Small-size diesel generator with multi-stage cooling structure

Abstract

The utility model discloses a small-volume diesel generator with a multi-stage cooling structure, which comprises a base, a cabinet body is arranged on the base, a generator body is arranged in the cabinet body and comprises a cooling shell and a diesel engine body arranged in the cooling shell, a generator set is arranged on the diesel engine body, and the generator set is connected with the cabinet body. A cooling inner shell is arranged in the generator set, a first water inlet pipe and a first water outlet pipe are arranged on the base, a seawater circulating device is arranged on one side of the generator body and connected with the first water inlet pipe and the first water outlet pipe, and a second water inlet pipe and a second water outlet pipe are further connected to the seawater circulating device. The second water inlet pipe is connected with the cooling outer shell, the cooling outer shell is further connected with a third water inlet pipe, and the third water inlet pipe and the second water outlet pipe are both communicated with the cooling inner shell. According to the utility model, the whole diesel generator is fully cooled, the cooling efficiency is effectively improved, and the influence on the performance or the service life caused by partial overheating is prevented.

Description

Technical Field

[0001] This utility model relates to the field of diesel generator technology, and in particular to a small-volume diesel generator with a multi-stage cooling structure. Background Technology

[0002] A diesel generator is a device that uses diesel fuel to drive an engine, which in turn powers a generator to produce electricity. It is widely used in various types of ships to power onboard systems such as lighting, navigation, communication, and air conditioning, and can also serve as an emergency backup power source. This equipment is characterized by corrosion resistance, quick start-up, and stable operation, and can adapt to the high humidity and high salinity conditions of the marine environment, making it a crucial power source for ensuring the normal operation of ships.

[0003] Some existing diesel generators use a water-cooled structure, but they usually only have a single water-cooled outer shell. The coolant cannot directly contact the core high-heat components such as the generator set. The heat conduction path is long and inefficient, which can easily lead to excessive local temperature rise. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a small-volume diesel generator with a multi-stage cooling structure, which realizes full cooling of the diesel generator as a whole, effectively improves cooling efficiency, and prevents performance or lifespan from being affected by partial overheating.

[0005] To solve the above-mentioned technical problems, this utility model provides a small-volume diesel generator with a multi-stage cooling structure, including a base, a generator body on the base, the generator body including a cooling shell and a diesel engine body disposed within the cooling shell, a generator set on the diesel engine body, a cooling inner shell inside the generator set, and coolant contained in the cooling inner shell, a first water inlet pipe and a first water outlet pipe on the base, a seawater circulation device on one side of the generator body, the seawater circulation device being connected to the first water inlet pipe and the first water outlet pipe, a second water inlet pipe and a second water outlet pipe being connected to the seawater circulation device, the second water inlet pipe being connected to the cooling shell, a third water inlet pipe being connected to the cooling shell, the third water inlet pipe and the second water outlet pipe both communicating with the cooling inner shell, and the coolant in the cooling inner shell entering the cooling shell through the third water inlet pipe.

[0006] The diesel engine body is connected to a fuel pipe, and the fuel pipe is connected to a return fuel pipe. The generator set includes a stator and a flywheel rotor, and the diesel engine body drives the flywheel rotor to rotate.

[0007] The flywheel rotor is sleeved outside the stator, and magnetic tiles are provided on the inner wall of the flywheel rotor. The magnetic tiles surround the outer periphery of the stator, and the cooling inner shell is located at the center of the stator.

[0008] The seawater circulation device includes a heat exchange shell. The upper end of the heat exchange shell is provided with a first water inlet. A second water outlet, a second water inlet, and a first water outlet are sequentially provided on one side of the heat exchange shell. The first water inlet is connected to the first water inlet pipe, the first water outlet is connected to the first water outlet pipe, the second water inlet is connected to the second water inlet pipe, and the second water outlet is connected to the second water outlet pipe.

[0009] The heat exchange housing is provided with a heat exchange chamber, and the heat exchange chamber is provided with a heat exchange part. The first water inlet and the first water outlet are connected to the heat exchange chamber, and the second water inlet and the second water outlet are connected to the heat exchange part.

[0010] The heat exchange section contains multiple overlapping and interlocking heat-conducting plates.

[0011] An air intake pipe is connected to the cooling housing, a muffler is provided on the cooling housing, and an exhaust pipe is connected to the muffler.

[0012] A pressure relief pipe is provided between the first water inlet pipe and the first water outlet pipe, and the pressure relief pipe is connected to the air inlet pipe.

[0013] A drain pipe is connected to the third water inlet pipe.

[0014] When using this invention, the generator body is first ignited and started. The diesel engine body uses diesel combustion as energy, converting chemical energy into mechanical energy, which drives the flywheel rotor to rotate. The magnetic tiles on the flywheel rotor generate a strong rotating magnetic field on the outer periphery of the stator. Through the principle of electromagnetic induction, the stator converts mechanical energy into electrical energy. The generator body generates a large amount of heat when operating at high efficiency, which is dissipated by coolant. The coolant first cools the generator set in the cooling inner shell, and then enters the cooling outer shell through the third water inlet pipe for a second cooling. Then it enters the heat exchange section of the seawater circulation device through the second water inlet pipe. External cold water flows into the heat exchange chamber of the seawater circulation device from the first water inlet pipe. After the external cold water exchanges heat with the coolant, it flows out from the first water outlet pipe. The purified coolant flows back to the cooling inner shell through the second water inlet pipe to achieve water-cooled heat circulation.

[0015] The beneficial effects of this utility model are:

[0016] This invention achieves full cooling of the entire diesel generator, effectively improving cooling efficiency and preventing performance or lifespan from being affected by partial overheating.

[0017] This invention employs a heat exchange method between coolant and external cold water, allowing the internal coolant to circulate within a closed system, thus saving energy and reducing operating costs.

[0018] This utility model features a compact cooling pipe layout and a reasonable structural design, effectively solving the problems of limited space and difficult heat dissipation in generators. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model.

[0020] Figure 2 This is a structural schematic diagram of the present invention from another angle.

[0021] Figure 3 This is an exploded view of this practical generator set.

[0022] Figure 4 This is a cross-sectional view of this practical seawater circulation device.

[0023] In the diagram: 1. Base; 2. Generator body; 3. Cooling shell; 4. Diesel engine body; 5. Generator set; 6. Cooling inner shell; 7. First water inlet pipe; 8. First water outlet pipe; 9. Seawater circulation device; 10. Second water inlet pipe; 11. Second water outlet pipe; 12. Third water inlet pipe; 13. Fuel pipe; 14. Oil return pipe; 15. Stator; 16. Flywheel rotor; 17. Magnet; 18. Heat exchange shell; 19. First water inlet; 20. Second water outlet; 21. Second water inlet; 22. First water outlet; 23. Heat exchange chamber; 24. Heat exchange section; 25. Heat conduction plate; 26. Air inlet pipe; 27. Muffler; 28. Exhaust pipe; 29. ​​Pressure relief pipe; 30. Drain pipe. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0025] according to Figures 1 to 4As shown, this utility model discloses a small-volume diesel generator with a multi-stage cooling structure, including a base 1. A generator body 2 is mounted on the base 1. The generator body 2 includes a cooling shell 3 and a diesel engine body 4 housed within the cooling shell 3. A generator set 5 is mounted on the diesel engine body 4, and a cooling inner shell 6 is located within the generator set 5. A first water inlet pipe 7 and a first water outlet pipe 8 are mounted on the base 1 for the introduction and discharge of external water, respectively. A seawater circulation device 9 is located on one side of the generator body 2, connected to the first water inlet pipe 7 and the first water outlet pipe 8. A second water inlet pipe 10 and a second water outlet pipe 11 are also connected to the seawater circulation device 9. The second water inlet pipe 10 is connected to the cooling shell 3, and a third water inlet pipe 12 is connected to the cooling shell 3. Both the third water inlet pipe 12 and the second water outlet pipe 11 are connected to the cooling inner shell 6. The second water outlet pipe 11 is positioned after the air intake pipe 26, and the second water inlet pipe 10 is positioned after the second water outlet pipe 11, arranged in a front-to-back sequence, making the cooling system more compact and the layout more scientific.

[0026] The diesel engine body 4 is connected to a fuel pipe 13 for fuel supply, and a return fuel pipe 14 is also connected to the fuel pipe 13 to achieve fuel circulation and improve fuel efficiency. The generator set 5 adopts a structure combination of stator 15 and flywheel rotor 16. The diesel engine body 4 generates electricity by mechanically driving the flywheel rotor 16 to rotate. The flywheel rotor 16 is sleeved on the outside of the stator 15, and its inner wall is provided with uniformly distributed magnetic tiles 17. The magnetic tiles 17 are arranged in a ring around the outer periphery of the stator 15 to achieve stable magnetic induction power generation. In order to ensure the thermal balance inside the generator, the cooling inner shell 6 is located at the center of the stator 15 to directly cool the core of the stator 15.

[0027] The seawater circulation device 9 includes a heat exchange shell 18. A first inlet 19 is located at the upper end of the heat exchange shell 18. A second outlet 20, a second inlet 21, and a first outlet 22 are sequentially located on one side of the heat exchange shell 18. The first inlet 19 is connected to a first inlet pipe 7, the first outlet 22 is connected to a first outlet pipe 8, the second inlet 21 is connected to a second inlet pipe 10, and the second outlet 20 is connected to a second outlet pipe 11. A heat exchange chamber 23 is located inside the heat exchange shell 18, and a heat exchange section 24 is located within the heat exchange chamber 23. The first inlet 19 and the first outlet 22 communicate with the heat exchange chamber 23, and the second inlet 21 and the second outlet 20 communicate with the heat exchange section 24. Multiple overlapping and interconnected heat-conducting plates 25 are arranged inside the heat exchange section 24, significantly improving heat transfer efficiency during coolant flow.

[0028] In addition, an air inlet pipe 26 is connected to the cooling housing 3, which can be connected to an external air-cooled heat dissipation system. A muffler 27 is also installed to reduce operating noise. The muffler 27 is connected to an exhaust pipe 28 to expel gas without interfering with internal airflow. To further enhance system safety, a pressure relief pipe 29 is installed between the first water inlet pipe 7 and the first water outlet pipe 8. This pressure relief pipe 29 connects to the air inlet pipe 26 and is used to release pressure in a timely manner when abnormal pressure occurs in the water circuit, preventing system overload. A drain pipe 30 is installed on the third water inlet pipe 12 to facilitate the drainage of residual liquid when the equipment is shut down for maintenance or coolant replacement.

[0029] When this utility model is in use, the generator body 2 is first ignited and started. The diesel engine body 4 uses diesel combustion as energy to convert chemical energy into mechanical energy, driving the flywheel rotor 16 to rotate. The magnetic tiles 17 on the flywheel rotor 16 generate a strong rotating magnetic field on the outer periphery of the stator 15. Through the principle of electromagnetic induction, the stator 15 converts mechanical energy into electrical energy. When the generator body 2 is operating at high efficiency, it will generate a lot of heat, which is dissipated by coolant. The coolant first cools the generator set 5 in the cooling inner shell 6, and then enters the cooling outer shell 3 through the third water inlet pipe 12 for a second cooling. Then it enters the heat exchange section 24 of the seawater circulation device 9 through the second water inlet pipe 10. External cold water flows into the heat exchange chamber 23 of the seawater circulation device 9 from the first water inlet pipe 7. After the external cold water exchanges heat with the coolant, it flows out from the first water outlet pipe 8. The coolant flows back to the cooling inner shell 6 through the second water inlet pipe 10 to achieve water-cooled heat circulation.

[0030] The beneficial effects of this utility model are:

[0031] This invention achieves full cooling of the entire diesel generator, effectively improving cooling efficiency and preventing performance or lifespan from being affected by partial overheating.

[0032] This invention employs a heat exchange method between coolant and external cold water, allowing the internal coolant to circulate within a closed system, thus saving energy and reducing operating costs.

[0033] This utility model features a compact cooling pipe layout and a reasonable structural design, effectively solving the problems of limited space and difficult heat dissipation in generators.

[0034] The above description is only a preferred embodiment of the present utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. A small-size diesel generator having a multi-stage cooling structure, comprising a base (1) on which a generator main body (2) is provided, characterized in that: The generator body (2) comprises a cooling shell (3) and a diesel engine body (4) arranged in the cooling shell (3), the diesel engine body (4) is provided with a generator set (5), the generator set (5) is provided with a cooling inner shell (6), the cooling inner shell (6) contains cooling liquid, the base (1) is provided with a first water inlet pipe (7) and a first water outlet pipe (8), one side of the generator body (2) is provided with a seawater circulating device (9), the seawater circulating device (9) is connected with the first water inlet pipe (7) and the first water outlet pipe (8), the seawater circulating device (9) is further connected with a second water inlet pipe (10) and a second water outlet pipe (11), the second water inlet pipe (10) is connected with the cooling shell (3), the cooling shell (3) is further connected with a third water inlet pipe (12), the third water inlet pipe (12) and the second water outlet pipe (11) are both communicated with the cooling inner shell (6), the cooling liquid in the cooling inner shell (6) enters the cooling shell (3) through the third water inlet pipe (12).

2. The small-size diesel generator having a multi-stage cooling structure according to claim 1, characterized by: The diesel engine body (4) is connected with a fuel pipe (13), the fuel pipe (13) is connected with an oil return pipe (14), the generator set (5) comprises a stator (15) and a flywheel rotor (16), the diesel engine body (4) drives the flywheel rotor (16) to rotate.

3. A small volume diesel generator having a multi-stage cooling structure according to claim 2, characterized in that: The flywheel rotor (16) is sleeved outside the stator (15), the inner wall of the flywheel rotor (16) is provided with a magnetic shoe (17), the magnetic shoe (17) surrounds the outer periphery of the stator (15), and the cooling inner shell (6) is arranged at the center of the stator (15).

4. The small-size diesel generator having a multi-stage cooling structure according to claim 1, characterized by: The seawater circulating device (9) comprises a heat exchange shell (18), the heat exchange shell (18) is provided with a first water inlet (19) at the upper end, a second water outlet (20), a second water inlet (21) and a first water outlet (22) are sequentially arranged on one side of the heat exchange shell (18), the first water inlet (19) is connected with the first water inlet pipe (7), the first water outlet (22) is connected with the first water outlet pipe (8), the second water inlet (21) is connected with the second water inlet pipe (10), and the second water outlet (20) is connected with the second water outlet pipe (11).

5. A small volume diesel generator having a multi-stage cooling arrangement according to claim 4, characterised in that: The heat exchange shell (18) is provided with a heat exchange cavity (23) and a heat exchange part (24) in the heat exchange cavity (23), the first water inlet (19) and the first water outlet (22) are communicated with the heat exchange cavity (23), and the second water inlet (21) and the second water outlet (20) are communicated with the heat exchange part (24).

6. A small volume diesel generator having a multi-stage cooling arrangement according to claim 5, characterised in that: A plurality of heat-conducting plates (25) which are overlapped and jointed with each other are arranged in the heat exchange part (24).

7. The small volume diesel generator having a multi-stage cooling structure according to claim 1, characterized by: The cooling shell (3) is connected with an air inlet pipe (26), the cooling shell (3) is provided with a silencer (27), and the silencer (27) is connected with an air outlet pipe (28).

8. A small volume diesel generator having a multi-stage cooling arrangement according to claim 7, characterised in that: A pressure relief pipe (29) is arranged between the first water inlet pipe (7) and the first water outlet pipe (8), and the pressure relief pipe (29) is communicated with the air inlet pipe (26).

9. The small volume diesel generator having a multi-stage cooling structure according to claim 1, characterized by: A drain pipe (30) is connected with the third water inlet pipe (12).

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