Yaw braking device, yaw system and wind generating set

Abstract

The invention provides a yaw braking device, a yaw system and a wind generating set, the wind generating set comprises a tower and a base rotatably arranged at the top of the tower, the base is provided with a connecting hole used for installing a compression column type brake, and the yaw braking device comprises a clamp type brake and a connecting module; the clamp type brake comprises a brake body and a brake disc, the connecting module comprises a connecting column and a brake fixing seat, the brake fixing seat is arranged below the base and fills the space where a friction plate of the compression column type brake is located in the height direction of the tower, and the connecting column is arranged in the connecting hole and extends to the position below the base. One of the brake body and the brake disc is connected to the base through the brake fixing base, the other one of the brake body and the brake disc is connected to the tower, a clamp type brake can be arranged on the base without additional modification on the basis of an original wind generating set, hydraulic oil leakage can be avoided, and the braking effect can be improved.

Description

Technical Field

[0001] The present disclosure belongs to the technical field of wind power generation, and in particular relates to a yaw brake device, a yaw system and a wind turbine generator set. Background Art

[0002] In order to improve the wind energy utilization efficiency of the wind turbine generator set, the wind turbine generator set includes a yaw system, which can control the rotation of the impeller relative to the tower to face the wind direction, thereby effectively improving the power generation efficiency.

[0003] The yaw system usually includes a yaw drive device and a yaw brake. The yaw drive device drives the entire wind turbine to realize functions such as yaw to the wind. The yaw brake provides braking torque to prevent the wind turbine from uncontrolled yaw when the wind speed is too high. At the same time, it provides a certain yaw damping torque when unwinding, so that the wind turbine runs smoothly when unwinding.

[0004] At present, some yaw brakes use a pressure column brake, which includes a brake and a friction plate. A piston is provided inside the brake. The main principle of the pressure column brake is that the piston extends from the brake under the pressure of the hydraulic oil and pushes the friction plate to move toward the inner ring of the yaw bearing. The function of the friction plate is to convert the thrust of the hydraulic oil into braking force, thereby generating braking force on the inner ring of the bearing.

[0005] The piston moves frequently in the brake, and the piston often tilts and causes oil leakage, which directly affects the braking effect of the yaw brake. Summary of the Invention

[0006] The main purpose of the present disclosure is to provide a yaw brake device, a yaw system and a wind turbine generator set, which can avoid oil leakage during the operation of the yaw brake device, thereby improving the braking effect.

[0007] To achieve the above objectives, the present disclosure provides the following technical solutions:

[0008] In one aspect of the present disclosure, a yaw brake device is provided, which is suitable for a wind turbine generator set, wherein the wind turbine generator set includes a tower and a base rotatably arranged on the top of the tower, the base is provided with a connecting hole for installing a pressure column brake, the yaw brake device includes a clamping brake and a connecting module, the clamping brake includes a brake body and a brake disc, the connecting module includes a connecting column and a brake fixing seat, the brake fixing seat is arranged below the base and fills the space where the friction plate of the pressure column brake is located along the height direction of the tower, the connecting column is arranged in the connecting hole and the connecting column extends to the bottom of the base and is connected to the brake fixing seat, one of the brake body and the brake disc is connected to the base through the brake fixing seat, and the other is connected to the tower.

[0009] The brake fixing seat provided by the present invention is arranged below the base and fills the space where the friction plate of the original pressure column type brake is located along the height direction of the tower. The connecting column is arranged in the connecting hole for setting the pressure column type brake. In this way, on the basis of the wind turbine generator set originally provided with the pressure column type brake, a clamp type brake can be set on the base without making additional changes, which can avoid hydraulic oil leakage and thus improve the braking effect of the yaw brake device.

[0010] In an exemplary embodiment of the present disclosure, the caliper brake comprises a hydraulic caliper brake; and / or the caliper brake is provided in a plurality, the plurality of caliper brakes being spaced apart along the circumference of the tower. The yaw brake device further comprises an auxiliary connector connected between the plurality of caliper brakes. By connecting the auxiliary connectors between the plurality of caliper brakes, the present disclosure reduces vibration of the caliper brake, thereby improving the reliability of the yaw brake device.

[0011] Optionally, the connection module further includes a clamping bolt, the connection column is provided with a flange, the flange is located above the base along the height direction of the tower, the clamping bolt is provided on the flange, and the clamping bolt abuts against the base.

[0012] The present invention provides a flange on the connecting column and sets a clamping bolt on the flange, and compresses the base and the brake fixing seat along the height direction of the tower through the clamping bolt, thereby preventing the brake fixing seat from shaking relative to the base and improving the connection reliability of the brake fixing seat.

[0013] Specifically, the connecting module also includes a sleeve, which is sleeved on the outer circumference of the connecting column and is arranged between the base and the clamping bolt, and the two ends of the sleeve are respectively pressed against the base and the clamping bolt. The sleeve can evenly transmit the force of the clamping bolt along the height direction of the tower to the bottom end of the base, so that the base and the brake fixing seat are evenly stressed along the circumference of the connecting column, thereby improving the connection reliability among the brake fixing seat, connecting column, sleeve and base.

[0014] In an optional embodiment, the bottom end of the connecting column is threadedly connected to the brake fixing seat, which has a simple structure and reduces the manufacturing cost of the yaw brake device.

[0015] In an optional embodiment, the flange is provided with a first internally threaded hole, the clamping bolt is provided with a first external thread, and the yaw brake device further includes a threaded sleeve, the threaded sleeve being provided with a second external thread that matches the first internally threaded hole, and a second internal thread that matches the first external thread, such that the threaded sleeve is disposed within the first internally threaded hole and sleeved over the clamping bolt. When adjusting the preload force, the clamping bolt is rotated to rotate the clamping bolt relative to the threaded sleeve, eliminating the need for frequent adjustment between the threaded sleeve and the connecting column. When the second internal thread of the threaded sleeve is severely worn, the threaded sleeve can be replaced without replacing the connecting column, thereby reducing the operation and maintenance costs of the yaw brake device.

[0016] In another exemplary embodiment of the present disclosure, a first limiting portion is provided on the top surface of the brake fixing seat, and a second limiting portion matching the first limiting portion is provided on the bottom surface of the base, and one of the first limiting portion and the second limiting portion is a convex portion, and the other is a concave portion.

[0017] This embodiment matches the first limiting portion with the second limiting portion to limit the radial movement of the brake fixing seat relative to the base along the connecting column, further improving the connection reliability between the brake fixing seat and the connecting column, and between the base and the brake fixing seat.

[0018] Optionally, a first threaded portion is provided at the bottom end of the connecting post, and a second threaded portion matching the first threaded portion is provided at the first end of the brake mounting base. The brake mounting base extends from the first end into the inner cavity of the tower, and a second end of the brake mounting base, opposite the first end, is located inside the base. One of the brake body and the brake disc is connected to the second end. In this embodiment, by extending the brake mounting base to the inside of the base, the installation space for the caliper brake is increased, thereby facilitating installation of the caliper brake.

[0019] Specifically, the brake body is connected to the second end, the brake disc is connected to the tower, the brake body includes two symmetrically arranged clamps, a brake clamp is provided between the two clamps, the brake disc extends to the brake clamp, and the two clamps can clamp the brake disc.

[0020] On the other hand, the present disclosure provides a yaw system, which includes a yaw bearing and the yaw brake device as described above, wherein the yaw bearing is arranged between the tower and the base, and the brake fixing seat is arranged above the yaw bearing along the height direction of the tower. The present disclosure fills the space between the yaw bearing and the brake fixing seat through the brake fixing seat, and no additional changes are required on the basis of the wind turbine generator set originally provided with a pressure column brake, thereby reducing the modification cost of the wind turbine generator set.

[0021] According to an exemplary embodiment of the present disclosure, the brake fixing seat extends from the connecting column to the inner cavity of the tower, the brake body is connected to the inner side of the brake fixing seat and is located below the brake fixing seat, the brake body has a brake clamp, and the brake disc is arranged below the yaw bearing and extends to the brake clamp.

[0022] In another aspect of the present disclosure, a wind turbine generator set is provided, wherein the wind turbine generator set comprises the yaw system as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and / or other objects and advantages of the present disclosure will become more apparent through the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0024] Figure 1 A partial cross-sectional view of a yaw brake system provided by an exemplary embodiment of the present disclosure.

[0025] Figure 2 for Figure 1 A partial enlarged view of the structure indicated by circle I.

[0026] Description of reference numerals:

[0027] 1. Clamp brake; 2. Yaw bearing;

[0028] 3. Connecting module; 4. Base;

[0029] 5. Tower; 6. Platform inside the base;

[0030] 7. Housing; 8. Auxiliary connecting parts;

[0031] 9. Chassis;

[0032] 10. Nacelle; 12. Brake body;

[0033] 13. Brake connecting seat; 14. Connecting bolts;

[0034] 15. Brake disc; 21. Bearing inner ring;

[0035] 22. Bearing outer ring; 31. Connecting column;

[0036] 32. Sleeve; 33. Clamping bolt;

[0037] 34. Brake fixing seat; 35. Flange. DETAILED DESCRIPTION

[0038] Example embodiments will now be described more fully with reference to the accompanying drawings. However, it should not be understood that the embodiments of the present disclosure are limited to the embodiments described herein. The same reference numerals in the figures represent the same or similar structures, and thus their detailed description will be omitted.

[0039] Reference Figure 1 The present disclosure provides a wind turbine generator set, which includes a tower 5, a base 4 arranged on the top of the tower 5, and a yaw system. Under the control of the yaw system, the base 4 can rotate relative to the tower 5 and keep the impeller in a windward state, thereby improving the efficiency of wind energy utilization.

[0040] In this embodiment, the wind turbine generator set includes a nacelle 10, which is rotatably arranged on the top of the tower 5. The nacelle 10 includes a chassis 9 and a shell 7 connected to the chassis 9. The chassis 9 includes a base 4 that is roughly annular along the circumference of the tower 5 and an inner platform 6 of the base arranged on the inner ring side of the base 4.

[0041] The yaw system includes a yaw brake device, which is used to provide damping for the rotation of the base 4 relative to the tower 5 to prevent the base 4 from rotating too fast. It can also keep the base 4 in a windward state without deflection, thereby improving the reliability of the wind turbine.

[0042] In the prior art, the yaw brake device includes a yaw brake that uses a pressure column brake to provide braking force to the base 4. However, since the pressure column brake includes a piston, a gap is provided between the piston and the brake to allow the piston to move smoothly. In addition, the pressure column brake requires a high hydraulic oil pressure, which can easily lead to hydraulic oil leakage, thereby affecting the braking effect.

[0043] Reference Figure 1 and Figure 2 , an exemplary embodiment of the present disclosure provides a yaw brake device, which is suitable for a wind turbine generator set, wherein a connecting hole for installing the above-mentioned pressure column brake is provided on the base 4 of the wind turbine generator set, and the yaw brake device includes a clamp brake 1 and a connecting module 3, the clamp brake 1 includes a brake body 12 and a brake disc 15, the connecting module 3 includes a connecting column 31 and a brake fixing seat 34, the brake fixing seat 34 is arranged below the base 4, and fills the space where the friction plate of the pressure column brake is located along the height direction of the tower 5, the connecting column 31 is arranged in the connecting hole and the connecting column 31 extends to the bottom of the base 4 and is connected to the brake fixing seat 34, one of the brake body 12 and the brake disc 15 is connected to the base 4 through the brake fixing seat 34, and the other is connected to the tower 5.

[0044] In this embodiment, the brake fixing seat 34 is arranged below the base 4 and fills the space where the friction plate of the original pressure column brake is located along the height direction of the tower 5. The connecting column 31 is arranged in the connecting hole for setting the pressure column brake. In this way, on the basis of the wind turbine generator set originally equipped with the pressure column brake, the clamp brake 1 can be set on the base 4 without making additional changes, which can avoid hydraulic oil leakage and thus improve the braking effect of the yaw brake device.

[0045] The present invention provides a connecting post 31 in a connection hole originally used to install a pressure column brake. The top end of the connecting post 31 is positioned above the base 4, and the bottom end of the connecting post 31 passes through the connection hole and connects to a brake mounting base 34. This provides a mounting platform for the brake body 12 or brake disc 15 of the caliper brake 1 by providing the brake mounting base 34. This makes it possible to use the caliper brake 1 to provide braking force, effectively preventing hydraulic oil leakage, and thus improving the braking effect of the yaw brake device. Furthermore, based on a wind turbine generator set originally equipped with a pressure column brake, the newly added brake mounting base 34 provides a mounting platform for the caliper brake 1 by utilizing the connection hole for installing the pressure column brake. This eliminates the need to modify the base 4 originally used to connect the pressure column brake, thereby reducing the cost of modifying the wind turbine generator set.

[0046] As an example, the caliper brake 1 includes a hydraulic caliper brake, but is not limited thereto.

[0047] In order to make the yaw brake device have a greater braking force, the caliper brake 1 includes a plurality of caliper brakes 1, which are arranged at intervals along the circumference of the tower 5. As needed, the number of caliper brakes 1 is 4-8, but not limited thereto.

[0048] To improve the reliability of the yaw brake system and prevent vibration during operation of the caliper brake 1, the yaw brake system also includes an auxiliary connector 8. The auxiliary connector 8 is connected between the multiple caliper brakes 1. This interconnects the multiple caliper brakes 1, preventing vibration of individual caliper brakes 1 during operation. By way of example, the auxiliary connector 8 is an annular plate extending circumferentially around the tower 5. Alternatively, the auxiliary connector 8 is positioned below the caliper brake 1, but this is not limiting.

[0049] Optionally, a yaw bearing 2 is disposed between the tower 5 and the base 4. A brake holder 34 is disposed along the height of the tower 5 and fills the space between the yaw bearing 2 and the base 4. This space can be utilized to accommodate the brake holder 34 after the friction pads of the pressure-column brake are removed, effectively improving the space utilization of the yaw brake device. However, the present invention is not limited to this embodiment. In a wind turbine generator set that originally employed a pressure-column brake, after the friction pads are removed, the space where the friction pads were located can be utilized to connect the brake holder 34, thereby reducing modifications to the wind turbine generator set and thereby lowering the cost of wind turbine reconstruction.

[0050] Continue to refer to Figure 2 The connection module 3 also includes a clamping bolt 33. The connection column 31 is provided with a flange 35. The flange 35 is located above the base 4 along the height direction of the tower 5. The clamping bolt 33 is provided on the flange 35, and the clamping bolt 33 is against the base 4.

[0051] The present invention provides a flange 35 on the connecting column 31 and a clamping bolt 33 on the flange 35, and compresses the base 4 and the brake fixing seat 34 along the height direction of the tower 5 through the clamping bolt 33, thereby preventing the brake fixing seat 34 from shaking relative to the base 4 and improving the connection reliability of the brake fixing seat 34.

[0052] As an example, the brake fixing seat 34 and the bottom end of the connecting column 31 can be connected by welding or by threading. This embodiment is described by taking the threaded connection between the brake fixing seat 34 and the connecting column 31 as an example. Specifically, the bottom end of the connecting column 31 is provided with an external thread, and the brake fixing seat 34 is provided with a threaded hole that matches the bottom end of the connecting column 31. In this way, the bottom end of the connecting column 31 can be screwed into the threaded hole of the brake fixing seat 34 to achieve a threaded connection between the connecting column 31 and the brake fixing seat 34. As needed, the top of the brake fixing seat 34 is provided with an upwardly protruding threaded column (not shown), and the bottom end of the connecting column 31 is provided with a threaded hole that matches the threaded column, which is also within the scope of protection of this disclosure.

[0053] In order to improve the uniformity of the force applied to the connecting column 31 in the circumferential direction, a plurality of clamping bolts 33 can be provided, and the plurality of clamping bolts 33 can be evenly arranged along the circumference of the connecting column 31, but the present invention is not limited thereto. Furthermore, a flange 35 is provided at the top of the connecting column 31, but the present invention is not limited thereto. As required, the flange 35 can be provided at the middle of the connecting column 31 along the height direction of the tower 5 (not shown in the figure), but the present invention is not limited thereto. In an optional embodiment, the flange 35 and the connecting column 31 can be integrally formed, or they can be formed separately and then the flange 35 is fixed to the connecting column 31, but the present invention is not limited thereto.

[0054] In order to further improve the force uniformity of the connecting column 31, the connecting module 3 also includes a sleeve 32, which is sleeved on the outer periphery of the connecting column 31 and is arranged between the base 4 and the clamping bolt 33, and the two ends of the sleeve 32 respectively press against the base 4 and the clamping bolt 33.

[0055] In this embodiment, the bottom end of the sleeve 32 extends continuously along the circumference of the connecting column 31 and is in continuous contact with the bottom end of the base 4. The sleeve 32 can evenly transmit the force of the clamping bolt 33 along the height direction of the tower 5 to the bottom end of the base 4, so that the base 4 and the brake fixing seat 34 are evenly stressed along the circumference of the connecting column 31, thereby improving the connection reliability among the brake fixing seat 34, the connecting column 31, the sleeve 32 and the base 4.

[0056] Continue to refer to Figure 2 In this embodiment, the flange 35 is fixed to the top of the connecting column 31, and the sleeve 32 is arranged below the flange 35. The tightening bolt 33 is inserted into the flange hole of the flange from the top of the flange 35 and presses against the top of the sleeve 32. The bottom end of the sleeve 32 presses against the base 4. The bottom end of the connecting column 31 is screwed into the threaded hole of the brake fixing seat 34. The tightening bolt 33 is screwed to adjust the tightening force between the tightening bolt 33 and the sleeve 32, so that the pre-tightening force between the brake fixing seat 34 and the base 4 can be adjusted to prevent the brake fixing seat 34 from loosening relative to the connecting column 31.

[0057] Specifically, in this embodiment, after the clamping bolt 33 is tightened, a thrust is generated to push the sleeve 32 to move downward to clamp the base 4. Since a first internal thread is provided in the flange hole of the flange plate 35, when the clamping bolt 33 is screwed downward, the connecting column 31 will drive the brake fixing seat 34 to move upward, so that the brake fixing seat 34 and the base 4 are in close contact, which can play an anti-loosening role between the brake fixing seat 34 and the connecting column 31.

[0058] In order to improve the connection reliability between the clamping bolt 33 and the connecting column 31 , the flange hole and the clamping bolt 33 are threadedly matched, but the present invention is not limited thereto.

[0059] In order to improve the service life of the yaw brake device, the flange 35 includes a first internal threaded hole, that is, a first internal thread is provided in the flange hole of the flange 35, and the clamping bolt 33 is provided with a first external thread. The yaw brake device also includes a threaded sleeve, which is provided with a second external thread and a second internal thread. The second external thread matches the first internal thread, and the second internal thread matches the first external thread, so that the threaded sleeve is arranged between the clamping bolt 33 and the connecting column 31, that is, the threaded sleeve is arranged in the first internal threaded hole of the flange 35 and is sleeved outside the clamping bolt 33.

[0060] When adjusting the preload force, the tightening bolt 33 is rotated to rotate the tightening bolt 33 relative to the threaded sleeve. Frequent adjustment is not required between the threaded sleeve and the connecting column 31. When the second internal thread of the threaded sleeve is severely worn, the threaded sleeve can be replaced without replacing the connecting column 31, thereby reducing the operation and maintenance cost of the yaw brake device.

[0061] In order to further improve the connection reliability of the brake fixing seat 34, the top surface of the brake fixing seat 34 is provided with a first limiting portion, and the bottom surface of the base 4 is provided with a second limiting portion matching the first limiting portion, and one of the first limiting portion and the second limiting portion is a convex portion, and the other is a concave portion.

[0062] This embodiment matches the first limiting portion and the second limiting portion to limit the radial movement of the brake fixing seat 34 relative to the base 4 along the connecting column 31, further improving the connection reliability between the brake fixing seat 34 and the connecting column 31, and between the base 4 and the brake fixing seat 34.

[0063] As an example, this embodiment is described with the first limiting portion being a convex portion and the second limiting portion being a concave portion, but the present invention is not limited thereto. As required, the second limiting portion is an annular groove extending continuously along the circumference of the base 4, and the first limiting portion matches it.

[0064] Continue to refer to Figure 2 The bottom end of the connecting column 31 is provided with a first threaded portion, and the first end of the brake fixing seat 34 is provided with a second threaded portion matching the first threaded portion. The brake fixing seat 34 extends from the first end toward the inner cavity of the tower 5, and the second end of the brake fixing seat 34 is located on the inner side of the base 4. One of the brake body 12 and the brake disc 15 is connected to the second end of the brake fixing seat 34, but is not limited to this.

[0065] In this embodiment, the second end of the brake fixing seat 34 extends to the inner side of the base 4 , thereby increasing the installation space of the caliper brake 1 and providing a possibility for the installation of the caliper brake 1 .

[0066] Continue to refer to Figure 2 The brake body 12 is connected to the inner side of the brake fixing seat 34, and the brake disc 15 is connected to the tower 5. For example, but not limited to, the brake disc 15 is arranged below the yaw bearing 2 along the height direction of the tower 5. The brake body 12 includes two symmetrically arranged clamps, and a brake clamp is provided between the two clamps. The brake disc 15 extends to the brake clamp, and the two clamps can clamp the brake disc 15.

[0067] Specifically, a brake connection base 13 is provided between the brake body 12 and the brake mounting base 34. One end of the brake connection base 13 is connected to the brake mounting base 34, and the other end of the brake connection base 13 is connected to the brake body 12, but this is not limited to this. Optionally, a connecting bolt 14 is provided at the second end of the brake mounting base 34. The tail end of the connecting bolt 14 is connected to the brake mounting base 34, and the bolt head of the connecting bolt 14 is located below the brake mounting base 34. Along the height direction of the tower 5, the brake connection base 13 and the brake body 12 are sequentially connected to the connecting bolt 14, that is, the brake connection base 13 and the brake body 12 are respectively connected to the brake mounting base 34 via the connecting bolt 14, but this is not limited to this. Optionally, the length of the connecting bolt 14 along the height direction of the tower 5 can be selected as needed, but this is not limited to this.

[0068] As an example, the brake disc 15 is arranged below the yaw bearing 2 along the height direction of the tower 5, the brake body 12 and the brake disc 15 are arranged opposite to each other, and the brake disc 15 can extend to the brake clamp of the brake body 12, so that the brake disc 15 and the brake body 12 can cooperate to provide braking force to the base 4.

[0069] Optionally, the brake disc 15 includes multiple brake disc units, which are arranged along the circumference of the tower 5, and adjacent brake disc units are connected by welding. Alternatively, in this embodiment, the brake disc 15 includes three brake disc units, which are respectively connected to the tower 5 and connected as a whole by welding.

[0070] The yaw brake device provided in the present disclosure includes multiple caliper brakes 1, which are evenly arranged along the circumference of the tower 5, but the present invention is not limited thereto. As an example, the yaw brake device provided in this embodiment includes 4-8 sets of caliper brakes 1, but the present invention is not limited thereto.

[0071] Another aspect of the present disclosure provides a yaw system comprising a yaw bearing 2 and a yaw brake device as described above. The yaw bearing 2 is disposed between a tower 5 and a base 4. A brake mount 34 is disposed above the yaw bearing 2 along the height of the tower 5. This arrangement allows the brake mount 34 to be positioned between the yaw bearing 2 and the base 4 along the height of the tower 5, thereby improving the space utilization of the wind turbine. Furthermore, the brake mount 34 is disposed below the base 4 and, along the height of the tower 5, fills the space where the friction pad of the original pressure-column brake resides. The connecting column 31 is disposed in a connecting hole for the pressure-column brake. This eliminates the need for additional modifications to a wind turbine already equipped with a pressure-column brake, thereby reducing the cost of retrofitting the wind turbine.

[0072] Continue to refer to Figure 2The yaw bearing 2 includes an inner ring 21 and an outer ring 22. One of the inner ring 21 and the outer ring 22 is connected to the tower 5, and the other is connected to the base 4. This embodiment illustrates an example in which the outer ring 22 is connected to the base 4, while the inner ring 21 is connected to the top of the tower 5. However, this embodiment is not limited to this embodiment. Alternatively, the inner ring 21 can be connected to the base 4, while the outer ring 22 can be connected to the tower 5.

[0073] In another aspect of the present disclosure, a wind turbine generator set is provided, wherein the wind turbine generator set comprises the above yaw system.

[0074] The yaw brake device provided by the present invention is suitable for modifying a wind turbine generator set that uses a pressure column brake. Since the original wind turbine generator set does not have a reserved installation platform for connecting the clamp brake 1, a brake fixing seat 34 is provided below the base 4. The brake fixing seat 34 extends radially along the tower 5 to the inner side of the base 4, thereby providing a connection platform for the clamp brake 1.

[0075] Furthermore, in the original wind turbine generator set, a friction plate is arranged between the yaw bearing 2 and the base 4. After the friction plate is removed, the brake fixing seat 34 can be set with the help of the installation space of the original friction plate, without the need for additional modification, thereby reducing the modification cost of the wind turbine generator set.

[0076] The yaw brake device provided herein utilizes a caliper brake 1, which effectively prevents hydraulic oil leakage during use, thereby improving the braking effect of the yaw brake device. Furthermore, the caliper brake 1 can provide a more suitable braking torque than a column brake, thus making the yaw brake device more versatile.

[0077] In the description of the present disclosure, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present disclosure.

[0078] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of such features. Throughout this disclosure, unless otherwise specified, "plurality" means two or more.

[0079] In the description of this disclosure, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections, electrical connections, or communication connections; they may refer to direct connections or indirect connections through an intermediate medium; they may refer to internal communication between two components or an interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this disclosure based on specific circumstances.

[0080] The features, structures or characteristics described in the present disclosure may be combined in any suitable manner in one or more embodiments. In the above description, many specific details are provided to provide a full understanding of the embodiments of the present disclosure. However, those skilled in the art will appreciate that the technical solutions of the present disclosure may be practiced without one or more of the specific details, or other methods, components, materials, etc. may be adopted. In other cases, known structures, materials or operations are not shown or described in detail to avoid blurring the various aspects of the present disclosure.

Claims

1. A yaw brake device, characterized in that: The invention is applicable to a wind turbine generator set, wherein the wind turbine generator set comprises a tower (5) and a base (4) rotatably arranged on the top of the tower (5), wherein the base (4) is provided with a connection hole for installing a pressure column brake. The yaw braking device comprises: A caliper brake (1), comprising a brake body (12) and a brake disc (15), A connecting module (3) includes a connecting column (31) and a brake fixing seat (34), wherein the brake fixing seat (34) is arranged below the base (4) and fills the space where the friction plate of the pressure column brake is located along the height direction of the tower (5), the connecting column (31) is arranged in the connecting hole and the connecting column (31) extends to the bottom of the base (4) and is connected to the brake fixing seat (34), and one of the brake body (12) and the brake disc (15) is connected to the base (4) through the brake fixing seat (34), and the other is connected to the tower (5).

2. The yaw brake device according to claim 1, characterized in that: There are a plurality of the caliper brakes (1), the plurality of the caliper brakes (1) being arranged at intervals along the circumference of the tower (5), the yaw brake device further comprising an auxiliary connecting member (8), the auxiliary connecting member (8) being connected between the plurality of the caliper brakes (1); and / or, The caliper brake (1) comprises a hydraulic caliper brake.

3. The yaw brake device according to claim 1, wherein: The connection module (3) further includes a clamping bolt (33), the connection column (31) is provided with a flange (35), the flange (35) is located above the base (4) along the height direction of the tower (5), the clamping bolt (33) is provided on the flange (35), and the clamping bolt (33) abuts against the base (4).

4. The yaw braking device according to claim 3, characterized in that: The connecting module (3) further comprises a sleeve (32), the sleeve (32) being sleeved on the outer periphery of the connecting column (31) and the sleeve (32) being arranged between the base (4) and the clamping bolt (33), and the two ends of the sleeve (32) respectively abutting against the base (4) and the clamping bolt (33); and / or, The bottom end of the connecting column (31) is threadedly connected to the brake fixing seat (34); and / or, The flange (35) is provided with a first internal threaded hole, the clamping bolt (33) is provided with a first external thread, and the yaw brake device further includes a threaded sleeve, the threaded sleeve is provided with a second external thread matching the first internal threaded hole, and a second internal thread matching the first external thread, so that the threaded sleeve is provided in the first internal threaded hole and is sleeved outside the clamping bolt (33).

5. The yaw braking device according to any one of claims 1 to 4, characterized in that: The top surface of the brake fixing seat (34) is provided with a first limiting portion, and the bottom surface of the base (4) is provided with a second limiting portion matching the first limiting portion, wherein one of the first limiting portion and the second limiting portion is a convex portion and the other is a concave portion.

6. The yaw braking device according to any one of claims 1 to 4, characterized in that: The bottom end of the connecting column (31) is provided with a first threaded portion, the first end of the brake fixing seat (34) is provided with a second threaded portion matching the first threaded portion, the brake fixing seat (34) extends from the first end toward the inner cavity of the tower (5), and the second end of the brake fixing seat (34) opposite to the first end is located on the inner side of the base (4), and one of the brake body (12) and the brake disc (15) is connected to the second end.

7. The yaw braking device according to claim 6, characterized in that: The brake body (12) is connected to the second end, the brake disc (15) is connected to the tower (5), the brake body (12) includes two symmetrically arranged clamps, a brake clamping opening is provided between the two clamps, the brake disc (15) extends to the brake clamping opening, and the two clamps are capable of clamping the brake disc (15).

8. A yaw system, characterized in that: The yaw system comprises a yaw bearing (2) and a yaw brake device according to any one of claims 1 to 4, wherein the yaw bearing (2) is arranged between the tower (5) and the base (4), and along the height direction of the tower (5), the brake fixing seat (34) is arranged above the yaw bearing (2).

9. The yaw system according to claim 8, characterized in that The brake fixing seat (34) extends from the connecting column (31) to the inner cavity of the tower (5), the brake body (12) is connected to the inner side of the brake fixing seat (34) and is located below the brake fixing seat (34), the brake body (12) has a brake clamp, and the brake disc (15) is arranged below the yaw bearing (2) and extends to the brake clamp.

10. A wind turbine generator set, characterized in that: The wind turbine generator set comprises the yaw system according to claim 8 or 9.

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