Yaw braking device and yaw system

Abstract

The invention relates to a wind generating set, in particular to a yaw braking device which comprises a braking device body arranged on a rack, the braking device body comprises a braking assembly and a driving assembly, and the driving assembly can drive the braking assembly to approach a tower drum flange so as to abut against the inner wall of the tower drum flange. According to the yaw braking device, by arranging the braking device, the braking assembly abuts against the tower drum flange, the situation that the braking effect is poor due to the fact that the yaw friction coefficient is reduced due to carbon powder accumulation is avoided, and the yaw braking effect and safety are improved.

Description

Technical Field

[0001] The present invention relates to a wind turbine generator set, in particular to a yaw braking device, and further to a yaw system having the yaw braking device. Background Art

[0002] In the current wind power industry, wind turbines will experience slight free deflection oscillations, so it is necessary to perform yaw braking on the wind turbines, such as Figures 1 to 3 As shown, the existing yaw brake mainly adopts disc brake, which is composed of a brake ring B connected to the tower and a brake caliper with an edge clamp. The brake caliper is connected to the wind turbine frame, and the brake disc is connected to the tower. The brake caliper A is always under pressure to provide yaw damping. The high-pressure brake oil pushes the piston of the oil cylinder to move, and the friction material contacts the brake ring to clamp the brake ring, thereby producing a braking effect.

[0003] However, the following problems may occur during actual operation: 1. Frequent yaw causes the friction material to gradually wear out, resulting in a large amount of carbon powder accumulating on the yaw brake disc. In addition, the lubricating grease of the yaw bearing leaks onto the yaw brake disc, and the carbon powder mixes with the grease, resulting in a decrease in the yaw friction coefficient and poor yaw braking effect. The yaw brake disc often fails to brake; 2. Carbon powder enters the contact surface between the friction material and the yaw brake disc. Under long-term pressure and yaw conditions, the surface of the friction material hardens, the friction coefficient decreases, and a good braking effect cannot be achieved. The noise increases, and the surface hardening causes abnormal wear of the yaw brake disc, wear grooves appear on the surface of the brake disc, and the brake disc wears and becomes thinner; 3. When the thickness of the yaw brake disc is less than 25mm, there will be a safety risk and the yaw brake disc needs to be replaced. If the yaw brake disc is severely worn and needs to be replaced, a crane needs to be used to lift the entire nacelle of the wind turbine and then replace the yaw brake disc. During the entire yaw brake disc replacement process, the cost of the crane entering the site for replacement is much higher than the value of the yaw brake disc itself, resulting in a large amount of replacement costs; 4. During the daily inspection of the wind turbine, it is extremely inconvenient to inspect the friction material of the yaw brake pad, and it is impossible to directly observe the degree of wear of the friction material.

[0004] Therefore, it is necessary to design a new type of yaw brake device. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a yaw braking device, which can prevent carbon powder from accumulating, improve the yaw braking effect, and improve the safety of use.

[0006] In order to achieve the above-mentioned purpose, the first aspect of the present invention provides a yaw brake device, including a brake device arranged on a frame, the brake device includes a brake assembly and a drive assembly, and the drive assembly can drive the brake assembly toward the tower flange so as to abut against the inner wall of the tower flange.

[0007] Preferably, the driving assembly includes a driving member, a telescopic member and a base mounted on the frame, the telescopic member is telescopically connected to the base through the driving member, the end of the telescopic member away from the base is connected to the brake assembly, and the driving member pushes the brake assembly toward the tower flange through the telescopic member.

[0008] Preferably, the driving component is a hydraulic station, and the base is provided with the pressure oil circuit and a return oil circuit capable of transporting the hydraulic oil back to the hydraulic station. The hydraulic station is connected to one end of the pressure oil circuit so as to supply oil to the inside of the pressure oil circuit to push the telescopic component to move toward the tower flange. The hydraulic station forms a hydraulic oil circulation loop through the pressure oil circuit and the return oil circuit.

[0009] Preferably, a sealing structure is provided between the telescopic member and the base, and the sealing structure is a sealing ring.

[0010] Preferably, the pressure oil circuit includes a first pressure oil circuit and a second pressure oil circuit, one end of the first pressure oil circuit is connected to the hydraulic station, and the other end of the first pressure oil circuit is connected to the telescopic member, one end of the second pressure oil circuit is connected to the hydraulic station, and the other end of the second pressure oil circuit is connected to the telescopic member.

[0011] Preferably, at least six braking devices and at least one hydraulic station are included, and the pressure oil circuit and the return oil circuit of each braking device are respectively connected to the hydraulic station.

[0012] Preferably, the brake assembly includes a brake member and a connecting member, the working surface of the brake member facing the tower flange can fit with the inner wall of the tower flange, and the brake member is connected to the telescopic member through the connecting member.

[0013] Preferably, an annular protruding structure is formed on one end of the base facing the brake assembly, and the outer peripheral surface of the brake assembly can contact the inner wall of the annular protruding structure.

[0014] The second aspect of the present invention also discloses a yaw system, comprising a yaw mechanism, a tower, a frame and a yaw brake device according to any one of the above technical solutions, wherein the yaw mechanism comprises a yaw bearing inner ring and a yaw bearing outer ring, the yaw bearing inner ring is connected to the tower, the yaw bearing outer ring is connected to the frame, the yaw brake device is installed on the frame, and the tower flange is fixedly installed on the yaw bearing inner ring.

[0015] Preferably, a yaw friction layer is formed on the inner wall of the tower flange.

[0016] Through the above technical scheme, a yaw brake device provided by the present invention sets a brake device to make the brake assembly abut against the tower flange, thereby avoiding poor braking effect caused by the reduction of yaw friction coefficient due to carbon powder accumulation, thereby improving the effect and safety of yaw braking. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is one of the structural diagrams of the existing yaw brake device in the background technology; Figure 2 This is the second structural diagram of the existing yaw brake device in the background technology; Figure 3 This is the third structural diagram of the existing yaw brake device in the background technology; Figure 4 It is a structural schematic diagram of a rack according to a specific embodiment of the present invention; Figure 5 It is an enlarged schematic diagram of the structure at A of a specific embodiment of the present invention; Figure 6 is a schematic structural diagram of a yaw brake device according to a specific embodiment of the present invention; Figure 7 It is an enlarged schematic diagram of the structure at B of a specific embodiment of the present invention; Figure 8 is a front view of a braking device according to a specific embodiment of the present invention; Fig. 9 is a schematic structural diagram of a braking device according to a specific embodiment of the present invention; Fig.10 is a cross-sectional schematic diagram of a braking device according to a specific embodiment of the present invention; Fig.11 is a rear view of a braking device according to a specific embodiment of the present invention; Fig.12 It is a schematic side structural diagram of a braking device according to a specific embodiment of the present invention.

[0018] Description of Reference Numerals 1. Frame; 2. Braking device; 21. Braking assembly; 211. Braking member; 22. Driving assembly; 221. Driving member; 222. Telescopic member; 223. Base; 224. Pressure oil circuit; 2241. First pressure oil circuit; 2242. Second pressure oil circuit; 225. Return oil circuit; 3. Tower; 31. Tower flange; 32. Yaw friction layer; 4. Annular protruding structure; 5. Yaw mechanism; 51. Yaw bearing inner ring; 52. Yaw bearing outer ring. DETAILED DESCRIPTION

[0019] The specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention, and the protection scope of the present invention is not limited to the following specific embodiments.

[0020] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "disposed", "provided with", "installed", "matched", and "connected" should be understood in a broad sense. For example, the connection can be a direct connection or an indirect connection through an intermediate connector, and can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] In addition, the terms "first", "second", and "first" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second", and "second" may explicitly or implicitly include one or more features.

[0022] See also Figures 4 to 7 In a first aspect, the present invention provides a yaw brake device, including a brake device 2 arranged on a frame 1, the brake device 2 includes a brake assembly 21 and a drive assembly 22, and the drive assembly 22 can drive the brake assembly 21 to approach the tower flange 31 so as to be able to abut against the inner wall of the tower flange 31.

[0023] It should be noted that the yaw brake device provided by the present invention can prevent carbon powder accumulation and extend the service life, and has a simple structure and is easy to observe and replace, thereby improving the safety of use and reducing the replacement cost.

[0024] It is understandable that if Figures 4 to 7As shown, the axis of the tower flange 31 is perpendicular to the ground. After the yaw system of the wind turbine generator set controls the frame 1 to complete the yaw work, braking is required to position the frame 1. The driving component 22 on the frame 1 can drive the brake component 21 to approach the tower flange 31 until it is against the inner wall of the tower flange 31, and provide a friction force opposite to the yaw movement direction to the frame 1. The frame 1 is braked by increasing the friction. During this process, the frame 1 will be worn due to the friction of the brake component 21 and produce carbon powder. Since the axis of the tower flange 31 is perpendicular to the ground, the carbon powder produced by friction can fall naturally due to its own gravity and will not accumulate, thereby avoiding poor braking effect caused by a decrease in the yaw friction coefficient due to the accumulation of carbon powder, thereby improving the effect and safety of yaw braking.

[0025] As some specific embodiments of the present invention, Figures 7 to 12 As shown, the driving component 22 includes a driving member 221, a telescopic member 222 and a base 223 installed on the frame 1. The telescopic member 222 is telescopically connected to the base 223 through the driving member 221. The end of the telescopic member 222 away from the base 223 is connected to the brake component 21. The driving member 221 pushes the brake component 21 to move toward the tower flange 31 through the telescopic member 222. A base 223 is installed on the frame 1. Since a driving member 221 and a telescopic member 222 are provided on the base 223, the telescopic member 222 can be driven by the driving member 221 to move in the direction of the tower flange 31, so as to control the brake assembly 21 to resist the inner wall of the tower flange 31 and continuously apply abutting force to the inner wall of the tower flange 31 until the frame 1 is stopped from continuing to yaw. Specifically, the present invention brakes the frame 1 by providing a friction force in the opposite direction of the yaw direction to the frame 1. During this process, the frame 1 will be worn due to the friction of the brake assembly 21, such as generating carbon powder. Since the inner wall of the tower flange 31 is perpendicular to the horizontal ground, the carbon powder generated by the friction can fall naturally due to the influence of its own gravity, and will not accumulate, thereby avoiding poor braking effect caused by a reduction in the yaw friction coefficient due to the accumulation of carbon powder, thereby improving the effect and safety of yaw braking.

[0026] As a specific embodiment of the present invention, the driving member 221 can be a hydraulic station, and a pressure oil circuit 224 and an oil return circuit 225 capable of transporting the hydraulic oil back to the hydraulic station are arranged on the base 223. The hydraulic station is connected with one end of the pressure oil circuit 224 to supply oil to the inside of the pressure oil circuit 224. The telescopic member 222 is arranged in the pressure oil circuit 224. When the hydraulic station supplies oil to the pressure oil circuit 224, the telescopic member 222 is lifted up in the pressure oil circuit 224. The oil outlet of the pressure oil circuit 224 can be arranged to be opposite to the inner wall of the tower flange 31, so that the telescopic member 222 can move toward the tower flange 31 under the drive of the oil supply of the hydraulic station. The end of the telescopic member 222 away from the base 223 is connected to the brake assembly 21. Therefore, the telescopic member 222 moves toward the tower flange 31 under the drive of the oil supply of the hydraulic station, and can drive the brake assembly 21 to move toward the tower flange 31. The frame 1 moves in the same direction until it contacts the inner wall of the tower flange 31, thereby providing a friction force in the opposite direction of the yaw direction to the frame 1 to brake the frame 1. In this process, the frame 1 will be worn due to the friction of the brake assembly 21. Since the axis of the tower flange 31 is perpendicular to the ground, the carbon powder generated by the friction can fall naturally due to its own gravity and will not accumulate. This avoids the poor braking effect caused by the reduction of the yaw friction coefficient due to the accumulation of carbon powder, thereby improving the effect and safety of the yaw braking and extending the service life of the yaw braking device. One end of the return oil circuit 225 is connected to the pressure oil circuit 224, and the other end is connected to the hydraulic station. The hydraulic station forms a hydraulic oil circulation loop through the pressure oil circuit 224 and the return oil circuit 225. When the hydraulic station does not supply oil in the online pressure oil circuit 224, the telescopic member 22 retracts and transports the hydraulic oil back to the hydraulic station through the return oil circuit 225. Figure 1 As shown, when multiple braking devices 2 are arranged on the frame 1, the braking devices 2 are connected in sequence using a hydraulic circulation loop, so that the braking devices 2 can be started simultaneously, that is, when the pressures in each pressure oil circuit 224 are the same, the telescopic parts 222 in each pressure oil circuit 224 simultaneously push the brake assembly 21 to move toward the tower flange 31, so that the resistance applied to the frame 1 is consistent, thereby improving the braking effect.

[0027] As a specific implementation of the present invention, a sealing structure is provided between the telescopic member 222 and the base 223 .

[0028] It can be understood that a pressure oil circuit 224 is provided on the base 223, the telescopic member 222 is in the pressure oil circuit 224, and a sealing structure is provided between the pressure oil circuit 224 and the telescopic member 222, wherein the telescopic member 222 can be a piston, and the sealing structure can be a sealing ring, and the sealing ring can be a member made of rubber or the like, which has elasticity and can enable the piston to move in the pressure oil circuit. At the same time, it can prevent oil from leaking from the pressure oil circuit 224, maintain the pressure in the pressure oil circuit, so that the telescopic member 222 can be pushed out in the pressure oil circuit, and then the brake assembly 21 moves toward the direction of the tower flange 31 until it contacts the inner wall of the tower flange 31, thereby braking the frame 1 and improving the working stability of the braking device 2.

[0029] As a specific embodiment of the present invention, Fig. 9 As shown, the pressure oil circuit 224 includes a first pressure oil circuit 2241 and a second pressure oil circuit 2242, wherein one end of the first pressure oil circuit 2241 is connected to the hydraulic station, and the other end of the first pressure oil circuit 2241 is connected to the telescopic member 222, one end of the second pressure oil circuit 2242 is connected to the hydraulic station, and the other end of the second pressure oil circuit 2242 is connected to the telescopic member 222, one of the first pressure oil circuit 2241 and the second pressure oil circuit 2242 is used for normal use, and the other is used as a backup, when one of the pressure oil circuits is blocked, the hydraulic station is used to pressurize the other pressure oil circuit, forcing the telescopic member 222 to move toward the tower flange 31, and then the brake assembly 21 can be driven to move toward the tower flange 31 until it rests on the inner wall of the tower flange 31, providing a friction force opposite to the yaw direction to the frame 1 to brake the frame 1, and the pressure oil circuit 224 adopts one for use and one for backup, which improves the stability of the yaw brake device.

[0030] As a specific implementation of the present invention, at least six brake devices 2 are arranged on the frame 1, and the pressure oil circuit 224 and the return oil circuit 225 in each brake device 2 are respectively connected to the hydraulic station.

[0031] It is understandable that if Figure 4As shown, as a preferred embodiment of the present invention, there can be six brake devices 2, which are evenly arranged on the frame, so that the brake components 21 therein can apply abutting force to the tower flange 31 from six directions respectively, and the pressure oil circuit 224 of each brake device 2 is connected to the hydraulic station through the same oil circuit, and the return oil circuit 225 of each brake device 2 is connected to the hydraulic station through the same oil circuit. During braking, the hydraulic station supplies oil. When the oil circuit pressure connected to the hydraulic station and the pressure oil circuit 224 is consistent, the pressure oil circuit 224 of each brake device 2 is supplied with oil, and the telescopic parts 222 in each pressure oil circuit are pushed out at the same pressure, so that the brake components 21 connected to each telescopic part 222 move toward the inner ring of the tower flange 31 until they are against the inner ring of the tower flange 31 for braking. Multiple brake devices 2 brake the frame 1 at the same pressure at the same time, so that the inner ring of the tower flange 31 is evenly stressed, the friction between the brake components 21 and the inner ring of the tower flange 31 is increased, and the braking effect is improved.

[0032] As a specific embodiment of the present invention, Figure 5 and Figure 8 As shown, the brake assembly 21 includes a brake member 211 and a connecting member. The working surface of the brake member 211 facing the tower flange 31 can fit with the inner wall of the tower flange 31. The brake member 211 is connected to the telescopic member 222 through the connecting member. Preferably, the brake member 211 can be an arc-shaped brake member. The curvature of the arc-shaped brake member is the same as the curvature of the inner wall of the tower flange 31. When the telescopic member 222 is pushed out of the pressure oil circuit 224 and then pushes the arc-shaped brake member against the inner wall of the tower flange 31, the arc-shaped brake member and the tower flange 31 have a good fit, thereby improving the friction between the arc-shaped brake member and the tower flange 31, thereby improving the braking performance of the yaw brake device. A connecting member is also provided, such as Figure 6 As shown, the connecting member is disposed between the telescopic member 222 and the brake member 211 , and while serving as a connection, it can also fill the gap between the brake member 211 and the telescopic member 222 , thereby avoiding the formation of a cavity therebetween, which would affect the stability of the structure.

[0033] As a specific embodiment of the present invention, Fig. 9 As shown, an annular protrusion structure 4 is formed at one end of the base 223 facing the brake assembly 21, and the outer peripheral surface of the brake assembly 21 can contact the inner wall of the annular protrusion structure 4. The annular protrusion structure 4 can guide the telescopic member 222 and the brake assembly 21 connected to the telescopic member 222, thereby improving the stability of the yaw brake device.

[0034] It can be understood that the tower 3 is vertically arranged on the horizontal ground, therefore, the axis of the tower flange 31 is perpendicular to the horizontal ground, and the outlet of the annular protruding structure 4 on the base 223 is opposite to the inner wall of the tower flange 31, which guides the telescopic part 222 and the brake assembly 21 connected to the telescopic part 222, ensuring that the brake assembly 21 can be against the inner wall of the tower flange 31, thereby having a braking effect on the frame 1. At the same time, the carbon powder generated by the friction between the brake assembly 21 and the tower flange 31 will fall under the influence of gravity, which can avoid the poor braking effect caused by the reduction of the yaw friction coefficient due to the accumulation of carbon powder, thereby improving the effect and safety of the yaw brake and extending the service life of the yaw brake device.

[0035] A second aspect of the present invention provides a yaw system, which includes a yaw mechanism 5, a tower 3, a frame 1 and a yaw brake device according to any of the above technical solutions, the yaw mechanism 5 includes a yaw bearing inner ring 51 and a yaw bearing outer ring 52, the yaw bearing inner ring 51 is connected to the tower 3, the yaw bearing outer ring 52 is connected to the frame 1, the yaw brake device is installed on the frame 1, and a tower flange 31 is fixedly installed on the yaw bearing inner ring 51.

[0036] It can be understood that a yaw brake is provided on the frame 1, and the yaw brake is meshed with the yaw bearing inner ring 51 through gears. Starting the yaw brake drives the frame 1 to rotate on the yaw bearing inner ring 51 through the yaw bearing outer ring 52 to achieve normal yaw of the frame 1. When the frame 1 reaches the yaw angle, the rotation of the yaw brake is stopped. Since there is inertia at this time, the yaw brake device installed on the frame 1 starts to work, and the hydraulic station supplies oil to the pressure oil circuit 224. The telescopic member 222 is pushed out of the pressure oil circuit 224, and the oil outlet of the pressure oil circuit 224 is opposite to the inner wall of the tower flange 31. The telescopic member 222 moves toward the tower under the pressure of the hydraulic oil. The tower flange 31 moves in the direction of the tower flange 31, thereby driving the brake assembly 21 to move in the direction of the tower flange 31 until it contacts the inner wall of the tower flange 31, thereby providing a friction force in the opposite direction of the yaw direction to the frame 1 to brake the frame 1. In this process, the frame 1 will be worn due to the friction of the brake assembly 21. Since the inner wall of the tower flange 31 is perpendicular to the horizontal ground, the carbon powder generated by the friction can fall naturally due to the influence of gravity and will not accumulate, thereby avoiding poor braking effect caused by a decrease in the yaw friction coefficient due to the accumulation of carbon powder, thereby improving the effect and safety of the yaw brake and extending the service life of the yaw brake device.

[0037] As a specific embodiment of the present invention, Figure 7As shown, a yaw friction layer 32 is formed on the inner wall of the tower flange 31 to enhance the friction between the tower flange 31 and the brake component 211 and improve the yaw braking effect. Alternatively, the thickness of the tower flange 31 can be increased. For example, the thickness of the tower flange 31 can be increased by 30 mm to 40 mm, so that the tower flange 31 is not easily worn when it wears against the brake component 211, thereby extending the service life of the tower flange 31.

[0038] In order to facilitate a deeper understanding of the technical concept and advantages of the yaw brake device of the present invention, the following Figures 4 to 12 A relatively comprehensive yaw brake device is described with some relatively preferred features of the present invention.

[0039] Six sets of brake devices 2 are arranged on the frame 1, and the brake devices 2 include brake components 21 and drive components 22, wherein the brake components 21 include brake parts 211 and connecting parts, the brake parts 211 are arc-shaped brake parts, and the arc of the arc-shaped brake parts is the same as the inner ring arc of the tower flange 31, so that the brake parts 211 can fit with the inner ring of the tower flange 31, and friction materials are arranged on the outer surface of the arc-shaped brake parts, and the drive components 222 include drive parts 221, telescopic parts 222 and a base 223 installed on the frame 1, the drive parts 221 are hydraulic stations, the telescopic parts 222 are pistons, and the base 223 is provided with a pressure oil circuit 224 and a return oil circuit 225 capable of outputting hydraulic oil back to the hydraulic station One end of each pressure oil circuit 224 in the six groups of brake devices 2 is connected to the hydraulic station through the same oil circuit, a telescopic member 222 is arranged in the other end of the pressure oil circuit 224, a sealing ring is arranged between the telescopic member 222 and the pressure oil circuit 224, the telescopic member 222 is connected to the brake member 211 through a connecting member, one end of the return oil circuit 225 is connected to the hydraulic station, and the other end is connected to the pressure oil circuit, the hydraulic station forms a hydraulic oil circulation loop through the pressure oil circuit 224 and the return oil circuit 225, the pressure oil circuit 224 includes a first pressure oil circuit 2241 and a second pressure oil circuit 2242, one end of the first pressure oil circuit 2241 is connected to the hydraulic station, and the other end of the first pressure oil circuit 2241 is connected to the telescopic member 222 One end of the second pressure oil circuit 2242 is connected to the hydraulic station, and the other end of the second pressure oil circuit 2242 is connected to the telescopic member 222, one for use and one for reserve. An annular protrusion structure 4 is formed on the base 223 at one end facing the brake assembly 21. The outer peripheral surface of the brake assembly 21 can contact the inner wall of the annular protrusion structure 4, which plays a guiding role for the brake assembly 21. The hydraulic station supplies oil. When the oil circuit pressure connected to the hydraulic station and the pressure oil circuit 224 is consistent, the pressure oil circuit 224 of each brake device 2 enters oil, and the telescopic members 222 in each pressure oil circuit are pushed out at the same time with the same pressure, so that the brake assembly 21 connected to each telescopic member 222 moves toward the inner ring of the tower flange 31 until the top The inner ring of the tower flange 31 is braked, and multiple brake devices 2 brake the frame 1 at the same pressure at the same time, so that the inner ring of the tower flange 31 is evenly stressed, the friction between the brake assembly 21 and the inner ring of the tower flange 31 is increased, and the braking effect is improved. In this process, the frame 1 will be worn due to the friction of the brake assembly 21, such as carbon powder. Since the axis of the tower flange 31 is perpendicular to the horizontal ground, the carbon powder generated by the friction can fall naturally due to the influence of gravity and will not accumulate, thereby avoiding poor braking effect due to a decrease in the yaw friction coefficient caused by the accumulation of carbon powder, improving the effect and safety of the yaw brake, and extending the service life of the yaw brake device.

[0040] It can be seen from the above description that, first, the present invention arranges the braking device 2 so that the brake assembly 21 abuts against the tower flange 31, thereby avoiding poor braking effect caused by a decrease in the yaw friction coefficient due to carbon powder accumulation, thereby improving the effect and safety of yaw braking.

[0041] Second, hydraulic drive is used to make multiple brake devices 2 abut against the inner circle of the tower flange 31 under the same pressure to brake the frame 1, so that the inner circle of the tower flange 31 is evenly stressed, thereby increasing the friction between the brake assembly 21 and the inner circle of the tower flange 31 and improving the braking effect.

[0042] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited thereto. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications, including the combination of various specific technical features in any suitable manner. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations. However, these simple modifications and combinations should also be regarded as the contents disclosed by the present invention and belong to the protection scope of the present invention.

Claims

1. A yaw brake device, characterized in that: The invention comprises a braking device (2) arranged on a frame (1), wherein the braking device (2) comprises a braking assembly (21) and a driving assembly (22), wherein the driving assembly (22) can drive the braking assembly (21) to approach a tower flange (31) so as to abut against an inner wall of the tower flange (31).

2. The yaw brake device according to claim 1, characterized in that: The driving assembly (22) comprises a driving member (221), a telescopic member (222), and a base (223) mounted on the frame (1); the telescopic member (222) is telescopically connected to the base (223) via the driving member (221); an end of the telescopic member (222) away from the base (223) is connected to the brake assembly (21); and the driving member (221) pushes the brake assembly (21) to move toward the tower flange (31) via the telescopic member (222).

3. The yaw brake device according to claim 2, characterized in that: The driving member (221) is a hydraulic station. The base (223) is provided with a pressure oil circuit (224) and an oil return circuit (225) capable of conveying hydraulic oil back to the hydraulic station. The hydraulic station is connected to one end of the pressure oil circuit (224) so ​​as to supply oil to the inside of the pressure oil circuit (224) to push the telescopic member (222) to move in the direction of the tower flange (31). The hydraulic station forms a hydraulic oil circulation loop through the pressure oil circuit (224) and the oil return circuit (225).

4. The yaw brake device according to claim 2, characterized in that: A sealing structure is provided between the telescopic member (222) and the base (223), and the sealing structure is a sealing ring.

5. The yaw brake device according to claim 3, characterized in that: The pressure oil circuit (224) comprises a first pressure oil circuit (2241) and a second pressure oil circuit (2242); one end of the first pressure oil circuit (2241) is connected to the hydraulic station, and the other end of the first pressure oil circuit (2241) is connected to the telescopic member (222); one end of the second pressure oil circuit (2242) is connected to the hydraulic station, and the other end of the second pressure oil circuit (2242) is connected to the telescopic member (222).

6. The yaw brake device according to claim 3, characterized in that: It comprises at least six brake devices (2), and the pressure oil circuit (224) and the return oil circuit (225) of each brake device (2) are in communication with the hydraulic station.

7. The yaw brake device according to claim 2, characterized in that: The brake assembly (21) comprises a brake component (211) and a connecting component, wherein a working surface of the brake component (211) facing the tower flange (31) can be in contact with an inner wall of the tower flange (31), and the brake component (211) is connected to the telescopic component (222) via the connecting component.

8. The yaw brake device according to claim 7, characterized in that: An annular protruding structure (4) is formed at one end of the base (223) facing the brake assembly (21), and the outer peripheral surface of the brake assembly (21) can contact the inner wall of the annular protruding structure (4).

9. A yaw system, characterized in that: The invention comprises a yaw mechanism (5), a tower (3), a frame (1), and a yaw brake device according to any one of claims 1 to 8, wherein the yaw mechanism (5) comprises a yaw bearing inner ring (51) and a yaw bearing outer ring (52), the yaw bearing inner ring (51) is connected to the tower (3), the yaw bearing outer ring (52) is connected to the frame (1), the yaw brake device is mounted on the frame (1), and the tower flange (31) is fixedly mounted on the yaw bearing inner ring (51).

10. The yaw system according to claim 9, characterized in that: A yaw friction layer (32) is formed on the inner wall of the tower flange (31).

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