A yaw locking device for a wind turbine

Abstract

This invention discloses a yaw locking device for a wind turbine, relating to the technical field of wind turbine equipment. It includes: a tower with a rotating nacelle on it, and a rotating wind vane on the nacelle, the axes of which are parallel; a determining mechanism including a first conductive contact rod representing the wind vane direction and a second conductive contact rod representing the nacelle direction, with a rotating determining wheel between them, having a conductive area on the wheel; when the wind direction aligns with the nacelle's orientation, the two contact rods are electrically connected through the conductive area of ​​the wheel; a gear mechanism with its input end meshing with a tower gear ring and its output end meshing with the determining wheel; and a locking mechanism including an electromagnet module and a locking block of a magnetic locking unit. The electromagnet module is fixed inside the nacelle, and the top of the tower has a mounting groove corresponding to the locking block, with a guide slot below it. The two contact rods are electrically connected in series in the electromagnet module's energized circuit. Its structure is simple, enabling precise alignment and automatic stable locking, with high reliability.

Description

Technical Field

[0001] This invention relates to the field of wind turbine equipment technology, and in particular to a yaw locking device for a wind turbine. Background Technology

[0002] Wind turbines are clean energy power generation devices that convert wind energy into electrical energy. In a wind turbine generator set, the yaw system drives the nacelle to rotate, ensuring the rotor always faces the wind direction, thereby maximizing wind energy capture. Once the nacelle is aligned with the wind, a yaw locking device is usually required to lock it in place, preventing unnecessary nacelle swaying due to frequent changes in wind direction and avoiding additional loads on the yaw drive mechanism and tower.

[0003] Existing yaw locking devices are mainly divided into passive friction locking and active hydraulic / electric pin locking. Passive friction locking relies on hydraulic pressure or springs to provide continuous friction, which can lead to wear of the friction plates over long-term operation and poses a risk of leakage. Active pin locking typically requires the control system to determine the direction of the wind vane signal and actively drive the pin to move. It has a complex structure, relies on sensors and complex control logic, is costly, and may fail if the electrical or control system malfunctions. Summary of the Invention

[0004] The purpose of this invention is to provide a yaw locking device for wind turbines to solve the problems existing in the prior art. It has a simple structure, can achieve precise alignment and automatic stable locking of the wind turbine nacelle, and has high reliability.

[0005] To achieve the above objectives, the present invention provides the following solution: This invention provides a yaw locking device for a wind turbine, comprising: a tower on which a nacelle is mounted, rotating about a first vertical axis; a wind vane rotating about a second vertical axis is mounted on the nacelle; the first vertical axis is parallel to the second vertical axis; a determining mechanism, including a first conductive contact rod for indicating the direction of the wind vane and a second conductive contact rod for indicating the direction of the nacelle; a determining wheel is provided between the first and second conductive contact rods, the determining wheel being rotatably disposed within the nacelle about the second vertical axis; the determining wheel is provided with a wheel conductive area, and when the direction of the wind vane is consistent with the orientation of the nacelle, the rod heads of the first and second conductive contact rods are electrically connected through the wheel conductive area; and a gear mechanism disposed on the tower. Inside the cabin, the tower is equipped with a gear ring, the input end of the gear mechanism meshes with the gear ring, and the output end of the gear mechanism meshes with the judgment wheel; the locking mechanism includes at least one magnetic locking unit, the magnetic locking unit includes an electromagnet module and a locking block; the electromagnet module is fixed inside the cabin; the top of the tower is provided with multiple mounting grooves, each corresponding to a locking block, and the locking block is located in the mounting groove; a guide slot is provided below the electromagnet module; the conductive on / off state of the first conductive contact rod and the second conductive contact rod is connected in series in the energizing circuit of the electromagnet module; when the electromagnet module is in the state of attracting the locking block, part of the locking block is located in the guide slot, and the other part is located in the mounting groove.

[0006] Preferably, it also includes a solar power supply mechanism; the solar panel of the solar power supply mechanism is fixedly installed on the outer wall of the tower, and the solar power supply mechanism is used to supply power to each of the electromagnet modules.

[0007] Preferably, an annular locking base plate is fixed to the top of the tower; the inner sidewall of the locking base plate is provided with the gear ring; the gear mechanism includes a rack, which is rotatably disposed in the nacelle around a third vertical axis; the third vertical axis is parallel to the second vertical axis; a first gear is fixed to the lower end of the rack, and the first gear meshes with the gear ring; the upper end of the rack meshes with the determination wheel through a gear set.

[0008] Preferably, the determination wheel is provided with a plurality of arc-shaped conductive areas, each conductive area being evenly distributed circumferentially around the axis of the determination wheel; a buffer device is fixedly provided on the determination wheel between two adjacent conductive areas; the buffer device has an elastic abutment end, the elastic abutment end being located on the rotation path of the rod head of the second conductive contact rod around the second vertical axis; the second conductive contact rod can elastically squeeze the elastic abutment end to make it elastically retract.

[0009] Preferably, the first conductive contact rod is fixed inside the cabin by a fixed bracket; the wind vane's wind direction lever is rotatably connected to the cabin by a fixed bearing; and the lower end of the wind vane's wind direction lever is rotatably connected to the first conductive contact rod by a first rotating bearing; the determination wheel is rotatably connected to the first conductive contact rod about the second vertical axis by a second rotating bearing.

[0010] Preferably, there are multiple magnetic locking units, and each magnetic locking unit is circumferentially distributed around the axis of the tower; at least the inner bottom surface of the mounting groove is provided with an elastic wear-resistant layer.

[0011] Preferably, a tower bearing is provided above the locking base plate, the inner ring of the tower bearing is fixedly connected to the engine compartment, and the outer ring of the tower bearing is fixedly connected to the locking base plate; a plurality of guide sleeves are fixedly provided on the locking base plate and outside the outer ring of the tower bearing, each guide sleeve corresponding to one of the electromagnet modules, and the guide sleeves are provided with mounting grooves for placing the locking blocks. Preferably, the electromagnet module includes a magnet housing and an electromagnet body; the electromagnet body is fixed inside the magnet housing and is fixed as a whole to the inner bottom of the cabin; a guide slot is provided on the bottom surface of the cabin corresponding to the iron core position of the electromagnet body; the end of the guide slot near the locking block is flared.

[0012] Preferably, the first conductive contact rod has a built-in dual circuit, one end of which is electrically connected to the head of the second conductive contact rod via an electric slip ring; the other end of which is electrically connected to the head of the first conductive contact rod.

[0013] Preferably, the determination wheel, from its center outwards radially, comprises an inner insulating area, a conductive area, and an outer insulating area; an insulating strip separates two adjacent conductive areas; the buffer device is fixedly disposed in the outer insulating area and corresponds one-to-one with the insulating strip; the buffer device includes a buffer housing, a buffer spring, and a buffer head; the buffer housing is fixed to the outer insulating area; the buffer spring is disposed inside the buffer housing; one end of the buffer head is slidably disposed inside the buffer housing, and the other end of the buffer head is located outside the buffer housing; the free end of the buffer spring is connected to the buffer head; the buffer head has an arc-shaped surface corresponding to the contact position of the second conductive contact rod.

[0014] The present invention achieves the following technical effects compared to the prior art: The yaw locking device for wind turbines provided by this invention achieves accurate determination of wind direction and nacelle orientation through the mechanical contact and electrical conduction between the first and second conductive contact rods and the determination wheel, completely eliminating reliance on complex sensors and main control systems, and significantly reducing costs and failure rates. Simultaneously, a gear mechanism establishes a purely mechanical linkage between the gear ring on the tower and the determination wheel, ensuring real-time synchronization of the determination wheel's orientation and eliminating orientation misalignment at the source. Furthermore, the locking mechanism uses an electromagnet module to attract and lock the locking block instead of traditional friction or hydraulic pin locking, eliminating the risk of friction plate wear and hydraulic leakage. The conductive on / off state of the first and second conductive contact rods is directly connected in series in the electromagnet module's energized circuit, achieving agile response with automatic locking upon orientation alignment and automatic unlocking upon deviation, along with the safety protection effect of automatic unlocking upon power failure. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 A schematic diagram of the overall structure of the yaw locking device for a wind turbine provided by the present invention; Figure 2 A schematic diagram of the wind vane in the yaw locking device of the wind turbine provided by the present invention; Figure 3 A schematic diagram of the first conductive contact rod, the second conductive contact rod, and the determination wheel structure in the yaw locking device for a wind turbine provided by the present invention; Figure 4 A top view of the yaw locking device for a wind turbine provided by the present invention, which determines the structure of the wheel disk. Figure 5 A schematic diagram of the buffer device in the yaw locking device of the wind turbine provided by the present invention; Figure 6 A schematic diagram of the gear mechanism in the yaw locking device of the wind turbine provided by the present invention; Figure 7 A top view of the locking base plate in the yaw locking device of the wind turbine provided by the present invention; Figure 8 This is a partial structural diagram of the locking base plate in the yaw locking device for a wind turbine provided by the present invention.

[0017] In the picture: 1-Navy; 11-Navy roof; 2-blade; 3-Tower; 4-Solar panels; 5-Weathervane; 6-Judgment mechanism; 61-Fixed bearing; 62-Fixed bracket; 63-Dual circuit; 64-First conductive contact rod; 65-Second conductive contact rod; 66-First rotating bearing; 67-Buffer device; 68-Judgment wheel; 69-Electric slip ring; 612-Wind direction lever; 641-First conductive rod head; 651-Second conductive rod head; 671-Buffer housing; 672-Buffer head; 673-Buffer spring; 681-Wheel gear; 682-External insulation area of ​​wheel; 683-Conductive area of ​​wheel; 684-Internal insulation area of ​​wheel; 685-Insulating strip of wheel; 7-Locking mechanism; 71-Locking base plate; 72-Locking block; 73-Tower bearing; 74-Electromagnet module; 75-Guide sleeve; 76-Silicone pad; 741-Magnet housing; 742-Electromagnet body; 743-Guide slot; 81 - First gear; 82 - Second gear; 83 - Third gear; 84 - Fourth gear. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] The purpose of this invention is to provide a yaw locking device for wind turbines to solve the problems existing in the prior art. It has a simple structure, can achieve precise alignment and automatic stable locking of the wind turbine nacelle, and has high reliability.

[0020] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] Example 1 This embodiment provides a yaw locking device for a wind turbine, such as... Figures 1-8 As shown, it includes: The tower 3 has a nacelle 1 that rotates around a first vertical axis (one end of the nacelle 1 has a blade 2 and the other end has a tail fin, which is a passive generator, and the wind drives the nacelle 1 to rotate relative to the tower 3 through the tail fin). The nacelle 1 has a wind vane 5 (top of the nacelle 11) that rotates around a second vertical axis; the first vertical axis is parallel to the second vertical axis. The determination mechanism 6 includes a first conductive contact rod 64 for representing the direction of the wind vane 5 and a second conductive contact rod 65 for representing the direction of the cabin 1; a determination wheel 68 is provided between the first conductive contact rod 64 and the second conductive contact rod 65 (the first conductive rod head 641 of the first conductive contact rod 64 and the second conductive rod head 651 of the second conductive contact rod 65 are both composed of conductive blocks and compression springs, which have elastic extension and contraction functions and can always be in close contact with the surface of the determination wheel 68 to ensure the stability of conductive contact), and the determination wheel 68 rotates around a second vertical axis. The line is rotated inside the cabin 1 (the determination wheel 68, the first rotating bearing 66, and the wind direction lever 612 rotate independently and do not interfere with each other; the three are coaxially arranged); the determination wheel 68 is provided with a wheel conductive area 683 (the wheel conductive area 683 is a conductive structure formed by stamping thick copper sheet). When the wind direction 5 is consistent with the orientation of the cabin 1, the rod heads of the first conductive contact rod 64 and the second conductive contact rod 65 are electrically connected through the wheel conductive area 683 (when the wind direction is consistent with the orientation of the cabin 1, the two sets of rod heads synchronously contact the same conductive area, and the circuit is fully conductive). The gear mechanism is located inside the engine compartment 1. A gear ring is provided on the tower 3. The input end of the gear mechanism meshes with the gear ring, and the output end of the gear mechanism meshes with the judgment wheel 68. The locking mechanism 7 includes at least one magnetic locking unit, which includes an electromagnet module 74 and a locking block 72. The electromagnet module 74 is fixed inside the cabin 1. The top of the tower 3 is provided with multiple mounting grooves, which correspond one-to-one with the locking blocks 72, and the locking blocks 72 are located in the mounting grooves. A guide slot 743 is provided below the electromagnet module 74. The conductive on / off state of the first conductive contact rod 64 and the second conductive contact rod 65 is connected in series in the power circuit of the electromagnet module 74. When the electromagnet module 74 is in the state of adsorbing the locking block 72, part of the locking block 72 is located in the guide slot 743, and the other part is located in the mounting groove.

[0022] By utilizing the mechanical contact and electrical conduction between the first conductive contact rod 64, the second conductive contact rod 65, and the determination wheel 68 through the determination mechanism 6, the wind direction and the nacelle 1 orientation can be accurately determined, completely eliminating the reliance on complex sensors and main control systems, and significantly reducing costs and failure rates. At the same time, the gear mechanism establishes a purely mechanical linkage between the gear ring on the tower 3 and the determination wheel 68, ensuring that the orientation of the determination wheel 68 is synchronized in real time, eliminating orientation misalignment from the source. In addition, the locking mechanism 7 uses an electromagnet module 74 to attract the locking block 72 instead of the traditional friction or hydraulic pin locking, eliminating the risk of friction plate wear and hydraulic leakage. Furthermore, the conductive on / off state of the first conductive contact rod 64 and the second conductive contact rod 65 is directly connected in series in the energized circuit of the electromagnet module 74, achieving a rapid response of automatic locking when the orientation is aligned and automatic unlocking when the orientation is misaligned, as well as the safety protection effect of automatic unlocking when the power is off.

[0023] Specifically, the determination mechanism 6, through the cooperation of the wind vane 5 and the gear mechanism, uses the positional comparison of the conductive contact rod on the determination wheel 68 to accurately detect the wind direction and the direction of the nacelle 1. When the wind turbine generates electricity and the direction of the wind vane 5 is consistent with the direction of the nacelle 1, the series circuit is closed, the solar panel 4 supplies power to the electromagnet to generate magnetic force, attracting the locking block 72 to overcome gravity and enter the guide slot 743, completing the yaw lock. Otherwise, it is disengaged, and the locking block 72 falls under gravity to unlock. This embodiment uses a combination of pure mechanical and electromagnetic methods to achieve yaw lock, without relying on the main control system, with fast response speed, reliable locking, and automatic unlocking protection function in case of power failure; it is suitable for the yaw system of passively yawed horizontal axis wind turbine generator sets.

[0024] Among them, such as Figures 1-3 , Figure 6 and Figure 8 As shown, the relevant settings for tower 3 are explained below: In the optional solutions of this embodiment, a more preferred option is to further include a solar power supply mechanism; the solar panel 4 of the solar power supply mechanism is fixedly installed on the outer wall of the tower 3, and the solar power supply mechanism is used to supply power to each electromagnet module 74.

[0025] Specifically, the solar power supply mechanism includes a solar panel 4, a control mechanism, and an energy storage battery. The control mechanism and the energy storage battery are both installed at the top of the tower 3 near the solar panel 4. The solar panel 4 continuously supplies power to each electromagnet module 74 through the control mechanism and the energy storage battery.

[0026] In the optional scheme of this embodiment, the first conductive contact rod 64 is fixed inside the cabin 1 by a fixed bracket 62; the wind direction rotating rod 612 of the wind vane 5 is rotatably connected to the cabin 1 by a fixed bearing 61; and the lower end of the wind direction rotating rod 612 of the wind vane 5 is rotatably connected to the first conductive contact rod 64 by a first rotating bearing 66; the determination wheel 68 is rotatably connected to the first conductive contact rod 64 about a second vertical axis by a second rotating bearing.

[0027] Among them, such as Figures 1-6 As shown, the relevant settings for the determination mechanism 6 are explained below: In the optional embodiments of this example, a preferred embodiment is that the determination wheel 68 is provided with a plurality of arc-shaped wheel conductive areas 683, and each wheel conductive area 683 is evenly distributed circumferentially around the axis of the determination wheel 68; a buffer device 67 is fixedly provided on the determination wheel 68 between two adjacent wheel conductive areas 683; the buffer device 67 has an elastic abutment end, which is located on the rotation path of the rod head of the second conductive contact rod 65 around the second vertical axis; the second conductive contact rod 65 can elastically squeeze the elastic abutment end to make it elastically retract.

[0028] In the optional solutions of this embodiment, it is more preferred that the first conductive contact 64 has a built-in dual circuit 63, one end of which is electrically connected to the rod head (second conductive rod head 651) of the second conductive contact 65 through an electric slip ring 69; and one end of the other circuit is electrically connected to the rod head (first conductive rod head 641) of the first conductive contact 64.

[0029] In the optional solutions of this embodiment, a more preferred embodiment is that the determining wheel 68, from the center outwards radially, consists of an inner insulating area 684, a conductive area 683, and an outer insulating area 682 (the outer insulating area 682, the inner insulating area 684, and the insulating strip 685 are all made of high-strength insulating and wear-resistant material); the insulating strip 685 is located between two adjacent conductive areas 683; the buffer device 67 is fixedly disposed in the outer insulating area 682 and is connected to the insulating strip 685. One-to-one correspondence; the buffer device 67 includes a buffer housing 671, a buffer spring 673, and a buffer head 672; the buffer housing 671 is fixed to the outer insulation area 682 of the wheel; the buffer spring 673 is disposed inside the buffer housing 671; one end of the buffer head 672 is slidably disposed inside the buffer housing 671, and the other end of the buffer head 672 is located outside the buffer housing 671; the free end of the buffer spring 673 is connected to the buffer head 672; the buffer head 672 is provided with an arc-shaped surface at the position corresponding to the contact of the second conductive contact rod 65.

[0030] Specifically, when the second conductive rod head 651 slides past the wheel insulating belt 685, it squeezes the buffer head 672 and compresses the buffer spring 673 to achieve retraction, forming an elastic buffer protection for the second conductive rod head 651.

[0031] Specifically, the first conductive rod head 641 slides in contact with the lower side of the annular area of ​​the wheel conductive area 683, and the second conductive rod head 651 slides in contact with the upper side of the annular area of ​​the wheel conductive area 683. The two are vertically corresponding and can achieve vertical conduction. When the first conductive rod head 641 and the second conductive rod head 651 slide synchronously into the same wheel conductive area 683, the dual circuits 63 of the detection circuit are electrically connected.

[0032] Specifically, when the first conductive contact rod 64 and the second conductive contact rod 65 are electrically connected, the electromagnet module 74 in the locking mechanism 7 generates magnetic force. The nacelle 1 is slightly swayed by the wind, causing the guide sleeve 75 to move to the bottom of the electromagnet module 74. The locking block 72 moves upward against gravity under the magnetic attraction and is locked into the guide slot 743, thus completing the yaw locking of the wind turbine nacelle 1.

[0033] Specifically, the 68 wheel adopts a partitioned insulating conductive structure, which is divided into multiple fan-shaped conductive areas 683 by the wheel insulating strip 685. The conductive areas are made of thick copper sheets to ensure conductivity, while the remaining areas are completely insulated.

[0034] Specifically, the electromagnet body 742, the first conductive rod head 641, and the second conductive rod head 651 are connected in series to form a control circuit, and a power generation trigger switch is connected in series in the control circuit. When the wind turbine is generating electricity normally, the power generation trigger switch is automatically closed. Only when the wind vane 5 and the nacelle 1 are in the same azimuth area and the control circuit is fully connected, the electromagnet body 742 is energized and magnetized, triggering the yaw lock action.

[0035] Among them, such as Figure 1 , Figures 6-8 As shown, the relevant settings for the gear mechanism are explained below: In the optional scheme of this embodiment, more preferably, an annular locking base plate 71 (the locking base plate 71 is an annular structure made of thick metal plate) is fixed at the top of the tower 3; the inner sidewall of the locking base plate 71 is provided with a gear ring; the gear mechanism includes a rack, which is rotatably disposed in the cabin 1 around a third vertical axis (a necessary connecting bracket is provided between the rack and the cabin 1 so that the rack can rotate stably in the cabin 1); the third vertical axis is parallel to the second vertical axis; a first gear 81 is fixed at the lower end of the rack, and the first gear 81 meshes with the gear ring; the upper end of the rack meshes with the judgment wheel 68 (the outer side of the judgment wheel 68 is a wheel gear 681) through a gear set (including a second gear 82, a third gear 83 and a fourth gear 84).

[0036] Among them, such as Figure 1 , Figures 6-8 As shown, the following are the settings instructions for the locking mechanism 7: In the optional solutions of this embodiment, it is more preferred that there are multiple magnetic locking units, and each magnetic locking unit is circumferentially distributed around the axis of the tower cylinder 3; at least the inner bottom surface of the placement groove is provided with an elastic wear-resistant layer (such as a silicone pad 76).

[0037] Specifically, the locking block 72 is placed on the upper side of the silicone pad 76, and the top of the locking block 72 is 1-2mm higher than the top of the guide sleeve 75 (but does not affect the passage of the electromagnet module 74).

[0038] Specifically, the silicone pad 76 is made of highly elastic insulating silicone material; when the electromagnet module 74 is de-energized and demagnetized, the locking block 72 loses its magnetic attraction and falls back to the upper side of the silicone pad 76 under its own gravity. The elastic deformation of the silicone pad 76 achieves the buffering effect of the locking block 72 falling back, avoiding rigid impact damage to the components.

[0039] Specifically, the number of metal locking blocks 72 set on the locking base plate 71 is the same as the number of conductive areas 683 on the wheel.

[0040] In the optional solutions of this embodiment, a tower bearing 73 is provided above the locking base plate 71 (the nacelle 1 and the tower 3 are rotatably connected through the tower bearing 73). The inner ring of the tower bearing 73 is fixedly connected to the nacelle 1, and the outer ring of the tower bearing 73 is fixedly connected to the locking base plate 71. A plurality of guide sleeves 75 are fixedly provided on the locking base plate 71 and outside the outer ring of the tower bearing 73. The guide sleeves 75 correspond one-to-one with the electromagnet modules 74. The guide sleeves 75 are provided with placement grooves for placing the lock blocks 72.

[0041] In the optional solutions of this embodiment, the preferred embodiment is that the electromagnet module 74 includes a magnet housing 741 and an electromagnet body 742; the electromagnet body 742 is fixed inside the magnet housing 741 and is fixed as a whole to the inner bottom of the cabin 1; a guide slot 743 is provided on the bottom surface of the cabin 1 corresponding to the iron core position of the electromagnet body 742 (the guide slot 743 is an annular shallow groove structure opened on the lower side of the bottom of the cabin 1, the guide slot 743 fits with the iron core structure of the electromagnet module 74, and the lower end of the guide slot 743 extends downward by 2mm more than the bottom end of the iron core of the electromagnet module 74; the bottom end of the iron core of the electromagnet module 74 maintains a gap of 3mm-5mm with the top end of the locking block 72, and the groove outline of the guide slot 743 precisely fits with the top outline of the locking block 72); the end of the guide slot 743 near the locking block 72 is flared.

[0042] Regarding other relevant explanations: Specifically, multi-stage gear transmission ensures that the judgment wheel 68 and the tower 3 are synchronized in direction, and a partitioned conductive wheel with dual conductive contact rods is used to achieve accurate direction determination, eliminating the problems of alignment deviation and locking failure in traditional structures, and greatly improving locking accuracy.

[0043] Specifically, equipped with a solar energy storage power supply mechanism, it can independently supply power to the electromagnetic locking structure, eliminating the dependence on external power sources. It can work normally even when the wind turbine is stopped or in the field without power supply, with low energy consumption and wide adaptability.

[0044] Specifically, a contact rod buffer structure and a locking block 72 silicone buffer structure are respectively set to avoid rigid impacts during equipment operation and unlocking, reduce component wear and noise, and significantly improve the overall service life of the equipment.

[0045] Specifically, the entire process achieves automatic wind direction alignment determination, electromagnetic automatic locking, and automatic unlocking upon power failure, requiring no manual operation. It features a compact structure, high component integration, low failure rate, and low maintenance costs.

[0046] Specifically, it adopts a dual-trigger control logic, which triggers locking only when the wind turbine is generating electricity and its orientation is accurately aligned. It can effectively adapt to various working conditions such as normal wind turbine power generation, wind-induced shutdown, and equipment idling, making it highly practical.

[0047] Equipment working principle: When the wind turbine is generating electricity normally, the circuit power generation trigger switch is closed; the wind vane 5 tracks the wind direction in real time and rotates. When the nacelle 1 rotates to the optimal windward angle consistent with the wind direction, the first conductive contact rod 64 and the second conductive contact rod 65 are aligned to the same wheel conductive area 683, the detection circuit is fully connected, and the electromagnet body 742 is energized to generate magnetic force; the nacelle 1 is slightly swayed by the wind, causing the guide sleeve 75 to move to directly below the electromagnet body 742, the locking block 72 is attracted upward by the magnetic force and moves into the guide slot 743, locking the yaw angle of the nacelle 1 and completing the locking operation.

[0048] When the wind direction shifts, the nacelle 1 is misaligned, or the wind turbine fails to generate electricity, the conductive rod head detaches from the same conductive area, the circuit is broken, the electromagnet body 742 is demagnetized, the locking block 72 loses its magnetic attraction, and falls back onto the silicone pad 76 under the action of gravity. The silicone pad 76 buffers and absorbs shock, realizing automatic unlocking, and the nacelle 1 can adaptively rotate and adjust its direction again.

[0049] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A yaw locking device for a wind turbine, characterized in that: include: The tower has a nacelle that rotates about a first vertical axis, and the nacelle has a wind vane that rotates about a second vertical axis. The first vertical axis is parallel to the second vertical axis; The determination mechanism includes a first conductive contact rod for representing the direction of the wind vane and a second conductive contact rod for representing the direction of the cabin; a determination wheel is provided between the first conductive contact rod and the second conductive contact rod, and the determination wheel is rotatably disposed within the cabin around a second vertical axis; the determination wheel is provided with a wheel conductive area, and when the direction of the wind vane is consistent with the orientation of the cabin, the rod heads of the first conductive contact rod and the second conductive contact rod are electrically connected through the wheel conductive area; A gear mechanism is provided inside the engine compartment. A gear ring is provided on the tower. The input end of the gear mechanism meshes with the gear ring, and the output end of the gear mechanism meshes with the determination wheel. A locking mechanism, comprising at least one magnetic locking unit, the magnetic locking unit comprising an electromagnet module and a locking block; The electromagnet module is fixed inside the cabin; the top of the tower is provided with multiple mounting grooves, each corresponding to a locking block, and the locking block is located within the mounting groove; a guide slot is provided below the electromagnet module; the conductivity of the first conductive contact rod and the second conductive contact rod is connected in series in the energizing circuit of the electromagnet module; when the electromagnet module is in the state of attracting the locking block, a part of the locking block is located in the guide slot, and the other part is located in the mounting groove.

2. The yaw locking device for a wind turbine generator according to claim 1, characterized in that: It also includes a solar power supply mechanism; the solar panels of the solar power supply mechanism are fixedly installed on the outer wall of the tower, and the solar power supply mechanism is used to supply power to each of the electromagnet modules.

3. The yaw locking device for a wind turbine generator according to claim 1, characterized in that: The top of the tower is fixed with an annular locking base plate; the inner sidewall of the locking base plate is provided with the toothed ring; The gear mechanism includes a rack, which is rotatably mounted in the cabin about a third vertical axis; the third vertical axis is parallel to the second vertical axis; a first gear is fixed to the lower end of the rack, and the first gear meshes with the gear ring; the upper end of the rack meshes with the determination wheel through a gear set.

4. The yaw locking device for a wind turbine generator according to claim 1, characterized in that: The determination wheel is provided with multiple arc-shaped conductive areas, and each conductive area is evenly distributed around the axis of the determination wheel; a buffer device is fixedly provided on the determination wheel between two adjacent conductive areas. The buffer device has an elastic abutment end located on the rotation path of the rod head of the second conductive contact rod around the second vertical axis; the second conductive contact rod can elastically squeeze the elastic abutment end to make it elastically retract.

5. The yaw locking device for a wind turbine according to claim 1, characterized in that: The first conductive contact rod is fixed inside the cabin by a fixing bracket; The wind vane's wind direction lever is rotatably connected to the nacelle via a fixed bearing; and the lower end of the wind vane's wind direction lever is rotatably connected to the first conductive contact rod via a first rotating bearing. The determination wheel is rotatably connected to the first conductive contact rod about the second vertical axis via a second rotating bearing.

6. The yaw locking device for a wind turbine according to claim 1, characterized in that: The magnetic locking unit is multiple, and each magnetic locking unit is circumferentially distributed around the axis of the tower. The recessed groove has at least an elastic wear-resistant layer on its inner bottom surface.

7. The yaw locking device for a wind turbine according to claim 3, characterized in that: A tower bearing is provided above the locking base plate. The inner ring of the tower bearing is fixedly connected to the nacelle, and the outer ring of the tower bearing is fixedly connected to the locking base plate. Multiple guide sleeves are fixedly provided on the locking base plate and outside the outer ring of the tower bearing. Each guide sleeve corresponds to an electromagnet module. The guide sleeve is provided with a mounting groove for placing the lock block.

8. The yaw locking device for a wind turbine according to claim 1, characterized in that: The electromagnet module includes a magnet housing and an electromagnet body; the electromagnet body is fixed inside the magnet housing and is also fixed to the bottom of the cabin; a guide slot is provided on the bottom surface of the cabin corresponding to the iron core position of the electromagnet body; the end of the guide slot near the locking block is flared.

9. The yaw locking device for a wind turbine according to claim 2, characterized in that: The first conductive contact rod has a built-in dual circuit. One end of one circuit is electrically connected to the head of the second conductive contact rod via an electric slip ring; the other end of the circuit is electrically connected to the head of the first conductive contact rod.

10. The yaw locking device for a wind turbine generator according to claim 4, characterized in that: The determination wheel consists of, from the center outwards radially, an inner insulating area, a conductive area, and an outer insulating area; an insulating strip separates two adjacent conductive areas. The buffer device is fixedly installed in the outer insulation area of ​​the wheel disk and corresponds one-to-one with the insulation strip of the wheel disk; The buffer device includes a buffer housing, a buffer spring, and a buffer head; the buffer housing is fixed to the outer insulating area of ​​the wheel; the buffer spring is disposed inside the buffer housing; one end of the buffer head is slidably disposed inside the buffer housing, and the other end of the buffer head is located outside the buffer housing; the free end of the buffer spring is connected to the buffer head; the buffer head is provided with an arc-shaped surface at the position corresponding to the contact of the second conductive contact rod.

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