Yaw gear ring and brake mechanism of wind driven generator

Abstract

The invention discloses a yaw gear ring and brake mechanism of a wind driven generator, and relates to the field of yaw system application of the wind driven generator, the yaw gear ring and brake mechanism comprises a tower body and a tower cabin, a plurality of groups of hydraulic calipers are mounted at the bottom of the tower cabin, a brake disc is mounted on the inner side of the tower body by arranging a column foot, an embedding groove is formed in the top of the tower body, and an annular frame is mounted in the embedding groove; an annular pipe is embedded in the annular frame, and a plurality of sets of air nozzles are evenly formed in the inner side and the outer side of the annular pipe. The annular frame is arranged on the surface of the brake disc to install the annular pipe, the annular pipe is used for conducting air injection treatment on the surface of the brake disc, a certain heat dissipation effect can be achieved, the risk of thermal deformation of the brake disc caused by friction is reduced, oil dripping on the surface of the brake disc can be blown away through air injection treatment, and the retention time of leaked oil is shortened; and through air injection treatment, fixed particles falling off from the friction plate of the brake calipers can be blown away in time, and secondary scratching of the fixed particles to the surface of the brake disc is reduced.

Description

Technical Field

[0001] This invention relates to the field of yaw systems for wind turbines, specifically to a yaw gear ring and braking mechanism for a wind turbine. Background Technology

[0002] The yaw system (also known as the wind-following system) of a wind turbine is one of the core auxiliary systems of a horizontal axis wind turbine. Its core function is to drive the nacelle (including components such as the rotor and generator) to rotate around the center line of the tower in real time, ensuring that the rotor is always perpendicular to the wind direction and maximizing the capture of wind energy. At the same time, when the unit stops or malfunctions, the braking system locks the nacelle to prevent it from rotating randomly with the wind.

[0003] The yaw system is a closed-loop system integrating mechanical drive, support rotation, braking and locking, and detection and control. It consists of a drive execution module (yaw motor, yaw gearbox, yaw gear pair), a support rotation module (yaw bearing, also known as yaw bearing), a braking and locking module (yaw brake, brake disc), and a detection and control module. Typically, the outer gear ring of the yaw bearing is fixedly connected to the tower body, while the inner bearing is fixedly connected to the tower housing. The yaw motor is installed inside the tower housing, and the drive gear set meshes with the outer gear ring of the yaw bearing to achieve angle adjustment. The brake disc is fixedly installed inside the tower body, and the brake caliper is installed inside the tower housing and engages with the inner side of the brake disc.

[0004] In practical applications, the brake disc is a vulnerable component in yaw systems. With long-term operation, the yaw bearing is at risk of lubrication leakage due to external factors (load pressure, sea wind erosion). Furthermore, the brake caliper, being normally closed, is also at risk of hydraulic oil leakage under long-term high pressure. This leaked oil drips onto the brake disc, causing corrosion. Additionally, particles from the brake caliper's friction pads, mixed with the leaked oil, further accelerate brake disc wear, ultimately affecting braking safety. Regular maintenance checks the brake disc's thickness and flatness, and calibrate the brake calipers to ensure stable equipment operation. When the brake disc is heavily worn and pitted, polishing equipment is typically used to restore its smooth surface. However, as the brake disc becomes thinner, falling below safe thickness, not only is its strength affected, but the caliper's piston stroke can no longer meet braking requirements. In such cases, the entire brake disc needs to be replaced. The large size and weight of the brake disc make replacement difficult. Summary of the Invention

[0005] Therefore, the purpose of this invention is to provide a yaw gear ring and braking mechanism for a wind turbine generator to solve the technical problems mentioned in the background.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a yaw gear ring and braking mechanism for a wind turbine, comprising a tower body and a tower nacelle, wherein the tower body and the tower nacelle are rotatably connected by a yaw bearing, and multiple sets of hydraulic calipers are installed at the bottom of the tower nacelle. A brake disc is installed on the inner side of the tower body by means of a column foot, the brake disc engaging with the multiple sets of hydraulic calipers, and the column foot maintaining an installation gap between the tower body and the brake disc. The brake disc includes a brake root and a brake friction part, and the brake root and brake friction part are movably installed by means of a leveling component, and the brake root and brake friction part are kept in a fixed position. An installation gap is left, and a fitting groove is opened at the top of the brake root. Multiple sets of first circular holes penetrating the brake root are evenly opened at the top of the fitting groove. An annular frame is installed inside the fitting groove. Multiple sets of extension sleeves are set at the bottom of the annular frame. Multiple sets of extension sleeves match multiple sets of first circular holes, and multiple sets of extension sleeves are locked to the brake root with nuts. An annular tube is fitted inside the annular frame. Multiple sets of air jets are evenly arranged on the inner and outer sides of the annular tube, and multiple sets of air intake pipes are set at the bottom of the annular tube. Multiple sets of air intake pipes pass through multiple sets of extension sleeves, and multiple sets of air intake pipes are connected to air pumps.

[0007] By adopting the above technical solution, an annular frame is set on the surface of the brake disc to install an annular tube. The annular tube is connected to an air pump. The surface of the brake disc is treated with air jets through the annular tube. This not only plays a certain role in heat dissipation and reduces the risk of thermal deformation of the brake disc due to friction, but also blows away the oil dripping onto the surface of the brake disc, reducing the residence time of the leaking oil and reducing the corrosion of the brake disc surface by the oil. In addition, the air jet treatment can also promptly blow away the fixed particles that fall off the brake caliper friction pads, reducing their secondary scratches on the surface of the brake disc.

[0008] The present invention is further configured such that the yaw bearing includes an outer gear ring and an inner ring, the outer gear ring and the tower body are connected by a flange, and the inner ring and the tower housing are connected by a flange.

[0009] Preferably, by setting a yaw bearing, the tower body and tower compartment can be rotated and connected, and the bearing can also serve as a load-bearing installation tool.

[0010] The present invention is further configured such that the top of the tower compartment is provided with multiple sets of yaw drive devices, and the multiple sets of yaw drive devices are driven and connected to the external gear ring of the yaw bearing.

[0011] Preferably, the tower can be driven to rotate by a yaw drive device, such as a yaw motor or gearbox.

[0012] The present invention is further configured such that the top of the braking friction part has multiple sets of second circular holes, and the top of the braking friction part is provided with a raised ring, and the braking friction part engages with multiple sets of hydraulic calipers.

[0013] Preferably, multiple sets of second circular holes are provided for fitting and installing the leveling components, while the raised ring can block oil leakage from the yaw bearing, reducing its flow to the hydraulic caliper engagement position.

[0014] The present invention is further configured such that the leveling component includes a threaded rod, the threaded rod and the brake root are threadedly connected, the top of the threaded rod is provided with a hexagonal block, the bottom of the threaded rod is provided with an outer convex ring, the bottom of the outer convex ring is provided with a fixing rod, the fixing rod is matched with the second circular hole, and the internal thread of the threaded rod is connected with a locking bolt, the female head of the locking bolt is in contact with the bottom of the brake friction part.

[0015] Preferably, by setting a leveling component, a small local height adjustment can be made on the brake friction part, and the initial height can be adjusted by rotating the threaded rod, so that the local height of the brake friction part can be adjusted when tightening the threaded rod and the locking bolt.

[0016] The invention is further configured such that a locking nut is externally threaded onto the locking bolt, the locking nut being located above the hexagonal block and fitting against its top.

[0017] Preferably, by providing a locking nut, such as a self-locking nut, the locking bolt and threaded rod are further reinforced.

[0018] The present invention is further configured such that the leveling component is provided in multiple sets, the multiple sets of leveling components correspond to multiple sets of second circular holes, and the fixing rods of the multiple sets of leveling components respectively pass through the interior of the second circular holes.

[0019] Preferably, multiple sets of leveling components are provided, which can adjust the flatness when replacing the brake friction parts, so that they can better fit with the multiple sets of hydraulic calipers.

[0020] The present invention is further configured such that the multiple sets of hydraulic calipers are connected to a hydraulic system for controlling the multiple sets of hydraulic calipers to close and clamp the brake friction part of the brake disc.

[0021] Preferably, a hydraulic system is used to control and drive the hydraulic caliper, so that the hydraulic caliper can clamp the braking friction part of the brake disc to form a braking effect.

[0022] In summary, the present invention has the following main beneficial effects: 1. This invention involves installing an annular tube on the surface of the brake disc using an annular frame. The annular tube is connected to an air pump, and the surface of the brake disc is treated with air jets through the annular tube. This not only provides a certain degree of heat dissipation and reduces the risk of thermal deformation of the brake disc due to friction, but also blows away oil dripping onto the surface of the brake disc, reducing the residence time of leaking oil and reducing the corrosion of the brake disc surface by oil. Furthermore, the air jet treatment can also promptly blow away fixed particles that fall off the brake caliper friction pads, reducing their secondary scratches on the surface of the brake disc.

[0023] 2. This invention, by setting up an assembled brake disc, makes brake disc replacement convenient. Traditional brake discs are one-piece steel structures, which are heavy and difficult to replace. The brake disc in this application consists of two parts: the brake root and the brake friction part. The brake root is installed during the construction of the equipment, while the brake friction part can be installed from below the brake root through the leveling component. Replacing the friction part separately is relatively lightweight, which not only reduces the difficulty of replacement but also reduces the later maintenance cost. Furthermore, the brake root and the brake friction part form an installation gap during assembly. This gap can discharge the blown-out leakage oil. That is, when air is sprayed from both the inside and outside of the annular pipe at the same time, the leakage oil can be discharged from the outside of the brake root or through the installation gap between the brake root and the brake friction part. This avoids the air spraying process blowing the leakage oil towards the hydraulic caliper engagement point. The leveling component is a high-strength bolt structure. Multiple sets of adjustment components are installed and fixed to the brake friction part at the same time, which not only ensures the strength of the brake disc but also allows for local leveling of the brake friction part, making the entire brake friction part flatter and better engaging with multiple sets of brake calipers. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram showing the distribution of the tower body, yaw bearing, brake disc, and brake caliper in this invention. Figure 3 For the present invention Figure 2 Enlarged view of point A in the image; Figure 4 This is a schematic diagram showing the distribution of the brake disc, ring frame, and ring tube in this invention; Figure 5 This is a demonstration diagram showing the installation of the brake disc, ring frame, ring tube, and leveling assembly in this invention. Figure 6 This is a schematic diagram showing the distribution of the brake root, annular frame, extension sleeve, annular tube, and jet nozzle in this invention. Figure 7 This is a schematic diagram showing the distribution of the brake root, leveling assembly, and brake friction cloth in this invention. Figure 8 This is a schematic diagram of the leveling component structure in this invention.

[0025] Explanation of reference numerals in the attached figures: 1. Tower body; 2. Outer gear ring; 3. Inner ring; 4. Tower compartment; 5. Yaw drive device; 6. Hydraulic caliper; 7. Brake root; 8. Fitting groove; 9. First circular hole; 10. Ring frame; 11. Extension sleeve; 12. Ring pipe; 13. Jet nozzle; 14. Air inlet pipe; 15. Leveling assembly; 1501. Threaded rod; 1502. Hexagonal block; 1503. Outer convex ring; 1504. Fixing rod; 1505. Locking bolt; 1506. Locking nut; 16. Brake friction part; 17. Second circular hole; 18. Raised ring. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0027] The embodiments of the present invention will now be described.

[0028] A yaw gear ring and braking mechanism for a wind turbine generator, please refer to 1- Figure 8 The system includes a tower body 1 and a tower compartment 4, which are rotatably connected by a yaw bearing. The tower compartment 4 houses a detection and control module, including a wind direction sensor, a yaw counter, and a yaw controller. Multiple sets of hydraulic calipers 6 are installed at the bottom of the tower compartment 4 and connected to a hydraulic system. A brake disc is mounted on the inner side of the tower body 1 via a support column. The support column and brake disc are flange-mounted, and the brake disc engages with the multiple sets of hydraulic calipers 6. The support column maintains an installation gap between the tower body 1 and the brake disc. The brake disc includes a brake root 7 and a brake friction part 16, which are movably mounted via a leveling assembly 15. An installation gap is maintained between the brake root 7 and the brake friction part 16. For draining leaked oil, a fitting groove 8 is provided at the top of the brake root 7. Multiple sets of first circular holes 9 are evenly provided at the top of the fitting groove 8, penetrating the brake root 7. An annular frame 10 is installed inside the fitting groove 8. Multiple sets of extension sleeves 11 are provided at the bottom of the annular frame 10. The multiple sets of extension sleeves 11 match the multiple sets of first circular holes 9. Nuts are provided on the multiple sets of extension sleeves 11 and locked to the brake root 7. An annular tube 12 is fitted inside the annular frame 10. Multiple sets of air jets 13 are evenly provided on the inner and outer sides of the annular tube 12. Multiple sets of air intake pipes 14 are provided at the bottom of the annular tube 12. The multiple sets of air intake pipes 14 penetrate the multiple sets of extension sleeves 11 respectively. The multiple sets of air intake pipes 14 are connected to air pumps. The air pumps are controlled by the yaw controller and are turned on periodically.

[0029] Please see Figure 3The yaw bearing includes an outer gear ring 2 and an inner ring 3. The outer gear ring 2 and the tower body 1 are connected by a flange, and the inner ring 3 and the tower compartment 4 are connected by a flange. By setting the yaw bearing, the tower body 1 and the tower compartment 4 can be rotated and connected, and it can also play a role in load-bearing and installation.

[0030] Please see Figure 2 The top of the tower compartment 4 is equipped with multiple yaw drive devices 5, which are connected to the outer gear ring 2 of the yaw bearing. By setting the yaw drive devices 5, such as yaw motors and gearboxes, the tower compartment 4 can be driven to rotate.

[0031] Please see Figure 7 and Figure 8 The top of the brake friction part 16 has multiple sets of second round holes 17, and the top of the brake friction part 16 is provided with a raised ring 18. The brake friction part 16 engages with multiple sets of hydraulic calipers 6. The multiple sets of second round holes 17 are used for fitting and installing the leveling component 15, while the raised ring 18 can block the oil leaking from the yaw bearing and reduce its flow to the engagement position of the hydraulic calipers 6.

[0032] Please see Figure 8 The leveling component 15 includes a threaded rod 1501, which is threadedly connected to the brake root 7. A hexagonal block 1502 is provided at the top of the threaded rod 1501, and an outer convex ring 1503 is provided at the bottom of the threaded rod 1501. A fixing rod 1504 is provided at the bottom of the outer convex ring 1503. The fixing rod 1504 matches the second circular hole 17. A locking bolt 1505 is threadedly connected to the inside of the threaded rod 1501. The female head of the locking bolt 1505 fits against the bottom of the brake friction part 16. By setting the leveling component 15, a small amount of height adjustment can be made to a local area of ​​the brake friction part 16. Rotating the threaded rod 1501 can adjust its initial height. Therefore, tightening the threaded rod 1501 and the locking bolt 1505 can adjust the local height of the brake friction part 16.

[0033] Please see Figure 8 The locking bolt 1505 is externally threaded with a locking nut 1506. The locking nut 1506 is located above the hexagonal block 1502 and fits against its top. By setting the locking nut 1506, such as a self-locking nut, the locking bolt 1505 and the threaded rod 1501 are further reinforced.

[0034] Please see Figure 5 The leveling component 15 is provided in multiple sets, and the multiple sets of leveling components 15 correspond to the multiple sets of second round holes 17. The fixing rods 1504 of the multiple sets of leveling components 15 pass through the interior of the second round holes 17 respectively. The multiple sets of leveling components 15 can adjust the flatness when replacing the brake friction part 16, so that it can better fit with the multiple sets of hydraulic calipers 6.

[0035] Please see Figure 1 Multiple sets of hydraulic calipers 6 are connected to a hydraulic system, which is used to control the multiple sets of hydraulic calipers 6 to close and clamp the brake friction part 16 of the brake disc. By setting the hydraulic system to control and drive the hydraulic calipers 6, the hydraulic calipers 6 can clamp the brake friction part 16 of the brake disc to form a braking effect.

[0036] The working principle of this invention is as follows: When the yaw system in this application is working, the air pump is periodically started by the control system of the tower 4. The air pump delivers gas into the air inlet pipe 14 through the air pipe. Then, the gas in the annular pipe 12 is sprayed out from multiple sets of jet nozzles 13 distributed on the inner and outer sides, and blown evenly onto the upper surface of the brake disc. When the grease leaking from the yaw bearing drips onto the surface of the brake disc, regardless of whether the grease is located on the inner or outer side of the annular pipe 12, it will be blown away by the impact of the flowing gas. The oil that falls on the outer side of the annular pipe 12 is discharged through the gap between the tower body 1 and the brake root 7, while the oil that falls on the inner side of the annular pipe 12 is discharged through the gap between the brake root 7 and the brake friction part 16. The raised ring 18 can play a certain blocking role. At the same time, the sprayed gas evenly dissipates heat from the brake disc to reduce thermal deformation. At the same time, the sprayed gas blows away the fallen friction pad particles in time to prevent the metal particles of the friction pad from scratching the brake disc again.

[0037] When replacing the brake friction part 16, remove the locking bolts 1505 and locking nuts 1506 of the multiple sets of leveling components 15. Raise the brake friction part 16 by starting the equipment, aligning its multiple sets of second round holes 17 with the fixing rods 1504 of each leveling component 15. Then reinstall the locking bolts 1505 and check the flatness. If adjustment is needed, first loosen the locking bolts 1505 downwards. If a portion of the brake friction part 16 needs to be raised, use a wrench to limit and fix the locking bolts 1505. Then, use another wrench to rotate the hexagonal block 1502, causing the threaded rod 1501 to rotate and rise. Then reverse the operation to fix the hexagonal block 1502. Corner block 1502, rotate locking bolt 1505 to adjust its height, use the female head of locking bolt 1505 and outer convex ring 1503 to clamp brake friction part 16. Due to the change in height of threaded rod 1501, after locking bolt 1505 is fixed, it can locally squeeze brake friction part 16, causing it to produce slight deformation. Similarly, if it is necessary to lower a part of brake friction part 16, the height of threaded rod 1501 is lowered in the opposite direction. After the adjustment is completed, lock bolt 1505 is fixed by continuing to limit and then lock nut 1506 is tightened to further reinforce locking bolt 1505, threaded rod 1501 and lock nut 1506.

[0038] When installing a traditional integral brake disc, the flatness of the disc is affected by manufacturing differences, external forces during transportation and storage, and the tightening force of multiple flange bolts during installation. Therefore, local grinding is usually required.

[0039] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the invention and are not intended to limit it. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the invention, but such modifications, substitutions, and variations are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A yaw gear ring and braking mechanism for a wind turbine generator, comprising a tower body (1) and a tower nacelle (4), characterized in that: The tower body (1) and the tower compartment (4) are rotatably connected by a yaw bearing. Multiple sets of hydraulic calipers (6) are installed at the bottom of the tower compartment (4). A brake disc is installed on the inner side of the tower body (1) by a column foot. The brake disc engages with the multiple sets of hydraulic calipers (6). The column foot leaves an installation gap between the tower body (1) and the brake disc. The brake disc includes a brake root (7) and a brake friction part (16). The brake root (7) and the brake friction part (16) are movably installed by a leveling component (15). An installation gap is left between the brake root (7) and the brake friction part (16). A fitting groove (8) is opened at the top of the brake root (7). The top of the fitting groove (8) is evenly distributed. There are multiple sets of first round holes (9) penetrating the brake root (7). A ring frame (10) is installed inside the fitting groove (8). Multiple sets of extension sleeves (11) are provided at the bottom of the ring frame (10). The multiple sets of extension sleeves (11) match the multiple sets of first round holes (9). Nuts are provided on the multiple sets of extension sleeves (11) and the brake root (7) are locked. A ring tube (12) is fitted inside the ring frame (10). Multiple sets of air jets (13) are evenly arranged on the inner and outer sides of the ring tube (12). Multiple sets of air inlet pipes (14) are provided at the bottom of the ring tube (12). The multiple sets of air inlet pipes (14) penetrate the multiple sets of extension sleeves (11) respectively. The multiple sets of air inlet pipes (14) are connected to an air pump.

2. The yaw gear ring and braking mechanism for a wind turbine generator according to claim 1, characterized in that: The yaw bearing includes an outer gear ring (2) and an inner ring (3). The outer gear ring (2) and the tower body (1) are connected by a flange, and the inner ring (3) and the tower compartment (4) are connected by a flange.

3. The yaw gear ring and braking mechanism for a wind turbine generator according to claim 1, characterized in that: The top of the tower compartment (4) is provided with multiple sets of yaw drive devices (5), which are driven and connected to the outer gear ring (2) of the yaw bearing.

4. The yaw gear ring and braking mechanism of a wind turbine generator according to claim 1, characterized in that: The top of the braking friction part (16) has multiple sets of second circular holes (17), and the top of the braking friction part (16) is provided with a raised ring (18). The braking friction part (16) and multiple sets of hydraulic calipers (6) engage.

5. The yaw gear ring and braking mechanism for a wind turbine generator according to claim 4, characterized in that: The leveling assembly (15) includes a threaded rod (1501), which is threaded to the brake root (7). The top of the threaded rod (1501) is provided with a hexagonal block (1502), and the bottom of the threaded rod (1501) is provided with an outer convex ring (1503). The bottom of the outer convex ring (1503) is provided with a fixing rod (1504). The fixing rod (1504) matches the second round hole (17). The threaded rod (1501) is internally threaded to a locking bolt (1505), and the female head of the locking bolt (1505) is attached to the bottom of the brake friction part (16).

6. The yaw gear ring and braking mechanism for a wind turbine generator according to claim 5, characterized in that: The locking bolt (1505) is externally threaded with a locking nut (1506), which is located above the hexagonal block (1502) and fits against its top.

7. The yaw gear ring and braking mechanism for a wind turbine generator according to claim 6, characterized in that: The leveling component (15) is provided in multiple sets, and the multiple sets of leveling components (15) correspond to the multiple sets of second round holes (17), and the fixing rods (1504) of the multiple sets of leveling components (15) respectively pass through the interior of the second round holes (17).

8. The yaw gear ring and braking mechanism for a wind turbine generator according to claim 1, characterized in that: The multiple sets of hydraulic calipers (6) are connected to a hydraulic system for controlling the multiple sets of hydraulic calipers (6) to close and clamp the brake friction part (16) of the brake disc.

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