A split-flow double-circulation cooling system for a suspended diesel generator set

Abstract

The utility model provides a kind of shunt formula double-cycle cooling system of suspension type diesel generating set, belong to diesel generator technical field, it solves the existing diesel generating set poor cooling effect and other technical problems. Including bottom cooling storage box, the inside of bottom cooling storage box is divided into generator room and cooling placement room, generator room inside is equipped with generator set and battery, the inside of cooling placement room is equipped with cooling backflow structure and smoke filter, cooling backflow structure is located in the downside of smoke filter, the left side of bottom cooling storage box is equipped with oil tank assembly, the right side of bottom cooling storage box is equipped with electric control box and two position-adjusting cooling mechanisms, two position-adjusting cooling mechanisms abut on generator set, cooling backflow structure is connected between bottom cooling storage box and two position-adjusting cooling mechanisms respectively by pipeline. The utility model forms a set of shunt cooling, precision heat conduction, high-efficiency air cooling integrated automation, high reliability diesel generating set thermal management solution.

Description

Technical Field

[0001] This utility model belongs to the technical field of diesel generators and relates to a split-flow dual-cycle cooling system, particularly a split-flow dual-cycle cooling system for a suspended diesel generator set. Background Technology

[0002] Suspended diesel generator sets are generator sets with the fuel tank on the side of the unit and the casing suspended from the bottom of a container by lifting lugs. They are an improvement over existing horizontal diesel generator sets, which are typically used for small to medium power applications or in space-constrained scenarios (such as communication base stations, mobile power stations, and special vehicles). Their cooling systems usually have the following inherent defects:

[0003] The single cooling method results in insufficient efficiency and uniformity, affecting the overall service life and reliability.

[0004] The loose spatial layout and low integration level increase the footprint and make it difficult to deploy the unit in mobile transportation and specific scenarios, making it difficult to meet the urgent needs of modern equipment for compact and modular design.

[0005] The traditional method of fixing fuel tanks is inconvenient to maintain, has poor adaptability, and is costly and time-consuming. In addition, it is prone to loosening under vibration, posing a safety hazard.

[0006] Based on this, we propose a split-flow dual-cycle cooling system for suspended diesel generator sets. Utility Model Content

[0007] The purpose of this utility model is to address the aforementioned problems in existing technologies by proposing a split-flow dual-cycle cooling system for suspended diesel generator sets. The technical problem this utility model aims to solve is: how to achieve efficient split-flow dual-cycle cooling for suspended diesel generator sets and ensure the stability of the thermal management of the diesel generator sets.

[0008] The objective of this utility model can be achieved through the following technical solutions:

[0009] A split-flow dual-cycle cooling system for a suspended diesel generator set includes a bottom-cooled storage box, which is L-shaped. The interior of the bottom-cooled storage box is divided into a generator compartment and a cooling placement compartment. The generator compartment houses the generator set and a battery. The cooling placement compartment houses a cooling return structure and an exhaust filter. The cooling return structure is located below the exhaust filter. A fuel tank assembly is located on the left side of the bottom-cooled storage box, and an electrical control box and two adjusting cooling mechanisms are located on the right side of the bottom-cooled storage box. The two adjusting cooling mechanisms abut against the generator set. The cooling return structure is connected to the bottom-cooled storage box and the two adjusting cooling mechanisms via pipes.

[0010] The working principle of this utility model is as follows: The cooling reflux structure diverts the coolant into the adjusting cooling mechanism and the bottom cooling storage box. The bottom cooling storage box and the two adjusting cooling mechanisms are in direct contact with the heat-generating core of the generator set. They serve as the "cold end" of the system, and the coolant flowing inside directly absorbs the large amount of heat generated by the generator set during operation.

[0011] Heat transfer: After absorbing heat, the coolant becomes a high-temperature coolant, which is pumped out from the regulating cooling mechanism through pipelines, and after passing through the radiator of the generator set, it is transported to the cooling return structure located in the cooling placement chamber.

[0012] The generator set's radiator absorbs the heat carried by the high-temperature coolant, and the hot air is finally dissipated into the external environment after passing through the bottom cooling box, thus lowering the coolant temperature.

[0013] After the coolant has dissipated heat, it is sent back to the return cooling mechanism and bottom cooling box through the cooling return structure to start cooling the generator set again, thus forming a closed and continuous forced cooling cycle; the generator set's radiator provides air cooling for the generator set.

[0014] The battery and electrical control box provide power for the starting and control of all equipment; the fuel tank assembly on the left provides fuel for the generator set; exhaust gas treatment: the exhaust gas generated by the generator set is treated by the exhaust filter and discharged after purification, reducing environmental pollution.

[0015] The bottom-cooled storage box includes a main body with a lower air outlet at the front of the lower side. A cold water cooling box is located inside the bottom of the main body. Several mounting plates are located at the upper end of the bottom of the main body. Circulating water pipe joints for connecting to the cold water cooling box are located on both sides of the bottom of the main body. A transport rack is located in the middle of the upper end of the main body. Two side doors, one large and one small, are hinged to the right side of the generator compartment of the main body. The electrical control box is located on the right side of the main body, in front of the larger side door. Side exhaust vents are located on the larger side door and on the left side of the main body. An air intake is located at the rear of the upper end of the main body, directly above the cooling storage chamber. The exhaust end of the exhaust filter extends above the cooling storage chamber. Mounting through holes are provided on both side doors.

[0016] With the above structure, the cold water cooling tank built into the bottom of the main box is connected to the external cooling equipment through the circulating water pipe joints on both sides to form a large circulation; the cold water flows in the cold water cooling tank, directly and efficiently absorbing the heat of the equipment conducted through the box base, providing a "cold foundation" for the entire box and realizing the cooling of the generator set;

[0017] The air intake draws in cool air, which enters the main housing and carries away the heat from the generator set. The air is then discharged from the lower exhaust port. Side exhaust vents are provided on the larger side door and the left side of the main housing to discharge the radiant heat generated by the generator set during operation and to prevent the area from overheating.

[0018] The L-shaped main enclosure is clearly divided into a generator room and a cooling room, achieving physical isolation between the power system and the cooling system, avoiding mutual interference, and facilitating maintenance; the mounting plate at the bottom and top is used to securely install the generator set; the hinged side door facilitates daily maintenance, and the mounting through hole on it is used to install the adjustment cooling mechanism; the transport rack facilitates equipment hoisting and transportation; and the external electrical control box facilitates operation and monitoring.

[0019] The cooling reflux structure includes two side frames, which are fixed to the upper end of the main body. A cold water tank and two circulating water pumps are fixed to the upper end of the two side frames. The inlet of the two circulating water pumps is connected to the cold water tank through a pipe, and the outlet of one of the circulating water pumps is connected to one of the circulating water pipe joints through a pipe.

[0020] With the above structure, the cold water tank serves as the system's liquid storage and buffer center, storing and initially cooling the circulating coolant; the two circulating water pumps are the system's power source, drawing coolant from the cold water tank and providing power for the coolant circulation.

[0021] Two circulating water pumps achieve coolant diversion:

[0022] Circulation 1 (Box Foundation Cooling): One of the circulating water pumps out coolant and delivers it directly to the cold water cooling tank at the bottom of the bottom cooling storage box through pipes. This circuit is specifically responsible for cooling the box foundation and absorbing the heat conducted to the bottom by the generator set.

[0023] Cycle 2 (Active Cooling of the Unit): Another circulating water pump (inferred from its outlet end) is responsible for pumping coolant to two adjusting cooling mechanisms to directly and actively cool the core heat-generating parts of the generator set;

[0024] Summary and circulation: After completing the heat absorption task, the high-temperature coolant is cooled by passing through the generator set's radiator in two separate loops and then returns to the cooling return structure, waiting to be pumped out again by the circulating water pump, thus forming a closed, continuous forced dual-circulation cooling system.

[0025] The generator set includes a generator, a diesel engine, and a radiator that are interconnected and arranged sequentially from front to back. The generator, diesel engine, and radiator are each provided with several mounting seats on their lower sides. The mounting seats are detachably connected to the mounting plates at corresponding positions. The outlet of the radiator is connected to the cold water tank via a pipe, and another circulating water pipe is connected to the inlet of the radiator via a pipe. The generator and diesel engine are positioned above the cold water cooling tank.

[0026] With the above structure, the diesel engine is the core heat source of the system, generating a large amount of heat during power generation. The generator, driven by the diesel engine, also generates heat. Both are fixed to the mounting plate of the bottom-cooled storage box via mounting brackets, with their bottoms directly contacting the top of the cold water cooling tank, thus simultaneously receiving basic conduction cooling from the bottom. The radiator is the key heat exchange device connecting the two cooling circulation loops. The high-temperature coolant carrying heat returns from the two adjusting cooling mechanisms and the cold water cooling tank, ultimately converging at the radiator's inlet. Forced air cooling: When the generator set is running, the radiator generates forced airflow through a fan. As the coolant flows through the radiator, its heat is carried away by the airflow generated by the fan and blown to the rear. This process achieves the final conversion from liquid cooling to air cooling, significantly reducing the coolant temperature. Coolant return: The liquid cooled in the radiator flows back from its outlet through pipes to the cold water tank of the cooling return structure, completing a complete cycle.

[0027] The fuel tank assembly includes two fuel tank brackets, which are fixed to the left side of the main body. Each fuel tank bracket is equipped with a strap, and a fuel tank is located between the two fuel tank brackets and the straps. The fuel tank is equipped with an oil outlet and an oil filling pipe. A main fuel pump is located between the oil outlet and the fuel inlet pipe of the diesel engine.

[0028] With the above structure, the fuel tank is the fuel storage container, and fuel is added through the fuel filling pipe. The fuel tank is securely fastened to the fuel tank frame by straps, and the fuel tank frame is fixed to the left side of the main body. This design ensures the stability of the fuel tank during equipment operation or movement and prevents displacement due to vibration. The main fuel pump, as the power source, is connected between the fuel outlet and the fuel inlet pipe of the diesel engine. Its function is to generate suction and pressure to continuously and stably pump fuel from the fuel tank into the diesel engine's fuel system.

[0029] The repositioning cooling mechanism includes a repositioning cooling box, which is fixed inside the mounting through hole at a corresponding position. Water inlet holes are provided on both the front and rear sides of the repositioning cooling box, and one water inlet hole is connected to the water inlet of the radiator via a pipe, while the other water inlet hole is connected to the water outlet of another circulating water pump via a pipe. Several rows of evenly spaced connecting screw holes are provided on the right side of the repositioning cooling box, and sealing bolts are screwed into each connecting screw hole. Several rows of evenly spaced mounting bolts are provided on the left side of the repositioning cooling box. When the cooling water is being channeled through the fixed nut, a hollow cooling screw is screwed onto the fixed nut. A sealing gasket is fitted onto the hollow cooling screw, and the inner side of the sealing gasket abuts against the inner wall of the adjusting cooling box. A screw locking nut is screwed onto the hollow cooling screw, and the screw locking nut abuts against the outer side of the sealing gasket. The hollow cooling screw is connected to the adjusting cooling box, and the end of the hollow cooling screw at the corresponding position abuts against the side of the generator and diesel engine. When cooling water is not needed, a locking bolt is screwed onto the fixed nut, and a sealing gasket is fitted onto the locking bolt.

[0030] With the above structure, the positionable cooling box is connected in series in the cooling circuit through the water inlet holes on its front and rear sides. The coolant is pumped into one of the water inlet holes from the outlet of another circulating water pump, flows through the interior of the positionable cooling box, and then flows out from the other water inlet hole, finally flowing to the inlet of the radiator. This ensures that the coolant flows continuously in this circuit.

[0031] The hollow cooling screw is screwed to the left side of the adjusting cooling box by a fixing nut, so that its internal cavity is connected to the adjusting cooling box. Coolant can flow into the interior of the hollow cooling screw. By turning the hollow cooling screw, its extension length can be precisely adjusted so that its end is in close contact with specific heat points on the side of the generator and diesel engine.

[0032] When the coolant flows through the hollow cooling screw, it directly and efficiently absorbs the heat conducted through the screw wall, achieving targeted active cooling of the heat source.

[0033] The sealing gasket is sandwiched between the inner wall of the adjusting cooling box and the screw locking nut. When the screw locking nut is tightened, the sealing gasket is compressed and deformed, thereby achieving a reliable seal and preventing coolant from leaking from the installation point of the hollow cooling screw.

[0034] When a cooling point is no longer needed, a locking bolt and a sealing gasket can be screwed into a fixing nut to reliably seal the interface.

[0035] The outer dimensions of the sealing gasket, screw locking nut, and locking bolt are smaller than the inner diameter of the connecting screw hole, and the ends of the screw locking nut and locking bolt are provided with several tightening notches.

[0036] With the above structure, the outer dimensions of the sealing gasket, screw locking nut, and locking bolt are smaller than the inner diameter of the connecting screw hole, making it easy to pass through the connecting screw hole and install the sealing gasket, screw locking nut, and locking bolt. The ends of the screw locking nut and locking bolt are provided with several tightening notches for screwing the screw locking nut and locking bolt with a screwdriver.

[0037] Compared with existing technologies, the split-flow dual-cycle cooling system of this suspended diesel generator set has the following advantages:

[0038] This system uses a cooling recirculation structure to divert coolant to a bottom cooling tank for basic cooling and a positioning cooling mechanism for active cooling. Ultimately, the heat from both sources converges at the generator set's radiator, and is then expelled into the atmosphere via forced air cooling. The entire process, managed by the electronic control system, forms an automated, highly reliable thermal management solution integrating diversion cooling, precise heat conduction, and efficient air cooling. Attached Figure Description

[0039] Figure 1 This is a three-dimensional structural diagram of the right side of this utility model.

[0040] Figure 2 This is a three-dimensional structural diagram of the left side of this utility model.

[0041] Figure 3 This is a schematic diagram of the internal structure of this utility model.

[0042] Figure 4 This is a schematic diagram of the bottom structure of the bottom-mounted cold storage box of this utility model.

[0043] Figure 5 This is a schematic diagram of the generator set in this utility model.

[0044] Figure 6 This is a structural schematic diagram of the fuel tank assembly in this utility model.

[0045] Figure 7 This is an exploded view of the left side of the positioning and cooling mechanism in this utility model.

[0046] Figure 8 This is an exploded view of the right side of the positioning and cooling mechanism in this utility model.

[0047] In the diagram, 1. Bottom-cooled storage box; 2. Adjustable cooling mechanism; 3. Cooling recirculation structure; 4. Exhaust filter; 5. Generator set; 6. Fuel tank assembly; 7. Electrical control box; 8. Generator room; 9. Cooling storage chamber; 10. Cold water cooling box; 11. Main enclosure; 12. Lower air outlet; 13. Battery; 14. Mounting plate; 15. Side frame; 16. Circulating water pump; 17. Cold water tank; 18. Generator; 19. Mounting base; 20. Diesel engine; 21. Radiator; 22. Exhaust pipe; 23. Oil outlet; 24. Oil tank; 25. Oil filling pipe; 26. Strap; 27. Oil tank bracket; 28. Adjustable cooling box; 29. ​​Fixing nut; 30. Hollow cooling screw; 31. Water inlet; 32. Sealing gasket; 33. Screw locking nut; 34. Locking bolt; 35. Sealing bolt; 36. Connecting screw hole; 37. Circulating water pipe joint; 38. Transport rack; 39. Side door; 40. Air intake. Detailed Implementation

[0048] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0049] like Figures 1-8 As shown, the dual-cycle cooling system of this suspended diesel generator set includes a bottom-cooled storage box 1, which is L-shaped. The interior of the bottom-cooled storage box 1 is divided into a generator compartment 8 and a cooling placement compartment 9. The generator compartment 8 houses the generator set 5 and the battery 13. The cooling placement compartment 9 houses a cooling return structure 3 and an exhaust filter 4. The cooling return structure 3 is located below the exhaust filter 4. The left side of the bottom-cooled storage box 1 houses the fuel tank assembly 6, and the right side of the bottom-cooled storage box 1 houses the electrical control box 7 and two adjusting cooling mechanisms 2. The two adjusting cooling mechanisms 2 abut against the generator set 5. The cooling return structure 3 is connected to the bottom-cooled storage box 1 and the two adjusting cooling mechanisms 2 through pipes.

[0050] The cooling return structure 3 diverts the coolant into the adjustment cooling mechanism 2 and the bottom cooling storage box 1. The bottom cooling storage box 1 and the two adjustment cooling mechanisms 2 are in direct contact with the heat-generating core of the generator set 5. They serve as the "cold end" of the system, and the coolant flowing inside them directly absorbs the large amount of heat generated by the generator set 5 during operation.

[0051] Heat transfer: After absorbing heat, the coolant becomes a high-temperature coolant, which is pumped out from the adjusting cooling mechanism 2 through the pipeline, and after passing through the radiator of the generator set 5, it is transported to the cooling return structure 3 located in the cooling placement chamber 9.

[0052] The radiator of generator set 5 absorbs the heat carried by the high-temperature coolant, and the hot air is finally dissipated into the external environment after passing through the bottom cooling box 1, which significantly reduces the temperature of the coolant.

[0053] After the coolant has dissipated heat, it is sent back to the return cooling mechanism 2 and the bottom cooling box 1 through the cooling return structure 3 to start cooling the generator set 5 again, thus forming a closed and continuous forced cooling cycle; the radiator of the generator set 5 provides air cooling for the generator set 5.

[0054] Battery 13 and electrical control box 7 provide power for the starting and control of all equipment; fuel tank assembly 6 on the left provides fuel for generator set 5; exhaust gas treatment: exhaust gas generated by generator set 5 is treated by exhaust filter 4, purified and discharged to reduce environmental pollution.

[0055] The bottom-cooled storage box 1 includes a main box 11. A lower air outlet 12 is provided at the lower front of the main box 11. A cold water cooling box 10 is provided inside the bottom of the main box 11. Several mounting plates 14 are provided at the upper end of the bottom of the main box 11. Circulating water pipe joints 37 connected to the cold water cooling box 10 are provided on both sides of the bottom of the main box 11. A transport hanger 38 is provided at the middle of the upper end of the main box 11. Two side doors 39, one large and one small, are hinged to the right side of the generator room 8 of the main box 11. An electrical control box 7 is located on the right side of the main box 11, in front of the larger side door 39. Side exhaust vents are provided on the larger side door 39 and on the left side of the main box 11. An air intake 40 is provided at the upper rear of the main box 11, directly above the cooling storage chamber 9. The exhaust end of the smoke filter 4 extends above the cooling storage chamber 9. Mounting through holes are provided on both side doors 39.

[0056] The cold water cooling tank 10, which is built into the bottom of the main housing 11, is connected to external cooling equipment (such as a cooling tower or another circulation system) through the circulating water pipe joints 37 on both sides to form a large circulation. The cold water flows in the cold water cooling tank 10, directly and efficiently absorbing the heat of the equipment conducted through the base of the housing, providing a "cold foundation" for the entire housing and realizing the cooling of the generator set 5.

[0057] The air intake 40 draws in cold air, which enters the main housing 11 and carries away the heat of the generator set 5. The air is then discharged from the lower air outlet 12. Side exhaust vents are provided on the larger side door 39 and on the left side of the main housing 11 to discharge the radiant heat generated by the generator set 5 during operation and to prevent the area from overheating.

[0058] The L-shaped main enclosure 11 is clearly divided into a generator room 8 and a cooling placement room 9, which realizes the physical isolation between the power system and the cooling system, avoids mutual interference, and facilitates maintenance; the mounting plate 14 at the bottom and top is used to securely install the generator set 5; the hinged side door 39 facilitates daily maintenance, and the mounting through hole on it is used to install the adjustment cooling mechanism 2; the transport hanger 38 facilitates equipment hoisting and transportation; and the external electrical control box 7 facilitates operation and monitoring.

[0059] The cooling reflux structure 3 includes two side frames 15, which are fixed to the upper end of the main body 11. A cold water tank 17 and two circulating water pumps 16 are fixed to the upper end of the two side frames 15. The inlet end of the two circulating water pumps 16 is connected to the cold water tank 17 through a pipe, and the outlet end of one of the circulating water pumps 16 is connected to one of the circulating water pipe joints 37 through a pipe.

[0060] The cold water tank 17 serves as the system's liquid storage and buffer center, storing and initially cooling the circulating coolant; the two circulating water pumps 16 are the system's power source, drawing coolant from the cold water tank 17 and providing power for the coolant circulation.

[0061] Two circulating water pumps 16 achieve coolant diversion:

[0062] Cycle 1 (Box base cooling): One of the circulating water pumps 16 pumps out coolant and delivers it directly to the cold water cooling tank 10 at the bottom of the bottom cooling storage box 1 through the pipeline. This circuit is specifically responsible for cooling the box base and absorbing the heat conducted to the bottom by the generator set 5.

[0063] Cycle 2 (Active Cooling of the Unit): Another circulating water pump 16 (inferred from its outlet end) is responsible for pumping coolant to the two adjusting cooling mechanisms 2 to directly and actively cool the core heat-generating parts of the generator set 5;

[0064] Summary and circulation: After completing the heat absorption task, the high-temperature coolant is cooled by passing through the radiator of generator set 5 in two separate loops and then returns to the cooling return structure 3, waiting to be pumped out again by circulating water pump 16, thus forming a closed and continuous forced dual circulation cooling system.

[0065] The generator set 5 includes a generator 18, a diesel engine 20, and a radiator 21 that are interconnected and arranged sequentially from front to back. The generator 18, diesel engine 20, and radiator 21 are each provided with several mounting seats 19 on their lower sides. The mounting seats 19 are detachably connected to the mounting plates 14 at corresponding positions. The outlet of the radiator 21 is connected to the cold water tank 17 through a pipe. Another circulating water pipe joint 37 is connected to the inlet of the radiator 21 through a pipe. The generator 18 and diesel engine 20 are in contact with the top of the cold water cooling box 10.

[0066] The diesel engine 20 is the core heat source of the system, generating a large amount of heat during power generation. The generator 18 is driven by the diesel engine 20 and also generates heat. Both are fixed to the mounting plate 14 of the bottom cooling box 1 by the mounting base 19, and their bottoms directly contact the top of the cold water cooling box 10, thus simultaneously receiving basic conduction cooling from the bottom. The radiator 21 is a key heat exchange device connecting the two cooling circulation loops. The high-temperature coolant carrying heat flows back from the two adjusting cooling mechanisms 2 and the cold water cooling box 10, and finally all converges to the water inlet of the radiator 21 (achieved through the connection of another circulating water pipe joint 37).

[0067] Forced air cooling: When the generator set 5 is running, the radiator 21 generates forced airflow through the fan. When the coolant flows through the inside of the radiator 21, its heat is carried away by the airflow generated by the fan and blown to the rear. This process realizes the final conversion from liquid cooling to air cooling, which significantly reduces the temperature of the coolant.

[0068] Coolant return: The liquid cooled in the radiator 21 flows back from its outlet through a pipe to the cold water tank 17 of the cooling return structure 3, completing a complete cycle.

[0069] The fuel tank assembly 6 includes two fuel tank brackets 27, which are fixed to the left side of the main body 11. Each fuel tank bracket 27 is equipped with a strap 26. A fuel tank 24 is located between the two fuel tank brackets 27 and the strap 26. The fuel tank 24 is equipped with an oil outlet 23 and an oil filling pipe 25. A main oil pump is located between the oil outlet 23 and the oil inlet pipe of the diesel engine 20.

[0070] Fuel tank 24 is a fuel storage container, and fuel is added through fuel filling pipe 25. Fuel tank 24 is securely fastened to fuel tank frame 27 by straps 26, and fuel tank frame 27 is fixed to the left side of main tank body 11. This design ensures the stability of fuel tank during equipment operation or movement and prevents displacement due to vibration. The main fuel pump, as the power source, is connected between fuel outlet 23 and fuel inlet pipe of diesel engine 20. Its function is to generate suction and pressure to continuously and stably pump fuel from fuel tank 24 into fuel system of diesel engine 20.

[0071] The repositioning cooling mechanism 2 includes a repositioning cooling box 28, which is fixed inside the mounting through hole at the corresponding position. Water inlet holes 31 are provided on both the front and rear sides of the repositioning cooling box 28. One side of the water inlet hole 31 is connected to the water inlet of the radiator 21 via a pipe, and the other side of the water inlet hole 31 is connected to the water outlet of another circulating water pump 16 via a pipe. Several rows of evenly spaced connecting screw holes 36 are provided on the right side of the repositioning cooling box 28, and sealing bolts 35 are screwed into each connecting screw hole 36. Several rows of evenly spaced fixing nuts 29 are provided on the left side of the repositioning cooling box 28 for heat conduction. When water is being drawn, a hollow cooling screw 30 is screwed onto the fixing nut 29. A sealing gasket 32 ​​is fitted onto the hollow cooling screw 30, and the inner side of the sealing gasket 32 ​​abuts against the inner side wall of the adjusting cooling box 28. A screw locking nut 33 is screwed onto the hollow cooling screw 30, and the screw locking nut 33 abuts against the outer side of the sealing gasket 32. The hollow cooling screw 30 is connected to the adjusting cooling box 28, and the end of the hollow cooling screw 30 at the corresponding position abuts against the side of the generator 18 and the diesel engine 20. When cooling water is not required, a locking bolt 34 is screwed onto the fixing nut 29, and a sealing gasket 32 ​​is fitted onto the locking bolt 34.

[0072] The adjustable cooling box 28 is connected in series in the cooling circuit through the water inlet holes 31 on its front and rear sides. The coolant is pumped into one of the water inlet holes 31 from the outlet of another circulating water pump 16, flows through the interior of the adjustable cooling box 28, and then flows out from the other water inlet hole 31, eventually flowing to the inlet of the radiator 21. This ensures that the coolant flows continuously in this circuit.

[0073] The hollow cooling screw 30 is screwed to the left side of the adjusting cooling box 28 by the fixing nut 29, so that its internal cavity is connected to the adjusting cooling box 28. The coolant can flow into the interior of the hollow cooling screw 30. By turning the hollow cooling screw 30, its extension length can be precisely adjusted so that its end is in close contact with the specific heat points on the side of the generator 18 and the diesel engine 20.

[0074] When the coolant flows through the hollow cooling screw 30, it directly and efficiently absorbs the heat conducted through the screw wall, achieving targeted active cooling of the heat source.

[0075] The sealing gasket 32 ​​is sandwiched between the inner wall of the adjusting cooling box 28 and the screw locking nut 33. When the screw locking nut 33 is tightened, the sealing gasket 32 ​​is compressed and deformed, thereby achieving a reliable seal and preventing coolant from leaking from the installation point of the hollow cooling screw 30.

[0076] When a cooling point is no longer needed, the locking bolt 34 and the sealing gasket 32 ​​can be screwed into the fixing nut 29 to reliably seal the interface.

[0077] The outer dimensions of the sealing gasket 32, the screw locking nut 33, and the locking bolt 34 are smaller than the inner diameter of the connecting screw hole 36, and the ends of the screw locking nut 33 and the locking bolt 34 are provided with several tightening notches.

[0078] The outer dimensions of the sealing gasket 32, the screw locking nut 33, and the locking bolt 34 are smaller than the inner diameter of the connecting screw hole 36, making it easy to pass through the connecting screw hole 36 and install the sealing gasket 32, the screw locking nut 33, and the locking bolt 34. The ends of the screw locking nut 33 and the locking bolt 34 are provided with several tightening notches for screwing the screw locking nut 33 and the locking bolt 34 with a screwdriver.

[0079] The working principle of this utility model:

[0080] I. Start-up of power and heat source

[0081] Fuel supply: The fuel in the fuel tank assembly 6 is pumped to the diesel engine 20 via the main fuel pump.

[0082] Power control: Battery 13 provides power for starting, and the electrical control box 7 controls the starting and operation of the entire system (including diesel engine 20, circulating water pump 16, etc.).

[0083] Heat source generation: Diesel engine 20 starts, driving generator 18 to generate electricity. During this process, diesel engine 20 and generator 18 become the core heat source of the system.

[0084] II. Core Cooling Process of "Split-Flow Dual-Circulation"

[0085] The core of the system is driven by the cooling reflux structure 3, which establishes two independent coolant circulation paths through two circulating water pumps 16:

[0086] Cycle 1 (Box Base Cooling Circuit):

[0087] Path: Circulating water pump 16 → Circulating water pipe joint 37 → Cold water cooling tank 10 (located at the bottom of the main body 11) → Another circulating water pipe joint 37 → Radiator 21 → Cold water tank 17.

[0088] Function: The coolant flows through the cold water cooling tank 10 built into the bottom of the box, directly absorbing the heat from the bottom of the generator set 5 conducted down through the mounting plate 14, providing a "cold foundation" type basic cooling for the unit.

[0089] Cycle 2 (Unit Active Cooling Circuit):

[0090] Path: Another circulating water pump 16 → Adjustable cooling mechanism 2 → Radiator 21 → Cold water tank 17.

[0091] Function: Coolant is pumped into the adjusting cooling mechanism 2. Here, coolant flows into the hollow cooling screws 30 whose length can be precisely adjusted. The ends of these screws directly and tightly abut against the core heat-generating points on the sides of the generator 18 and diesel engine 20, achieving targeted and active conduction cooling and efficiently absorbing the main heat.

[0092] III. Ultimate Heat Dissipation and Air Circulation (Liquid-Gas Heat Exchange)

[0093] Heat collection: The high-temperature coolant, after completing its heat absorption task, flows from the two circuits mentioned above to the inlet of the radiator 21 of the generator set 5 itself.

[0094] Forced air cooling: When generator set 5 is running, the fan of radiator 21 generates a strong airflow. When the high-temperature coolant flows through the thin tubes inside radiator 21, its heat is carried away by the airflow, realizing the ultimate conversion from liquid cooling to air cooling, and the coolant itself is significantly cooled.

[0095] Airflow channel:

[0096] Air intake: Cooling airflow is drawn in from the air intake 40 located directly above the cooling chamber 9.

[0097] Exhaust: The air carrying heat flows through the radiator 21 and becomes hot air, which is finally discharged from the lower air outlet 12 at the bottom front of the box, forming an efficient vertical heat dissipation air duct.

[0098] Auxiliary heat dissipation: The generator room 8 discharges the radiant heat generated during unit operation through the side exhaust vents to avoid local overheating.

[0099] IV. Closed-loop regeneration and auxiliary system

[0100] Coolant return: The coolant cooled in the radiator 21 flows back from its outlet to the cold water tank 17 of the cooling return structure 3 for storage and buffering, waiting to be pumped back into the two circulation loops by the circulating water pump 16, thus forming a closed and continuous forced cooling cycle.

[0101] Exhaust gas treatment: The exhaust gas generated by the diesel engine 20 is purified by the exhaust filter 4 and then discharged upward into the cooling chamber 9 to reduce environmental pollution.

[0102] In summary, this system achieves refined cooling management through a "split-flow dual-circulation design." One circulation path is dedicated to the basic thermal conduction cooling of the chilled water cooling tank 10 in the bottom cooling storage box 1, while the other path uses the hollow cooling screw 30 of the adjusting cooling mechanism 2 to provide targeted and active contact cooling to the core heat-generating parts of the generator set 5. This combination of "surface + point" ensures that heat can be quickly and directly removed from the heat source, avoiding the heat dissipation blind spots that may exist in traditional single cooling methods, and significantly improving overall cooling efficiency and reliability.

[0103] The bottom-cooled storage box 1 adopts an L-shaped design, clearly dividing the space into a generator room 8 and a cooling storage room 9, achieving physical isolation and functional modularization between the power system and the cooling system. This layout not only avoids mutual interference between systems, but also highly integrates components such as the fuel tank assembly 6, the electrical control box 7, and the cooling return structure 3 onto the box body, greatly optimizing space utilization. This makes the entire system compact and occupies a small area, making it very suitable for deployment in space-constrained environments.

[0104] This system is designed with ease of installation, commissioning, and subsequent maintenance in mind. The hollow cooling screw 30 of the adjustable cooling mechanism 2 is length-adjustable, flexibly adapting to different cooling needs and installation tolerances. Key sealing components (such as the sealing gasket 32) are compactly sized and can pass through the connecting screw hole 36, enabling convenient assembly and disassembly within the enclosure. Together with the hinged side door 39, the external electrical control box 7, and the top transport rack 38, this system constitutes a user-friendly system that facilitates daily maintenance, component replacement, and equipment hoisting.

[0105] This system forms a closed-loop forced circulation, effectively preventing coolant contamination and evaporation loss, resulting in more stable operation. The multi-stage heat dissipation mechanism of "water cooling + air cooling" (cold water cooling tank 10, hollow cooling screw 30, and forced air cooling of radiator 21) provides it with strong heat dissipation redundancy. Meanwhile, the independent exhaust filter 4 ensures that exhaust gases are purified, meeting environmental protection requirements. The robust mounting plate 14 and the oil tank rack 27 with straps 26, among other structural designs, also ensure long-term stable operation of the equipment even under moving or vibrating conditions.

[0106] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A split-flow dual-cycle cooling system for a suspended diesel generator set, comprising a bottom-cooled storage box (1), characterized in that, The bottom-cooled storage box (1) is L-shaped. The interior of the bottom-cooled storage box (1) is divided into a generator room (8) and a cooling storage room (9). The generator room (8) is equipped with a generator set (5) and a battery (13). The cooling storage room (9) is equipped with a cooling reflux structure (3) and a smoke filter (4). The cooling reflux structure (3) is located below the smoke filter (4). The bottom-cooled storage box (1) is equipped with an oil tank assembly (6) on the left side. The bottom-cooled storage box (1) is equipped with an electrical control box (7) and two adjusting cooling mechanisms (2) on the right side. The two adjusting cooling mechanisms (2) are in contact with the generator set (5). The cooling reflux structure (3) is connected to the bottom-cooled storage box (1) and the two adjusting cooling mechanisms (2) through pipes.

2. The dual-cycle cooling system for a suspended diesel generator set according to claim 1, characterized in that, The bottom-cooled storage box (1) includes a main box (11), with a lower air outlet (12) at the front of the lower side of the main box (11), a cold water cooling box (10) inside the bottom of the main box (11), several mounting plates (14) at the upper end of the bottom of the main box (11), circulating water pipe joints (37) connected to the cold water cooling box (10) on both sides of the bottom of the main box (11), a handling rack (38) at the middle of the upper end of the main box (11), and a hinged device on the right side of the generator room (8) of the main box (11). There are two side doors (39) of different sizes, one large and one small, distributed in front and back. The electrical control box (7) is located on the right side of the main body (11). The electrical control box (7) is located in front of the larger side door (39). Side exhaust vents are provided on the larger side door (39) and on the left side of the main body (11). An air intake (40) is provided on the upper rear side of the main body (11). The air intake (40) is located directly above the cooling placement chamber (9). The exhaust end of the smoke filter (4) extends above the cooling placement chamber (9). Installation through holes are provided on both side doors (39).

3. The dual-cycle cooling system for a suspended diesel generator set according to claim 2, characterized in that, The cooling reflux structure (3) includes two side frames (15), which are fixed to the upper end of the main body (11). A cold water tank (17) and two circulating water pumps (16) are fixed to the upper end of the two side frames (15). The inlet end of the two circulating water pumps (16) is connected to the cold water tank (17) through a pipe, and the outlet end of one of the circulating water pumps (16) is connected to one of the circulating water pipe joints (37) through a pipe.

4. The dual-cycle cooling system for a suspended diesel generator set according to claim 3, characterized in that, The generator set (5) includes a generator (18), a diesel engine (20) and a radiator (21) that are connected to each other and arranged sequentially from front to back. The generator (18), the diesel engine (20) and the radiator (21) are provided with several mounting seats (19) on their lower sides. The mounting seats (19) are detachably connected to the mounting plates (14) at the corresponding positions. The outlet of the radiator (21) is connected to the cold water tank (17) through a pipe. Another circulating water pipe joint (37) is connected to the inlet of the radiator (21) through a pipe. The generator (18) and the diesel engine (20) are in contact with the top of the cold water cooling box (10).

5. The dual-cycle cooling system for a suspended diesel generator set according to claim 4, characterized in that, The fuel tank assembly (6) includes two fuel tank brackets (27), which are fixed to the left side of the main body (11). Each fuel tank bracket (27) is equipped with a strap (26). A fuel tank (24) is provided between the two fuel tank brackets (27) and the strap (26). The fuel tank (24) is equipped with an oil outlet (23) and an oil filling pipe (25). A main oil pump is provided between the oil outlet (23) and the oil inlet pipe of the diesel engine (20).

6. The dual-cycle cooling system for a suspended diesel generator set according to claim 5, characterized in that, The adjusting cooling mechanism (2) includes an adjusting cooling box (28), which is fixed inside the mounting through hole at the corresponding position. Water inlets (31) are provided on both the front and rear sides of the adjusting cooling box (28). One water inlet (31) is connected to the water inlet of the radiator (21) via a pipe, and the other water inlet (31) is connected to the water outlet of another circulating water pump (16) via a pipe. Several rows of evenly spaced connecting screw holes (36) are provided on the right side of the adjusting cooling box (28), and sealing bolts (35) are screwed into each connecting screw hole (36). Several rows of evenly spaced fixing nuts (29) are provided on the left side of the adjusting cooling box (28) for guiding cooling water. A hollow cooling screw (30) is screwed onto the fixing nut (29). A sealing gasket (32) is fitted onto the hollow cooling screw (30). The inner side of the sealing gasket (32) abuts against the inner side wall of the adjusting cooling box (28). A screw locking nut (33) is screwed onto the hollow cooling screw (30). The screw locking nut (33) abuts against the outer side of the sealing gasket (32). The hollow cooling screw (30) is connected to the adjusting cooling box (28). The end of the hollow cooling screw (30) at the corresponding position abuts against the side of the generator (18) and the diesel engine (20). When cooling water is not required, a locking bolt (34) is screwed onto the fixing nut (29). A sealing gasket (32) is fitted onto the locking bolt (34).

7. The dual-cycle cooling system for a suspended diesel generator set according to claim 6, characterized in that, The outer dimensions of the sealing gasket (32), screw locking nut (33) and locking bolt (34) are smaller than the inner diameter of the connecting screw hole (36), and the ends of the screw locking nut (33) and locking bolt (34) are provided with several tightening notches.

Images