A wind turbine gearbox cooling device

Abstract

The utility model relates to gear box cooling device technical field, concretely relates to a kind of wind power plant fan gear box cooling device, including gear box, heat exchange coil, filtering mechanism, circulating pump and cooling mechanism. By installing heat exchange coil in gear box interior, cooperate the use of heat exchanger and circulating pump, so that cooling water is heat exchanged with lubricating oil in gear box interior, then, after cooling, is sent back to gear box interior again, realize the sustained heat exchange effect in gear box interior, the heat exchange efficiency and timeliness of this kind of heat exchange mode are higher compared with the mode that conventional gear box outside is wound with air pipe or cooling pipe, effectively improve the operation efficiency of cooling device, prolong the service life of gear box interior component. By the basket strainer set in the front end of backwater pipe, impurities in cooling water can be filtered and collected into filter basket, thereby ensuring the long-term stable operation of the cooling system, and the filtering structure is very convenient to clean, simple to operate, ensuring the operation continuity of the equipment.

Description

Technical Field

[0001] This utility model relates to the technical field of gearbox cooling devices, and in particular to a gearbox cooling device for wind turbines in wind farms. Background Technology

[0002] The gearbox of a wind turbine is a core component for transmitting wind energy. During operation, it generates a large amount of heat due to gear meshing and bearing friction, requiring a cooling system to control the lubricating oil temperature and ensure operational stability. Traditional cooling systems often suffer from two problems: firstly, low cooling efficiency and untimely cooling lead to fluctuations in gearbox operating conditions and affect service life; secondly, impurities easily enter the cooling water circulation system, requiring disassembly of the entire device for cleaning, which is cumbersome and inefficient. Therefore, there is an urgent need to design an integrated cooling system that combines high-efficiency cooling, precise temperature control, and convenient filtration to address the pain points of traditional equipment and improve the operational reliability of wind turbines in wind farms.

[0003] The prior art patent publication number CN219994353U discloses a wind turbine gearbox cooling device for a wind farm. The wind turbine gearbox cooling device includes a cooling device body, a stirring mechanism, a condenser, and a control mechanism. The cooling device body includes a cooling pipe, a water tank, and a heat-conducting component. The cooling pipe is wound around the wind turbine gearbox, and both ends of the cooling pipe are connected to the water tank. The heat-conducting component is located between the cooling pipe and the wind turbine gearbox and is connected to the wind turbine gearbox and the cooling pipe. Part of the stirring mechanism is located inside the water tank. The condenser is connected to the water tank. The control mechanism is electrically connected to the stirring mechanism and the condenser.

[0004] However, since this device primarily relies on water pipes wrapped around the outer surface of the gearbox for heat exchange, the actual contact area between this method and the gearbox is limited. To ensure strength, the gearbox housing typically has a certain thickness (mostly metal), which itself represents a significant thermal resistance. Even with excellent external water pipe cooling, heat cannot quickly penetrate the housing wall, resulting in persistent high internal temperatures that could lead to gear and bearing failure due to overheating. Furthermore, the cooling water lacks convenient filtration, easily causing pipe blockage and reduced heat exchange efficiency. Therefore, we propose a wind turbine gearbox cooling device for wind farms. This device solves the problems of low heat exchange efficiency and lack of cooling water filtration, improving heat exchange performance and timely gearbox cooling, thereby extending the service life of internal components. In addition, the added filtration system improves the cleanliness of the cooling water, ensuring long-term stable operation of the heat exchange system. Utility Model Content

[0005] The purpose of this invention is to provide a cooling device for wind turbine gearboxes in wind farms, which solves the problems of low heat exchange efficiency and lack of cooling water filtration in existing devices mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a wind turbine gearbox cooling device for a wind farm, comprising a gearbox, a heat exchange coil, a filter mechanism, a circulating pump, and a cooling mechanism. The heat exchange coil is fixedly installed inside the gearbox, the inlet of the heat exchange coil is connected to the outlet of the cooling mechanism, the outlet of the circulating pump is connected to the inlet of the cooling mechanism, and the filter mechanism is installed between the outlet of the heat exchange coil and the circulating pump.

[0007] The filtration mechanism includes an on / off valve and a basket filter. The inlet of the on / off valve is connected to the outlet flange of the heat exchange coil, and its outlet is connected to the inlet flange of the basket filter. Both the inlet and outlet of the heat exchange coil extend to the outside of the gearbox. The outlet of the basket filter is connected to the top flange of the return water pipe.

[0008] The basket filter includes a filter cartridge, a filter basket, and a cover. Hanging rods are fixedly installed on both sides of the filter basket. The top of the hanging rods is fixedly installed at the bottom of the cover. The cover is connected and fixed to the flange of the filter cartridge. A sealing ring is provided between the cover and the top of the filter cartridge to ensure the airtightness of the interface.

[0009] The cooling mechanism includes a heat exchanger, an inlet pipe, an outlet pipe, and a thermostat. The thermostat is fixedly installed on the outside of the outlet pipe. The top end of the inlet pipe is fixedly connected to the inlet of the heat exchanger, and the bottom end of the outlet pipe is fixedly connected to the outlet of the heat exchanger.

[0010] The bottom end of the return water pipe is connected to the inlet flange of the circulating pump, and the outlet of the circulating pump is fixedly connected to the bottom end of the inlet pipe.

[0011] The gearbox has a base box fixedly installed on its bottom side. The heat exchanger and the circulating pump are fixedly installed on the side wall of the base box. A PLC controller is embedded in the side wall of the base box. The PLC controller controls the opening and closing of the circulating pump and the heat exchanger and is connected to the temperature controller by electrical signal to monitor the water temperature in the outlet pipe.

[0012] This utility model discloses a cooling device for a wind turbine gearbox in a wind farm. By installing heat exchange coils inside the gearbox, in conjunction with a heat exchanger and a circulating pump, the cooling water exchanges heat with the lubricating oil inside the gearbox, then cools down through the heat exchanger and is returned to the gearbox, achieving a continuous heat exchange effect inside the gearbox. Compared to the conventional method of wrapping air ducts or cooling pipes around the outside of the gearbox, this heat exchange method has higher efficiency and timeliness, effectively improving the operating efficiency of the cooling device and extending the service life of the internal components of the gearbox. A basket filter installed at the front end of the return water pipe can filter and collect impurities in the cooling water, thus ensuring the long-term stable operation of the cooling system. This filter structure is also very easy to clean and simple to operate, ensuring the continuous operation of the equipment. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the internal structure of the gearbox of this utility model; Figure 3 This is a schematic diagram of the basket filter structure of this utility model; Figure 4 This utility model Figure 1 A magnified structural diagram of A in the diagram.

[0015] In the diagram: 1. Gearbox; 2. Heat exchange coil; 3. Cooling mechanism; 4. Circulating pump; 5. Filtration mechanism; 6. On / off valve; 7. Basket filter; 8. Return water pipe; 9. Filter cartridge; 10. Filter basket; 11. Cover; 12. Hanger rod; 13. Sealing ring; 14. Heat exchanger; 15. Inlet water pipe; 16. Outlet water pipe; 17. Thermostat; 18. Base box; 19. PLC controller. Detailed Implementation

[0016] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0017] The first embodiment of this application is as follows: Please see Figure 1 - Figure 3This embodiment of a wind turbine gearbox cooling device includes a gearbox 1, a heat exchange coil 2, a circulating pump 4, and a cooling mechanism 3. The heat exchange coil 2 is fixedly installed inside the gearbox 1. The inlet of the heat exchange coil 2 is connected to the outlet of the cooling mechanism 3. The outlet of the circulating pump 4 is connected to the inlet of the cooling mechanism 3. The cooling mechanism 3 includes a heat exchanger 14, an inlet pipe 15, an outlet pipe 16, and a thermostat 17. The thermostat 17 is fixedly installed outside the outlet pipe 16. The top end of the inlet pipe 15 is fixedly connected to the inlet of the heat exchanger 14, and the bottom end of the outlet pipe 16 is fixedly connected to the outlet of the heat exchanger 14. The bottom end of the return pipe 8 is connected to the flange of the inlet of the circulating pump 4, and the outlet of the circulating pump 4 is fixedly connected to the bottom end of the inlet pipe 15. A base box 18 is fixedly installed on the bottom side of the gearbox 1. The heat exchanger 14 and the circulating pump 4 are fixedly installed on the side wall of the base box 18. A PLC controller 19 is embedded in the side wall of the base box 18. The PLC controller 19 controls the opening and closing of the heat exchanger 14 and the circulating pump 4, and is electrically connected to the temperature controller 17 to monitor the water temperature in the outlet pipe 16.

[0018] With the above scheme, when the cooling device is working, the circulating pump 4 starts, driving the coolant to circulate within the system. The heat exchange coil 2 inside the gearbox 1 absorbs the heat from the gearbox operation, and the heated coolant flows into the circulating pump 4 through the return water pipe 8. Then, the circulating pump 4 pumps the coolant into the inlet pipe 15 of the cooling mechanism 3, and into the heat exchanger 14 for cooling. The cooled coolant is then transported back to the heat exchange coil 2 through the outlet water pipe 16, completing the circulation. The temperature controller 17 on the outlet water pipe 16 monitors the water temperature in real time and transmits the signal to the PLC controller 19 on the base box 18. Based on the water temperature data, the PLC controller 19 automatically controls the operating status of the heat exchanger 14 and the circulating pump 4 to ensure that the temperature of the gearbox 1 remains stable within a reasonable range.

[0019] The second embodiment of this application is as follows: Please see Figure 1 - Figure 2 Based on the first embodiment, the wind turbine gearbox cooling device of this embodiment further includes a filtration mechanism 5. The filtration mechanism 5 is installed between the outlet of the heat exchange coil 2 and the circulating pump 4. The filtration mechanism 5 includes an on / off valve 6 and a basket filter 7. The inlet of the on / off valve 6 is connected to the outlet flange of the heat exchange coil 2, and its outlet is connected to the inlet flange of the basket filter 7. Both the inlet and outlet of the heat exchange coil 2 extend to the outside of the gearbox 1. The outlet of the basket filter 7 is connected to the top flange of the return water pipe 8. The basket filter 7 includes a filter cylinder 9, a filter basket 10, and a cover 11. Hangers 12 are fixedly installed on both sides of the filter basket 10. The top of the hangers 12 is fixedly installed at the bottom of the cover 11. The cover 11 is fixedly connected to the flange of the filter cylinder 9. A sealing ring 13 is provided between the cover 11 and the top of the filter cylinder 9.

[0020] Through the above scheme, the cooling device adds a filter mechanism 5, further optimizing the circulation system. The outlet of the heat exchange coil 2 extends to the outside of the gearbox 1 and connects to the inlet flange of the on / off valve 6 of the filter mechanism 5. The outlet flange of the on / off valve 6 connects to the inlet of the basket filter 7, and the outlet of the basket filter 7 is connected to the circulating pump 4 through the return water pipe 8. In the basket filter 7, the hangers 12 on both sides of the filter basket 10 are fixed to the bottom of the cover 11. The cover 11 is connected to the flange of the filter cylinder 9, and a sealing ring 13 is provided between them to prevent leakage. After the coolant flows out from the heat exchange coil 2, it enters the basket filter 7 through the on / off valve 6. The filter basket 10 intercepts impurities, and the filtered liquid enters the circulating pump 4 through the return water pipe 8, avoiding impurities from clogging subsequent components and improving system stability. This filtration structure not only effectively ensures the stable operation of the cooling system and avoids pipe blockage, improving heat exchange efficiency, but also makes the structure very convenient to clean, thereby reducing the adverse effects on equipment operation.

[0021] Working principle: During operation, the heat exchanger 14 and circulating pump 4 are activated via PLC controller 19. Cooling water in the heat exchange coil 2 circulates through circulating pump 4. After entering the gearbox 1 for heat exchange, the cooling water is pumped into the inlet pipe 15 of the heat exchanger 14 by circulating pump 4, then flows into the heat exchanger 14 for cooling. Finally, it flows back into the heat exchange coil 2 through outlet pipe 16 to cool the lubricating oil inside the gearbox 1. During operation, the temperature controller 17 monitors the water temperature in outlet pipe 16 in real time and feeds it back to the PLC controller 19. When the temperature is below a set threshold, the heat exchanger 14 is shut off; when the temperature is above the set threshold, the heat exchanger 14 is turned on. Furthermore, before entering the return pipe 8, the circulating cooling water in the pipes can be filtered for impurities by the filter basket 10 installed in the basket filter 7. After a period of use, the filter basket 10 can be removed by opening the cover 11 for cleaning, eliminating the need to disassemble the entire device and making operation more convenient.

[0022] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that all or part of the processes for implementing the above embodiments and equivalent changes made in accordance with the claims of this application still fall within the scope of this application.

Claims

1. A wind turbine gearbox cooling device for a wind farm, comprising a gearbox (1), a heat exchange coil (2), a filter mechanism (5), a circulating pump (4), and a cooling mechanism (3), characterized in that: The heat exchange coil (2) is fixedly installed inside the gearbox (1). The inlet of the heat exchange coil (2) is connected to the outlet of the cooling mechanism (3). The outlet of the circulating pump (4) is connected to the inlet of the cooling mechanism (3). The filter mechanism (5) is installed between the outlet of the heat exchange coil (2) and the circulating pump (4).

2. The wind turbine gearbox cooling device for a wind farm according to claim 1, characterized in that: The filtration mechanism (5) includes an on / off valve (6) and a basket filter (7). The inlet of the on / off valve (6) is connected to the outlet flange of the heat exchange coil (2), and its outlet is connected to the inlet flange of the basket filter (7). The inlet and outlet of the heat exchange coil (2) extend to the outside of the gearbox (1). The outlet of the basket filter (7) is connected to the top flange of the return water pipe (8).

3. The wind turbine gearbox cooling device for a wind farm according to claim 2, characterized in that: The basket filter (7) includes a filter cartridge (9), a filter basket (10) and a cover (11). The filter basket (10) is fixedly provided with a hanger (12) on both sides. The top of the hanger (12) is fixedly installed at the bottom of the cover (11). The cover (11) is connected and fixed to the flange of the filter cartridge (9). A sealing ring (13) is provided between the cover (11) and the top of the filter cartridge (9).

4. The wind turbine gearbox cooling device for a wind farm according to claim 1, characterized in that: The cooling mechanism (3) includes a heat exchanger (14), an inlet pipe (15), an outlet pipe (16), and a thermostat (17). The thermostat (17) is fixedly installed on the outside of the outlet pipe (16). The top end of the inlet pipe (15) is fixedly connected to the inlet of the heat exchanger (14), and the bottom end of the outlet pipe (16) is fixedly connected to the outlet of the heat exchanger (14).

5. A wind turbine gearbox cooling device for a wind farm according to claim 2, characterized in that: The bottom end of the return water pipe (8) is connected to the inlet flange of the circulating pump (4), and the outlet of the circulating pump (4) is fixedly connected to the bottom end of the inlet pipe (15).

6. A wind turbine gearbox cooling device for a wind farm according to claim 4, characterized in that: The gearbox (1) is fixedly provided with a base box (18) on the bottom side. The heat exchanger (14) and the circulating pump (4) are fixedly installed on the side wall of the base box (18). A PLC controller (19) is embedded in the side wall of the base box (18).

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