A kind of double-fed unit gear box transmission efficiency promotion optimization component
Patent Information
- Application Number
- CN202522653882.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-15
- Publication Date
- 2026-09-25
- Estimated Expiration
- 2035-12-15
AI Technical Summary
[0003]现有技术中，齿轮箱作为传动链的核心动力传递部件，其传动效率与工作温度密切相关，在低风速、高瞬变负载的复杂工况下，齿轮箱面临严峻的热管理挑战，在严寒环境下启动或低功率运行时，齿轮箱内部润滑油粘度急剧增大，流动性变差，导致轴承与齿轮啮合面处于边界润滑甚至干摩擦状态，这不仅造成巨大的启动阻力与功率损耗，严重降低传动效率，更会引发严重的磨损，威胁设备安全，在捕捉瞬变高风速或夏季持续运行时，齿轮箱因负载增大而发热量陡增，若散热不足，润滑油温度将迅速升高，导致油膜强度下降、基础油氧化加速、添加剂失效，过热会引发润滑油粘度异常降低，润滑性能衰退，同样会增大机械摩擦损耗，传动效率下降，并最终导致齿轮与轴承的胶合、点蚀等永久性损伤
通过加热丝、加热架、温度传感器、双馈机组齿轮箱本体、微型风扇、流通孔和第一连续管相互配合使用，可以实现低温环境下对齿轮箱内部进行主动、快速、均匀的加热，保障机组在严寒条件下的正常启动与运行，防止因油液凝固或粘度过大导致的润滑失效与传动效率下降，直接提升机组在低温环境的适应性与发电可利用率。
Smart Images
Figure CN224800935U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of wind power technology, specifically to a component for improving and optimizing the transmission efficiency of a doubly fed turbine gearbox. Background Technology
[0002] As wind power development extends into complex environments such as low wind speeds and high turbulence, the wind energy capture efficiency and long-term operational reliability of wind turbines, especially doubly-fed induction generators (DFIGs), in low-wind-speed areas have become core bottlenecks restricting their economic viability. To improve power generation performance at low wind speeds, current research focuses on optimizing electrical topology and control strategies to expand the effective speed range of the turbine, enabling grid connection and tracking of the optimal tip speed ratio at even lower wind speeds. However, this performance improvement path places more stringent demands on the long-term stable and efficient operation of the drivetrain, especially the gearbox.
[0003] In existing technologies, gearboxes, as the core power transmission component of the transmission chain, have transmission efficiency closely related to operating temperature. Under complex operating conditions of low wind speed and high transient load, gearboxes face severe thermal management challenges. When starting in cold environments or running at low power, the viscosity of the lubricating oil inside the gearbox increases sharply, and its fluidity deteriorates, causing the meshing surfaces of bearings and gears to be in a state of boundary lubrication or even dry friction. This not only causes huge starting resistance and power loss, severely reducing transmission efficiency, but also causes serious wear and threatens equipment safety. When capturing transient high wind speeds or running continuously in summer, the gearbox generates a sharp increase in heat due to increased load. If heat dissipation is insufficient, the lubricating oil temperature will rise rapidly, leading to a decrease in oil film strength, accelerated oxidation of base oil, and failure of additives. Overheating will cause an abnormal decrease in lubricating oil viscosity and a decline in lubrication performance, which will also increase mechanical friction loss, reduce transmission efficiency, and ultimately lead to permanent damage such as scuffing and pitting of gears and bearings. Utility Model Content
[0004] To address the shortcomings of existing technologies, this utility model provides a component for improving and optimizing the transmission efficiency of a doubly fed generator gearbox.
[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: A component for improving and optimizing the transmission efficiency of a doubly-fed generator (DFG) gearbox includes: a doubly-fed generator gearbox body, with constant temperature holes on both sides of the gearbox body; a heating component disposed on the right side of the gearbox body, the heating component including: a heating frame fixedly installed inside the constant temperature holes on the right side; a first operating frame fixedly installed on the right side of the gearbox body, the heating frame being fixedly installed with the first operating frame; several ventilation holes on one side of the first operating frame; a miniature fan fixedly fitted inside the first operating frame; a first continuous pipe fixedly installed inside the first operating frame, located between the first operating frame and the heating frame; a heating plate fixedly installed inside the heating frame, with several flow holes on one side of the heating plate; and a heating wire fixedly installed inside the heating plate; a cooling component disposed on the left side of the gearbox body.
[0006] To dissipate heat from the interior of the doubly-fed generator gearbox, as a preferred embodiment of this utility model for improving and optimizing the transmission efficiency of the doubly-fed generator gearbox, the cooling component includes: a second operating frame, which is fixedly installed on the left side of the doubly-fed generator gearbox; a cooling fan is fixedly fitted inside the second operating frame; several ventilation holes are opened on one side of the interior of the second operating frame; a second continuous pipe is fixedly installed inside the second operating frame; a heat-conducting frame is fixedly installed inside the second operating frame; the second continuous pipe is fixedly installed with the heat-conducting frame; and the heat-conducting frame is fixedly installed inside the constant temperature hole located on the left side.
[0007] To achieve coolant circulation, as a component for improving and optimizing the transmission efficiency of a doubly fed turbine gearbox according to this utility model, preferably, a circulation shell and a cooling shell are fixedly installed on the top surface of the doubly fed turbine gearbox body, respectively. A first inlet pipe and a first outlet pipe are fixedly sleeved at both ends of the first continuous pipe, respectively, passing through both sides of the first operating frame. A second inlet pipe and a second outlet pipe are fixedly installed at both ends of the second continuous pipe, respectively, passing through both sides of the second operating frame. The second outlet pipe and the first outlet pipe pass through both sides of the circulation shell. The first inlet pipe and the second inlet pipe pass through both sides of the cooling shell. A micro water pump is fixedly installed on the top surface of the doubly fed turbine gearbox body. A connecting pipe is fixedly sleeved on the outer circular wall of the micro water pump inlet, the connecting pipe being fixedly connected to the circulation shell and passing through one side of the circulation shell. A circulation pipe is fixedly sleeved on the outer circular wall of the micro water pump outlet, the circulation pipe passing through one side of the cooling shell.
[0008] In order to determine the constant temperature inside the doubly fed generator gearbox, as a component for improving and optimizing the transmission efficiency of the doubly fed generator gearbox according to this utility model, preferably, temperature sensors are fixedly installed on one side of the first operating frame and the second operating frame respectively, and the detection end of the temperature sensor passes through one side of the doubly fed generator gearbox.
[0009] In order to improve the heat dissipation effect of the coolant with temperature, as a component for improving and optimizing the transmission efficiency of the doubly fed turbine gearbox of this utility model, preferably, the internal circulation shell is rotatably connected to a rotating column, and several blades are fixedly installed on the outer circular wall of the rotating column.
[0010] In order to discharge the water vapor generated inside the doubly fed turbine gearbox, as a component for improving and optimizing the transmission efficiency of the doubly fed turbine gearbox of this utility model, preferably, the top surface of the circulation shell is provided with several heat exhaust holes, the inside of the heat exhaust holes is fixedly fitted with a blocking mesh, and the top surface of the doubly fed turbine gearbox is provided with several exhaust holes.
[0011] In summary, the present invention has the following main advantages: By using heating wires, heating frames, temperature sensors, the doubly fed generator gearbox body, micro fans, flow holes, and the first continuous tube in combination, active, rapid, and uniform heating of the gearbox interior can be achieved in low-temperature environments. This ensures the normal start-up and operation of the unit under frigid conditions, prevents lubrication failure and transmission efficiency reduction caused by oil solidification or excessive viscosity, and directly improves the unit's adaptability to low-temperature environments and its power generation availability.
[0012] By using a combination of heat conduction frame, second continuous tube, cooling fan and ventilation holes, efficient and direct forced heat dissipation of the gearbox interior can be achieved under high temperature conditions. This effectively controls the temperature rise of the gearbox under continuous operation or high load, keeps the oil temperature and component temperature within the optimal range, reduces the deterioration of lubrication performance, decrease in mechanical efficiency and thermal stress damage to components caused by high temperature, and ensures long-term reliable operation of the transmission chain. Attached Figure Description
[0013] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is a schematic diagram of the gearbox body structure of the doubly fed generator unit of this utility model; Figure 3 yes Figure 2 Schematic diagram of the cross section of AA; Figure 4 This is a schematic diagram of the second operating frame structure of this utility model; Figure 5 This is a schematic diagram of the first operating frame structure of this utility model; Figure 6 This is a schematic diagram of the heating frame structure of this utility model; Figure 7 This is a schematic diagram of the circulating shell structure of this utility model; Figure 8 This is a schematic diagram of the exhaust port structure of this utility model.
[0014] Reference numerals in the attached drawings: 1. Gearbox body of the doubly-fed generator; 2. Thermostatic port; 3. First operating frame; 4. Miniature fan; 5. Ventilation port; 6. First continuous tube; 7. Heating frame; 8. Heating plate; 9. Flow hole; 10. Heating wire; 11. Second operating frame; 12. Cooling fan; 13. Vent hole; 14. Second continuous tube; 15. Heat conduction frame; 16. Circulation shell; 17. Cooling shell; 18. First water inlet pipe; 19. First water outlet pipe; 20. Second water inlet pipe; 21. Second water outlet pipe; 22. Miniature water pump; 23. Connecting pipe; 24. Circulation pipe; 25. Temperature sensor; 26. Rotating column; 27. Heat exhaust port; 28. Exhaust port. Detailed Implementation
[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0016] Example refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 8 A component for improving and optimizing the transmission efficiency of a doubly fed generator gearbox includes a doubly fed generator gearbox body 1. Constant temperature holes 2 are respectively opened on both sides of the doubly fed generator gearbox body 1. A heating component is provided on the right side of the doubly fed generator gearbox body 1. The heating component includes a heating frame 7, which is fixedly installed inside the constant temperature hole 2 on the right side. A first operating frame 3 is fixedly installed on the right side of the doubly fed generator gearbox body 1. The heating frame 7 and the first operating frame 3 are fixedly installed together. Several ventilation holes 5 are opened on one side of the interior of the first operating frame 3. A miniature fan 4 is fixedly sleeved inside the first operating frame 3. A first continuous pipe 6 is fixedly installed inside the first operating frame 3, located between the first operating frame 3 and the heating frame 7. A heating plate 8 is fixedly installed inside the heating frame 7. Several flow holes 9 are opened on one side of the heating plate 8. A heating wire 10 is fixedly installed inside the heating plate 8. A cooling component is provided on the left side of the doubly fed generator gearbox body 1. The cooling component includes a second operating frame 11, which is fixedly installed on the left side of the doubly fed generator gearbox body 1. A cooling fan 12 is fixedly sleeved inside the second operating frame 11. Several ventilation holes 13 are opened on one side of the inside of the second operating frame 11. A second continuous pipe 14 is fixedly installed inside the second operating frame 11. A heat conduction frame 15 is fixedly installed inside the second operating frame 11. The second continuous pipe 14 and the heat conduction frame 15 are fixedly installed. The heat conduction frame 15 is fixedly installed inside the constant temperature hole 2 located on the left side. To address the temperature drop inside the gearbox caused by winter or low-temperature environments, this system is designed with an integrated electric heating air circulation module. The core of this module is the heating frame 7 with built-in heating wire 10. When the temperature sensor 25 detects that the internal temperature of the doubly fed turbine gearbox body 1 is too low, the heating wire is activated, transferring heat energy to the entire heating frame. At the same time, the micro fan 4 is activated, and the airflow generated by it passes through the heating frame 7 and its flow holes 9, forcibly blowing the uniform hot air generated by the heating wire and the heating frame into the internal space of the gearbox, achieving rapid and active heating, ensuring that the lubricating oil maintains good fluidity and that the components are at a suitable operating temperature. After the heating task is completed, the system can inject coolant into the first continuous pipe 6 that runs through the heating frame to quickly cool the heating module with residual heat, avoiding its inertial heat from affecting the already balanced internal temperature of the gearbox, and actively, quickly and uniformly heating the inside of the gearbox in low-temperature environments. When the internal temperature of the gearbox rises due to high load operation, the system activates the active cooling module via the heat conduction frame 15. This module consists of a heat conduction frame 15 made of high thermal conductivity material, an embedded second continuous pipe 14, and a cooling fan 12. The heat conduction frame 15 directly absorbs the heat from the hot air inside the gearbox. The system pumps coolant into the second continuous pipe 14 to directly remove the heat absorbed by the heat conduction frame. At the same time, the cooling fan 12 operates, enhancing convection through the vents 13 to draw the hot air inside the gearbox to the surface of the heat conduction frame for heat exchange, thereby achieving efficient heat dissipation of the gearbox interior and providing efficient and direct forced cooling of the gearbox interior under high-temperature conditions.
[0017] Based on the above embodiments, refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5The top surface of the doubly fed generator gearbox body 1 is fixedly equipped with a circulation shell 16 and a cooling shell 17. The two ends of the first continuous pipe 6 are respectively fixedly sleeved with a first inlet pipe 18 and a first outlet pipe 19, which pass through both sides of the first operating frame 3. The two ends of the second continuous pipe 14 are respectively fixedly equipped with a second inlet pipe 20 and a second outlet pipe 21, which pass through both sides of the second operating frame 11. The first outlet pipe 19 passes through both sides of the circulation shell 16, the first inlet pipe 18 and the second inlet pipe 20 pass through both sides of the cooling shell 17, a micro water pump 22 is fixedly installed on the top surface of the doubly fed generator gearbox body 1, a connecting pipe 23 is fixedly sleeved on the outer circular wall of the inlet of the micro water pump 22, the connecting pipe 23 is fixedly connected to the circulation shell 16 and passes through one side of the circulation shell 16, a circulation pipe 24 is fixedly sleeved on the outer circular wall of the outlet of the micro water pump 22, and the circulation pipe 24 passes through one side of the cooling shell 17. Temperature sensors 25 are fixedly installed on one side of the first operating frame 3 and the second operating frame 11 respectively, and the detection end of the temperature sensor 25 passes through one side of the doubly fed generator gearbox body 1. An independent closed-loop coolant circulation system is provided through the circulation shell 16, serving both post-heating cooling and high-temperature heat dissipation. The coolant is stored in the cooling shell 17 and, driven by a micro water pump 22, is pumped through the first inlet pipe 18 and the second inlet pipe 20 into the first continuous pipe 6 of the heating module and the second continuous pipe 14 of the cooling module, respectively. After heat exchange, the coolant, carrying heat, flows back to the circulation shell 16 through the first outlet pipe 19 and the second outlet pipe 21. The circulation shell 16 contains a blade and rotating column 26 structure. The flowing hot coolant impacts the blades, causing them to rotate and agitate the liquid inside the shell to enhance heat exchange with the shell wall. To improve natural heat dissipation efficiency, the coolant then returns to the cooling shell 17 via connecting pipe 23 and circulation pipe 24, completing the circulation. This provides a recyclable cooling medium for the heating and cooling modules and enhances the heat dissipation of the cooling medium itself. The start-up, shutdown, and switching logic of the entire system is based on real-time monitoring data from temperature sensor 25 located inside the gearbox. The sensor feeds back the temperature signal inside the gearbox to the main control unit, where the control algorithm determines whether to execute heating, cooling, or standby commands and precisely controls the actions of actuators such as heating wires, micro fans, cooling fans, and micro water pumps. Based on real-time temperature feedback, the constant temperature system is intelligently controlled in a closed loop.
[0018] Based on the above embodiments, refer to Figure 1 , Figure 7 and Figure 8The circulation shell 16 is rotatably connected to a rotating column 26. Several blades are fixedly installed on the outer circular wall of the rotating column 26. Several heat exhaust holes 27 are opened on the top surface of the circulation shell 16. A blocking mesh is fixedly sleeved inside the heat exhaust holes 27. Several exhaust holes 28 are opened on the top surface of the doubly fed unit gearbox body 1. By means of the blades, when the coolant with temperature enters the interior of the circulation shell 16, the coolant will impact the blades and cause the rotating column 26 to rotate, thereby agitating the coolant with temperature inside the circulation shell 16, so as to improve the heat dissipation effect of the coolant with temperature.
[0019] The aforementioned constant-temperature structure can prevent lithium-based grease from dropping from 180°C to 150°C and increasing its cone penetration from 265 to 310 (NLGI2 grade to 3 grade) after long-term high-temperature (>80°C) operation, resulting in grease loss of 15%-20% of the initial amount per year. At this point, bearing friction loss increases by 40%, and the efficiency decline rate accelerates to 0.8% per year.
[0020] Working principle: Please refer to Figures 1-8 As shown, the heating frame 7, when the ambient temperature drops in winter, affects the internal temperature of the doubly-fed generator gearbox 1, causing it to decrease. At this time, the heating wire 10 generates high temperature upon operation, which in turn heats the heating frame 7. This allows the heating wire 10 and the heating frame 7 to dissipate heat inside the doubly-fed generator gearbox 1. Subsequently, the micro fan 4 generates airflow that blows air into the interior of the doubly-fed generator gearbox 1. The force will pass through the heating frame 7, the flow hole 9 and the heating wire 10 and blow into the interior of the doubly fed generator gearbox body 1, so as to facilitate the heat emitted by the heating wire 10 and the heating frame 7 to be blown into the interior of the doubly fed generator gearbox body 1, thereby facilitating the heating of the interior of the doubly fed generator gearbox body 1. After the heating wire 10 raises the temperature of the interior of the doubly fed generator gearbox body 1, the coolant is injected into the interior of the first continuous pipe 6, so as to facilitate the rapid residual heat cooling of the heating wire 10 and the heating frame 7, and prevent the residual heat from affecting the internal temperature of the doubly fed generator gearbox body 1 after the heating wire 10 is turned off.
[0021] When the heat inside the doubly-fed generator gearbox 1 increases, the heat is absorbed by the heat conduction frame 15. At the same time, coolant is injected into the second continuous pipe 14, which facilitates the cooling of the heat absorbed by the heat conduction frame 15. Then, the cooling fan 12 is used to draw air from the inside of the doubly-fed generator gearbox 1 through the ventilation hole 13 and the heat conduction frame 15, which facilitates the cooling of the inside of the doubly-fed generator gearbox 1.
[0022] Through the circulation shell 16, coolant is injected into the cooling shell 17. The coolant then flows into the first continuous pipe 6 and the second continuous pipe 14 through the first inlet pipe 18 and the second inlet pipe 20, respectively, for cooling. After the coolant in the second continuous pipe 14 and the first continuous pipe 6 has completed its cooling process, it will carry away the heat. Then, the coolant in the second continuous pipe 14 and the first continuous pipe 6 will enter the circulation shell 16 through the second outlet pipe 21 and the first outlet pipe 19 for individual cooling. Subsequently, by using the micro water pump 22, the micro water pump 22 will draw out the coolant in the circulation shell 16 through the connecting pipe 23 and discharge it back into the cooling shell 17 through the circulation pipe 24. This process is repeated to achieve coolant circulation.
[0023] The temperature sensor 25 can be used to detect the temperature inside the doubly fed generator gearbox 1, so as to determine the constant temperature inside the doubly fed generator gearbox 1.
[0024] By means of the blades, when the coolant with temperature enters the interior of the circulation shell 16, the coolant will impact the blades and cause the rotating column 26 to rotate, thereby agitating the coolant with temperature inside the circulation shell 16, so as to improve the heat dissipation effect of the coolant with temperature.
[0025] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A component for improving and optimizing the transmission efficiency of a doubly-fed generator gearbox, characterized in that, include: The doubly fed generator gearbox body (1) has constant temperature holes (2) on both sides. A heating assembly is located on the right side of the doubly fed generator gearbox body (1). The heating assembly includes a heating frame (7), which is fixedly installed inside the constant temperature hole (2) on the right side. A first operating frame (3) is fixedly installed on the right side of the doubly fed generator gearbox body (1). The heating frame (7) is fixedly installed with the first operating frame (3). Several ventilation holes (5) are opened on one side of the inside of the first operating frame (3). A miniature fan (4) is fixedly sleeved inside the first operating frame (3). A first continuous pipe (6) is fixedly installed inside the first operating frame (3). The first continuous pipe (6) is located between the first operating frame (3) and the heating frame (7). A heating plate (8) is fixedly installed inside the heating frame (7). Several flow holes (9) are opened on one side of the heating plate (8). A heating wire (10) is fixedly installed inside the heating plate (8). A cooling component is provided on the left side of the doubly fed generator gearbox body (1).
2. The doubly-fed generator gearbox transmission efficiency improvement and optimization component according to claim 1, characterized in that, The cooling component includes: The second operating frame (11) is fixedly installed on the left side of the doubly fed generator gearbox body (1). A cooling fan (12) is fixedly sleeved inside the second operating frame (11). Several ventilation holes (13) are opened on one side of the inside of the second operating frame (11). A second continuous pipe (14) is fixedly installed inside the second operating frame (11). A heat conduction frame (15) is fixedly installed inside the second operating frame (11). The second continuous pipe (14) is fixedly installed with the heat conduction frame (15). The heat conduction frame (15) is fixedly installed inside the constant temperature hole (2) located on the left side.
3. The doubly-fed generator gearbox transmission efficiency improvement and optimization component according to claim 2, characterized in that, The top surface of the doubly fed generator gearbox body (1) is fixedly equipped with a circulation shell (16) and a cooling shell (17). The two ends of the first continuous pipe (6) are respectively fixedly fitted with a first inlet pipe (18) and a first outlet pipe (19). The first inlet pipe (18) and the first outlet pipe (19) pass through both sides of the first operating frame (3). The two ends of the second continuous pipe (14) are respectively fixedly equipped with a second inlet pipe (20) and a second outlet pipe (21). The second inlet pipe (20) and the second outlet pipe (21) pass through both sides of the second operating frame (11). The second outlet pipe (21) and the first... The outlet pipe (19) passes through both sides of the circulation shell (16), the first inlet pipe (18) and the second inlet pipe (20) pass through both sides of the cooling shell (17), a micro water pump (22) is fixedly installed on the top surface of the doubly fed generator gearbox body (1), a connecting pipe (23) is fixedly sleeved on the outer circular wall of the inlet of the micro water pump (22), the connecting pipe (23) is fixedly connected to the circulation shell (16) and passes through one side of the circulation shell (16), a circulation pipe (24) is fixedly sleeved on the outer circular wall of the outlet of the micro water pump (22), and the circulation pipe (24) passes through one side of the cooling shell (17).
4. The doubly-fed generator gearbox transmission efficiency improvement and optimization component according to claim 2, characterized in that, Temperature sensors (25) are fixedly installed on one side of the first operating frame (3) and the second operating frame (11), respectively. The detection end of the temperature sensor (25) passes through one side of the doubly fed generator gearbox body (1).
5. The doubly-fed generator gearbox transmission efficiency improvement and optimization component according to claim 3, characterized in that, The internal rotating connection of the circulation shell (16) is a rotating column (26), and a number of blades are fixedly installed on the outer circular wall of the rotating column (26).
6. The doubly-fed generator gearbox transmission efficiency improvement and optimization component according to claim 3, characterized in that, The top surface of the circulating shell (16) is provided with several heat exhaust holes (27), and a blocking mesh is fixedly sleeved inside the heat exhaust holes (27). The top surface of the doubly fed generator gearbox body (1) is provided with several exhaust holes (28).