V-type diesel engine double water pump cooling system for generator set

Abstract

The utility model relates to a V type diesel engine double water pump cooling system for generator set belongs to the field of diesel engine, it includes low temperature water pump cooling system and high temperature water pump cooling system, low temperature water pump cooling system includes low temperature water pump, water air cooler and low temperature thermostat, cooling water is transported to water air cooler through low temperature water pump to reduce the temperature of supercharged air, and the air after cooling enters diesel engine and mixes with fuel to burn, high temperature water pump cooling system includes high temperature water pump, cylinder cover water jacket, body water jacket and high temperature thermostat, and the cooling water is transported to cylinder cover water jacket through high temperature water pump and preferentially cools the cylinder cover, and then cools the body through the body water jacket, low temperature water pump cooling system and high temperature water pump cooling system work in coordination, and adjust the cooling water flow through the corresponding thermostat, the utility model is favorable to optimization high temperature water pump cooling system and low temperature water pump cooling system's coordinated work, promotes the cooling efficiency and thermal efficiency of diesel engine.

Description

Technical Field

[0001] This utility model belongs to the field of diesel engines, and relates to a dual water pump cooling system and its arrangement for a V-type diesel engine used for power generation. Background Technology

[0002] Currently, there are two main types of cooling systems for large-displacement V-type diesel engines used in power generation, but both have significant shortcomings that limit the improvement of diesel engine thermal efficiency and the flexibility of their layout. Specifically: (1) The diesel engine uses a single water cooling system. Its cooling process is as follows: the cooling water first cools the oil in the oil cooler through the water pump, then cools the cylinder liner and cylinder head, and finally enters the water-air intercooler to cool the high-temperature air after turbocharging. After being cooled by the radiator, it is circulated for use. However, this type of system has obvious cooling efficiency problems. Because the temperature of the cooling water increases significantly after cooling the oil, cylinder liner and cylinder head, its cooling capacity for the high-temperature turbocharged air is greatly weakened, resulting in a limited reduction in air temperature. After the high-temperature air enters the diesel engine, it cannot mix and burn fully with the fuel because the temperature is still high. This results in incomplete combustion in the diesel engine cylinder and a significant reduction in thermal efficiency.

[0003] (2) The diesel engine adopts a dual cooling system, consisting of an air cooling system and a water cooling system. The air cooling system uses an air-to-air intercooler to cool the high-temperature air after boosting through a fan. The air-to-air intercooler is located in front of the diesel engine, and the fan is driven by the diesel engine via a belt. The water cooling system cools the engine oil in the oil cooler, cylinder liners, and cylinder head in sequence, and finally introduces high-temperature cooling water into the radiator for cooling. The radiator is located behind the air-to-air intercooler and shares a fan with it. Although this arrangement reduces the temperature of the high-temperature air through an independent air cooling system, it has two significant drawbacks: ① The cooled boosted air needs to be connected to the diesel engine intake manifold through a long pipeline, which strictly limits the arrangement distance between the air-to-air intercooler and the diesel engine, reducing the flexibility of the system; ② The water cooling system still adopts the order of cooling the cylinder liners first and then the cylinder head with a higher heat load, resulting in low cooling efficiency, which further affects the thermal efficiency of the diesel engine.

[0004] Existing cooling systems, due to issues such as unreasonable cooling sequence, limited cooling capacity, and layout constraints, cannot meet the requirements of high-efficiency cooling and flexible layout for large-displacement V-type diesel engines used in power generation. Utility Model Content

[0005] The purpose of this utility model is to provide a dual water pump cooling system for V-type diesel engines used in generator sets. By optimizing the synergistic operation of the high-temperature water pump cooling system and the low-temperature water pump cooling system, the cooling efficiency and thermal efficiency of the diesel engine are improved. Furthermore, the system's adaptability and spatial flexibility are enhanced through the flexible arrangement of the water-air cooler and high / low temperature radiators.

[0006] To achieve the above objectives, the present invention provides a dual-water-pump cooling system for a V-type diesel engine used in generator sets, comprising a low-temperature water pump cooling system and a high-temperature water pump cooling system. The low-temperature water pump cooling system includes a low-temperature water pump, a water-air intercooler, and a low-temperature thermostat. Cooling water is pumped by the low-temperature water pump to the water-air intercooler to reduce the temperature of the boosted air, and the cooled air enters the diesel engine to mix and burn with fuel. The high-temperature water pump cooling system includes a high-temperature water pump, a cylinder head water jacket, an engine block water jacket, and a high-temperature thermostat. Cooling water is pumped by the high-temperature water pump to the cylinder head water jacket to preferentially cool the cylinder head, and then to the engine block water jacket to cool the engine block. The low-temperature water pump cooling system and the high-temperature water pump cooling system work together, and the cooling water flow is adjusted by the corresponding thermostat to optimize the cooling effect and improve the thermal efficiency of the diesel engine.

[0007] Preferably, the high-temperature thermostat is used to adjust the flow rate of cooling water entering the high-temperature radiator in real time according to the diesel engine temperature; the low-temperature thermostat is used to adjust the flow rate of cooling water entering the low-temperature radiator according to the cooling water temperature.

[0008] Preferably, the low-temperature water pump is arranged at one end of the gear chamber, and the high-temperature water pump is arranged at the other end of the gear chamber. The two achieve independent cooling circulation through corresponding water channels and thermostats.

[0009] Preferably, the pressurized air cooled by the water-to-air intercooler enters the diesel engine combustion chamber through the intercooler outlet pipe to ensure that the air and fuel are fully mixed.

[0010] Preferably, in the cryogenic water pump cooling system, after being regulated by the cryogenic thermostat, part of the cooling water enters the cryogenic radiator for heat dissipation, while the rest continues to circulate.

[0011] Preferably, the engine block is provided with two spaced-apart water distribution channels, and multiple turbochargers are evenly distributed above each water distribution channel. Cooling water is distributed to each cylinder head water jacket through the water distribution channels.

[0012] Preferably, the high-temperature water pump cooling system further includes a gear chamber water channel, an oil cooler seat water channel, an oil cooler, a water distribution pipe, the engine block water distribution channel, and the high-temperature radiator. Cooling water is delivered to the gear chamber water channel by the high-temperature water pump, cools the engine oil through the oil cooler, and then is distributed to the cylinder head water jacket and the engine block water jacket for cooling through the water distribution pipe and the engine block water distribution channel. Finally, the high-temperature water is regulated by the high-temperature thermostat and enters the high-temperature radiator for heat dissipation.

[0013] Preferably, the cryogenic water pump cooling system further includes a first connecting water pipe, a second connecting water pipe, and the cryogenic radiator. Cooling water is transported to the water-air intercooler through the first connecting water pipe and the second connecting water pipe to cool the pressurized air.

[0014] Preferably, the fan is integrated with the high-temperature radiator and the low-temperature radiator, with the low-temperature radiator positioned close to the fan and the high-temperature radiator placed behind the low-temperature radiator, and the fan provides cooling airflow.

[0015] Preferably, the fan can be directly driven by a diesel engine, or the fan can be electric.

[0016] In summary, this utility model has the following beneficial technical effects: This invention's high-temperature water pump cooling system prioritizes cooling the cylinder head, utilizing the significant temperature gradient between the cylinder head and the cooling water for thorough heat exchange, greatly improving cooling efficiency. Subsequently, the cooling water enters the engine block water jacket to cool the cylinder liner, which has a relatively lower heat load, effectively reducing heat loss from in-cylinder combustion. This cooling sequence not only meets the diesel engine's cooling requirements with a smaller water pump flow rate but also reduces the cross-sectional area of ​​the cooling channels, thereby reducing the size and weight of components and lowering the water pump's power consumption, further improving the diesel engine's thermal efficiency.

[0017] This utility model's independent cryogenic water pump cooling system provides ample cryogenic intake air to the diesel engine, resulting in more complete combustion and further improving thermal efficiency. The water-to-air intercooler is positioned at the rear of the diesel engine, close to the turbocharger and intake manifold, avoiding pressure loss from long pipelines and ensuring cooling performance while improving system compactness. Users can also flexibly arrange the high and low temperature radiators according to the actual space requirements of the diesel generator set, greatly enhancing the system's adaptability and layout freedom, providing a better solution for different application scenarios. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a dual-water-pump cooling system for a V-type diesel engine in a generator set, omitting the connecting water pipes, water-air cooler, and turbocharger. Figure 2 This is a schematic diagram of the cylinder head water jacket and engine block water jacket in a dual water pump cooling system for a V-type diesel engine of a generator set according to the present invention. Figure 3 This is a schematic diagram of the structure of a V-type diesel engine dual water pump cooling system for generator sets, omitting the turbocharger; Figure 4 This is a side view of the fan, low-temperature radiator, and high-temperature radiator in a dual-water-pump cooling system for a V-type diesel engine of a generator set according to the present invention. Figure 5 This is a front view schematic diagram of the fan, low-temperature radiator and high-temperature radiator in a dual-water-pump cooling system for a V-type diesel engine of a generator set according to the present invention. Figure 6 This is a schematic diagram of the overall structure of a dual-water-pump cooling system for a V-type diesel engine in a generator set according to this utility model.

[0019] Attached reference numerals: 1. High-temperature water pump; 2. Gear chamber water passage; 3. Oil cooler seat water passage; 4. Oil cooler; 5. Water distribution pipe; 6. Engine block water distribution passage; 7. Cylinder head water jacket; 8. Engine block water jacket; 9. Engine block water collection passage; 10. High-temperature thermostat; 11. Fan; 12. Low-temperature water pump; 13. Connecting water pipe one; 14. Connecting water pipe two; 15. Water-intercooler; 16. Low-temperature thermostat; 17. Low-temperature radiator; 18. High-temperature radiator; 19. Turbocharger; 20. Turbocharger exhaust pipe; 21. Intercooler exhaust pipe. Detailed Implementation

[0020] 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.

[0021] This utility model discloses a dual-water-pump cooling system for a V-type diesel engine used in generator sets, aiming to improve the thermal efficiency of the diesel engine and optimize its cooling effect. The system includes a low-temperature water pump cooling system and a high-temperature water pump cooling system, each performing its specific function while working together to ensure the stable operation of the diesel engine.

[0022] The cryogenic water pump cooling system is mainly used to reduce the temperature of the high-temperature air after boosting, thereby improving the thermal efficiency of the diesel engine and allowing for more flexible layout of the generator set. Its component, the cryogenic water pump 12, is located at one end of the gear chamber. Through connecting water pipe 13 and connecting water pipe 14, cryogenic cooling water is precisely delivered to the water-to-air intercooler 15. Here, the high-temperature, high-pressure boosted air is cooled by the water-to-air intercooler 15, resulting in a significant decrease in temperature and an increase in density. This provides the diesel engine with more sufficient air to achieve thorough mixing and combustion with the fuel, thus improving thermal efficiency. The cryogenic water pump 12 is connected to a cryogenic thermostat 16. After heat exchange, the cooling water is finely regulated by the cryogenic thermostat 16. Some of the water continues to circulate within the system, while some enters the cryogenic radiator 17, where it is cooled by the airflow of the fan 11. The cooled water then returns to the cryogenic water pump 12, starting a new cooling cycle. During this process, the turbocharger 19, turbocharger outlet pipe 20, and intercooler outlet pipe 21 work closely together to ensure that the pressurized air flows smoothly and is accurately delivered to the water-to-intercooler 15, and then the cooled air is promptly sent to the diesel engine. The entire process is seamless, efficient, and orderly.

[0023] The high-temperature water pump cooling system is mainly used for optimizing the cooling of cylinder liners and cylinder heads, improving the cooling efficiency of the diesel engine, and thus improving the engine's thermal efficiency. The high-temperature water pump 1 is located at the other end of the gear chamber. Through the gear chamber water channel 2 and the oil cooler seat water channel 3, it delivers cooling water to the oil cooler 4 located above the gear chamber to cool the oil and ensure stable oil performance. Subsequently, the cooling water is precisely distributed to each cylinder head water jacket 7 via the distribution pipe 5 and the engine block water channel 6, prioritizing the cooling of the cylinder heads with the highest heat load, effectively reducing cylinder head temperature and preventing mechanical damage caused by overheating. Specifically, the water enters the cylinder head water jacket 7 through the A port near the exhaust side, then enters the lower water jacket around the injectors, enters the engine block water jacket 8 on the exhaust side through the B port, and finally converges in the collector pipe through the C port. The cooling water continues downwards into the engine block water jacket 8, providing comprehensive cooling protection for the engine block. The high-temperature water pump 1 is connected to a high-temperature thermostat 10. The high-temperature thermostat 10 acts as an intelligent control hub, precisely regulating the water flow into the high-temperature radiator 18 based on the real-time temperature of the diesel engine, thereby achieving a dynamic balance in cooling effect. The cooling water fully releases heat in the high-temperature radiator 18, and after being cooled by the strong airflow of the fan 11, it returns to the high-temperature water pump 1, completing an efficient closed-loop cooling cycle.

[0024] In the diesel engine's structural layout, two spaced-apart water distribution channels 6 are arranged on the engine block, with multiple turbochargers 19 evenly distributed above the water distribution channels 6 to ensure uniform distribution and efficient utilization of pressurized air. A gear chamber is located on one side of the engine block, and a water-to-air intercooler 15 is installed above the other side, achieving rational use of space and efficient integration of functions. An oil cooler 4 is installed above the gear chamber, with one end connected to a high-temperature water pump 1 and the other end tightly connected to a low-temperature water pump 12, forming the core architecture of the cooling system.

[0025] Fan 11, as an important component of the cooling system, is integrated with the high-temperature radiator 18 and the low-temperature radiator 17. It can be directly driven by a diesel engine or an electric fan 11, depending on actual needs, offering flexibility. In terms of fan 11 layout, the low-temperature radiator 17 is positioned close to the fan 11 to benefit from the strong airflow and improve heat exchange efficiency; the high-temperature radiator 18 is placed behind the low-temperature radiator 17, and this staggered arrangement allows for full utilization of the cooling airflow, maximizing the heat dissipation effect.

[0026] This invention's dual-pump cooling system, through the precise coordination of the low-temperature water pump 12 and the high-temperature water pump 1, as well as the ingenious layout and efficient collaboration of various cooling components, provides comprehensive and refined cooling protection for V-type diesel engines used in power generation. It not only effectively reduces the temperature of the boosted air and improves the thermal efficiency of the diesel engine, but also optimizes the cooling sequence of the cylinder liner and cylinder head, enhancing the engine's cooling efficiency and ensuring it remains at its peak performance during power generation, providing a solid and reliable guarantee for power supply.

[0027] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended 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 make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A dual-water-pump cooling system for a V-type diesel engine in a generator set, characterized in that, The system includes a low-temperature water pump cooling system and a high-temperature water pump cooling system. The low-temperature water pump cooling system includes a low-temperature water pump (12), a water-air intercooler (15), and a low-temperature thermostat (16). Cooling water is delivered to the water-air intercooler (15) via the low-temperature water pump (12) to reduce the temperature of the pressurized air. The cooled air enters the diesel engine and mixes with fuel for combustion. The high-temperature water pump cooling system includes a high-temperature water pump (1), a cylinder head water jacket (7), an engine block water jacket (8), and a high-temperature thermostat (10). Cooling water is delivered to the cylinder head water jacket (7) via the high-temperature water pump (1) to cool the cylinder head first, and then to the engine block via the engine block water jacket (8). The low-temperature water pump cooling system and the high-temperature water pump cooling system work together and the cooling water flow is adjusted by the corresponding thermostat to optimize the cooling effect and improve the thermal efficiency of the diesel engine.

2. The dual-water-pump cooling system for a V-type diesel engine in a generator set according to claim 1, characterized in that, The high-temperature thermostat (10) is used to adjust the flow rate of cooling water entering the high-temperature radiator (18) in real time according to the diesel engine temperature; the low-temperature thermostat (16) is used to adjust the flow rate of cooling water entering the low-temperature radiator (17) according to the cooling water temperature.

3. The dual-water-pump cooling system for a V-type diesel engine in a generator set according to claim 2, characterized in that, The low-temperature water pump (12) is arranged at one end of the gear chamber, and the high-temperature water pump (1) is arranged at the other end of the gear chamber. The two achieve independent cooling circulation through corresponding water channels and thermostats.

4. The dual-water-pump cooling system for a V-type diesel engine in a generator set according to claim 1, characterized in that, The pressurized air cooled by the water-to-air intercooler (15) enters the diesel engine combustion chamber through the intercooler outlet pipe (21) to ensure that the air and fuel are fully mixed.

5. A dual-water-pump cooling system for a V-type diesel engine in a generator set according to claim 2, characterized in that, In the low-temperature water pump cooling system, after the cooling water is regulated by the low-temperature thermostat (16), part of it enters the low-temperature radiator (17) for heat dissipation, and part of it continues to circulate.

6. A dual-water-pump cooling system for a V-type diesel engine in a generator set according to claim 2, characterized in that, Two spaced-apart water distribution channels (6) are provided on the engine body. Multiple turbochargers (19) are evenly distributed above each of the engine body water distribution channels (6). Cooling water is distributed to each of the cylinder head water jackets (7) through the engine body water distribution channels (6).

7. A dual-water-pump cooling system for a V-type diesel engine in a generator set according to claim 6, characterized in that, The high-temperature water pump cooling system also includes a gear chamber water channel (2), an oil cooler seat water channel (3), an oil cooler (4), a water distribution pipe (5), the engine body water distribution channel (6), and the high-temperature radiator (18). Cooling water is delivered to the gear chamber water channel (2) by the high-temperature water pump (1), and the engine oil is cooled by the oil cooler (4). Then, the cooling water is distributed to the cylinder head water jacket (7) and the engine body water jacket (8) by the water distribution pipe (5) and the engine body water distribution channel (6) for cooling. Finally, the cooling water is regulated by the high-temperature thermostat (10) and enters the high-temperature radiator (18) for heat dissipation.

8. A dual-water-pump cooling system for a V-type diesel engine in a generator set according to claim 2, characterized in that, The cryogenic water pump cooling system also includes a first connecting water pipe (13), a second connecting water pipe (14) and the cryogenic radiator (17). Cooling water is transported to the water-air air cooler (15) through the first connecting water pipe (13) and the second connecting water pipe (14) to cool the pressurized air.

9. A dual-water-pump cooling system for a V-type diesel engine in a generator set according to claim 2, characterized in that, The fan (11) is integrated with the high-temperature radiator (18) and the low-temperature radiator (17). The low-temperature radiator (17) is arranged close to the fan (11), and the high-temperature radiator (18) is placed behind the low-temperature radiator (17). Cooling air is provided by the fan (11).

10. A dual-water-pump cooling system for a V-type diesel engine in a generator set according to claim 9, characterized in that, The fan (11) can be directly driven by a diesel engine or can be electrically driven.

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