A marine generator set cooling system

Abstract

The application relates to the field of generator set cooling technology, and particularly discloses a marine generator set cooling system, which comprises parallel prime mover cooling modules and generator set cooling modules and a shared ultimate cooling module. Each module adopts an integrated heat exchange mechanism, and the same cooling oil circulation pipeline is used to simultaneously realize cooperative cooling of equipment lubricating oil and a shell / case body; the ultimate cooling module uses seawater to perform ultimate cooling on the cooling oil of the two modules through parallel seawater heat exchangers. The application simplifies the system structure through modularization and integration design, adopts a hierarchical cooling architecture, significantly improves the heat dissipation efficiency and uniformity, and guarantees the operation reliability and service life of the marine generator set.

Description

Technical Field

[0001] This application relates to the field of generator set cooling technology, and in particular to a marine generator set cooling system. Background Technology

[0002] Marine generator sets are a core component of a ship's propulsion system, providing crucial power for navigation, operations, and daily life. Marine generator sets, especially those using gas turbines or diesel engines as prime movers, offer advantages such as high power density and rapid dynamic response. However, during long-term high-load operation, the high-temperature components of the prime mover (such as cylinders and turbines) and the generator itself generate significant amounts of heat. If this heat cannot be dissipated promptly and effectively, it will lead to excessively high equipment temperatures, causing problems such as component performance degradation, lubricant deterioration, and increased thermal stress in materials, seriously threatening the reliability, safety, and service life of the generator set.

[0003] Currently, cooling solutions for marine generator sets mostly employ relatively simple cooling structures. For example, common practices include cooling only the lubricating oil inside the generator set, or dissipating heat from the equipment casing solely through air cooling or simple liquid cooling. These traditional cooling methods have the following shortcomings: a single cooling path cannot simultaneously achieve efficient and uniform heat dissipation for both the critical working medium (such as lubricating oil) inside the equipment and the external structural casing. Excessively high lubricating oil temperatures will cause its viscosity to decrease, deteriorating its lubrication performance and accelerating equipment wear; while heat accumulation in the casing will affect the insulation performance and operational stability of internal electrical components. Existing technology lacks a comprehensive solution that coordinates the cooling of the internal medium with the heat dissipation of the external casing. Utility Model Content

[0004] To address the shortcomings of existing technologies, this application provides a cooling system for marine generator sets.

[0005] The cooling system for a marine generator set provided in this application adopts the following technical solution: A marine generator cooling system includes: The prime mover cooling module includes a prime mover lubricating oil cooling mechanism and a prime mover housing cooling mechanism, which are used to cool the prime mover lubricating oil and the prime mover housing, respectively; it also includes a first heat exchange mechanism, which uses a first cooling medium to circulate as a cold source for the prime mover lubricating oil cooling mechanism and the prime mover housing cooling mechanism. The generator set cooling module includes a generator set lubricating oil cooling mechanism and a generator set housing cooling mechanism, which are used to cool the generator set lubricating oil and the generator set housing respectively; it also includes a second heat exchange mechanism, which uses a second cooling medium to circulate as a cold source for the generator set lubricating oil cooling mechanism and the generator set housing cooling mechanism. The ultimate cooling module uses a third cooling medium as a cold source to cool the first and second cooling media.

[0006] This application employs a modular design to separate and allow the cooling systems of the prime mover and generator set to operate independently in parallel, avoiding the design redundancy and mutual interference risks associated with a single, complex system. Each module utilizes an integrated heat exchange mechanism, enabling simultaneous and coordinated cooling of both the lubricating oil and the outer casing / enclosure—two critical heat sources—improving the problems of single-target cooling and uneven heat dissipation inherent in traditional solutions. Furthermore, the introduction of a final cooling module for centralized cooling creates a tiered cooling system, achieving multi-level utilization of cooling energy and significantly enhancing the overall integrity, reliability, and energy efficiency of the entire ship's propulsion system cooling.

[0007] Furthermore, both the first and second cooling media are cooling oil, and the third cooling media is seawater.

[0008] Using cooling oil as the intermediate cooling medium, its advantages of high specific heat capacity, good insulation, and low system internal resistance enable stable and safe heat exchange on the equipment side. Simultaneously, utilizing inexhaustible seawater as the ultimate cooling source significantly reduces operating costs, making it particularly suitable for marine applications.

[0009] Furthermore, the prime mover lubricating oil cooling mechanism includes a first lubricating oil heat exchanger, and the prime mover housing cooling mechanism includes a first thermally conductive material layer thermally coupled to the prime mover housing; the first heat exchange mechanism includes a prime mover cooling oil circulation pipeline, the flow path of which is configured to flow through the first lubricating oil heat exchanger and exchange heat with the first thermally conductive material layer.

[0010] By coupling the cooling of the prime mover lubricating oil and the cooling of the housing through the same set of cooling oil circulation pipelines, a single circulation system can simultaneously meet two different cooling needs. This simplifies the pipeline layout, reduces the number of independent components such as pumps and valves, lowers the system complexity and manufacturing cost, and achieves comprehensive and efficient heat dissipation of the core heat-generating parts of the prime mover.

[0011] Furthermore, the first thermally conductive material layer is a graphene thermally conductive material layer, and a cooling channel for the flow of the first cooling medium is provided inside it.

[0012] Graphene's extremely high thermal conductivity allows it to rapidly and evenly diffuse heat from the prime mover's casing throughout the entire material layer and transfer it to the cooling oil in the internal flow channels, resulting in high heat transfer efficiency.

[0013] Furthermore, the prime mover cooling oil circulation pipeline includes a first cooling oil pump and a first cooling oil tank; the outlet pipeline of the first cooling oil pump is divided into two paths: one path is connected to the cooling channel in the first thermally conductive material layer, and the other path is connected to the first lubricating oil heat exchanger; the two return oil paths merge and flow through the final cooling module for heat exchange.

[0014] A single cooling oil pump drives two parallel cooling oil circuits, one for cooling the prime mover housing and the other for cooling the prime mover lubricating oil, achieving efficient distribution of cooling oil. This design not only simplifies the drive source and reduces energy consumption, but also ensures that the flow rate and pressure of the two cooling circuits can be independently designed and optimized, resulting in high system integration and more stable and reliable operation.

[0015] Furthermore, the generator set lubricating oil cooling mechanism includes a second lubricating oil heat exchanger, and the generator set housing cooling mechanism includes a second thermally conductive material layer thermally coupled to the generator set housing; the second heat exchange mechanism includes a generator set cooling oil circulation pipeline, the flow path of which is configured to flow through the second lubricating oil heat exchanger and exchange heat with the second thermally conductive material layer.

[0016] Similar to the prime mover cooling module, the generator set cooling module also uses a set of cooling oil circulation pipelines to simultaneously handle the heat dissipation of the generator set housing and the lubricating oil, ensuring the independence and integrity of the generator set's temperature control, avoiding thermal coupling interference with the prime mover, and improving the flexibility of system deployment.

[0017] Furthermore, the second thermally conductive material layer is a graphene thermally conductive material layer, and a cooling channel for the flow of the second cooling medium is provided inside it.

[0018] Similar to the first thermally conductive material layer, the second thermally conductive material layer also uses a graphene thermally conductive material layer with a high thermal conductivity to achieve efficient heat transfer.

[0019] Furthermore, the generator set cooling oil circulation pipeline includes a second cooling oil pump and a second cooling oil tank; the outlet pipeline of the second cooling oil pump is divided into two paths: one path is connected to the cooling channel in the second thermally conductive material layer, and the other path is connected to the second lubricating oil heat exchanger; the two return oil paths merge and flow through the final cooling module for heat exchange.

[0020] Similar to the first heat exchange mechanism, the second heat exchange mechanism also uses a cooling oil pump to drive two parallel cooling oil circuits, which are used to cool the generator set housing and the generator set lubricating oil respectively, thus achieving efficient distribution of cooling oil.

[0021] Furthermore, the ultimate cooling module includes a first seawater heat exchanger, a second seawater heat exchanger, and a seawater circulation pipeline. The first seawater heat exchanger is used to exchange heat between the first cooling medium and seawater, the second seawater heat exchanger is used to exchange heat between the second cooling medium and seawater, and the seawater circulation pipeline is used to provide seawater as a cold source for the first and second seawater heat exchangers.

[0022] By setting up two independent seawater heat exchangers and sharing a single seawater circulation pipeline, a "centralized water intake and decentralized heat exchange" approach for ultimate cooling is achieved. This architecture ensures physical isolation between the prime mover and generator cooling circuits during the ultimate cooling stage, while also sharing core equipment such as seawater pumps, saving installation space and equipment costs.

[0023] Furthermore, the seawater circulation pipeline includes a seawater pump, and its outlet pipeline is divided into two parallel branches: one leading to the first seawater heat exchanger and the other leading to the second seawater heat exchanger.

[0024] By designing the seawater pipeline as parallel branches, the amount of seawater flowing to the two seawater heat exchangers does not interfere with each other. It can be independently adjusted according to the actual heat load of each cooling circuit, avoiding the problem of decreasing cooling efficiency caused by the sequential increase of cold source temperature in series design, and ensuring the maximization of ultimate cooling efficiency.

[0025] In summary, this application includes the following beneficial technical effects: 1. This application constructs a tiered, modular cooling system by designing the prime mover cooling module and the generator set cooling module in parallel and independently, supplemented by a final cooling module for centralized heat dissipation. This architecture not only improves upon the limitations of traditional single-cooling systems but also ensures that the cooling of the two power modules does not interfere with each other, enhancing system reliability and maintenance convenience. Simultaneously, each module employs a "dual-purpose" integrated heat exchange mechanism, utilizing the same set of cooling oil circulation pipes to simultaneously meet the cooling needs of both lubricating oil and the outer shell / enclosure, simplifying the piping layout and significantly reducing system complexity and manufacturing costs, while saving valuable installation space on the ship.

[0026] 2. This application uses graphene material with high thermal conductivity for thermal management, which can quickly and evenly conduct and diffuse the heat accumulated on the equipment shell or enclosure to the entire thermally conductive material layer, and finally be efficiently carried away by the cooling oil, thereby improving the heat dissipation efficiency of the prime mover and generator set, and effectively ensuring the performance stability and service life of the equipment under long-term high-load operation.

[0027] 3. A tiered energy management strategy of "intermediate heat exchange with cooling oil + terminal cooling with seawater" is adopted, which fully utilizes the advantages of low internal resistance and precise control of the cooling oil system and the inexhaustible supply of seawater as a cold source. This achieves tiered utilization and efficient transfer of energy, reducing overall operating energy consumption. Simultaneously, the final cooling module uses parallel seawater pipelines to provide a cold source for two independent cooling oil circuits, ensuring physical isolation between the cooling circuits while achieving centralized operation through shared seawater pumps and other equipment. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application; Figure 2 This is a schematic diagram of the prime mover cooling module in this embodiment; Figure 3 This is a schematic diagram of the generator cooling module in this embodiment.

[0029] Reference numerals: 1. Prime mover cooling module; 2. Generator set cooling module; 3. Final cooling module; 4. Prime mover; 5. Prime mover housing; 6. First thermally conductive material layer; 7. Generator set; 8. Generator set enclosure; 9. Second thermally conductive material layer; 10. First seawater circulation pipeline; 11. Seawater pump; 12. Second seawater circulation pipeline; 13. Prime mover cooling oil inlet; 14. Prime mover lubricating oil inlet; 15. First lubricating oil pump; 16. First lubricating oil tank; 17. Prime mover lubricating oil cooling mechanism; 18. First lubricating oil heat exchanger; 19. First cooling oil pump; 20. First 21. Cooling oil tank; 22. First seawater heat exchanger; 23. Prime mover cooling oil circulation pipeline; 24. Prime mover lubricating oil outlet; 25. Prime mover cooling oil outlet; 26. Generator set cooling oil inlet; 27. Generator set lubricating oil inlet; 28. Second lubricating oil pump; 29. ​​Generator set lubricating oil cooling mechanism; 30. Second lubricating oil heat exchanger; 31. Generator set cooling oil circulation pipeline; 32. Second cooling oil pump; 33. Second cooling oil tank; 34. Second seawater heat exchanger; 35. Generator set lubricating oil outlet; 36. Generator set cooling oil outlet. Detailed Implementation

[0030] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0031] This application discloses a marine generator set cooling system for cooling the prime mover 4 and the generator set 7. The prime mover 4 can be a gas turbine, diesel engine, or gasoline engine, etc., and its output mechanical energy is used to drive the generator set 7 to generate electricity. (Refer to...) Figure 1 The marine generator set cooling system includes prime mover cooling module 1, generator set cooling module 2, and final cooling module 3.

[0032] Reference Figure 1 and Figure 2 The prime mover cooling module 1 includes a prime mover lubricating oil cooling mechanism 17 and a prime mover housing cooling mechanism, which are used to cool the prime mover lubricating oil and the prime mover housing 5, respectively; it also includes a first heat exchange mechanism, which uses the prime mover cooling oil circulation as a cold source for the prime mover lubricating oil cooling mechanism 17 and the prime mover housing cooling mechanism.

[0033] Specifically, refer to Figure 2 The prime mover 4 has a prime mover lubricating oil inlet 14 and a prime mover lubricating oil outlet 23 at its two ends, respectively. The prime mover lubricating oil inlet 14 is connected to a first lubricating oil pump 15 and a first lubricating oil tank 16. Driven by the first lubricating oil pump 15, the prime mover lubricating oil in the first lubricating oil tank 16 enters the prime mover 4 from the prime mover lubricating oil inlet 14 to lubricate the components therein, and then the prime mover lubricating oil is output from the prime mover lubricating oil outlet 23.

[0034] Reference Figure 2 The prime mover lubricating oil cooling mechanism 17 includes a first lubricating oil heat exchanger 18, with its two ends connected to a first lubricating oil tank 16 and a prime mover lubricating oil outlet 23, respectively. The hot lubricating oil output from the prime mover lubricating oil outlet 23 enters the first lubricating oil heat exchanger 18 for cooling and then re-enters the first lubricating oil tank 16, thus achieving lubricating oil cooling and circulation.

[0035] Reference Figure 1 and Figure 2 The prime mover housing cooling mechanism includes a first thermally conductive material layer 6 thermally coupled to the prime mover housing 5. The first thermally conductive material layer 6 is a graphene thermally conductive material layer covering the outer wall of the prime mover housing 5. A cooling channel (not shown in the figure) for the flow of prime mover cooling oil is provided inside the first thermally conductive material layer 6. Prime mover cooling oil inlet 13 and prime mover cooling oil outlet 24 are respectively provided at both ends of the prime mover 4, which are respectively connected to the inlet and outlet of the cooling channel in the first thermally conductive material layer 6.

[0036] Reference Figure 1 and Figure 2 The first heat exchange mechanism includes a prime mover cooling oil circulation pipeline 22, the flow path of which is configured to flow through a first lubricating oil heat exchanger 18 and exchange heat with a first thermally conductive material layer 6. Specifically, the prime mover cooling oil circulation pipeline 22 includes a first cooling oil pump 19 and a first cooling oil tank 20; the outlet pipeline of the first cooling oil pump 19 is divided into two paths: one path is connected to the cooling flow channel inlet in the first thermally conductive material layer 6, that is, connected to the prime mover cooling oil inlet 13, and the other path is connected to the first lubricating oil heat exchanger 18.

[0037] Driven by the first cooling oil pump 19, the prime mover cooling oil in the first cooling oil tank 20 is divided into two paths: one path enters the cooling channel in the first thermally conductive material layer 6 to cool the prime mover housing 5, and the other path enters the first lubricating oil heat exchanger 18 to cool the prime mover lubricating oil. The two paths of hot prime mover cooling oil flowing out from the cooling channel in the first thermally conductive material layer 6 and the first lubricating oil heat exchanger 18 merge and flow through the final cooling module 3 for heat exchange.

[0038] Generator cooling module 2 is similar to prime mover cooling module 1, both employing a two-stage cooling architecture, as described above. Figure 1 and Figure 3 The generator set cooling module 2 includes a generator set lubricating oil cooling mechanism 29 and a generator set housing cooling mechanism, which are used to cool the generator set lubricating oil and the generator set housing 8, respectively; it also includes a second heat exchange mechanism, which uses the generator set cooling oil circulation as a cold source for the generator set lubricating oil cooling mechanism 29 and the generator set housing cooling mechanism.

[0039] Specifically, refer to Figure 3 The generator set 7 has a generator set lubricating oil inlet 26 and a generator set lubricating oil outlet 35 at both ends. The generator set lubricating oil inlet 26 is connected to a second lubricating oil pump 27 and a second lubricating oil tank 28. Driven by the second lubricating oil pump 27, the generator set lubricating oil in the second lubricating oil tank 28 enters the generator set 7 from the generator set lubricating oil inlet 26 to lubricate the components, and then the generator set lubricating oil is output from the generator set lubricating oil outlet 35.

[0040] Reference Figure 3 The generator set lubricating oil cooling mechanism 29 includes a second lubricating oil heat exchanger 30, with its two ends connected to a second lubricating oil tank 28 and a generator set lubricating oil outlet 35, respectively. The hot lubricating oil output from the generator set lubricating oil outlet 35 enters the second lubricating oil heat exchanger 30 for cooling and then re-enters the second lubricating oil tank 28, thus achieving lubricating oil cooling and circulation.

[0041] Reference Figure 1 and Figure 3 The generator set enclosure cooling mechanism includes a second thermally conductive material layer 9 thermally coupled to the generator set enclosure 8. The second thermally conductive material layer 9 is a graphene thermally conductive material layer attached to the inner wall of the generator set enclosure. A cooling channel (not shown in the figure) for the flow of generator set cooling oil is provided inside the second thermally conductive material layer 9. Generator set 7 has a generator set cooling oil inlet 25 and a generator set cooling oil outlet 36 at both ends, respectively connected to the inlet and outlet of the cooling channel in the second thermally conductive material layer 9.

[0042] Reference Figure 3The second heat exchange mechanism includes a generator set cooling oil circulation pipeline 31, whose flow path is configured to flow through a second lubricating oil heat exchanger 30 and exchange heat with a second thermally conductive material layer 9. Specifically, the generator set cooling oil circulation pipeline 31 includes a second cooling oil pump 32 and a second cooling oil tank 33; the outlet pipeline of the second cooling oil pump 32 is divided into two paths: one path is connected to the cooling flow channel inlet in the second thermally conductive material layer 9, i.e., connected to the generator set cooling oil inlet 25, and the other path is connected to the second lubricating oil heat exchanger 30.

[0043] Driven by the second cooling oil pump 32, the generator set cooling oil in the second cooling oil tank 33 is divided into two paths: one path enters the cooling channel of the second thermal conductive material layer 9 to cool the generator set housing 8, and the other path enters the second lubricating oil heat exchanger 30 to cool the generator set lubricating oil. The two paths of hot generator set cooling oil flowing out from the cooling channel of the second thermal conductive material layer 9 and the second lubricating oil heat exchanger 30 merge and flow through the final cooling module 3 for heat exchange.

[0044] Reference Figure 1 , Figure 2 and Figure 3 The ultimate cooling module 3 uses seawater as a cold source to cool the prime mover cooling oil and generator set cooling oil. Specifically, the ultimate cooling module 3 includes a first seawater heat exchanger 21, a second seawater heat exchanger 34, and seawater circulation pipes. The two streams of hot prime mover cooling oil flowing from the cooling channels of the first thermally conductive material layer 6 and the first lubricating oil heat exchanger 18 converge and enter the first seawater heat exchanger 21. The prime mover cooling oil exchanges heat with seawater in the first seawater heat exchanger 21, and the cooled prime mover cooling oil re-enters the first cooling oil tank 20. Similarly, the two streams of hot generator set cooling oil flowing from the cooling channels of the second thermally conductive material layer 9 and the second lubricating oil heat exchanger 30 converge and enter the second seawater heat exchanger 34. The generator set cooling oil exchanges heat with seawater in the second seawater heat exchanger 34, and the cooled generator set cooling oil re-enters the second cooling oil tank 33.

[0045] The seawater circulation pipeline is used to provide seawater as a cold source for the first seawater heat exchanger 21 and the second seawater heat exchanger 34. (Refer to...) Figure 1 The seawater circulation pipeline includes a seawater pump 11, whose outlet pipeline is divided into two parallel branches: one branch is connected to the first seawater heat exchanger 21 through the first seawater circulation pipeline 10, and the other branch is connected to the second seawater heat exchanger 34 through the second seawater circulation pipeline 12.

[0046] Seawater pump 11 draws in seawater from the bottom of the ship and pumps it into the first seawater heat exchanger 21 through the first seawater circulation pipeline 10 to provide ultimate cooling for the cooling oil on the prime mover side. At the same time, seawater is pumped into the second seawater heat exchanger 34 through the second seawater circulation pipeline 12 to provide ultimate cooling for the cooling oil on the generator side. The heated seawater after heat exchange is discharged to the outside of the ship from the first seawater heat exchanger 21 and the second seawater heat exchanger 34, respectively.

[0047] The implementation principle of a marine generator cooling system according to an embodiment of this application is as follows: During operation, the heat generated by the prime mover 4 and the generator set 7 is handled by their respective independent cooling modules: On the prime mover side, the cooling oil is divided into two paths, one of which flows through the internal channels of the graphene material layer covering the outer shell to cool the prime mover housing, and the other of which cools the lubricating oil in the lubricating oil heat exchanger. The two hot cooling oils are combined and then subjected to final cooling by seawater; On the generator set side, they operate synchronously in the same mode. The entire cooling system efficiently removes the operating heat of the equipment through multi-stage circulation and heat exchange, ensuring the stable operation of the generator set.

[0048] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A cooling system for a marine generator set, characterized in that: include: The prime mover cooling module includes a prime mover lubricating oil cooling mechanism and a prime mover housing cooling mechanism, which are used to cool the prime mover lubricating oil and the prime mover housing, respectively; it also includes a first heat exchange mechanism, which uses a first cooling medium to circulate as a cold source for the prime mover lubricating oil cooling mechanism and the prime mover housing cooling mechanism. The generator set cooling module includes a generator set lubricating oil cooling mechanism and a generator set housing cooling mechanism, which are used to cool the generator set lubricating oil and the generator set housing respectively; it also includes a second heat exchange mechanism, which uses a second cooling medium to circulate as a cold source for the generator set lubricating oil cooling mechanism and the generator set housing cooling mechanism. The ultimate cooling module uses a third cooling medium as a cold source to cool the first and second cooling media.

2. The marine generator cooling system according to claim 1, characterized in that: The first and second cooling media are both cooling oil, and the third cooling media is seawater.

3. A marine generator cooling system according to claim 2, characterized in that: The prime mover lubricating oil cooling mechanism includes a first lubricating oil heat exchanger, and the prime mover housing cooling mechanism includes a first thermally conductive material layer thermally coupled to the prime mover housing; the first heat exchange mechanism includes a prime mover cooling oil circulation pipeline, the flow path of which is configured to flow through the first lubricating oil heat exchanger and exchange heat with the first thermally conductive material layer.

4. A marine generator cooling system according to claim 3, characterized in that: The first thermally conductive material layer is a graphene thermally conductive material layer, and a cooling channel for the flow of the first cooling medium is provided inside it.

5. A marine generator cooling system according to claim 4, characterized in that: The prime mover cooling oil circulation pipeline includes a first cooling oil pump and a first cooling oil tank; the outlet pipeline of the first cooling oil pump is divided into two paths: one path is connected to the cooling channel in the first thermally conductive material layer, and the other path is connected to the first lubricating oil heat exchanger; the two return oil paths merge and flow through the final cooling module for heat exchange.

6. A marine generator cooling system according to claim 2, characterized in that: The generator set lubricating oil cooling mechanism includes a second lubricating oil heat exchanger, and the generator set housing cooling mechanism includes a second thermally conductive material layer thermally coupled to the generator set housing; the second heat exchange mechanism includes a generator set cooling oil circulation pipeline, the flow path of which is configured to flow through the second lubricating oil heat exchanger and exchange heat with the second thermally conductive material layer.

7. A marine generator cooling system according to claim 6, characterized in that: The second thermally conductive material layer is a graphene thermally conductive material layer, which has cooling channels inside for the flow of the second cooling medium.

8. A marine generator cooling system according to claim 7, characterized in that: The generator set cooling oil circulation pipeline includes a second cooling oil pump and a second cooling oil tank; the outlet pipeline of the second cooling oil pump is divided into two paths: one path is connected to the cooling channel in the second thermally conductive material layer, and the other path is connected to the second lubricating oil heat exchanger; the two return oil paths merge and flow through the final cooling module for heat exchange.

9. A marine generator cooling system according to any one of claims 2-8, characterized in that: The ultimate cooling module includes a first seawater heat exchanger, a second seawater heat exchanger, and a seawater circulation pipeline. The first seawater heat exchanger is used to exchange heat between a first cooling medium and seawater, the second seawater heat exchanger is used to exchange heat between a second cooling medium and seawater, and the seawater circulation pipeline is used to provide seawater as a cold source for the first and second seawater heat exchangers.

10. A marine generator cooling system according to claim 9, characterized in that: The seawater circulation pipeline includes a seawater pump, and its outlet pipeline is divided into two parallel branches: one leads to the first seawater heat exchanger and the other leads to the second seawater heat exchanger.

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