangement of a compressed air pipe, an atomized methanol spray pipe, and a methanol intake pipe, utilizes the Venturi effect to spray atomized methanol, which then enters the mixing chamber assembly. The mixing chamber assembly, through the arrangement of a pressurized air pipe, a mixing spray pipe, and an atomized methanol delivery pipe, fully mixes the methanol with the pressurized air using the Venturi effect. Compared to traditional pressure atomizing nozzles, it has a better atomization effect, with droplet particles significantly smaller than those in pressure nozzles, resulting in a more uniform mixing of methanol and air and more complete combustion.

[0018] This utility model also provides a diesel engine including the above-mentioned methanol diesel engine atomization premixing device. Since the above-mentioned methanol diesel engine atomization premixing device has the above-mentioned technical effects, the above-mentioned diesel engine should also have the same technical effects, which will not be described in detail here. Attached Figure Description

[0019] Figure 1 A schematic diagram of a specific embodiment of the methanol-diesel engine atomizing premixing device provided by this utility model;

[0020] Figure 2 This is a front view schematic diagram of the methanol atomization component in a specific embodiment of the methanol-diesel engine atomization premixing device provided by this utility model.

[0021] Figure 3 This is a side view of the methanol atomization component in a specific embodiment of the methanol-diesel engine atomization premixing device provided by this utility model.

[0022] The components include: 1. Compressed air pipe; 2. Atomized methanol spray pipe; 3. Methanol intake pipe; 4. Boosted air pipe; 5. Mixing spray pipe; 6. Atomized methanol delivery pipe; 7. Multi-hole nozzle; 8. Mixing sleeve; 9. Straight pipe nozzle; 10. Laval nozzle. Detailed Implementation

[0023] The core of this invention is to provide a methanol-diesel engine atomizing premixing device. Based on a specific structure, it utilizes the Venturi effect to form atomized methanol. The atomized particles are significantly smaller than the methanol particles sprayed from the pressure nozzle, resulting in a more uniform mixing of methanol and air and more complete combustion. Another core aspect of this invention is to provide a diesel engine including the aforementioned methanol-diesel engine atomizing premixing device.

[0024] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] Please refer to Figure 1 , Figure 1 This is a schematic diagram of a specific embodiment of the methanol-diesel engine atomization premixing device provided by this utility model.

[0026] This utility model provides a methanol-diesel engine atomization premixing device, including a methanol atomization component and a mixing chamber component. Methanol is atomized in the methanol atomization component and then fed into the mixing chamber component, where the atomized methanol is thoroughly mixed with pressurized air. The methanol atomization component includes a compressed air pipe 1, an atomized methanol injection pipe 2, and a methanol intake pipe 3. The inlet of the compressed air pipe 1 is connected to a compressed air source, and the outlet of the compressed air pipe 1 is connected to the inlet of the atomized methanol injection pipe 2, with both pipes arranged coaxially. The inlet of the methanol intake pipe 3 is connected to a methanol source, and the outlet of the methanol intake pipe 3 is connected to the inlet of the atomized methanol injection pipe 2. The extending direction of the methanol intake pipe 3 is perpendicular to the compressed air pipe 1 and the atomized methanol injection pipe 2, i.e., the compressed air pipe 1, the atomized methanol injection pipe 2, and the methanol intake pipe 3 form a T-shaped pipe structure. The mixing chamber assembly includes a pressurized air pipe 4, a mixing injection pipe 5, and an atomized methanol delivery pipe 6. The inlet of the pressurized air pipe 4 is connected to a pressurized air source, and the outlet of the pressurized air pipe 4 is connected to the inlet of the mixing injection pipe 5, with both arranged coaxially. The outlet of the atomized methanol delivery pipe 6 is connected to the junction of the pressurized air pipe 4 and the mixing injection pipe 5. The extension direction of the atomized methanol delivery pipe 6 is perpendicular to the pressurized air pipe 4 and the mixing injection pipe 5. The outlet of the atomized methanol injection pipe 6 is connected to the inlet of the atomized methanol delivery pipe 6, with both arranged coaxially. The outlet of the mixing injection pipe 5 is connected to a diesel engine.

[0027] During operation, compressed air blows straight through compressed air pipe 1 and atomized methanol injection pipe 2. Due to the Venturi effect created by the high-speed airflow at methanol intake pipe 3, methanol is drawn into atomized methanol injection pipe 2, where it is atomized into particles by the impact of the airflow. Further, pressurized air blows straight through pressurized air pipe 4 and mixing injection pipe 5. Due to the Venturi effect created by the high-speed airflow at atomized methanol delivery pipe 6, atomized methanol is drawn into the mixing chamber, accelerating its entry speed and ensuring thorough mixing with the pressurized air before entering the combustion chamber for combustion.

[0028] The methanol atomizing assembly, through the arrangement of compressed air pipe 1, atomized methanol spray pipe 2, and methanol intake pipe 3, utilizes the Venturi effect to spray atomized methanol, which then enters the mixing chamber assembly. The mixing chamber assembly, through the arrangement of pressurized air pipe 4, mixing spray pipe 5, and atomized methanol delivery pipe 6, utilizes the Venturi effect to fully mix with pressurized air. Compared with traditional pressure atomizing nozzles, it has a better atomization effect, and the droplet particles are significantly smaller than those of pressure nozzles, resulting in a more uniform mixing of methanol and air and more complete combustion.

[0029] Please refer to Figure 2 and Figure 3 , Figure 2 This is a front view schematic diagram of the methanol atomization component in a specific embodiment of the methanol-diesel engine atomization premixing device provided by this utility model. Figure 3This is a side view of the methanol atomization component in a specific embodiment of the methanol-diesel engine atomization premixing device provided by this utility model.

[0030] In the methanol-diesel atomizing premixing device provided in the specific embodiment of this utility model, a multi-hole nozzle 7 is installed at the inlet end inside the atomizing methanol injection pipe 2, and the multi-hole nozzle 7 is provided with multiple through holes that penetrate axially.

[0031] Specifically, the multi-hole nozzle 7 is provided with multiple alternating straight nozzles 9 and multiple Laval nozzles 10, including three straight nozzles 9 and three Laval nozzles 10. The number and arrangement of each nozzle can also be adjusted as needed, all within the protection scope of this utility model. Compressed air enters the multi-hole nozzle 7 through the compressed air pipe 1. Through the multiple Laval nozzles 10 and straight nozzles 9 on the multi-hole nozzle 7, the compressed air will cause a cross-jet phenomenon after being discharged through the nozzles. The methanol intake pipe 3 is drawn into the multi-hole nozzle 7 due to the Venturi effect formed by the high-speed airflow. When methanol and high-speed airflow both enter the interior of the atomizing methanol spray pipe 2, due to the action of the cross-jet high-speed airflow, the methanol is continuously collided under the impact of the cross-jet airflow and the action of low air pressure, causing the droplets to break into small methanol vapor particles, thereby improving the atomization effect.

[0032] For stable installation, a limiting platform is provided at the inlet end of the multi-hole nozzle 7, which abuts against the outlet end face of the compressed air pipe 1. Simultaneously, a gap is provided between the outer wall of the multi-hole nozzle 7 and the inner wall of the atomized methanol spray pipe 2. An opening aligned with this gap is provided on the side wall of the atomized methanol spray pipe 2, which is connected to the outlet of the methanol suction pipe 3. Connecting flanges are provided at both ends of the atomized methanol spray pipe 2, with sealing rings at the flanges. Connections can be made via flange bolts or threads, both within the protection scope of this utility model. The multi-hole nozzle 7 can also be installed inside the mixing spray pipe 5 to improve the mixing effect.

[0033] Based on the methanol-diesel engine atomization premixing device provided in the above specific embodiments, a mixing sleeve 8 is installed at the outlet end inside the atomized methanol injection pipe 2. The inner diameter of the mixing sleeve 8 gradually decreases and then increases from the inlet to the outlet, changing the airflow direction and further improving the atomization mixing effect.

[0034] In addition to the methanol-diesel engine atomization premixing device described above, this utility model also provides a diesel engine including the methanol-diesel engine atomization premixing device described above. For the structure of other parts of the diesel engine, please refer to the prior art, which will not be repeated here.

[0035] The methanol-diesel engine atomizing premixing device and diesel engine provided by this utility model have been described in detail above. Specific examples have been used to illustrate the principle and implementation of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core idea of ​​this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A methanol-diesel engine atomizing premixing device, characterized in that, The system includes a methanol atomizing assembly and a mixing chamber assembly. The methanol atomizing assembly includes a compressed air pipe (1), an atomized methanol spray pipe (2), and a methanol intake pipe (3). The outlet of the compressed air pipe (1) is connected to the inlet of the atomized methanol spray pipe (2), and the two are arranged coaxially. The outlet of the methanol intake pipe (3) is connected to the inlet of the atomized methanol spray pipe (2). The extending direction of the methanol intake pipe (3) is perpendicular to the compressed air pipe (1) and the atomized methanol spray pipe (2). The mixing chamber assembly includes a pressurized air pipe (4). The system comprises a mixing nozzle (5) and an atomized methanol delivery pipe (6). The outlet of the pressurized air pipe (4) is connected to the inlet of the mixing nozzle (5) and the two are arranged coaxially. The outlet of the atomized methanol delivery pipe (6) is connected to the connection between the pressurized air pipe (4) and the mixing nozzle (5). The extension direction of the atomized methanol delivery pipe (6) is perpendicular to the pressurized air pipe (4) and the mixing nozzle (5). The outlet of the atomized methanol nozzle (2) is connected to the inlet of the atomized methanol delivery pipe (6) and the two are arranged coaxially.

2. The methanol-diesel engine atomizing premixing device according to claim 1, characterized in that, The inlet end of the atomized methanol spray pipe (2) is equipped with a multi-hole nozzle (7), and the multi-hole nozzle (7) is provided with multiple through holes that penetrate axially.

3. The methanol-diesel engine atomizing premixing device according to claim 2, characterized in that, The multi-hole nozzle (7) is provided with multiple straight pipe nozzles (9) and multiple Laval nozzles (10) arranged alternately.

4. The methanol-diesel engine atomizing premixing device according to claim 3, characterized in that, It includes the three straight nozzles (9) and the three Laval nozzles (10).

5. The methanol-diesel engine atomizing premixing device according to claim 4, characterized in that, The inlet end of the multi-hole nozzle (7) is provided with a limiting platform, which abuts against the outlet end face of the compressed air pipe (1).

6. The methanol-diesel engine atomizing premixing device according to claim 5, characterized in that, A gap is provided between the outer wall of the porous nozzle (7) and the inner wall of the atomizing methanol spray pipe (2), and an opening aligned with the gap is provided on the side wall of the atomizing methanol spray pipe (2), and the outlet of the methanol suction pipe (3) is connected to the opening.

7. The methanol-diesel engine atomizing premixing device according to claim 1, characterized in that, The atomizing methanol spray pipe (2) is provided with connecting flanges at both ends, and sealing rings are provided at the connecting flanges.

8. The methanol-diesel engine atomizing premixing device according to claim 2, characterized in that, The multi-hole nozzle (7) is installed inside the mixing nozzle (5).

9. The methanol-diesel engine atomizing premixing device according to any one of claims 1 to 8, characterized in that, The outlet end of the atomized methanol spray pipe (2) is equipped with a mixing sleeve (8), and the inner diameter of the mixing sleeve (8) gradually decreases and then increases from the inlet to the outlet.

10. A diesel engine, characterized in that, Includes the methanol-diesel engine atomizing premixing device as described in any one of claims 1 to 9.

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