Safety guard and wind turbine generator system

Abstract

The present application relates to a kind of safety protection device, for wind turbine unit, wind turbine unit includes hub and the blade being rotatably connected with hub by variable pitch bearing, safety protection device includes: locking component, including first connecting part and engaging piece being connected with each other, first connecting part is used to connect with one of hub and variable pitch bearing;Trigger component, including second connecting part and trigger piece being connected with each other, second connecting part is used to connect with the other of hub and variable pitch bearing, one of engaging piece and trigger piece can be connected with the other of engaging piece and trigger piece after rotating with variable pitch bearing relative to hub by predetermined angle, to lock the relative position between blade and hub.The safety protection device and wind turbine unit provided by the embodiment of the present application, safety protection device can realize the locking of blade position when variable pitch system such as gear belt fails, to ensure the safety of wind turbine unit.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of wind power technology, in particular to a safety protection device and a wind turbine generator. BACKGROUND

[0002] The wind turbine generator is a device for converting wind energy into electric energy, mainly including a cabin, a generator, a blade wheel, a tower and other components. The blade wheel, as the wind energy absorption component of the entire fan, is a key component of the wind turbine generator. It is not only the key channel for the output of the power generation capacity of the wind turbine generator, but also a strong support for the safe operation of the wind turbine generator. It is also the core component of the wind turbine generator. In order to effectively realize the high efficiency of the wind turbine generator and reliable operation, a variable pitch system is provided, so that the blade can rotate relative to the hub to a predetermined position to better utilize wind energy. The variable pitch system can adopt the form of toothed belt driving variable pitch, motor driving or hydraulic driving variable pitch.

[0003] When the form of toothed belt driving variable pitch is adopted, since the wind turbine generator works in the outdoor wilderness environment, there is a risk of toothed belt fracture during long-term operation of the toothed belt. After the toothed belt is broken, the blade will be in a free state, thereby affecting the safe operation of the wind turbine generator.

[0004] Therefore, there is an urgent need for a safety protection device and a new wind turbine generator. SUMMARY

[0005] The embodiment of the present application provides a safety protection device and a wind turbine generator. The safety protection device can lock the position of the blade when the variable pitch system such as the toothed belt fails, so as to ensure the safety of the wind turbine generator.

[0006] In one aspect, the present application provides a safety protection device for a wind turbine generator. The wind turbine generator includes a hub and a blade rotatably connected to the hub through a variable pitch bearing. The safety protection device includes a locking component including a first connecting part and an engaging piece connected to each other, the first connecting part being used for connecting with one of the hub and the variable pitch bearing; a triggering component including a second connecting part and a triggering piece connected to each other, the second connecting part being used for connecting with the other of the hub and the variable pitch bearing, one of the engaging piece and the triggering piece being capable of connecting with the other of the engaging piece and the triggering piece after the variable pitch bearing rotates relative to the hub by a predetermined angle, so as to lock the relative position between the blade and the hub.

[0007] According to one aspect of the embodiment of the present application, the engaging piece includes a mounting frame and a locking part connected to the mounting frame, the first connecting part is arranged on the mounting frame, and the triggering piece is capable of at least partially extending into the locking part and being detachably connected with the locking part.

[0008] According to an aspect of the embodiment of the present application, the locking part comprises a pair of locking units, at least a part of each of the pair of locking units is movable towards or away from each other to clamp or release the trigger.

[0009] According to an aspect of the embodiment of the present application, the locking unit comprises a locking block and an adjusting module, the locking block is movably connected to the mounting frame, the adjusting module is connected between the locking block and the mounting frame and drives the locking block to move relative to the mounting frame to clamp or release the trigger.

[0010] According to an aspect of the embodiment of the present application, the adjusting module comprises an adjusting rod and an elastic member, one end of the adjusting rod is connected to the locking block and the other end is connected to the mounting frame, one end of the elastic member abuts against the locking block and the other end abuts against the mounting frame, and the end of the adjusting rod away from the locking block is connected with an adjusting nut.

[0011] According to an aspect of the embodiment of the present application, the adjusting module comprises a telescopic cylinder, one of the cylinder body and the cylinder rod of the telescopic cylinder is connected to the locking block and the other is connected to the mounting frame.

[0012] According to an aspect of the embodiment of the present application, the mounting frame is provided with a guide rail, each of the locking blocks is provided with a sliding groove in sliding fit with the guide rail, and the locking blocks are in sliding connection with the guide rail.

[0013] According to an aspect of the embodiment of the present application, the engaging part further comprises an adapter frame, and each of the adjusting modules is indirectly connected to the mounting frame through the adapter frame away from the locking block.

[0014] According to an aspect of the embodiment of the present application, the mounting frame comprises a locking support and an elastic support, the locking support and the elastic support are connected to each other and jointly enclose a receiving cavity, the locking part is arranged in the receiving cavity and connected to the locking support, and the locking support is provided with an avoiding hole in communication with the receiving cavity and for the trigger to extend into.

[0015] According to an aspect of the embodiment of the present application, the first connecting part comprises a plurality of connecting holes arranged on the locking support, and the plurality of connecting holes are distributed at intervals and respectively in communication with the receiving cavity.

[0016] According to an aspect of the embodiment of the present application, the trigger comprises an extending rod and a clamping part, the extending rod is connected between the second connecting part and the clamping part, the clamping part is at least partially arranged on a side wall surface of the extending rod, and the clamping part is capable of extending into the locking part and detachably connected with the locking part.

[0017] According to an aspect of the embodiment of the present application, in the extending direction of the extending rod, the cross-sectional dimension of the clamping part gradually decreases, and the cross-sectional dimension of the end of the clamping part connected with the extending rod is greater than the cross-sectional dimension of the end of the clamping part away from the extending rod.

[0018] According to an aspect of the embodiment of the present application, the second connecting part comprises a connecting base, and the connecting base is provided with a plurality of connecting holes, and the trigger member is connected to the connecting base.

[0019] According to an aspect of the embodiment of the present application, at least part of the engaging member is an electromagnet, at least part of the trigger member is a magnetic attraction member, and the electromagnet is capable of being attracted to the magnetic attraction member and being connected to each other.

[0020] On the other hand, the embodiment of the present application provides a wind turbine generator set, comprising: a hub; a variable pitch bearing connected to the hub; a blade provided on the variable pitch bearing and rotationally connected to the hub through the variable pitch bearing; the safety protection device described above, the locking member is connected to one of the hub and the variable pitch bearing through the first connecting part, the trigger member is connected to the other of the hub and the variable pitch bearing through the second connecting part, and one of the engaging member and the trigger member is capable of being connected to the other of the engaging member and the trigger member after rotating a predetermined angle relative to the hub with the variable pitch bearing, so as to lock the relative position between the blade and the hub.

[0021] The safety protection device and the wind turbine generator set provided by the embodiment of the present application, the safety protection device comprises a locking member and a trigger member, the locking member can be connected to one of the hub and the variable pitch bearing through the first connecting part, the trigger member can be connected to the other of the hub and the variable pitch bearing through the second connecting part, when the yaw system of the wind turbine generator set is normally operated, the locking member and the trigger member can be separately arranged, and when the yaw system fails, such as the toothed belt is broken, one of the engaging member and the trigger member is capable of being connected to the other of the engaging member and the trigger member after rotating a predetermined angle relative to the hub with the variable pitch bearing, so as to lock the relative position between the blade and the hub, and avoid that the blade in a free state brings hidden dangers to the safety of the wind turbine generator set. BRIEF DESCRIPTION OF DRAWINGS

[0022] The features, advantages, and technical effects of the exemplary embodiments of the present application will be described below with reference to the accompanying drawings.

[0023] Figure 1 is a schematic diagram of the overall structure of the wind turbine generator set of an embodiment of the present application;

[0024] Figure 2 is a schematic diagram of the local structure of the wind turbine generator set of an embodiment of the present application;

[0025] Figure 3 is a schematic diagram of the structure of the safety protection device of an embodiment of the present application;

[0026] Figure 4 is a schematic diagram of the local structure of the locking member of an embodiment of the present application;

[0027] Figure 5 is a schematic view of the overall structure of a locking component of one embodiment of the present application;

[0028] Figure 6 is a front view of a locking component of one embodiment of the present application;

[0029] Figure 7 is Figure 6 is a sectional view along the direction A-A in

[0030] Figure 8 is a schematic view of the structure of a triggering component of one embodiment of the present application

[0031] 1 - safety protection device;

[0032] 10 - locking component;

[0033] 11 - first connecting part; 111 - first connecting hole;

[0034] 12 - engaging member; 121 - mounting frame; 121a - locking support; 1211 - first locking plate; 1212 - second locking plate; 121b - elastic support; 121c - avoiding hole; 121d - accommodating cavity; 121e - deformation groove; 122 - locking unit; 122a - locking unit; 1221 - adjusting module; 1221a - adjusting rod; 1221b - elastic member; 1221c - adjusting nut; 1222 - locking block; 1223 - locking hole; 123 - adapter frame; 123a - first adapter plate; 123b - second adapter plate; 123c - adapter rod;

[0035] 20 - triggering component; 21 - second connecting part; 211 - second connecting hole; 212 - connecting seat; 212a - bottom plate; 212b - side plate; 212c - reinforcing plate; 22 - triggering member; 221 - extension rod; 222 - clamping part;

[0036] 2 - hub; 3 - variable pitch bearing; 4 - blade; 5 - tower; 6 - nacelle; 7 - generator; 8 - variable pitch motor; 9 - toothed belt.

[0037] In the drawings, the same parts are designated by the same reference numerals. The drawings are not drawn to scale. DETAILED DESCRIPTION

[0038] Features and exemplary embodiments of various aspects of the present application will be described below in detail. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, it will be apparent to one of ordinary skill in the art that the present application can be practiced without some or all of these specific details. The description of the embodiments is merely intended to provide a more detailed understanding of the present application. In the drawings and the following description, well-known structures and techniques have not been shown in order to avoid obscuring the present application; and, for clarity, some structures can be exaggerated. In addition, features described below can be combined in any suitable manner in one or more embodiments.

[0039] The orientation words appearing in the following description are the directions shown in the drawings, and do not limit the specific structure of the safety protection device and the wind turbine generator set of the present application. In the description of the present application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "mounting" and "connection" should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integral connection; can be direct connection, or indirect connection. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0040] In order to better understand the present application, the following will be described in conjunction with Figures 1 to 8 The safety protection device and the wind turbine generator set according to the embodiments of the present application are described in detail.

[0041] As Figure 1 , Figure 2 shown, the wind turbine generator set provided by the embodiments of the present application includes a tower 5, a nacelle 6, a generator 7 and a rotor. The tower 5 is connected to the wind turbine foundation, the nacelle 6 is arranged at the top end of the tower 5, and the nacelle 6 includes a nacelle base. The nacelle 6 can be connected to the tower 5 through the nacelle base. The generator 7 is arranged in the nacelle 6. In some examples, the generator 7 can be located outside the nacelle 6, and of course, in some examples, the generator 7 can also be located inside the nacelle 6.

[0042] The rotor includes a hub 2 and a plurality of blades 4 connected to the hub 2, and the blades can rotate relative to the hub 2. The generator 7 includes a rotatingly matched rotor and a stator. The rotor can be connected to the hub 2, and the stator can be connected to the nacelle base. When the wind acts on the blades 4, the blades 4 drive the hub 2 to rotate, and in turn drive the rotor to rotate relative to the stator, thereby achieving the power generation requirement of the wind turbine generator set.

[0043] In the process of operation of the wind turbine, in order to better obtain wind energy and convert it into electric energy, a variable pitch control technology is usually adopted, so as to improve the wind energy capturing capacity of the wind turbine and improve the availability and power generation of the wind turbine. The variable pitch control technology is simply to adjust the pitch angle of the blade 4, change the angle of attack of the airflow to the blade 4, and then control the aerodynamic torque and aerodynamic power captured by the impeller. When the variable pitch is required, the blade 4 needs to rotate relative to the hub 2. In order to meet the rotating connection requirement between the hub 2 and the blade 4, a corresponding variable pitch system needs to be provided to realize the rotation between the blade 4 and the hub 2.

[0044] The wind turbine provided by the embodiment of the present application further comprises a variable pitch system, which can adopt a variable pitch mode driven by a transmission belt, such as a variable pitch mode driven by a toothed belt 9. The variable pitch system comprises a variable pitch motor 8, a toothed belt 9 and a variable pitch bearing 3. The blade 4 is rotatably connected to the hub 2 through the variable pitch bearing 3. One of the inner ring and the outer ring of the variable pitch bearing 3 is connected to the hub 2, and the other is connected to the blade 4 and the toothed belt 9. The toothed belt 9 is driven to move by the variable pitch motor 8, thereby driving the blade 4 to rotate relative to the hub 2, and realizing variable pitch.

[0045] Since the wind turbine works in an outdoor open field environment, there is a risk of fracture of the toothed belt 9 during long-time operation of the toothed belt 9. After the toothed belt 9 is fractured, the blade 4 will be in a free state, thereby affecting the operation of the wind turbine.

[0046] Based on this, the wind turbine provided by the embodiment of the present application further comprises a safety protection device 1, which can lock the position of the blade 4 when the variable pitch system fails, so as to ensure the safety of the wind turbine. The safety protection device 1 provided by the embodiment of the present application can be used as an independent product, and of course can also be used in the wind turbine and as a component part of the wind turbine.

[0047] As shown in Figure 2 and Figure 3 The safety protection device 1 provided by the embodiment of the present application comprises a locking component 10 and a triggering component 20. The locking component 10 comprises a first connecting part 11 and an engaging part 12 connected to each other. The first connecting part 11 is used to be connected to one of the hub 2 and the variable pitch bearing 3. The triggering component 20 comprises a second connecting part 21 and a triggering part 22 connected to each other. The second connecting part 21 is used to be connected to the other of the hub 2 and the variable pitch bearing 3. One of the engaging part 12 and the triggering part 22 can be connected to the other of the engaging part 12 and the triggering part 22 after the variable pitch bearing 3 rotates relative to the hub 2 by a predetermined angle, so as to lock the relative position between the blade 4 and the hub 2.

[0048] The safety protection device 1 provided by the embodiment of the present application, the locking part 10 is connected to one of the hub 2 and the variable pitch bearing 3 through the first connecting part 11, the triggering part 20 is connected to the other of the hub 2 and the variable pitch bearing 3 through the second connecting part 21, when the yaw system of the wind turbine generator set is in normal operation, the locking part 122 and the triggering part 20 are separately arranged, when the yaw system fails, such as the toothed belt 9 is broken, one of the engaging part 12 and the triggering part 22 is connected to the other of the engaging part 12 and the triggering part 22 after rotating a predetermined angle relative to the hub 2 along with the variable pitch bearing 3, thereby locking the relative position between the blade 4 and the hub 2, avoiding the hidden danger to the safety of the wind turbine generator set when the blade 4 is in a free state due to the failure of the variable pitch system.

[0049] As shown in Figures 3 to 7 As an optional embodiment, the safety protection device 1 provided by the embodiment of the present application, the engaging part 12 comprises a mounting frame 121 and a locking part 122 connected to the mounting frame 121, the first connecting part 11 is arranged on the mounting frame 121, and the triggering part 22 is at least partially inserted into the locking part 122 and detachably connected to the locking part 122. The mounting frame 121 is arranged to facilitate the formation of the first connecting part 11 and the locking part 122, which can meet the connection requirement of the engaging part 12 to one of the hub 2 and the variable pitch bearing 3 through the first connecting part 11. Meanwhile, the locking part 122 is arranged to facilitate the combination with the triggering part 22, which can meet the locking requirement of the blade 4 when the variable pitch system fails. In addition, the detachable connection between the triggering part 22 and the locking part 122 can effectively avoid the influence of the safety protection device 1 on the variable pitch of the blade 4 when the variable pitch system is in normal operation, thereby ensuring the variable pitch requirement of the blade 4.

[0050] As shown in Figures 3 to 5 In some optional embodiments, the mounting frame 121 comprises a locking bracket 121a and an elastic bracket 121b, the locking bracket 121a and the elastic bracket 121b are connected to each other and jointly form an accommodating cavity 121d, the locking part 122 is arranged in the accommodating cavity 121d and connected to the locking bracket 121a, and the locking bracket 121a is provided with an avoiding hole 121c in communication with the accommodating cavity 121d and for the triggering part 22 to insert into. The mounting frame 121 adopts the above structure, which can meet the mounting requirement of the locking part 122, and the avoiding hole 121c is arranged to enable the triggering part 22 to insert into the avoiding hole 121c and cooperate with the locking part 122. In addition, the elastic bracket 121b is elastic during the rotation of the triggering part 22 relative to the locking part 122 and the impact of the triggering part 22 on the locking part 122, which can absorb the impact of the triggering part 22, thereby ensuring the locking effect between the triggering part 22 and the locking part.

[0051] As an optional implementation, the locking bracket 121a includes a first locking plate 1211 and a second locking plate 1212, one end of the first locking plate 1211 and the second locking plate 1212 are arranged in intersection and the other end extends in a direction away from each other, the locking bracket 121a as a whole is in V shape, and the avoiding hole 121c is arranged on the first locking plate 1211. Optionally, the first connecting part 11 is arranged on the second locking plate 1212.

[0052] Optionally, the elastic bracket 121b as a whole can be in the form of an arc-shaped plate body, one end of the elastic bracket 121b is connected to the first locking plate 1211 and the other end is connected to the second locking plate 1212, so as to jointly enclose the containing cavity 121d with the locking bracket 121a, and the mounting bracket 121 as a whole is in the form of a triangular frame.

[0053] Optionally, the first connecting part 11 includes a plurality of first connecting holes 111 arranged on the locking bracket 121a, and the plurality of first connecting holes 111 are spaced apart and respectively communicated with the containing cavity 121d. The first connecting part 11 adopts the above structure form, which is simple in structure and can effectively ensure the connection requirement with one of the hub 2 and the variable pitch bearing 3. In some optional implementations, the locking part 10 can be connected with the hub 2 through the first connecting part 11.

[0054] As an optional implementation, the plurality of first connecting holes 111 of the first connecting part 11 can be arranged on the second locking plate 1212 and penetrate through the second locking plate 1212. The number of the first connecting holes 111 included in the first connecting part 11 can be set according to the connection strength requirement.

[0055] In some optional embodiments, the elastic bracket 121b is provided with a deformation groove 121e communicated with the containing cavity 121d, and the arrangement of the deformation groove 121e can facilitate the deformation of the elastic bracket 121b and ensure the performance requirement of the mounting bracket 121.

[0056] As shown in Figures 3 to 7 As an optional implementation, the safety protection device 1 provided by the embodiment of the application includes a locking part 122, and the locking part 122 includes a pair of locking units 122a, and at least part of each of the pair of locking units 122a can move in a direction close to or away from each other to clamp or release the trigger 22. The locking part 122 adopts the form of the pair of locking units 122a, which can reliably achieve the locking and unlocking requirement between the locking part 122 and the trigger 22.

[0057] Optionally, the locking unit 122a comprises locking blocks 1222 connected with each other and an adjusting module 1221, the locking blocks 1222 arranged in pairs are formed with locking holes 1223 on the sides facing each other for plug-in cooperation with the trigger 22, the locking blocks 1222 are movably connected with the mounting frame 121, and the adjusting module 1221 is connected between the locking blocks 1222 and the mounting frame 121 and drives the locking blocks 1222 to move relative to the mounting frame 121 to clamp or release the trigger 22.

[0058] In some optional embodiments, the mounting frame 121 is provided with a guide rail, and each locking block 1222 is provided with a sliding groove slidingly matched with the guide rail, so that the locking blocks 1222 are slidingly connected with the guide rail. Thus, the locking blocks 1222 can move along the guide rail relative to the mounting frame 121, facilitating the adjustment of the size of the locking holes 1223.

[0059] The locking unit 122a adopts the above structure, so that when the pitch system fails and the blade 4 loses control, the trigger 22 can move to the side where the locking part 10 is located and plug into the locking hole 1223 formed between the two locking blocks 1222. The size of the locking hole 1223 can be adjusted by adjusting the relative positions of the two locking blocks 1222. For example, when the adjusting module 1221 adjusts the two locking blocks 1222 to move towards each other, the locking hole 1223 between them decreases, thereby clamping the trigger 22. When the pitch system failure is removed and the wind turbine generator system resumes normal operation, the two locking blocks 1222 can be adjusted by the adjusting module 1221 to move away from each other, so that the locking hole 1223 formed between the two locking blocks 1222 increases to release the trigger 22, so that the locking part 10 and the trigger part 20 can be separated from each other, ensuring that the blade 4 can rotate relative to the hub 2 after the fault contact to achieve pitch.

[0060] In some optional embodiments, the adjusting module 1221 comprises an adjusting rod 1221a and a resilient member 1221b, one end of the adjusting rod 1221a is connected to the locking block 1222 and the other end is connected to the mounting frame 121, one end of the resilient member 1221b abuts against the locking block 1222 and the other end abuts against the mounting frame 121, and the end of the adjusting rod 1221a away from the locking block 1222 is connected with an adjusting nut 1221c. Since the locking block 1222 is movably connected with the mounting frame 121, the resilient member 1221b can provide an elastic pushing force to the locking block 1222, so that the locking blocks 1222 arranged in pairs can move towards each other under the action of the resilient member 1221b to lock the trigger 22 and ensure the locking requirement of the position of the blade 4. When the trigger 22 is plugged into the locking hole 1223, the two locking blocks 1222 can be pushed away from each other first, and then the resilient member 1221b springs back to lock the trigger after the trigger 22 is plugged in.

[0061] Since the locking block 1222 is slidably connected with the mounting frame 121 through the guide rail, by setting the adjusting rod 1221a and the adjusting nut 1221c, the adjusting rod 1221a can be driven to move relative to the mounting frame 121 by screwing the adjusting nut 1221c, thereby driving the locking block 1222 connected thereto to move, so that the size of the locking hole 1223 is increased to release the trigger 22, ensuring that the blade 4 can realize normal pitch action relative to the hub 2 when the pitch system fault is removed.

[0062] In some optional embodiments, in order to meet the installation requirements of the adjusting module 1221, the mounting frame 121 can be provided with a corresponding protruding portion to connect with the adjusting module 1221. Of course, this is an optional implementation, and in some embodiments, the engagement member 12 can also include an adapter frame 123, and each adjusting module 1221 is indirectly connected with the mounting frame 121 through the adapter frame 123 away from the locking block 1222. On the basis of meeting the installation requirements of the adjusting module 1221, the safety protection device 1 can be easily formed.

[0063] As shown in Figures 3 to 7 In some optional embodiments, the adapter frame 123 includes a first adapter plate 123a and a second adapter plate 123b arranged opposite to each other on both sides of the mounting frame 121, and an adapter rod 123c connected between the first adapter plate 123a and the second adapter plate 123b. The adapter rod 123c extends into the accommodating cavity 121d of the mounting frame 121 and is connected with the mounting frame 121. Optionally, the adapter rod 123c is connected to the second locking plate 1212 of the mounting frame 121, and the two can be connected in a detachable connection mode by bolt fastening, or can be connected by welding.

[0064] Optionally, in the pair of locking units 122a, the adjusting rod 1221a and the elastic member 1221b of the adjusting module 1221 of one of the locking units 122a are connected with the mounting frame 121 through the first adapter plate 123a, and the adjusting nut 1221c is arranged to abut against a side of the first adapter plate 123a away from the accommodating cavity 121d. The adjusting rod 1221a and the elastic member 1221b of the adjusting module 1221 of the other locking unit 122a are connected with the mounting frame 121 through the second adapter plate 123b, and the adjusting nut 1221c is arranged to abut against a side of the second adapter plate 123b away from the accommodating cavity 121d.

[0065] It can be understood that the safety protection device 1 provided by the above-mentioned embodiments of the present application has the adjusting module 1221 including the adjusting rod 1221a and the elastic member 1221b, which is an optional embodiment. In some embodiments, the adjusting module 1221 can also include a telescopic cylinder, one of the cylinder body and the cylinder rod of the telescopic cylinder is connected to the locking block 1222, and the other is connected to the mounting frame 121. When the adapter frame 123 is included, the mounting frame 121 is indirectly connected through the adapter frame 123. The size of the cylinder rod extending out of the cylinder body of the telescopic cylinder is controlled to adjust the position of the locking block 1222 on the mounting frame 121, which can also meet the adjustment requirement of the size of the locking hole 1223 and ensure the locking and unlocking requirements of the trigger piece 22.

[0066] As shown in Figure 8 In some optional embodiments, the safety protection device 1 provided by the embodiments of the present application has the trigger piece 22 including the extension rod 221 and the clamping part 222, the extension rod 221 is connected between the second connecting part 21 and the clamping part 222, and the clamping part 222 is at least partially protruding from the side wall surface of the extension rod 221 and is arranged to be capable of extending into the locking part 122 and detachably connected with the locking part 122. The trigger piece 22 adopts the above-mentioned structure, so that when the trigger piece 22 cooperates with the engaging piece 12, the extension rod 221 and the clamping part 222 are inserted and cooperated with the engaging piece 12, and the clamping part 222 is arranged to protrude from the extension rod 221, so that after the trigger piece 22 cooperates with the engaging piece 12, the part of the clamping part 222 protruding from the extension rod 221 can play a limiting role, thereby ensuring the safety performance of the locking. In some optional embodiments, the extension rod 221 and the engaging piece 12 can extend into the locking part 122 of the engaging piece 12 and be detachably connected with the locking part 122. Optionally, after the trigger piece 22 cooperates with the engaging piece 12, the clamping part 222 can pass through the locking hole 1223 and the part protruding from the extension rod 221 can abut against the locking block 1222, thereby ensuring the locking effect.

[0067] Optionally, the cross-sectional size of the clamping part 222 gradually decreases along the extension direction of the extension rod 221, and the cross-sectional size of the end of the clamping part 222 connected with the extension rod 221 is greater than the cross-sectional size of the end of the clamping part 222 away from the extension rod 221. Through the above-mentioned arrangement, the end of the clamping part 222 facing the engaging piece 12 is tapered and forms an insertion tip, which is more conducive to the insertion and cooperation between the trigger piece 22 and the engaging piece 12 and ensures the locking requirement therebetween.

[0068] As an optional embodiment, the second connecting part 21 includes the connecting seat 212, the connecting seat 212 is provided with a plurality of second connecting holes 211, and the trigger piece 22 is connected to the connecting seat 212. The second connecting part 21 adopts the above-mentioned form, which is simple in structure and conducive to the mutual connection with the other one of the hub 2 and the variable-pitch bearing 3.

[0069] In some optional embodiments, the connecting seat 212 comprises a bottom plate 212a and a side plate 212b arranged in intersection, and a reinforcing plate 212c connected between the bottom plate 212a and the side plate 212b, the trigger 22 is connected with the side plate 212b through the extension rod 221, and a plurality of second connecting holes 211 are arranged on the reinforcing plate 212c and are arranged at intervals on the reinforcing plate 212c. The connecting seat 212 adopts the above form, has high strength and is easy to process.

[0070] It can be understood that the safety protection device 1 provided by the above-mentioned embodiments of the present application, the engagement member 12 and the trigger 22 are locked or unlocked in a way of being plugged into each other and being detachably connected through the locking portion 122, so as to lock the relative position of the hub 2 and the blade 4. This is an optional embodiment. In some embodiments, at least part of the engagement member 12 is an electromagnet, and at least part of the trigger 22 is a magnetic attraction member. The electromagnet can be attracted to the magnetic attraction member and be connected with each other. The relative position between the trigger 22 and the engagement member 12 is locked or unlocked by using the electromagnet to attract the magnetic attraction member. For example, the engagement member 12 is electrified, and when the trigger 22 and the engagement member 12 contact with each other, the relative position between them is locked by using magnetic attraction, and then the position of the blade 4 relative to the hub 2 is locked.

[0071] When the trigger 22 and the engagement member 12 are connected in a way of being plugged into each other, the trigger 22 is plugged into the inside of the engagement member 12, and the engagement member 12 is electrified to be magnetically attracted to the inserted part of the trigger 22. Optionally, when the engagement member 12 comprises the locking portion 122 mentioned in the above-mentioned embodiments, the locking portion 122 is partly made of an electromagnet, for example, the locking block 1222 of the locking portion 122 is made of an electromagnet, which can be magnetically attracted and locked alone, or can be magnetically attracted and locked in cooperation with mechanical locking to ensure the locking strength.

[0072] The safety protection device 1 provided by the embodiments of the present application can be used in a wind turbine generator set, and can make the locking part 10 connected to one of the hub 2 and the variable pitch bearing 3 through the first connecting part 11, and the triggering part 20 connected to the other of the hub 2 and the variable pitch bearing 3 through the second connecting part 21. In an optional example, the locking part 10 is connected to the hub 2 through the first connecting part 11, and the triggering part 20 is connected to the variable pitch bearing 3 through the second connecting part 21. When the yaw system of the wind turbine generator set is normally operated, the locking part 122 and the triggering part 20 can be separately arranged. When the yaw system fails, for example, the toothed belt 9 is broken, the blade 4 will be in a free state, so that one of the inner ring and the outer ring of the variable pitch bearing 3 is driven to rotate, so that the triggering piece 22 can be connected with the engaging piece 12 after the variable pitch bearing 3 rotates relative to the hub 2 by a predetermined angle, for example, the extension rod 221 and the clamping part 222 of the triggering piece 22 can be inserted into the inside of the engaging piece 12 and locked to the engaging piece 12, thereby locking the relative position between the blade 4 and the hub 2. Avoiding the blade 4 in a free state can bring secondary damage to the safety of the wind turbine generator set. The wind turbine generator set provided correspondingly can ensure the safety performance of the blade 4 when the variable pitch system fails, and has a higher safety protection level, because it comprises the safety protection device 1 provided by the above-mentioned embodiments.

[0073] Although the present application has been described with reference to the preferred embodiments, various modifications can be made to the present application and equivalents thereof without departing from the scope of the present application. In particular, the technical features mentioned in each embodiment can be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A safety protection device (1) for a wind turbine generator set, the wind turbine generator set comprising a hub (2) and blades (4) rotatably connected to the hub (2) via a pitch bearing (3), characterized in that, The safety protection device (1) includes: The locking component (10) includes a first connecting part (11) and a coupling part (12) connected to each other. The coupling part (12) includes a mounting bracket (121) and a locking part (122) connected to the mounting bracket (121). The first connecting part (11) is disposed on the mounting bracket (121) and is used to connect with one of the hub (2) and the pitch bearing (3). The triggering component (20) includes a second connecting part (21) and a triggering member (22) connected to each other. The second connecting part (21) is used to connect with the other of the hub (2) and the pitch bearing (3), such that one of the connecting member (12) and the triggering member (22) is configured to connect with the other of the connecting member (12) and the triggering member (22) after the blade (4) is in a free state and the blade drives the pitch bearing (3) to rotate relative to the hub (2) by a predetermined angle, so as to lock the relative position between the blade (4) and the hub (2). The trigger (22) is at least partially able to extend into the locking part (122) and is detachably connected to the locking part (122). The locking part (122) includes a pair of locking units (122a), each of which is at least partially able to move toward or away from each other to clamp or release the trigger (22). The locking unit (122a) includes locking blocks (1222) and an adjustment module (1221) connected to each other. The locking blocks (1222) arranged in pairs have locking holes (1223) on their sides facing each other, which are engaged with the trigger (22). The locking blocks (1222) are movably connected to the mounting bracket (121). The adjustment module (1221) is connected between the locking blocks (1222) and the mounting bracket (121) and drives the locking blocks (1222) to move relative to the mounting bracket (121) to clamp or release the trigger (22).

2. The safety protection device (1) according to claim 1, characterized in that, The adjustment module (1221) includes an adjustment rod (1221a) and an elastic element (1221b). One end of the adjustment rod (1221a) is connected to the locking block (1222) and the other end is connected to the mounting bracket (121). One end of the elastic element (1221b) abuts against the locking block (1222) and the other end abuts against the mounting bracket (121). An adjustment nut (1221c) is connected to the end of the adjustment rod (1221a) away from the locking block (1222). Alternatively, the adjustment module (1221) may include a telescopic cylinder, one of the cylinder body and the cylinder rod of which is connected to the locking block (1222) and the other is connected to the mounting bracket (121).

3. The safety protection device (1) according to claim 1, characterized in that, The mounting bracket (121) is provided with a guide rail, and each of the locking blocks (1222) is provided with a sliding groove that slides with the guide rail, and the locking block (1222) is slidably connected to the guide rail; And / or, the coupling (12) further includes an adapter (123), through which the side of each adjustment module (1221) facing away from the locking block (1222) is indirectly connected to the mounting bracket (121).

4. The safety protection device (1) according to claim 1, characterized in that, The mounting bracket (121) includes a locking bracket (121a) and an elastic bracket (121b). The locking bracket (121a) and the elastic bracket (121b) are connected to each other and together enclose a receiving cavity (121d). The locking part (122) is disposed in the receiving cavity (121d) and connected to the locking bracket (121a). The locking bracket (121a) is provided with a clearance hole (121c) that communicates with the receiving cavity (121d) and allows the trigger (22) to extend into it.

5. The safety protection device (1) according to claim 4, characterized in that, The first connecting part (11) includes a plurality of connecting holes (111) disposed on the locking bracket (121a), the plurality of connecting holes (111) being spaced apart and communicating with the receiving cavity (121d) respectively.

6. The safety protection device (1) according to any one of claims 1 to 5, characterized in that, The trigger (22) includes an extension rod (221) and a locking part (222). The extension rod (221) is connected between the second connecting part (21) and the locking part (222). The locking part (222) is at least partially protruding from the side wall of the extension rod (221). The locking part (222) can extend into the locking part (122) and is detachably connected to the locking part (122).

7. The safety protection device (1) according to claim 6, characterized in that, Along the extension direction of the extension rod (221), the cross-sectional size of the snap-fit ​​part (222) gradually decreases, and the cross-sectional size of the end of the snap-fit ​​part (222) connected to the extension rod (221) is greater than the cross-sectional size of the end of the snap-fit ​​part (222) away from the extension rod (221).

8. The safety protection device (1) according to any one of claims 1 to 5, characterized in that, The second connecting part (21) includes a connecting seat (212), the connecting seat (212) is provided with a plurality of connecting holes (211), and the trigger (22) is connected to the connecting seat (212).

9. The safety protection device (1) according to any one of claims 1 to 5, characterized in that, At least a portion of the connecting member (12) is an electromagnet, and at least a portion of the trigger member (22) is a magnetic adsorption member, wherein the electromagnet is capable of attracting and connecting with the magnetic adsorption member.

10. A wind turbine generator set, characterized in that, include: Wheel hub (2); Pitch bearing (3) is connected to the hub (2); The blade (4) is disposed on the pitch bearing (3) and rotatably connected to the hub (2) through the pitch bearing (3); In the safety protection device (1) as described in any one of claims 1 to 9, the locking member (10) is connected to one of the hub (2) and the pitch bearing (3) via the first connecting part (11), the triggering member (20) is connected to the other of the hub (2) and the pitch bearing (3) via the second connecting part (21), and one of the engaging member (12) and the triggering member (22) can be connected to the other of the engaging member (12) and the triggering member (22) after the pitch bearing (3) rotates relative to the hub (2) by a predetermined angle, so as to lock the relative position between the blade (4) and the hub (2).

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