Emergency device to prevent damage to a wind turbine generator
Patent Information
- Application Number
- DE202025103670
- Authority / Receiving Office
- DE · DE
- Patent Type
- Utility models
- Current Assignee / Owner
- Filing Date
- 2025-06-27
- Publication Date
- 2025-08-21
- Estimated Expiration
- 2035-06-30
Smart Images
Figure 00000000_0000_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present invention relates to the field of safety technology for wind turbines, in particular to an emergency device for preventing damage to a wind turbine generator. STATE OF THE ART
[0002] A wind turbine generator is an electrical system that converts wind energy into mechanical work, using this mechanical work to rotate the rotor and ultimately produce alternating current. The operating principle of a wind turbine generator set is relatively simple: the wind turbine rotates under the influence of wind power, converting the wind's kinetic energy into mechanical energy in the turbine shaft. The generator is rotated by the turbine shaft, thus generating electricity. In a broader sense, wind energy is also solar energy. Therefore, a wind turbine generator is essentially a thermoelectric generator that uses the sun as a heat source and the atmosphere as a working fluid.
[0003] However, in strong winds, the wind turbine may rotate too fast under the influence of wind force. At the generator cabin, the contact friction between the rotor and the generator stator can cause the bearing to rotate too fast, increasing the temperature inside the generator cabin. If the bearing remains in this rotating state for an extended period of time, it may cause excessive wear and tear, causing abnormal vibration and noise. This can not only affect the normal operation of the wind turbine generator but also disrupt the surrounding environment. CONTENT OF THE PRESENT INVENTION
[0004] In view of the problems existing in the above-mentioned prior art, the present invention is proposed.
[0005] Therefore, the technical problem to be solved by the present invention is: In strong winds, the wind turbine may rotate too fast under the influence of wind force. At the generator cabin, the contact friction between the rotor and the generator stator may cause the bearing to rotate too fast, thereby increasing the temperature in the generator cabin. If the bearing remains in this rotating state for a long time, it may cause excessive wear and tear on the bearing, causing abnormal vibration and noise, which may not only affect the normal operation of the wind turbine generator but also disturb the surrounding environment.
[0006] In order to solve the above-mentioned technical problem, the present invention provides the following technical solution: An emergency device for preventing damage to a wind power generator, comprising: a gear assembly, the gear assembly comprising a wind turbine, a sector-shaped rotating plate connected to the wind turbine, a connecting shaft cooperating with the sector-shaped rotating plate, and a speed sensor for detecting a speed of the wind turbine; a separating assembly, the separating assembly comprising a motor, a movable block connected to the motor, a limit table cooperating with the movable block, an arcuate abutment plate connected to the movable block, and a resilient connecting element connected to the connecting shaft; wherein the speed sensor controls a rotation direction of the motor depending on the detected speed, wherein, when the motor rotates in a first direction, the movable block is driven to move along the limit table toward the connecting shaft, and the arcuate abutment plate, under the action of the resilient connecting element, separates the sector-shaped rotary plate from the connecting shaft;wherein, when the motor rotates in a second direction, the movable block is driven to move along the limit table in a direction away from the connecting shaft, and the arcuate abutment plate connects the sector-shaped rotary plate to the connecting shaft under the action of the resilient connecting member;
[0007] In a preferred embodiment of the emergency device for preventing damage to a wind power generator according to the present invention, a first shaft and a second shaft are connected to the wind turbine, wherein the first shaft is fixedly connected to one end of the wind turbine, wherein the second shaft is fixedly connected to an end of the first shaft remote from the wind turbine; wherein the speed sensor is connected to the first shaft, and the sector-shaped rotary plate is connected to the second shaft.
[0008] In a preferred embodiment of the emergency device for preventing damage to a wind power generator according to the present invention, it is provided that a first spring and a detent plate are connected to the sector-shaped rotary plate, wherein one end of the first spring is fixedly connected to a peripheral surface of the second shaft and the other end of the first spring is fixedly connected to an inwardly recessed side of the sector-shaped rotary plate, wherein the detent plate is fixedly connected to an outwardly curved side of the sector-shaped rotary plate;wherein a chamber and a sector-shaped locking groove are provided on the connecting shaft, wherein the chamber is provided at one end of the connecting shaft, wherein an end of the second shaft remote from the first shaft is located in the chamber, wherein the sector-shaped locking groove is provided on a circumferential surface of the connecting shaft, wherein the sector-shaped locking groove is in communication with the chamber, wherein the locking plate is adapted to the sector-shaped locking groove; wherein when the first spring is returned, the locking plate engages in the sector-shaped locking groove, wherein the locking plate is released from the sector-shaped locking groove when the first spring is compressed.
[0009] In a preferred embodiment of the emergency device for preventing damage to a wind turbine generator according to the present invention, it is provided that an upper plate, a second spring, and a rectangular plate are connected to the arcuate abutment plate, wherein the upper plate is fixedly connected to an inner side of the arcuate abutment plate, wherein the upper plate is adapted to the sector-shaped locking groove, wherein one end of the second spring is fixedly connected to an outwardly curved side of the arcuate abutment plate and the other end of the second spring is fixedly connected to the rectangular plate, wherein one side of the rectangular plate is fixedly connected to the movable block; wherein, when the upper plate engages in the sector-shaped locking groove, the locking plate disengages from the sector-shaped locking groove; wherein, when the upper plate disengages from the sector-shaped locking groove, the locking plate engages in the sector-shaped locking groove.
[0010] In a preferred embodiment of the emergency device for preventing damage to a wind turbine generator according to the present invention, a first fastening rod is connected to the arcuate support plate, one end of the first fastening rod being firmly connected to the outwardly curved side of the arcuate support plate, and the other end of the first fastening rod being firmly connected to a stop rod; wherein the resilient connecting element comprises a second fastening rod, a third spring, and a triangular block, one end of the second fastening rod being firmly connected to the peripheral surface of the connecting shaft, one end of the third spring being firmly connected to the other end of the second fastening rod, the triangular block being firmly connected to the other end of the third spring, the stop rod interacting with an inclined surface of the triangular block;wherein one end of the stop rod near the connecting shaft forms a first contact point and the other end forms a second contact point; wherein one side of the triangular block near the connecting shaft forms a first ramp and the other side forms a second ramp; wherein, as the stop rod approaches or moves away from the connecting shaft, the first contact point touches the second ramp and the second contact point touches the first ramp.
[0011] In a preferred embodiment of the emergency device for preventing damage to a wind power generator according to the present invention, it is provided that two inclined surfaces of the triangular block are smooth planes, wherein a connecting point between the two inclined surfaces is a smooth curved surface.
[0012] In a preferred embodiment of the emergency device for preventing damage to a wind power generator according to the present invention, it is provided that an output end of the motor is fixedly connected to a bidirectional threaded spindle, wherein the movable block is screwed to the bidirectional threaded spindle, wherein the movable block is arranged symmetrically along a center line of the bidirectional threaded spindle.
[0013] In a preferred embodiment of the emergency device for preventing damage to a wind power generator according to the present invention, it is provided that a positioning rod and a sliding rod are connected to the movable block, wherein the arcuate abutment plate is connected to the positioning rod, wherein the positioning rod is fixedly connected to one side of the movable block and the sliding rod is fixedly connected to the other side of the movable block, wherein the sliding rod is slidably connected to the limit table.
[0014] The present invention has the following advantageous effects: The emergency device according to the invention for preventing damage to a wind turbine generator is equipped with a speed sensor. The speed sensor detects the speed of the wind turbine, and the direction of rotation of the motor is controlled depending on the speed. When the speed of the wind turbine reaches a preset nominal range, the motor can move the arcuate support plate toward the connecting shaft via the movable block, thereby breaking the connection between the sector-shaped rotating plate and the connecting shaft, allowing the wind turbine to rotate independently.This not only prevents the bearing from rotating and overheating due to excessive wind speed, which could cause damage, but also prevents the wind turbine from locking and damaging due to one-sided strong wind force, thus preventing abnormal wear and vibration of the bearing from disturbing the environment. At the same time, when the wind turbine returns to normal speed, the motor drives the arcuate abutment plate away from the connecting shaft, causing the wind turbine to rotate the connecting shaft, thus enabling better practicality.
[0015] Furthermore, the sector-shaped rotary plate is connected to the connecting shaft via the detent plate and the sector-shaped detent groove. With the elastic force generated when the first spring returns, the detent plate engages the sector-shaped detent groove, establishing the connection between the sector-shaped rotary plate and the connecting shaft. When the arcuate abutment plate approaches the connecting shaft and the second spring is compressed, the first spring is compressed by the elastic force of the second spring, causing the detent plate to disengage from the sector-shaped detent groove, the sector-shaped rotary plate is separated from the connecting shaft, and the upper plate engages the sector-shaped detent groove.However, when the arcuate contact plate moves away from the connecting shaft, the upper plate releases from the sector-shaped locking groove under the action of the second spring, and the locking plate re-engages with the sector-shaped locking groove under the action of the first spring, thereby establishing the connection or separation between the sector-shaped rotating plate and the connecting shaft, and thus the connection or separation between the wind turbine and the connecting shaft. This structural design allows the connection or separation between the wind turbine and the connecting shaft to be realized stably and reliably. SHORT DESCRIPTION OF THE DRAWING
[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to describe the embodiments are briefly presented below. Obviously, the drawings in the following description represent only some embodiments of the present invention. A person of ordinary skill in the art can also obtain further drawings based on these drawings without inventive effort. In the drawings: Fig. 1 is a schematic view showing the overall structure of an emergency device for preventing damage to a wind power generator according to an embodiment of the present invention; Fig. 2 is a schematic view showing the overall structure of the emergency damage prevention device for a wind power generator according to an embodiment of the present invention from another angle; Fig. Figure 3 shows an enlarged schematic view of the structure of section G of Fig. 1; Fig. Figure 4 shows an enlarged schematic view of the structure of section H of Fig. 2; and Fig. 5 shows a schematic view of the structure of a triangular block of the emergency damage prevention device for a wind power generator according to an embodiment of the present invention. DETAILED DESCRIPTION
[0017] In order to make the above-mentioned objects, features and advantages of the present invention more clearly understood, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
[0018] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, the present invention may be embodied in many ways other than as described herein. Those skilled in the art may make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.
[0019] The present invention will also be described in detail using schematic views. In the detailed description of the embodiments of the present invention, for convenience of explanation, a sectional view illustrating a device structure is partially enlarged, not to a general scale, and the schematic drawings are merely examples that are not intended to limit the scope of the present invention. Furthermore, the three-dimensional dimensions, namely length, width, and depth, should be considered in actual production.
[0020] Furthermore, as mentioned herein, "one embodiment" or "an embodiment" refers to a particular feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" that appears in various places throughout this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive from other embodiments. Example 1
[0021] With reference to Fig. 1 to 4, the present embodiment provides an emergency device for preventing damage to a wind turbine generator, comprising a gear assembly 100, wherein the gear assembly 100 comprises a wind turbine 101, a sector-shaped rotating plate 102 connected to the wind turbine 101, and a connecting shaft 103 cooperating with the sector-shaped rotating plate 102.
[0022] It should be noted that an end of the connecting shaft 103 remote from the wind turbine 101 is connected to the wind power generator.
[0023] Furthermore, a first shaft 101a and a second shaft 101b are connected to the wind turbine 101, wherein the first shaft 101a is fixedly connected to one end of the wind turbine 101, wherein the second shaft 101b is fixedly connected to an end of the first shaft 101a remote from the wind turbine 101.
[0024] It should be noted that a speed sensor is fixedly connected to a circumferential surface of the first shaft 101a.
[0025] Furthermore, a first spring 102a and a detent plate 102b are connected to the sector-shaped rotary plate 102, wherein one end of the first spring 102a is fixedly connected to a peripheral surface of the second shaft 101b and the other end of the first spring 102a is fixedly connected to an inwardly recessed side of the sector-shaped rotary plate 102, wherein the detent plate 102b is fixedly connected to an outwardly curved side of the sector-shaped rotary plate 102.
[0026] It should be noted that four sector-shaped rotary plates 102 are arranged in a ring shape along the circumferential surface of the second shaft 101b.
[0027] Furthermore, a chamber 103a and a sector-shaped locking groove 103b are provided on the connecting shaft 103, wherein the chamber 103a is provided at one end of the connecting shaft 103, wherein an end of the second shaft 101b remote from the first shaft 101a is rotatably connected to the chamber 103a, wherein the sector-shaped locking groove 103b is provided on a circumferential surface of the connecting shaft 103, wherein the sector-shaped locking groove 103b is in communication with the chamber 103a, wherein the locking plate 102b is adapted to the sector-shaped locking groove 103b.
[0028] During operation, when the second shaft 101b at one end of the wind turbine 101 rotates in the chamber 103a, the detent plate 102b rotates along the inner wall of the chamber 103a. At this point, the first spring 102a is compressed. When the detent plate 102b rotates to the position of the sector-shaped detent groove 103b, the first spring 102a is immediately reset, causing the detent plate 102b to engage the sector-shaped detent groove 103b, so that when the wind turbine 101 rotates, the connecting shaft 103 can be driven to rotate. Example 2
[0029] With reference to Fig. 1 to 5, the present embodiment provides an emergency device for preventing damage to a wind turbine, which includes a separation assembly 200, the separation assembly 200 including a motor 201, a movable block 202 connected to the motor 201, a limit table 203 cooperating with the movable block 202, an arcuate abutment plate 204 connected to the movable block 202, and a resilient connecting element 205 connected to the connecting shaft 103.
[0030] It should be noted that the speed sensor is in signal communication with the motor 201; wherein the motor 201 can be controlled to rotate forward when the speed sensor detects that the speed of the first shaft 101a exceeds a rated range; wherein the motor 201 can be controlled to rotate backward when the speed sensor detects that the speed of the first shaft 101a drops to the rated range.
[0031] In addition, both the engine 201 and the limit table 203 are mounted in the generator cabin.
[0032] Furthermore, an output end of the motor 201 is fixedly connected to a bidirectional lead screw 201a, wherein the movable block 202 is screwed to the bidirectional lead screw 201a, wherein the movable block 202 is arranged symmetrically along a center line of the bidirectional lead screw 201a.
[0033] Further, a positioning rod 202a and a sliding rod 202b are connected to the movable block 202, wherein the positioning rod 202a is fixedly connected to one side of the movable block 202 and the sliding rod 202b is fixedly connected to the other side of the movable block 202, wherein the sliding rod 202b is slidably connected to the limit table 203.
[0034] Furthermore, an upper plate 204a, a second spring 204b, a rectangular plate 204c and a first fastening rod 204d are connected to the arcuate abutment plate 204, wherein the upper plate 204a is fixedly connected to an inner side of the arcuate abutment plate 204, wherein the upper plate 204a is adapted to the sector-shaped locking groove 103b, wherein one end of the second spring 204b is fixedly connected to an outwardly curved side of the arcuate abutment plate 204 and the other end of the second spring 204b is fixedly connected to the rectangular plate 204c, wherein one side of the rectangular plate 204c is fixedly connected to the positioning rod 202a, wherein one end of the first fastening rod 204d is fixedly connected to the outwardly curved side of the arcuate abutment plate 204.
[0035] It should be noted that the elastic force of the second spring 204b is greater than that of the first spring 102a.
[0036] Furthermore, the other end of the first fixing rod 204d is fixedly connected to a stop rod 204d-1.
[0037] It should be stated that the structures in the Fig. 1 to 5 serve only as a reference for mechanical transfer and are not intended as schematic representations of the structural proportions of the final product.
[0038] Furthermore, the resilient connecting element 205 comprises a second fastening rod 205a, a third spring 205b and a triangular block 205c, wherein one end of the second fastening rod 205a is fixedly connected to the peripheral surface of the connecting shaft 103, wherein one end of the third spring 205b is fixedly connected to the other end of the second fastening rod 205a, wherein the triangular block 205c is fixedly connected to the other end of the third spring 205b, wherein the stop rod 204d-1 cooperates with an inclined surface of the triangular block 205c.
[0039] It should be noted that one end of the stop rod 204d-1 located near the connecting shaft 103 forms a first contact point 204d-1a and the other end forms a second contact point 204d-1b, wherein one side of the triangular block 205c located near the connecting shaft 103 forms a first ramp 205c-1 and the other side forms a second ramp 205c-2.
[0040] Preferably, two inclined surfaces of the triangular block 205c are smooth planes, wherein a connecting point between the two inclined surfaces is a smooth curved surface.
[0041] During operation, if the speed sensor detects that the speed of the first shaft 101a exceeds a rated range, the motor 201 can be controlled to rotate forward (rotate in the first direction), and the motor 201 can move the two arcuate abutment plates 204 toward the connecting shaft 103 via the movable block 202. When the first contact point 204d-1a touches the second ramp 205c-2, the third spring 205b is compressed; at this point, the second spring 204b is also in the compressed state. When the second contact point 204d-1b slides to the junction between the second ramp 205c-2 and the first ramp 205c-1, the second spring 204b and the third spring 205b are simultaneously reset.Now, the third spring 205b can exert a force on the triangular block 205c toward one side of the rectangular plate 204c, so that the first ramp 205c-1 exerts a thrust on the second contact point 204d-1b, thereby increasing the instantaneous elastic force of the arcuate abutment plate 204, causing the arcuate abutment plate 204 to contact the connecting shaft 103. Now, a certain deceleration of the connecting shaft 103 can occur without imparting excessive friction to the connecting shaft 103. When the sector-shaped locking groove 103b rotates to the position of the upper plate 204a, the upper plate 204a can immediately push out the locking plate 102b; now, the wind turbine 101 rotates independently. In this way, the effect of separating the wind turbine 101 from the connecting shaft 103 is achieved.This can not only prevent the bearing of the wind power generator from being rotated and overheated and thereby damaged due to excessive rotational speed of the wind turbine 101, but also prevent the wind turbine 101 from being blocked and thereby damaged due to one-sided strong wind force, thereby avoiding abnormal wear and abnormal vibration of the bearing from disturbing the surrounding environment.
[0042] When the speed sensor detects that the speed of the first shaft 101a drops to the rated range, the motor 201 can be controlled to rotate in reverse (in the second direction). Now, the movable block 202 can move the rectangular plate 204c to one side away from the connecting shaft 103, thereby gradually resetting the second spring 204b. When the second contact point 204d-1b slides along the first ramp 205c-1, the third spring 205b is compressed and the second spring 204b is extended. When the first contact point 204d-1a slides to the junction between the second ramp 205c-2 and the first ramp 205c-1, the third spring 205b and the second spring 204b are simultaneously reset.This allows the upper plate 204a to be immediately ejected from the sector-shaped locking groove 103b, preventing the wind turbine 101 and the connecting shaft 103 from getting stuck and thus increasing the risk of wind damage to the wind turbine 101. Thus, better practicality is achieved.
[0043] It is important to note that the configurations and arrangements of the present application shown in the several different exemplary embodiments are only exemplary. Although only a few embodiments have been described in detail in this disclosure, those reading this disclosure should readily understand that many modifications are possible, for example, changing the dimensions, scales, structures, shapes and proportions, as well as parameter values (e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientations, etc., of various elements, without materially departing from the novel teachings and advantages of the subject matter described in the present application. For example, an integrally formed element may be comprised of multiple parts or elements, wherein the position of the element may be reversed or otherwise varied.The type, number, or position of discrete elements may also be changed or varied. Therefore, all such modifications are intended to be within the scope of the present invention. The order or sequence of any operations or method steps may be varied or rearranged according to alternative embodiments. In the claims, all "devices plus functionality" clauses are intended to cover the structures described herein that perform the specified function, including not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes, and omissions may be made in the designs, operating conditions, and arrangements of the exemplary embodiments without departing from the scope of the present invention.Therefore, the present invention is not limited to a particular embodiment, but extends to several modifications that still fall within the scope of the appended claims.
[0044] In addition, in order to provide a concise and accurate description of the exemplary embodiments, not all features of an actual embodiment may be described (that is, those features that are not relevant to the best mode contemplated for carrying out the present invention or those features that are not relevant to the implementation of the present invention may not be described).
[0045] It is understood that in developing each actual embodiment, as with any engineering or design project, numerous decisions may be made for specific embodiments. Such development efforts can be complex and time-consuming. However, for those skilled in the art, having the benefit of the present disclosure, such development efforts are a common matter of design, manufacture, and production without requiring undue experimentation.
[0046] It should be noted that the above embodiments are merely illustrative of the technical solution of the present invention and do not constitute a limitation thereof. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions may be made to the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention. Such modifications or equivalent substitutions should be included within the scope of the claims of the present invention.
Claims
[1] Emergency device for preventing damage to a wind turbine generator, characterized by that it includes: a gear assembly (100), the gear assembly (100) comprising a wind turbine (101), a sector-shaped rotating plate (102) connected to the wind turbine (101), a connecting shaft (103) cooperating with the sector-shaped rotating plate (102), and a speed sensor for detecting a speed of the wind turbine (101); a separating assembly (200), the separating assembly (200) comprising a motor (201), a movable block (202) connected to the motor (201), a limiting table (203) cooperating with the movable block (202), an arcuate abutment plate (204) connected to the movable block (202), and a resilient connecting element (205) connected to the connecting shaft (103); the rotational speed sensor controlling a rotational direction of the motor (201) depending on the detected rotational speed, wherein, when the motor (201) rotates in a first direction, the movable block (202) is driven so that that it moves along the limit table (203) in the direction of the connecting shaft (103), and the arcuate abutment plate (204) separates the sector-shaped rotary plate (102) from the connecting shaft (103) under the action of the resilient connecting element (205); wherein, when the motor (201) rotates in a second direction, the movable block (202) is driven to move along the limit table (203) in a direction away from the connecting shaft (103), and the arcuate abutment plate (204) connects the sector-shaped rotary plate (102) to the connecting shaft (103) under the action of the resilient connecting element (205). [2] Emergency device for preventing damage to a wind power generator according to claim 1, characterized byin that a first shaft (101a) and a second shaft (101b) are connected to the wind turbine (101), wherein the first shaft (101a) is fixedly connected to one end of the wind turbine (101), wherein the second shaft (101b) is fixedly connected to an end of the first shaft (101a) remote from the wind turbine (101); wherein the speed sensor is connected to the first shaft (101a) and the sector-shaped rotary plate (102) is connected to the second shaft (101b). [3] Emergency device for preventing damage to a wind power generator according to claim 2, characterized bythat a first spring (102a) and a detent plate (102b) are connected to the sector-shaped rotary plate (102), one end of the first spring (102a) being fixedly connected to a peripheral surface of the second shaft (101b) and the other end of the first spring (102a) being fixedly connected to an inwardly recessed side of the sector-shaped rotary plate (102), the detent plate (102b) being fixedly connected to an outwardly curved side of the sector-shaped rotary plate (102);wherein a chamber (103a) and a sector-shaped locking groove (103b) are provided on the connecting shaft (103), wherein the chamber (103a) is provided at one end of the connecting shaft (103), wherein an end of the second shaft (101b) remote from the first shaft (101a) is located in the chamber (103a), wherein the sector-shaped locking groove (103b) is provided on a circumferential surface of the connecting shaft (103), wherein the sector-shaped locking groove (103b) is in communication with the chamber (103a), wherein the locking plate (102b) is adapted to the sector-shaped locking groove (103b); wherein when the first spring (102a) is returned, the locking plate (102b) engages in the sector-shaped locking groove (103b), wherein the locking plate (102b) is released from the sector-shaped locking groove (103b) when the first spring (102a) is compressed; [4] Emergency device for preventing damage to a wind power generator according to claim 3, characterized bythat an upper plate (204a), a second spring (204b) and a rectangular plate (204c) are connected to the arcuate support plate (204), wherein the upper plate (204a) is fixedly connected to an inner side of the arcuate support plate (204), wherein the upper plate (204a) is adapted to the sector-shaped locking groove (103b), wherein one end of the second spring (204b) is fixedly connected to an outwardly curved side of the arcuate support plate (204) and the other end of the second spring (204b) is fixedly connected to the rectangular plate (204c), wherein one side of the rectangular plate (204c) is fixedly connected to the movable block (202); wherein, when the upper plate (204a) engages in the sector-shaped locking groove (103b), the locking plate (102b) is released from the sector-shaped locking groove (103b); wherein, when the upper plate (204a) is released from the sector-shaped locking groove (103b), the locking plate (102b) engages in the sector-shaped locking groove (103b). [5] Emergency device for preventing damage to a wind turbine generator according to claim 4, characterized bythat a first fastening rod (204d) is connected to the arcuate support plate (204), one end of the first fastening rod (204d) being fixedly connected to the outwardly curved side of the arcuate support plate (204) and the other end of the first fastening rod (204d) being fixedly connected to a stop rod (204d-1); wherein the resilient connecting element (205) comprises a second fastening rod (205a), a third spring (205b) and a triangular block (205c), wherein one end of the second fastening rod (205a) is fixedly connected to the peripheral surface of the connecting shaft (103), wherein one end of the third spring (205b) is fixedly connected to the other end of the second fastening rod (205a), wherein the triangular block (205c) is fixedly connected to the other end of the third spring (205b), wherein the stop rod (204d-1) cooperates with two inclined surfaces of the triangular block (205c);wherein one end of the stop rod (204d-1) near the connecting shaft (103) forms a first contact point (204d-1a) and the other end forms a second contact point (204d-1b); wherein one side of the triangular block (205c) near the connecting shaft (103) forms a first ramp (205c-1) and the other side forms a second ramp (205c-2); wherein, when the stop rod (204d-1) approaches or moves away from the connecting shaft (103), the first contact point (204d-1a) touches the second ramp (205c-2) and the second contact point (204d-1b) touches the first ramp (205c-1); [6] Emergency device for preventing damage to a wind turbine generator according to claim 5, characterized by that the two inclined surfaces of the triangular block (205c) are smooth planes, wherein a connecting point between the two inclined surfaces is a smooth curved surface. [7] Emergency device for preventing damage to a wind power generator according to claim 1, characterized by that an output end of the motor (201) is fixedly connected to a bidirectional threaded spindle (201a), wherein the movable block (202) is screwed to the bidirectional threaded spindle (201a), wherein the movable block (202) is arranged symmetrically along a center line of the bidirectional threaded spindle (201a). [8] Emergency device for preventing damage to a wind turbine generator according to claim 1, characterized bythat a positioning rod (202a) and a sliding rod (202b) are connected to the movable block (202), wherein the arcuate abutment plate (204) is connected to the positioning rod (202a), wherein the positioning rod (202a) is fixedly connected to one side of the movable block (202) and the sliding rod (202b) is fixedly connected to the other side of the movable block (202), wherein the sliding rod (202b) is slidably connected to the limit table (203).