Brake device and brake method for wind turbine generator

Abstract

The invention provides a brake device and method for a wind turbine generator. The brake device comprises a brake disc connected to the lower portion of a yaw gear and a brake assembly connected to a bottom plate. The brake assembly comprises a body, a first electromagnetic assembly and a second electromagnetic assembly, the first electromagnetic assembly and the second electromagnetic assembly are vertically arranged on the body in a spaced mode, the first electromagnetic assembly comprises a driving assembly, an execution assembly and a first suction assembly, the driving assembly drives the execution assembly to rotate, and the rotation direction of the execution assembly is opposite to the rotation direction of the brake disc. The brake disc is arranged between the first suction assembly and the second electromagnetic assembly. The second electromagnetic assembly comprises a second attraction assembly, a second elastic piece arranged above the second attraction assembly and a second armature arranged above the second elastic piece. The first suction assembly and the second suction assembly are both electrically connected with an external power source, and a first elastic piece is arranged below the first suction assembly. Braking is carried out in an electric control mode, and the problems of braking delay and braking failure are avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power generation, and in particular to a wind turbine brake device. The present invention also relates to a braking method using the wind turbine brake device for braking. Background Art

[0002] The braking device of the wind turbine mainly includes the main shaft brake device and the yaw brake device. The yaw system realizes yaw to the wind, and after the wind is facing the wind, the nacelle of the wind turbine needs to maintain a stable position, which requires a set of braking devices. The existing yaw brake uses a hydraulic system brake, which is mainly composed of a yaw brake disc and a yaw brake caliper. The yaw brake disc and the outer ring of the yaw bearing are fixed on the tower together, and the yaw brake caliper is installed on the nacelle chassis. A piston cylinder is set in the brake caliper. The push of the piston in the piston cylinder is controlled by high-pressure oil to drive the brake caliper to clamp or loosen the brake disc to achieve yaw braking.

[0003] Damage to the yaw brake pump or control valve will directly affect the pressure relief speed, and blockage of the hydraulic line will also limit the pressure relief flow, resulting in a prolonged pressure relief process. Delayed yaw brake pressure relief will cause the wind turbine to fail to stop running in time, increasing the risk of equipment damage. In the case of excessive wind speed or extreme weather conditions, it may cause damage to the generator and the surrounding environment, and even cause safety accidents.

[0004] In addition, the delay in yaw brake pressure release will cause excessive pressure on components in the yaw drive system (such as the yaw gear and drive gear), which may cause these components to break or wear, thereby affecting the overall wind power generation efficiency. The inability to adjust the direction of the nacelle to align with the wind direction in time will reduce the effective use of wind energy and thus affect the power generation. Summary of the invention

[0005] In view of this, the present invention aims to provide a wind turbine brake device to avoid the defect of prolonged pressure relief process caused by the hydraulic yaw brake system, reduce the braking reaction time of the yaw system, and improve the safety of the wind turbine.

[0006] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0007] A wind turbine brake device comprises a brake disc connected below a yaw gear and a brake assembly connected to a bottom plate;

[0008] The brake assembly includes a body, and a first electromagnetic assembly and a second electromagnetic assembly spaced apart from each other on the body, the first electromagnetic assembly includes a driving assembly and an actuator assembly, and a first suction assembly, the driving assembly drives the actuator assembly to rotate, and the rotation direction of the actuator assembly is opposite to the rotation direction of the brake disc;

[0009] The brake disc is disposed between the first attracting assembly and the second electromagnetic assembly;

[0010] The second electromagnetic assembly includes a second attracting assembly, a second elastic member disposed above the second attracting assembly, and a second armature disposed above the second elastic member; both the first attracting assembly and the second attracting assembly are electrically connected to an external power source, and a first elastic member is disposed below the first attracting assembly;

[0011] When the first attracting assembly is energized, the actuating assembly is driven to move upward away from the brake disc, and the first elastic member is compressed to store energy. When the first attracting assembly is de-energized, the first elastic member releases energy to drive the actuating assembly to return to its position, and the actuating assembly abuts above the brake disc;

[0012] When the second attracting assembly is energized, the second armature is attracted and abuts below the brake disc, and the second elastic member is compressed to store energy. When the second attracting assembly is de-energized, the second elastic member releases energy to drive the second armature away from the brake disc.

[0013] Further, the first attracting assembly includes a first connecting seat, a first coil and a first friction member disposed within the first connecting seat;

[0014] The first coil is disposed above the first friction member, the first elastic member is correspondingly disposed below the first friction member, and a first armature is disposed below the first elastic member. The first armature is disposed on the actuating assembly.

[0015] Further, the driving assembly includes a driving gear and a plurality of driven gears meshing and transmitting within the internal gear ring of the driving gear;

[0016] The actuating assembly is connected to the driven gear, and a first driving portion for driving the driving gear to rotate is further disposed on the bottom plate;

[0017] The rotation direction of the driving gear is opposite to that of the yaw gear.

[0018] Further, the actuating assembly includes a connecting shaft connected to the axis of the driven gear and a friction disc disposed below the connecting shaft;

[0019] The connecting shaft penetrates through the body and the first attracting assembly and extends towards the brake disc. A circular hole for accommodating the friction disc is provided on the first armature, and the friction disc is flush with the bottom surface of the first armature.

[0020] Further, the brake caliper has an annular rotating body structure, and an annular opening groove is further provided on the brake caliper;

[0021] The first suction assembly and the second suction assembly are respectively arranged up and down in the opening groove. A connecting bracket is provided on the upper part of the brake caliper, and the connecting bracket is connected to the bottom plate.

[0022] Furthermore, a plurality of support columns arranged radially along the brake caliper are provided on the connecting bracket, and the plurality of support columns are connected to the yaw bearing;

[0023] The support columns are arranged between two adjacent driven gears.

[0024] Furthermore, the second suction assembly includes a second connecting seat, a second coil and a second friction member arranged in the second connecting seat;

[0025] The two second coils are arranged at intervals in the radial direction of the second connecting seat, and the second friction member is arranged corresponding to the second coil;

[0026] The second elastic member is correspondingly arranged above the second coil.

[0027] Furthermore, an external gear ring is provided outside the driving gear, and a driving gear is provided at the power output end of the first driving part, and the driving gear is meshed and driven with the external gear ring.

[0028] Furthermore, both the first elastic member and the second elastic member are in an annular structure;

[0029] The longitudinal section of the first elastic member, and / or, the second elastic member is in a shape similar to the Chinese character "ji".

[0030] Compared with the prior art, the present invention has the following advantages:

[0031] For the wind turbine brake device of the present invention, by arranging the first suction assembly and the second suction assembly above and below the brake disc, braking is carried out in an electric control manner, avoiding the delay caused by using a hydraulic oil pump for braking in the prior art and the problem of brake failure caused by oil leakage, thereby ensuring the use safety of the wind turbine and avoiding equipment damage. And, by driving the execution assembly to rotate reversely on the brake disc through the driving assembly, the rotation resistance of the brake disc is increased, and the braking time of the yaw system is further shortened.

[0032] Another object of the present invention is to propose a wind turbine braking method. This braking method uses the above-mentioned wind turbine brake device to brake the yaw system. This braking method includes the following steps:

[0033] First, when the wind turbine is running normally, the brake device does not act, the yaw bearing rotates along the yaw gear to adjust the direction of the wind wheel, the first suction assembly is electrified, and the second suction assembly is de-energized;

[0034] Secondly, when the braking device needs to perform a braking operation and the required braking force is small, the first suction assembly is powered off, the first armature abuts above the brake disc, the second suction assembly is powered on, the second armature abuts below the brake disc, and the drive assembly does not start;

[0035] When the required braking force is large, the drive assembly drives the execution assembly to rotate in a direction opposite to the brake disc;

[0036] Finally, when the rotational speed of the wind turbine generator set is zero, the braking process ends.

[0037] In the braking method of the wind turbine generator set of the present invention, by using the above-mentioned wind turbine brake device to brake the yaw system, it is possible to select the alternative or combined use of the first suction assembly, the second suction assembly, and the execution assembly according to factors such as meteorological conditions, unit capabilities, and wind farm ranges, so as to adapt to the braking torque required in different environments, avoid damage to the wind turbine generator set equipment caused by excessive impact force, and thus ensure the correct position of the wind wheel in the shutdown state and improve the overall service life of the machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments and descriptions thereof of the present invention are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0039] Figure 1 is a first perspective three-dimensional schematic diagram of the wind turbine generator set braking device, bottom plate, yaw motor, yaw gear, and yaw bearing connection according to Embodiment 1 of the present invention;

[0040] Figure 2 is a second perspective three-dimensional schematic diagram of the wind turbine generator set braking device, bottom plate, yaw motor, yaw gear, and yaw bearing connection according to Embodiment 1 of the present invention;

[0041] Figure 3 is a top view schematic diagram of the wind turbine generator set braking device, bottom plate, yaw motor, yaw gear, and yaw bearing connection according to Embodiment 1 of the present invention;

[0042] Figure 4 is Figure 3 a cross-sectional schematic diagram at A-A in

[0043] Figure 5 is a first perspective three-dimensional schematic diagram of the wind turbine generator set braking device, yaw motor, yaw gear, and yaw bearing connection according to Embodiment 1 of the present invention;

[0044] Figure 6 is a second perspective three-dimensional schematic diagram of the wind turbine generator set braking device, yaw motor, yaw gear, and yaw bearing connection according to Embodiment 1 of the present invention;

[0045] Figure 7 Top view schematic diagram of the connection of the braking device, yaw motor, yaw gear, and yaw bearing according to the first embodiment of the present invention;

[0046] Figure 8 is Figure 7 Cross-sectional schematic diagram at B-B in

[0047] Figure 9 is Figure 8 Partial enlarged view at I in

[0048] Explanation of reference numerals:

[0049] 1. Yaw gear; 2. Brake disc; 3. Braking component; 4. Base plate; 5. First driving part; 6. Connection bracket; 7. Support column; 8. Driving gear; 9. Yaw motor; 10. Yaw bearing;

[0050] 301. Body; 302. Driving component; 303. Execution component; 304. First suction component; 305. Second suction component; 307. Second armature; 308. First elastic member;

[0051] 3021. Driving gear; 3022. Driven gear;

[0052] 3031. Connecting shaft; 3032. Friction disc;

[0053] 3041. First connection seat; 3042. First coil; 3043. First friction member;

[0054] 3051. Second connection seat; 3052. Second friction member; 3053. Second coil; 3054. Second elastic member;

[0055] 3011. Open slot;

[0056] 30211. Outer gear ring; 30212. Inner gear ring. Detailed implementation manners

[0057] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0058] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "back", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0059] In addition, in the description of the present invention, unless otherwise clearly defined, the terms "installation", "connection", "connection", "connector" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in combination with specific situations.

[0060] The present invention will be described in detail below with reference to the drawings and in combination with embodiments.

[0061] Embodiment 1

[0062] This embodiment relates to a braking device for a wind turbine. Generally, as Figures 1 to 4 shown, the braking device for the wind turbine includes a brake disc 2 connected below the yaw gear 1 and a braking assembly 3 connected to the bottom plate 4. The braking assembly 3 includes a body 301, and a first electromagnetic assembly and a second electromagnetic assembly that are arranged at intervals up and down on the body 301. The first electromagnetic assembly includes a driving assembly 302, an executing assembly 303, and a first attracting assembly 304. The driving assembly 302 drives the executing assembly 303 to rotate, and the rotation direction of the executing assembly 303 is opposite to the rotation direction of the brake disc 2.

[0063] Among them, the brake disc 2 is arranged between the first attracting assembly 304 and the second electromagnetic assembly. The second electromagnetic assembly includes a second attracting assembly 305, a second elastic member 3054 arranged above the second attracting assembly 305, and a second armature 307 arranged above the second elastic member 3054; both the first attracting assembly 304 and the second attracting assembly 305 are electrically connected to an external power supply, and a first elastic member 308 is arranged below the first attracting assembly 304.

[0064] Secondly, when the first attracting component 304 is powered on, the actuating component 303 is driven to move upward away from the brake disc 2, and the first elastic member 308 is compressed to store energy. When the first attracting component 304 is powered off, the first elastic member 308 releases energy to drive the actuating component 303 to return to its position, and the actuating component 303 abuts above the brake disc 2. When the second attracting component 305 is powered on, the second armature 307 is attracted and abuts below the brake disc 2, and the second elastic member 3054 is compressed to store energy. When the second attracting component 305 is powered off, the second elastic member 3054 releases energy to drive the second armature 307 away from the brake disc 2.

[0065] In the braking device of the wind turbine generator set of this embodiment, by arranging the first attracting component 304 and the second attracting component 305 above and below the brake disc 2, braking is performed in an electrically controlled manner, avoiding the delay caused by using a hydraulic oil pump for braking in the prior art and the problem of brake failure caused by oil leakage, thereby ensuring the use safety of the wind turbine generator set and avoiding equipment damage. Moreover, by driving the actuating component 303 to rotate reversely on the brake disc 2 through the driving component 302, the rotational resistance of the brake disc 2 is increased, and the braking time of the yaw system is further shortened.

[0066] Based on the above overall introduction, an exemplary structure of the braking device of the wind turbine generator set of this embodiment is as Figures 1 to 4 shown. The driving component 302 is arranged above the yaw gear 1. The upper end of the bottom plate 4 is connected to the nacelle, and the lower end is connected to the yaw bearing 10.

[0067] As a preferred embodiment, as Figure 4 and Figure 9 shown, the first attracting component 304 includes a first connecting seat 3041, a first coil 3042 and a first friction member 3043 arranged in the first connecting seat 3041. The first coil 3042 is arranged above the first friction member 3043. The first elastic member 308 is correspondingly arranged below the first friction member 3043. A first armature is arranged below the first elastic member 308, and the first armature is arranged on the actuating component 303.

[0068] The first connecting seat 3041 is made of a steel member. An annular ring groove for accommodating the first coil 3042 is formed in the first connecting seat 3041. For better effect, two annular ring grooves are arranged at intervals inside and outside in this embodiment for placing two first coils 3042, improving the adsorption force on the first armature and ensuring the operation reliability.

[0069] In addition, the first friction plate is an annular plate. When the first elastic member 308 presses against the first friction plate, it is used to reduce the wear on the first connecting seat 3041. The first friction plate in this embodiment and the following second friction plate are made of semi-metal or powder metallurgy materials. The first elastic member 308 and the second elastic member 3054 are spring plates made of spring steel.

[0070] Further, as Figures 5 to 8 shown, the driving assembly 302 includes a driving gear 3021, and a plurality of driven gears 3022 meshing and transmitting within the internal gear ring 30212 of the driving gear 3021. The actuating assembly 303 is connected to the driven gear 3022, and a first driving portion 5 for driving the driving gear 3021 to rotate is further provided on the bottom plate 4. The rotation direction of the driving gear 3021 is opposite to that of the yaw gear 1. The driving gear 3021 has an internal gear ring 30212, and a plurality of driven gears 3022 are arranged above the brake caliper.

[0071] Preferably, still as Figures 1 to 4 shown, the first driving portion 5 of this embodiment adopts a servo motor. Two first driving portions 5 are fixedly connected to the bottom plate 4, and the yaw motor 9 meshing outside the yaw gear 1 is also fixed on the bottom plate 4. The yaw motor 9 and the servo motor are arranged staggeredly. The yaw bearing 10 is driven by the yaw motor 9 to rotate relative to the yaw gear 1. A flat thrust bearing is provided between the yaw gear 1 and the driving gear 3021, which can preferably bear the axial force generated by the pressing of the actuating assembly 303 against the brake disc 2 and ensure the stability of the driving assembly 302.

[0072] As Figures 5 to 8 shown, an external gear ring 30211 is provided outside the driving gear 3021, and a driving gear 8 is provided at the power output end of the first driving portion 5. The driving gear 8 is in meshing transmission with the external gear ring 30211. The first driving portion 5 drives the driven gear 3022 to rotate, thereby driving the actuating assembly 303 to rotate, and the rotation direction of the actuating assembly 303 is opposite to that of the brake disc 2.

[0073] As a preferred embodiment, as Figures 5 to 8 shown, the actuating assembly 303 includes a connecting shaft 3031 connected to the axis of the driven gear 3022, and a friction disc 3032 provided below the connecting shaft 3031. The connecting shaft 3031 penetrates through the main body 301 and the first attracting assembly 304 and extends towards the brake disc 2. A round hole for accommodating the friction disc 3032 is provided on the first armature, and the friction disc 3032 is flush with the bottom surface of the first armature.

[0074] In addition, as Figures 2 to 6As shown in the figure, the brake caliper has an annular rotating body structure, and an annular opening groove 3011 is also provided on the brake caliper. The first suction assembly 304 and the second suction assembly 305 are respectively arranged up and down in the opening groove 3011. A connecting bracket 6 is provided on the upper part of the brake caliper, and the connecting bracket 6 is connected to the bottom plate 4. The opening groove 3011 is a U-shaped groove formed on the side circumference of the brake caliper, and the open end faces the outside of the brake caliper. In this embodiment, the brake caliper is set for full-circle braking, and during the braking process, resistance is evenly applied to the brake disc 2, improving the smoothness during braking. Compared with the prior art where local braking is used and it is easy to cause jitter or deviation, it effectively avoids the unstable operation of the nacelle caused by yaw braking.

[0075] And, as Figures 4 to 8 shown, the actuating assembly 303 and the driven gear 3022 of this embodiment are also partially arranged along the axial direction of the brake caliper, so as to further improve the effect of stable braking in the case of large required braking resistance, and increase the positioning accuracy of the yaw system, achieving a quick and accurate stop of the nacelle and increasing power generation.

[0076] Specifically, as shown in the figure, a plurality of support columns 7 arranged along the radial direction of the brake caliper are provided on the connecting bracket 6, and the plurality of support columns 7 are connected to the yaw bearing 10. The support columns 7 are arranged between two adjacent driven gears 3022. By providing the support columns 7, the yaw bearing 10 is fixedly connected to the bottom plate 4, and since both the yaw bearing 10 and the brake caliper are fixed to the bottom plate 4 through the connecting bracket 6, the stability of the relative position between the two is improved, avoiding the position adjustment process between the brake caliper and the brake disc 2 during installation, and improving the installation convenience.

[0077] As Figure 9 shown, the second suction assembly 305 includes a second connecting seat 3051, a second coil 3053 and a second friction member 3052 arranged in the second connecting seat 3051. The two second coils 3053 are arranged at intervals along the radial direction of the second connecting seat 3051, the second friction member 3052 is arranged corresponding to the second coil 3053, and the second elastic member 3054 is arranged corresponding to the upper part of the second coil 3053.

[0078] Furthermore, both the first elastic member 308 and the second elastic member 3054 are in an annular structure. By setting the first elastic member 308 and the second elastic member 3054 as annular, the overall structural strength of the first elastic member 308 and the second elastic member 3054 is increased, the resilience of the first elastic member 308 and the second elastic member 3054 is increased, avoiding the lag of brake cancellation and increasing energy consumption.

[0079] In addition, as Figure 9As shown, the longitudinal cross-section of the first elastic member 308 and the second elastic member 3054 is in a shape similar to the Chinese character "ji". Of course, the first elastic member 308 or the second elastic member 3054 can also be set to a structure such as an M shape, etc., to increase the compression space of the first elastic member 308 and the second elastic member 3054 and improve the elastic performance.

[0080] Embodiment 2

[0081] This embodiment relates to a braking method for a wind turbine. This braking method for a wind turbine uses the wind turbine braking device described in Embodiment 1 to brake the yaw system. This braking method includes the following steps:

[0082] First, when the wind turbine is operating normally, the braking device does not act, the yaw bearing 10 rotates along the yaw gear 1 to adjust the direction of the wind wheel, the first suction assembly 304 is energized, and the second suction assembly 305 is de-energized;

[0083] Secondly, when the braking device needs to perform a braking operation, the first suction assembly 304 is de-energized, the first armature abuts above the brake disc 2, the second suction assembly 305 is de-energized, and only the first armature acts above the brake disc 2 for braking, and the drive assembly 302 does not start;

[0084] Finally, when the rotational speed of the wind turbine is zero, the braking process ends.

[0085] The braking method of this embodiment is applicable to the situation where the meteorological conditions are good and the wind resistance is small.

[0086] Embodiment 3

[0087] This embodiment relates to a braking method for a wind turbine. This braking method for a wind turbine uses the wind turbine braking device described in Embodiment 1 to brake the yaw system. This braking method includes the following steps:

[0088] First, when the wind turbine is operating normally, the braking device does not act, the yaw bearing 10 rotates along the yaw gear 1 to adjust the direction of the wind wheel, the first suction assembly 304 is energized, and the second suction assembly 305 is de-energized;

[0089] Secondly, when the braking device needs to perform a braking operation, the first suction assembly 304 is de-energized, the first armature abuts above the brake disc 2, the second suction assembly 305 is de-energized, the second suction assembly 305 is energized, and the second armature 307 abuts below the brake disc 2. At this time, the first armature and the second armature 307 act together above the brake disc 2 for braking, and the drive assembly 302 does not start;

[0090] Finally, when the rotational speed of the wind turbine is zero, the braking process ends.

[0091] The braking method of this embodiment is applicable to the situation where the meteorological conditions are poor and the wind resistance is large.

[0092] Embodiment 4

[0093] This embodiment relates to a braking method for a wind turbine unit. The braking method for the wind turbine unit uses the wind turbine unit braking device described in Embodiment 1 to brake the yaw system. The braking method includes the following steps:

[0094] First, when the wind turbine unit is operating normally, the braking device does not act, the yaw bearing 10 rotates along the yaw gear 1 to adjust the direction of the wind wheel, the first suction assembly 304 is energized, and the second suction assembly 305 is de-energized;

[0095] Second, when the braking device needs to perform a braking operation, the first suction assembly 304 is de-energized, the first armature abuts above the brake disc 2, the second suction assembly 305 is de-energized, the second suction assembly 305 is energized, and the second armature 307 abuts below the brake disc 2. At this time, the first armature and the second armature 307 jointly act above the brake disc 2 for braking, and the driving assembly 302 drives the executing assembly 303 to rotate in the direction opposite to the brake disc 2;

[0096] Finally, the rotational speed of the wind turbine unit is zero, and the braking process ends.

[0097] The braking method of this embodiment is applicable to situations with severe weather conditions and large wind resistance.

[0098] The braking method for the wind turbine unit in this embodiment can, by using the above-mentioned wind turbine braking device to brake the yaw system, select to use the first suction assembly 304, the second suction assembly 305, and the executing assembly 303 alternately or in combination step by step according to factors such as meteorological conditions, unit capabilities, and wind farm ranges, so as to adapt to the braking torque required in different environments, avoid damage to the wind turbine unit equipment caused by excessive impact force, and thus ensure the correct position of the wind wheel in the shutdown state and improve the overall service life of the machine.

[0099] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A wind turbine brake device, characterized in that: It comprises a brake disc (2) connected to the bottom of a yaw gear (1), and a brake assembly (3) connected to a bottom plate (4); The brake assembly (3) comprises a body (301), and a first electromagnetic assembly and a second electromagnetic assembly which are arranged on the body (301) at intervals from top to bottom, the first electromagnetic assembly comprising a driving assembly (302) and an actuator assembly (303), and a first suction assembly (304), the driving assembly (302) drives the actuator assembly (303) to rotate, and the rotation direction of the actuator assembly (303) is opposite to the rotation direction of the brake disc (2); The brake disc (2) is arranged between the first suction component (304) and the second electromagnetic component; The second electromagnetic component comprises a second suction component (305), a second elastic member (3054) arranged above the second suction component (305), and a second armature (307) arranged above the second elastic member (3054); the first suction component (304) and the second suction component (305) are both electrically connected to an external power supply, and a first elastic member (308) is arranged below the first suction component (304); When the first suction component (304) is powered on, the actuator component (303) is driven to move upward and away from the brake disc (2), and the first elastic member (308) is compressed to store energy; when the first suction component (304) is powered off, the first elastic member (308) releases energy to drive the actuator component (303) back to its original position, and the actuator component (303) abuts against the top of the brake disc (2); When the second suction component (305) is powered on, the second armature (307) is attracted and abuts against the bottom of the brake disc (2), and the second elastic member (3054) is compressed to store energy; when the second suction component (305) is powered off, the second elastic member (3054) releases energy to drive the second armature (307) to detach from the brake disc (2).

2. The wind turbine brake device according to claim 1, characterized in that: The first suction component (304) comprises a first connection seat (3041), a first coil (3042) and a first friction member (3043) arranged in the first connection seat (3041); The first coil (3042) is arranged on the upper part of the first friction member (3043), the first elastic member (308) is correspondingly arranged below the first friction member (3043), a first armature is arranged below the first elastic member (308), and the first armature is arranged on the actuator (303).

3. The wind turbine brake device according to claim 2, characterized in that: The driving assembly (302) comprises a driving gear (3021), and a plurality of driven gears (3022) meshing with an inner gear ring (30212) of the driving gear (3021); The execution component (303) is connected to the driven gear (3022), and a first driving part (5) for driving the driving gear (3021) to rotate is further provided on the bottom plate (4); The rotation direction of the driving gear (3021) is opposite to that of the yaw gear (1).

4. The wind turbine braking device according to claim 3, characterized in that: The execution component (303) includes a connecting shaft (3031) connected to the axis of the driven gear (3022), and a friction disc (3032) arranged below the connecting shaft (3031); The connecting shaft (3031) penetrates through the body (301) and the first attracting component (304) and extends towards the brake disc (2). A round hole for accommodating the friction disc (3032) is provided on the first armature, and the friction disc (3032) is flush with the bottom surface of the first armature.

5. The wind turbine braking device according to claim 4, characterized in that: The body (301) has an annular rotating body structure, and an annular opening groove (3011) is further provided on the body (301); The first attracting component (304) and the second attracting component (305) are respectively arranged above and below in the opening groove (3011). A connecting bracket (6) is provided on the upper part of the body (301), and the connecting bracket (6) is connected to the bottom plate (4).

6. The wind turbine braking device according to claim 5, characterized in that: A plurality of support columns (7) arranged radially along the body (301) are provided on the connecting bracket (6), and the plurality of support columns (7) are connected to the yaw bearing (10); The support column (7) is arranged between two adjacent driven gears (3022).

7. The wind turbine braking device according to claim 6, characterized in that: The second attracting component (305) includes a second connecting seat (3051), a second coil (3053) and a second friction member (3052) arranged in the second connecting seat (3051); The two second coils (3053) are arranged at intervals along the radial direction of the second connecting seat (3051), and the second friction member (3052) is arranged corresponding to the second coil (3053); The second elastic member (3054) is arranged corresponding to the upper part of the second coil (3053).

8. The wind turbine braking device according to claim 3, characterized in that: An external gear ring (30211) is provided outside the driving gear (3021), a driving gear (8) is provided at the power output end of the first driving part (5), and the driving gear (8) is in meshing transmission with the external gear ring (30211).

9. The wind turbine braking device according to claim 1, characterized in that: Both the first elastic member (308) and the second elastic member (3054) have an annular structure; The longitudinal section of the first elastic member (308) and / or the second elastic member (3054) is in a shape similar to the Chinese character "ji".

10. A wind turbine braking method, characterized in that: The wind turbine brake device according to claim 3 is used to brake the yaw system, and the braking method comprises the following steps: First, when the wind turbine generator set operates normally, the brake device does not operate, the yaw bearing (10) rotates along the yaw gear (1) to adjust the direction of the wind wheel, the first suction component (304) is powered on, and the second suction component (305) is powered off; Secondly, when the brake device needs to perform a braking operation and the required braking force is small, the first suction component (304) is powered off, the first armature abuts against the top of the brake disc (2), the second suction component (305) is powered on, the second armature (307) abuts against the bottom of the brake disc (2), and the driving component (302) is not started; When the required braking force is large, the driving component (302) drives the actuator component (303) to rotate in the opposite direction to the brake disc (2); Finally, the wind turbine speed is zero and the braking process is completed.

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