Rear rack of wind power equipment and wind power equipment

Abstract

The invention relates to the technical field of wind power equipment, and discloses a wind power equipment rear rack and wind power equipment.The wind power equipment rear rack comprises a tower drum and a rear rack shell, the rear rack shell is rotationally arranged at the top of the tower drum, a large gear ring is fixed to the outer wall of the top end of the tower drum, and a synchronous driving motor is arranged on the inner wall of the bottom of the rear rack shell; according to the wind power generation device, the rear rack shell is driven to rotate around the top end of the tower drum, the angle of the wind power blades can be conveniently adjusted according to the wind direction, and the wind power generation device has the advantages that the wind power generation device is simple in structure and convenient to use, and the wind power generation efficiency is improved. And after adjustment is completed, a hydraulic oil cylinder drives a lifting plate to ascend, a wedge-shaped block and a friction block to ascend, and through abutting friction between the friction block and a friction ring and the outer wall of the tower drum, the rear rack shell is further prevented from rotating, and the braking effect after angle adjustment of the rear rack shell is improved.

Description

Technical Field

[0001] This invention relates to the field of wind power equipment technology, specifically to a rear frame for wind power equipment and wind power equipment. Background Technology

[0002] The rear frame of a wind turbine is a load-bearing structure that supports key components such as generators, transformers, and converters in a wind turbine unit. Its design directly affects the unit's transportation efficiency, compatibility, and operational stability.

[0003] For example, an existing Chinese patent (CN220522699U) discloses a rear frame and wind turbine equipment, including a rear frame body and a transformer equipment support. The rear frame body includes a first main beam and a second main beam that are arranged opposite to each other and connected to each other. The transformer equipment support includes a pair of fixed frames and a pair of hanging frames; the pair of fixed frames are fixed between the first and second main beams and are used to fix at least one transformer equipment; the pair of hanging frames are fixed to the bottom of the pair of fixed frames and are located between the first and second main beams, and are used to hang at least one transformer equipment. Different transformer equipment can be flexibly assembled or selected, and the installation distance of the transformer equipment is shortened by hanging it with the hanging frames, thereby reducing the cost of wind turbine equipment and improving its market competitiveness.

[0004] Most existing wind turbines use rigid flanges to connect the rear frame to the tower, preventing the nacelle from rotating around its vertical axis. This design forces the rotor to passively adapt to the wind direction rather than actively adjusting its angle of attack. When the wind direction deviates from the rotor axis, the wind energy utilization coefficient decreases significantly. Summary of the Invention

[0005] The purpose of this invention is to provide a rear frame for a wind turbine and a wind turbine itself, in order to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a rear frame of a wind turbine, comprising a tower and a rear frame housing, wherein the rear frame housing is rotatably mounted on the top of the tower, a large gear ring is fixed to the outer wall of the top of the tower, a synchronous drive motor is mounted on the inner wall of the bottom of the rear frame housing, a drive gear is fixed to the bottom end of the output shaft of the synchronous drive motor, the drive gear meshes with the large gear ring, an outer flange is fixed to the outer wall of the bottom of the rear frame housing, a friction ring is mounted at the bottom of the outer flange, a gap is left between the friction ring and the outer wall of the tower, hydraulic cylinders are mounted on both sides of the outer wall of the bottom of the rear frame housing, a lifting plate is mounted at the bottom end of the piston rod of the hydraulic cylinder, a wedge block is mounted on the top of the lifting plate, and the wedge block is located below the gap between the friction ring and the outer wall of the tower.

[0007] As a further explanation of the present invention, the wedge block is narrow at the top and wide at the bottom, and a friction block is provided at the top of the wedge block, which can abut against the inner wall of the friction ring and the outer wall of the tower respectively.

[0008] As a further explanation of the present invention, the outer shells on both sides of the friction block are provided with anti-slip textures to increase friction, and the inner wall of the friction ring is also provided with anti-slip textures.

[0009] As a further explanation of the present invention, bearing seats are provided on both sides of the bottom inner wall of the rear frame housing, and a main shaft is provided between the bearing seats.

[0010] As a further explanation of the present invention, a guide sleeve is provided in the center of the lifting plate, and a guide post is provided inside the guide sleeve. The top end of the guide post is fixed to the bottom outer wall of the rear frame housing.

[0011] As a further explanation of the present invention, an outer positioning plate is provided on one side of the top of the lifting plate, and the contour of one side of the outer positioning plate matches the contour of the outer wall of the friction ring.

[0012] As a further explanation of the present invention, a support column is provided at the center of the top of the tower, and a rotating step plate is provided on the outer wall of the support column. There are multiple rotating step plates, and the multiple rotating step plates are arranged in a spiral layer.

[0013] As a further explanation of the present invention, there are four synchronous drive motors, which are evenly distributed circumferentially above the large gear ring, and the four synchronous drive motors are connected to the rear frame housing by bolts.

[0014] As a further explanation of the present invention, the outer flange has reinforcing ribs on both sides of its outer wall, and the top of the reinforcing ribs is fixedly connected to the bottom surface of the rear outer shell.

[0015] A wind power device, including the rear frame of the wind power device.

[0016] Compared with the prior art, the beneficial effects of the present invention are: This invention, through the design of a rear frame housing, friction blocks, and a large gear ring, enables a rotatable connection between the rear frame housing and the top of the tower during the use of the wind turbine's rear frame. A synchronous drive motor drives a drive gear to rotate, and the meshing of the drive gear with the large gear ring drives the rear frame housing to rotate around the top of the tower. This facilitates adjustment of the wind turbine blade angle according to wind direction, improving power generation efficiency. After adjustment, the synchronous drive motor's built-in electromagnetic brake prevents rotation. Simultaneously, a hydraulic cylinder raises a lifting plate, causing the wedge-shaped block and friction block to rise. The friction between the friction block and the friction ring, as well as the outer wall of the tower, further prevents the rear frame housing from rotating, improving the braking effect after the rear frame housing angle is adjusted.

[0017] The parts of the device not covered herein are the same as or can be implemented using existing technologies. Attached Figure Description

[0018] Figure 1 This is a perspective view of the rear frame and wind turbine of the present invention. Figure 2 This is a perspective view of the rear frame of a wind turbine and the wind turbine itself, from another angle, according to the present invention. Figure 3 for Figure 2 Enlarged structural diagram at point A in the middle; Figure 4 This is a front view of the rear frame of a wind turbine and the wind turbine itself, according to the present invention. Figure 5 This is a schematic diagram of the rear frame of a wind turbine and the internal structure of the wind turbine according to the present invention; Figure 6 for Figure 5 Enlarged structural diagram at point B; Figure 7 This is a schematic diagram of the rear frame of a wind turbine and the internal structure of the wind turbine from another perspective according to the present invention; Figure 8 This is a schematic diagram of the rear frame of a wind turbine and the internal structure of the wind turbine, from another perspective, according to the present invention. Figure 9 for Figure 8 Enlarged structural diagram at point C; Figure 10 This is a perspective view of the rear frame of a wind turbine and the wind turbine itself, according to the present invention.

[0019] In the diagram: 1. Tower; 2. Rear frame shell; 3. Bearing housing; 4. Main shaft; 5. Outer flange; 6. Friction ring; 7. Hydraulic cylinder; 8. Lifting plate; 9. Wedge block; 10. Friction block; 11. Outer positioning plate; 12. Support column; 13. Rotating step plate; 14. Large gear ring; 15. Synchronous drive motor; 16. Drive gear; 17. Reinforcing rib; 18. Guide sleeve; 19. Guide column. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0021] Example 1: See Figures 1-8This invention provides a technical solution: a rear frame for a wind turbine, comprising a tower 1 and a rear frame housing 2. The rear frame housing 2 is rotatably mounted on the top of the tower 1, and is rotatably connected to the top of the tower 1 via bearings, allowing the housing to rotate freely around the tower axis. This design forms the basis for wind direction adjustment, ensuring that the internally installed wind turbine blades are always aligned with the wind direction by rotating the housing, maximizing wind energy capture. For example, when the wind direction changes, the housing can rotate 360° to adjust the angle, ensuring that the angle between the windward side of the blades and the wind direction is close to 0°, thus improving power generation efficiency.

[0022] A large gear ring 14 is fixed to the outer wall of the top of the tower 1. The large gear ring 14 serves as the passive component of the transmission system and is fixed to the outer wall of the tower 1. The meshing of the large gear ring 14 with the driving gear 16 adopts an involute tooth profile design, reducing energy loss during transmission and improving mechanical efficiency. Simultaneously, the gear ratio can be adjusted according to the motor speed and load requirements. For example, by increasing the number of teeth on the driving gear 16, the rotational speed of the rear frame housing 2 can be reduced, improving adjustment accuracy.

[0023] A synchronous drive motor 15 is installed on the inner wall of the bottom of the rear frame housing 2. The synchronous drive motor 15 is a rotational power source, fixed to the inner wall of the housing by bolts. Its output shaft points vertically downwards for easy connection to the drive gear 16. The motor has a built-in encoder that provides real-time feedback of speed and position information, enabling closed-loop control. The drive gear 16 is fixed to the bottom of the output shaft of the synchronous drive motor 15. The drive gear 16 meshes with a large gear ring 14. Through the meshing transmission between the large gear ring 14 and the drive gear 16, the rear frame housing 2 can rotate 360° around the top of the tower 1. This design allows the wind turbine blades to adjust their angle according to the real-time wind direction, ensuring they are always in the optimal windward position, thereby maximizing wind energy capture.

[0024] An outer flange 5 is fixed to the bottom outer wall of the rear frame housing 2. The outer flange 5 serves as a connecting component and is fixed to the bottom of the housing by welding. A friction ring 6 is located at the bottom of the outer flange 5. The inner wall of the friction ring 6 is machined with V-shaped anti-slip patterns, which mechanically interlock with the anti-slip patterns of the friction block 10, improving anti-slip capability during braking. A gap is left between the friction ring 6 and the outer wall of the tower 1, designed to allow space for the friction block 10 to rise. If the gap is too small, the friction block 10 will not be able to be inserted; if it is too large, the braking stiffness will be reduced. When the lifting plate 8 is pushed up by the hydraulic cylinder 7, the friction block 10 must precisely fill this gap to achieve bidirectional clamping.

[0025] Hydraulic cylinders 7 are located on both sides of the bottom outer wall of the rear frame housing 2. A lifting plate 8 is located at the bottom end of the piston rod of the hydraulic cylinder 7, and a wedge block 9 is located at the top of the lifting plate 8. The wedge block 9 is positioned below the gap between the friction ring 6 and the outer wall of the tower 1. The hydraulic cylinders 7 are braking actuators, fixed to both sides of the housing via flanges. The symmetrical layout ensures balanced force on the lifting plate 8, preventing jamming due to uneven load. When the lifting plate 8 rises, the wedge block 9 converts the vertical force into a horizontal clamping force, causing the friction block 10 to press tightly against the friction ring 6 and the tower 1. When the hydraulic system is activated, the cylinders push the lifting plate 8 upwards, and the wedge block 9 moves synchronously, its top gradually entering the gap, pushing the friction block 10 upwards to achieve braking.

[0026] The wedge block 9 is narrow at the top and wide at the bottom, with a friction block 10 at its top. The friction block 10 can abut against the inner wall of the friction ring 6 and the outer wall of the tower 1, respectively. This shape amplifies the braking force through the principle of mechanical force amplification. When the hydraulic cylinder 7 applies a certain vertical force, the wedge block 9 can be inserted into the gap between the friction ring 6 and the tower 1, providing a greater horizontal clamping force and significantly reducing the pressure requirements of the hydraulic system.

[0027] The friction block 10 has anti-slip textures on both sides of its outer shell to increase friction, and the friction ring 6 also has anti-slip textures on its inner wall. The anti-slip textures complement the texture of the friction block 10, forming a mechanical interlocking structure.

[0028] Bearing seats 3 are located on both sides of the bottom inner wall of the rear frame housing 2, and the main shaft 4 is located between the bearing seats 3. The bearing seats 3 are used to install the support bearings of the main shaft 4. The seats are designed with oil grooves and oil filling holes for regular lubrication and to extend the bearing life. The main shaft 4 is the rotation center of the wind turbine blades, ensuring smooth and vibration-free rotation. Double-row tapered roller bearings are installed in the bearing seats 3, which can simultaneously withstand the radial and axial forces of the main shaft 4. The bearing seats 3 are designed with a split structure, and the upper part can be quickly disassembled for easy regular lubrication of the main shaft 4 and bearing replacement.

[0029] A guide sleeve 18 is provided in the center of the lifting plate 8, and a guide post 19 is provided inside the guide sleeve 18. The top of the guide post 19 is fixed to the bottom outer wall of the rear frame housing 2. The guide sleeve 18 is a linear guide motion pair, and the guide sleeve 18 and the guide post 19 are clearance fit to ensure that the lifting plate 8 moves only in the vertical direction.

[0030] There are four synchronous drive motors 15, which are evenly distributed circumferentially above the large gear ring 14. The four synchronous drive motors 15 are bolted to the rear frame housing 2 to ensure they do not loosen in a vibration environment. Spring washers and locking washers are installed at the connection points to prevent the nuts from turning back. The four motors are evenly distributed at 90° angles, forming a redundant drive system. When a single motor fails, the remaining motors can still provide driving force, ensuring uninterrupted system operation. The even distribution ensures balanced torque transmission, preventing the large gear ring 14 from tilting due to uneven load.

[0031] The outer flange 5 has reinforcing ribs 17 on both sides of its outer wall. The top of the reinforcing ribs 17 is fixedly connected to the bottom surface of the rear outer shell 2. The reinforcing ribs 17 are welded to the flange and the outer shell to reduce stress concentration and improve structural rigidity. The reinforcing ribs 17 and the rear frame outer shell 2 are welded to the same material.

[0032] When the rear frame of the wind turbine is in use, the rear frame housing 2 is rotatably connected to the top of the tower 1 via bearings. A synchronous drive motor 15 drives a drive gear 15 to rotate. The drive gear 15 meshes with a large gear ring 14, driving the rear frame housing 2 to rotate around the top of the tower 1. This facilitates adjustment of the wind turbine blade angle according to wind direction, improving power generation efficiency. After adjustment, the synchronous drive motor 15's built-in electromagnetic brake applies braking to prevent rotation. Simultaneously, a hydraulic cylinder 7 raises a lifting plate 8, causing the wedge block 9 and friction block 10 to rise. The friction block 10, in contact with the friction ring 6 and the outer wall of the tower 1, further prevents the rear frame housing 2 from rotating. The electromagnetic brake is automatically triggered the instant the motor is powered off. Spring pressure causes the brake disc and friction pads to fit tightly, generating braking torque. Its response time can be controlled within 0.1 seconds, effectively preventing the rear frame housing 2 from continuing to rotate under inertia. After the wind direction adjustment is completed, the electromagnetic brake can achieve micron-level positioning accuracy, ensuring that the rear frame housing 2 stops at the target angle and avoids the blades deviating from the optimal windward position due to braking error.

[0033] At the same time, the hydraulic cylinder 7 drives the lifting plate 8 to rise, which in turn raises the wedge block 9 and the friction block 10. Through the contact friction between the friction block 10 and the friction ring 6 and the outer wall of the tower 1, the rotation of the rear frame shell 2 is further prevented, and the braking effect after the angle of the rear frame shell 2 is adjusted is improved.

[0034] Example 2: See Figures 1-10 This invention provides a technical solution: a rear frame for a wind turbine, comprising a tower 1 and a rear frame housing 2. The rear frame housing 2 is rotatably mounted on the top of the tower 1, and is rotatably connected to the top of the tower 1 via bearings, allowing the housing to rotate freely around the tower axis. This design forms the basis for wind direction adjustment, ensuring that the internally installed wind turbine blades are always aligned with the wind direction by rotating the housing, maximizing wind energy capture. For example, when the wind direction changes, the housing can rotate 360° to adjust the angle, ensuring that the angle between the windward side of the blades and the wind direction is close to 0°, thus improving power generation efficiency.

[0035] A large gear ring 14 is fixed to the outer wall of the top of tower 1. The large gear ring 14 serves as the passive component of the transmission system and is fixed to the outer wall of tower 1. A synchronous drive motor 15 is installed on the inner wall of the bottom of the rear frame housing 2. The synchronous drive motor 15 is a rotational power source and is fixed to the inner wall of the housing by bolts. Its output shaft points vertically downwards, facilitating connection with the drive gear 16. The motor has a built-in encoder that can provide real-time feedback of speed and position information, enabling closed-loop control. The drive gear 16 is fixed to the bottom of the output shaft of the synchronous drive motor 15. The drive gear 16 meshes with the large gear ring 14. Through the meshing transmission between the large gear ring 14 and the drive gear 16, the rear frame housing 2 can rotate 360° around the top of tower 1. This design allows the wind turbine blades to adjust their angle according to the real-time wind direction, ensuring they are always in the optimal windward position, thereby maximizing wind energy capture.

[0036] An outer flange 5 is fixed to the bottom outer wall of the rear frame housing 2. The outer flange 5 serves as a connecting component and is fixed to the bottom of the housing by welding. A friction ring 6 is located at the bottom of the outer flange 5. The inner wall of the friction ring 6 is machined with V-shaped anti-slip patterns, which mechanically interlock with the anti-slip patterns of the friction block 10, improving anti-slip capability during braking. A gap is left between the friction ring 6 and the outer wall of the tower 1, designed to allow space for the friction block 10 to rise. If the gap is too small, the friction block 10 will not be able to be inserted; if it is too large, the braking stiffness will be reduced. When the lifting plate 8 is pushed up by the hydraulic cylinder 7, the friction block 10 must precisely fill this gap to achieve bidirectional clamping.

[0037] Hydraulic cylinders 7 are located on both sides of the bottom outer wall of the rear frame housing 2. A lifting plate 8 is located at the bottom end of the piston rod of the hydraulic cylinder 7, and a wedge block 9 is located at the top of the lifting plate 8. The wedge block 9 is positioned below the gap between the friction ring 6 and the outer wall of the tower 1. The hydraulic cylinders 7 are braking actuators, fixed to both sides of the housing via flanges. The symmetrical layout ensures balanced force on the lifting plate 8, preventing jamming due to uneven load. When the lifting plate 8 rises, the wedge block 9 converts the vertical force into a horizontal clamping force, causing the friction block 10 to press tightly against the friction ring 6 and the tower 1. When the hydraulic system is activated, the cylinders push the lifting plate 8 upwards, and the wedge block 9 moves synchronously, its top gradually entering the gap, pushing the friction block 10 upwards to achieve braking.

[0038] The wedge block 9 is narrow at the top and wide at the bottom, with a friction block 10 at its top. The friction block 10 can abut against the inner wall of the friction ring 6 and the outer wall of the tower 1, respectively. This shape amplifies the braking force through the principle of mechanical force amplification. When the hydraulic cylinder 7 applies a certain vertical force, the wedge block 9 can be inserted into the gap between the friction ring 6 and the tower 1, providing a greater horizontal clamping force and significantly reducing the pressure requirements of the hydraulic system.

[0039] The friction block 10 has anti-slip textures on both sides of its outer shell to increase friction, and the friction ring 6 also has anti-slip textures on its inner wall. The anti-slip textures complement the texture of the friction block 10, forming a mechanical interlocking structure.

[0040] Bearing seats 3 are located on both sides of the bottom inner wall of the rear frame housing 2, and the main shaft 4 is located between the bearing seats 3. The bearing seats 3 are used to install the support bearings of the main shaft 4. The seats are designed with oil grooves and oil filling holes for regular lubrication and to extend the bearing life. The main shaft 4 is the rotation center of the wind turbine blades, ensuring smooth and vibration-free rotation. Double-row tapered roller bearings are installed in the bearing seats 3, which can simultaneously withstand the radial and axial forces of the main shaft 4. The bearing seats 3 are designed with a split structure, and the upper part can be quickly disassembled for easy regular lubrication of the main shaft 4 and bearing replacement.

[0041] A guide sleeve 18 is provided in the center of the lifting plate 8, and a guide post 19 is provided inside the guide sleeve 18. The top of the guide post 19 is fixed to the bottom outer wall of the rear frame housing 2. The guide sleeve 18 is a linear guide motion pair, and the guide sleeve 18 and the guide post 19 are clearance fit to ensure that the lifting plate 8 moves only in the vertical direction.

[0042] There are four synchronous drive motors 15, which are evenly distributed circumferentially above the large gear ring 14. The four synchronous drive motors 15 are bolted to the rear frame housing 2 to ensure they do not loosen in a vibration environment. Spring washers and locking washers are installed at the connection points to prevent the nuts from turning back. The four motors are evenly distributed at 90° angles, forming a redundant drive system. When a single motor fails, the remaining motors can still provide driving force, ensuring uninterrupted system operation. The even distribution ensures balanced torque transmission, preventing the large gear ring 14 from tilting due to uneven load.

[0043] The outer flange 5 has reinforcing ribs 17 on both sides of its outer wall. The top of the reinforcing ribs 17 is fixedly connected to the bottom surface of the rear outer shell 2. The reinforcing ribs 17 are welded to the flange and the outer shell to reduce stress concentration and improve structural rigidity. The reinforcing ribs 17 and the rear frame outer shell 2 are welded to the same material.

[0044] The outer flange 5, as a key component connecting the rear frame housing 2 and the tower 1, bears the bending moment and torque during rotation. The reinforcing ribs 17 adopt a triangular layout to distribute concentrated stress to the bottom surface of the rear frame housing 2, preventing localized deformation of the flange. When the rear frame of the wind turbine is in use, the rear frame housing 2 is rotatably connected to the top of the tower 1 via bearings. A synchronous drive motor 15 drives a drive gear 15 to rotate. The drive gear 15 meshes with a large gear ring 14, driving the rear frame housing 2 to rotate around the top of the tower 1. This facilitates adjustment of the wind turbine blade angle according to wind direction, improving power generation efficiency. After adjustment, the synchronous drive motor 15's built-in electromagnetic brake applies braking to prevent rotation. Simultaneously, a hydraulic cylinder 7 raises a lifting plate 8, causing the wedge block 9 and friction block 10 to rise. The friction block 10, in contact with the friction ring 6 and the outer wall of the tower 1, further prevents the rear frame housing 2 from rotating. The electromagnetic brake is automatically triggered the instant the motor is powered off. Spring pressure causes the brake disc and friction pads to fit tightly, generating braking torque. Its response time can be controlled within 0.1 seconds, effectively preventing the rear frame housing 2 from continuing to rotate under inertia. After the wind direction adjustment is completed, the electromagnetic brake can achieve micron-level positioning accuracy, ensuring that the rear frame housing 2 stops at the target angle and avoids the blades deviating from the optimal windward position due to braking error.

[0045] At the same time, the hydraulic cylinder 7 drives the lifting plate 8 to rise, which in turn raises the wedge block 9 and the friction block 10. Through the contact friction between the friction block 10 and the friction ring 6 and the outer wall of the tower 1, the rotation of the rear frame shell 2 is further prevented, and the braking effect after the angle of the rear frame shell 2 is adjusted is improved.

[0046] In this embodiment, an outer positioning plate 11 is provided on one side of the top of the lifting plate 8, and the contour of one side of the outer positioning plate 11 matches the contour of the outer wall of the friction ring 6. The contour of the outer positioning plate 11 fits against the outer wall of the friction ring 6, providing initial positioning before the lifting plate 8 rises, ensuring that the wedge block 9 and the friction block 10 are aligned. Before the hydraulic cylinder 7 pushes the lifting plate 8 up, the outer positioning plate 11 contacts the outer wall of the friction ring 6, ensuring that the initial positions of the wedge block 9 and the friction block 10 are accurate, avoiding the friction block 10 failing to contact the friction ring 6 and the tower 1 simultaneously due to assembly errors. During braking, if the rear frame housing 2 experiences a slight displacement due to wind load, the outer positioning plate 11 can restrict the lateral movement of the friction ring 6, ensuring that the friction block 10 always maintains effective contact and preventing braking failure. The surface of the outer positioning plate 11 is coated with a tungsten carbide coating, which can withstand long-term friction of the friction ring 6 without wear.

[0047] A support column 12 is located at the center of the top of the tower 1. Multiple rotating staircases 13 are arranged in a spiral pattern on the outer wall of the support column 12. The support column 12, made of steel, is connected to the tower 1 via flanges and bears the loads of the rotating staircases 13 and personnel. The staircases 13 are made of non-slip steel with an embossed surface. The spiral arrangement allows for multi-level climbing within a limited space.

[0048] Example 3: See Figures 1-10 The present invention provides a technical solution: a wind power equipment, including the rear frame of the wind power equipment in Embodiment 2.

[0049] Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

Claims

1. A rear frame for a wind turbine, comprising a tower (1) and a rear frame housing (2), characterized in that: The tower (1) is rotatably provided with a rear frame housing (2) at the top. A large gear ring (14) is fixed on the outer wall of the top of the tower (1). A synchronous drive motor (15) is provided on the inner wall of the bottom of the rear frame housing (2). A drive gear (16) is fixed at the bottom of the output shaft of the synchronous drive motor (15). The drive gear (16) meshes with the large gear ring (14). An outer flange (5) is fixed on the outer wall of the bottom of the rear frame housing (2). A friction ring (6) is provided at the bottom of the outer flange (5). A gap is left between the friction ring (6) and the outer wall of the tower (1). Hydraulic cylinders (7) are provided on both sides of the outer wall of the bottom of the rear frame housing (2). A lifting plate (8) is provided at the bottom of the piston rod of the hydraulic cylinder (7). A wedge block (9) is provided at the top of the lifting plate (8). The wedge block (9) is located below the gap between the friction ring (6) and the outer wall of the tower (1).

2. The rear frame of a wind turbine according to claim 1, characterized in that: The wedge block (9) is narrow at the top and wide at the bottom. The top of the wedge block (9) is provided with a friction block (10), which can abut against the inner wall of the friction ring (6) and the outer wall of the tower (1) respectively.

3. The rear frame of a wind turbine according to claim 2, characterized in that: The friction block (10) has anti-slip textures on both sides of its outer shell to increase friction, and the friction ring (6) also has anti-slip textures on its inner wall.

4. The rear frame of a wind turbine according to claim 1, characterized in that: The rear frame housing (2) has bearing seats (3) on both sides of the bottom inner wall, and a main shaft (4) is provided between the bearing seats (3).

5. The rear frame of a wind turbine according to claim 1, characterized in that: The lifting plate (8) has a guide sleeve (18) in the center, and a guide post (19) is provided inside the guide sleeve (18). The top of the guide post (19) is fixed to the bottom outer wall of the rear frame shell (2).

6. A rear frame for a wind turbine according to claim 5, characterized in that: The lifting plate (8) has an outer positioning plate (11) on one side of its top, and the outline of one side of the outer positioning plate (11) matches the outline of the outer wall of the friction ring (6).

7. The rear frame of a wind turbine according to claim 1, characterized in that: The tower (1) has a support column (12) at the center of the top, and the outer wall of the support column (12) is provided with a rotating step plate (13). There are multiple rotating step plates (13), and the multiple rotating step plates (13) are arranged in a spiral layer.

8. The rear frame of a wind turbine according to claim 1, characterized in that: There are four synchronous drive motors (15), which are evenly distributed circumferentially above the large gear ring (14). The four synchronous drive motors (15) are connected to the rear frame housing (2) by bolts.

9. A rear frame for a wind turbine according to claim 1, characterized in that: The outer flange (5) has reinforcing ribs (17) on both sides of its outer wall. The top of the reinforcing ribs (17) is fixedly connected to the bottom surface of the rear outer shell (2).

10. A wind power device, characterized in that: Includes the rear frame of the wind power equipment as described in any one of claims 1-9.

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