Multi-degree-of-freedom mechanical braking device for wind driven generator

Abstract

The invention relates to the technical field of wind driven generators, and particularly discloses a multi-degree-of-freedom mechanical braking device for a wind driven generator. The overturning element is arranged at the top end of the supporting element; the clamping element is positioned at the top end of the overturning element; wherein the clamping element comprises a center cone, the center cone is movably arranged in the axial direction, and the outer conical surface of the center cone is matched with the inclined plane sliding block, so that the axial movement of the center cone drives the clamping jaw unit to synchronously and radially stretch out and draw back, and self-centering clamping is achieved; the clamping jaw unit can automatically adapt to the rotor diameter difference and the non-standard curved surface contour by combining the deformation compensation capacity of the elastic connecting block, when the rotor is eccentric or has appearance deviation, the contact position of each clamping plate is independently adjusted, the clamping force is automatically balanced through differential compression of the spring, and the unbalance loading risk is eliminated.

Description

Technical Field

[0001] The present invention relates to the technical field of wind turbines, and in particular to a multi-degree-of-freedom mechanical braking device for wind turbines. Background Art

[0002] Currently, wind turbines require regular inspection and maintenance during operation to ensure their stability and safety. During inspection and maintenance, it is usually necessary to fix the generator rotor or other key components to prevent them from accidentally rotating or moving.

[0003] Traditional clamping devices often use rigid fixtures or hydraulic clamping mechanisms. Wind turbine rotors vary in size and shape, making it difficult for traditional clamps to adapt to varying diameters or non-standard profiles, resulting in unstable clamping and damage to component surfaces. Conventional mechanical clamps are prone to side loads during the clamping process, leading to uneven clamping force distribution, potentially affecting the alignment of the generator shaft and even causing component deformation. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is that ordinary mechanical clamps are prone to produce off-center loads during the clamping process, resulting in uneven distribution of clamping force, which may affect the centering of the generator shaft.

[0005] The above technical problem is solved by the following technical solution: The present invention provides a multi-degree-of-freedom mechanical braking device for a wind turbine, which includes a support element;

[0006] a turning element, the turning element being disposed on a top end of the supporting element; and

[0007] A clamping element, the clamping element being located at a top end of the flip element;

[0008] The clamping element includes a central cone, which is movably arranged along the axial direction. The outer cone surface of the central cone cooperates with the inclined slider, so that the axial movement of the central cone drives the clamping jaw unit to synchronously extend and retract radially, thereby realizing self-centering clamping.

[0009] In a preferred embodiment of the multi-degree-of-freedom mechanical braking device for a wind turbine according to the present invention, the supporting element comprises a supporting frame, a side wall of the supporting frame is provided with a cross bar, and the cross bar is used to connect with the flip element.

[0010] In a preferred embodiment of the multi-degree-of-freedom mechanical brake device for a wind turbine according to the present invention, the flip element includes a sliding plate arranged at the top end of the crossbar, and the sliding plate is reinforced by transverse reinforcing ribs.

[0011] In a preferred embodiment of the multi-degree-of-freedom mechanical brake device for a wind turbine according to the present invention, a pin is provided at the bottom end of the sliding plate, and the pin is inserted into the pin groove of the side wall of the support frame to limit the sliding plate.

[0012] In a preferred embodiment of the multi-degree-of-freedom mechanical braking device for a wind turbine according to the present invention: a cylinder is installed on the top of the support frame, the piston rod end of the cylinder is connected to a sliding block, and the sliding block is slidably connected to the support frame.

[0013] In a preferred embodiment of the multi-degree-of-freedom mechanical brake device for a wind turbine according to the present invention: the clamping jaw unit includes a telescopic cylinder arranged at the bottom end of the support frame, and the end of the piston rod of the telescopic cylinder is connected to the mounting plate.

[0014] In a preferred embodiment of the multi-degree-of-freedom mechanical brake device for a wind turbine according to the present invention, two sets of hinged plates are installed on the side wall of the mounting plate, and the two sets of hinged plates are respectively connected to the bottom end and the side wall of the clamping plate.

[0015] In a preferred embodiment of the multi-degree-of-freedom mechanical braking device for a wind turbine according to the present invention, the clamping unit further comprises a return spring shaft, which is arranged between the hinge plate and the clamping plate, and is used to automatically retract the clamping unit when the clamping is released.

[0016] In a preferred embodiment of the multi-degree-of-freedom mechanical braking device for a wind turbine according to the present invention: the clamping plate is provided with an inclined surface, and the central cone is provided with a curved surface, wherein the connecting blocks of the central cone and the clamping plate are both made of elastic material, wherein the connecting block and the central cone are hinged, and the movement range of the central cone and the connecting block is limited by the groove.

[0017] In a preferred embodiment of the multi-degree-of-freedom mechanical braking device for a wind turbine according to the present invention: the clamping jaw unit also includes a sliding groove arranged on the inner wall of the clamping plate, a limiting rod is installed inside the sliding groove, the inclined slider is sleeved on the side wall of the limiting rod, and a telescopic spring is sleeved between the inclined slider and the limiting rod.

[0018] The beneficial effects of the present invention are as follows: through the coordination of the radian surface of the central cone and the inclined surface of the clamping plate, combined with the deformation compensation capability of the elastic connecting block, the clamping jaw unit can automatically adapt to the difference in rotor diameter and non-standard curved surface contours (such as conical or partially concave), thus avoiding clamping failure or surface damage caused by size mismatch of traditional rigid clamps. When the rotor has eccentricity or shape deviation, each clamping plate independently adjusts the contact position, and the clamping force is automatically balanced by the differential compression of the spring, eliminating the risk of overload; the axial pressure of the central cone is evenly decomposed into radial force through the inclined surface, avoiding rotor deformation caused by single-point overload. The displacement limit of the groove and the elastic connecting block limit the maximum clamping stroke to prevent damage to the rotor surface due to excessive clamping; the reset spring shaft and the telescopic spring work together to ensure that the clamping jaw automatically returns to the initial centering position after release, avoiding the disadvantage of manual adjustment of traditional clamps and significantly shortening maintenance time. Multi-dimensional adaptive clamping can be achieved by single-cylinder drive, which reduces energy consumption compared to traditional multi-hydraulic cylinder systems. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings of the embodiments of the present invention. Obviously, the drawings described below only relate to some embodiments of the present invention and are not intended to limit the present invention. Among them:

[0020] Figure 1 The overall structural diagram of a multi-degree-of-freedom mechanical brake device for a wind turbine is shown;

[0021] Figure 2 A schematic side view of a multi-degree-of-freedom mechanical brake device for a wind turbine is shown;

[0022] Figure 3 A schematic diagram of the structure of a clamping unit of a multi-degree-of-freedom mechanical brake device for a wind turbine is shown;

[0023] Figure 4 A schematic side view of the structure of a clamping unit of a multi-degree-of-freedom mechanical brake device for a wind turbine is shown;

[0024] Figure 5 for Figure 3 Enlarged view of point E in the middle. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the present invention, the present invention is further described in detail below with reference to specific embodiments and the accompanying drawings.

[0026] The terms used in the present invention are those commonly used in the art in view of the functions of the present invention, but these terms may vary according to the intentions of those skilled in the art, precedents, or new technologies in the art. In addition, specific terms may be selected by the applicant, and in such cases, their detailed meanings will be described in the detailed description of the present invention. Therefore, the terms used in the specification should not be understood as simple names, but rather as the meanings of the terms and the overall description of the present invention.

[0027] Reference Figure 1 , this embodiment provides a multi-degree-of-freedom mechanical braking device for a wind turbine, including a support element 1, a support element 1 and a clamping element 3 to achieve adaptive braking of the wind turbine rotor through a three-stage linkage mechanism.

[0028] Support element 1; support element 1, flip element 2 is arranged at the top of support element 1; and clamping element 3, clamping element 3 is located at the top of flip element 2; wherein the clamping element 3 includes a central cone 31, the central cone 31 is movably arranged along the axial direction, the outer cone surface of the central cone 31 cooperates with the inclined slider 32, so that the axial movement of the central cone 31 drives the clamping jaw unit 33 to synchronously extend and retract radially, thereby realizing self-centering clamping.

[0029] Support element 1 serves as the foundational load-bearing structure, secured to the inspection platform via a bottom connecting flange. Internally, it features torsional reinforcement ribs to ensure overall structural stability during braking. Tilting element 2 is connected to the top of support element 1 via its hinged axis and, under hydraulic drive, can achieve pitch adjustment within a ±30° range, initially aligning the axis of clamping element 3 with the centerline of the generator rotor. An external actuator, such as a cylinder or servo motor, propels central cone 31 along its axis. The contact surface between inclined surface A of central cone 31 and inclined slider 32 generates an interaction force, decomposing axial motion into radial components. Inclined slider 32 moves radially along the sliding slot 33f of the clamping jaw unit 33, pushing multiple jaws to contract synchronously, forming an enveloping clamp around the generator rotor. When the rotor is eccentric, the jaws with less contact resistance maintain preload due to the action of telescopic spring 33h. The curved surface B of central cone 31 allows each jaw to independently fine-tune its angle to accommodate variations in rotor taper.

[0030] Reference Figure 1-Figure 2 As an optional embodiment, the supporting element 1 includes a supporting frame 11 , and a side wall of the supporting frame 11 is provided with a cross bar 12 , and the cross bar 12 is used to connect with the flip element 2 .

[0031] The flip element 2 includes a sliding plate 21 arranged at the top end of the crossbar 12, wherein the sliding plate 21 is reinforced by transverse reinforcement ribs.

[0032] A pin rod 22 is provided at the bottom end of the sliding plate 21 , and the pin rod 22 is inserted into the pin groove of the side wall of the support frame 11 to limit the sliding plate 21 .

[0033] A cylinder 23 is installed at the top of the support frame 11 , and the end of the piston rod of the cylinder 23 is connected to a sliding block 24 , and the sliding block 24 is connected to the support frame 11 in a sliding manner.

[0034] The support frame 11 serves as the core load-bearing framework, with the crossbars 12 provided on its side walls forming a rigid connection with the flip element 2, ensuring the stability of the force transmission path. Transverse reinforcement ribs are arranged horizontally and embedded within the sliding plate 21. In the initial state, the pin 22 is inserted into a vertical pin slot in the side wall of the support frame 11, limiting the lateral displacement of the sliding plate 21. During the flipping process, the pin 22 slides along the arc-shaped trajectory of the pin slot (preferably a circular slot with a radius of R50mm), guiding the rotation of the sliding plate 21. A hemispherical pit (2mm deep) is provided at the end of the pin slot, which forms a locking position with the spring steel ball at the end of the pin 22. The end of the stroke of the cylinder 23 triggers a mechanical limit switch, doubly ensuring the accuracy of the flip angle.

[0035] Reference Figure 2-Figure 5 In one embodiment provided in the present application, the clamping claw unit 33 includes a telescopic cylinder 33a provided at the bottom end of the support frame 11, and the piston rod end of the telescopic cylinder 33a is connected to the mounting plate 33b.

[0036] Two sets of hinge plates 33c are installed on the side wall of the mounting plate 33b, and the two sets of hinge plates 33c are respectively connected to the bottom end and the side wall of the clamping plate 33d.

[0037] The clamping jaw unit 33 further includes a return spring shaft 33e, which is disposed between the hinge plate 33c and the clamping plate 33d, and is used to automatically retract the clamping jaw unit 33 when the clamping is released.

[0038] The clamping plate 33d is provided with an inclined surface A, and the central cone 31 is provided with a curved surface B, wherein the connecting block C of the central cone 31 and the clamping plate 33d are both made of elastic material, wherein the connecting block C and the central cone 31 are hinged, and the movement range of the central cone 31 and the connecting block C is limited by the groove D.

[0039] The clamping jaw unit 33 also includes a sliding groove 33f arranged on the inner wall of the clamping plate 33d, a limiting rod 33g is installed inside the sliding groove 33f, the inclined slider 32 is sleeved on the side wall of the limiting rod 33g, and a telescopic spring 33h is sleeved between the inclined slider 32 and the limiting rod 33g.

[0040] When the clamping plate 33d contacts the rotor surface, the inclined slider 32 adaptively slides along the sliding groove 33f, guided by the limit rod 33g. The telescopic spring 33h provides an initial preload, ensuring flexible contact between the inclined slider 32 and the rotor surface, preventing hard impact. If the rotor is eccentric, the clamping plate 33d, with less resistance, automatically adjusts the clamping force due to the difference in compression of the spring 33h, achieving passive load balancing. Groove D limits the relative movement of the central cone 31 and the connecting block C, preventing mechanical damage caused by overload. When the clamping force exceeds a set threshold, the elastic deformation of the connecting block C triggers a pressure sensor, and the telescopic cylinder 33a automatically switches to pressure-holding mode. When the clamping plate 33d contacts the rotor surface, the inclined slider 32 adaptively slides along the sliding groove 33f, guided by the limit rod 33g. The telescopic spring 33h provides an initial preload, ensuring flexible contact between the inclined slider 32 and the rotor surface, preventing hard impact. If the rotor is eccentric, the clamping plate 33d, with less resistance, automatically adjusts the clamping force due to the difference in compression of the spring 33h, achieving passive load balancing. Groove D limits the relative movement of the central cone 31 and the connecting block C, preventing mechanical damage caused by overload. When the clamping force exceeds a set threshold, the elastic deformation of the connecting block C triggers a pressure sensor, and the telescopic cylinder 33a automatically switches to pressure-holding mode.

[0041] It should be noted that when the generator needs to be removed for maintenance, the generator is pushed onto the sliding plate 21, and then the motor is preliminarily fixed by the fixings on the sliding plate 21. The motor can also be installed on the sliding plate 21 by hoisting, and the cylinder 23 is started. The sliding block 24 is lifted by the cylinder 23 to drive the sliding plate 21 to deflect. Since the pin rod 22 is inserted into the pin groove to fix the sliding plate 21, the sliding plate 21 is set at an angle, and then the hoisted generator is moved into the sliding plate 21, and then the generator is preliminarily limited by the fixings on the sliding plate 21, and then the cylinder 23 is started again to drive the sliding plate 21 to a straight state.

[0042] Then the telescopic cylinder 33a is started, and the clamping unit 33 is driven to move downward by the telescopic cylinder 33a. When the clamping unit 33 moves downward, its central cone 31 is squeezed and moves toward the groove D, thereby pulling the clamping plate 33d toward the center. Since the inclined slider 32 can slide on the clamping plate 33d, the clamping position can be adjusted according to the shape of the object. The inclined slider 32 will slide when it clamps an object, and will not move if it does not clamp an object. Therefore, when the clamping unit 33 contacts the generator, the inclined slider 32 slides in the sliding groove 33f, and the clamping unit that does not contact the object remains in place due to the action of the telescopic spring 33h, realizing passive self-adaptation.

[0043] Since the central cone 31 has a curved surface B, the curved surface B allows the clamping plate 33d to smoothly adjust its angle during radial movement to adapt to the taper or curved profile of the generator rotor. The inclined surface A efficiently converts the axial pressure (from the telescopic cylinder 33a) into radial clamping force, reducing energy loss, and the groove D prevents excessive displacement of the central cone 31 from causing loss of control of the clamping force, while allowing slight elastic deformation to compensate for manufacturing tolerances or assembly errors.

[0044] Finally, it should be pointed out that the methods and devices described in detail above are merely embodiments, and those skilled in the art can modify these embodiments in different ways without departing from the scope of the present invention.

Claims

1. A multi-degree-of-freedom mechanical brake device for a wind turbine, characterized by: include, Support element (1); A turning element (2), wherein the turning element (2) is arranged on the top end of the supporting element (1); and A clamping element (3), the clamping element (3) being located at the top end of the flip element (2); The clamping element (3) includes a central cone (31), which is movably arranged in the axial direction. The outer cone surface of the central cone (31) cooperates with the inclined slider (32), so that the axial movement of the central cone (31) drives the clamping jaw unit (33) to synchronously extend and retract radially, thereby realizing self-centering clamping.

2. The multi-degree-of-freedom mechanical brake device for a wind turbine according to claim 1, characterized in that: The support element (1) comprises a support frame (11), a side wall of the support frame (11) is provided with a cross bar (12), and the cross bar (12) is used to be connected to the flip element (2).

3. The multi-degree-of-freedom mechanical brake device for a wind turbine according to claim 2, characterized in that: The flip element (2) comprises a sliding plate (21) arranged at the top end of the crossbar (12), wherein the sliding plate (21) is reinforced by transverse reinforcing ribs.

4. The multi-degree-of-freedom mechanical brake device for a wind turbine according to claim 3, characterized in that: A pin rod (22) is provided at the bottom end of the sliding plate (21), and the pin rod (22) is inserted into the pin groove of the side wall of the support frame (11) to limit the sliding plate (21).

5. The multi-degree-of-freedom mechanical brake device for a wind turbine according to claim 4, characterized in that: A cylinder (23) is installed at the top of the support frame (11), and the end of the piston rod of the cylinder (23) is connected to a sliding block (24), and the sliding block (24) is connected to the support frame (11) in a sliding manner.

6. The multi-degree-of-freedom mechanical brake device for a wind turbine according to claim 5, characterized in that: The clamping claw unit (33) comprises a telescopic cylinder (33a) arranged at the bottom end of the support frame (11), and the piston rod end of the telescopic cylinder (33a) is connected to the mounting plate (33b).

7. The multi-degree-of-freedom mechanical brake device for a wind turbine according to claim 6, characterized in that: Two groups of hinged plates (33c) are installed on the side wall of the installation plate (33b), and the two groups of hinged plates (33c) are respectively connected to the bottom end and the side wall of the clamping plate (33d).

8. The multi-degree-of-freedom mechanical brake device for a wind turbine according to claim 7, characterized in that: The clamping jaw unit (33) further comprises a return spring shaft (33e) which is arranged between the hinge plate (33c) and the clamping plate (33d) and is used to automatically retract the clamping jaw unit (33) when the clamping is released.

9. The multi-degree-of-freedom mechanical brake device for a wind turbine according to claim 8, characterized in that: The clamping plate (33d) is provided with an inclined surface (A), and the central cone (31) is provided with a radian surface (B), wherein the connecting block (C) of the central cone (31) and the clamping plate (33d) are both made of elastic material, wherein the connecting block (C) and the central cone (31) are hinged, and the movement range of the central cone (31) and the connecting block (C) is limited by the groove (D).

10. The multi-degree-of-freedom mechanical brake device for a wind turbine according to claim 8, characterized in that: The clamping jaw unit (33) further comprises a sliding groove (33f) arranged on the inner wall of the clamping plate (33d), a limiting rod (33g) is installed inside the sliding groove (33f), the inclined sliding block (32) is sleeved on the side wall of the limiting rod (33g), and a telescopic spring (33h) is sleeved between the inclined sliding block (32) and the limiting rod (33g).

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