Emergency device for preventing damage to wind turbine

Abstract

An emergency device for preventing damage to a wind turbine, the device relating to the technical field of wind power generation safety. The device comprises: a transmission assembly (100), comprising a fan wheel (101), fan-shaped rotating plates (102) connected to the fan wheel, and a connecting shaft (103) cooperating with the fan-shaped rotating plates; and a disconnection assembly (200), comprising an electric motor (201), a moving block (202) connected to the electric motor, a limiting platform (203) cooperating with the moving block, an arc-shaped abutting plate (204) connected to the moving block, and an elastic connecting member (205) connected to the connecting shaft. The device can not only prevent overheating and damage caused by the fan wheel driving a bearing to rotate excessively fast, but also avoids locking the fan wheel, which would otherwise result in damage due to a large wind force on one side, thus the device has good practicability.

Description

An emergency device for preventing damage of a wind power generator TECHNICAL FIELD

[0001] The present application relates to the field of wind power generation safety technology, and particularly relates to an emergency device for preventing damage of a wind power generator. BACKGROUND

[0002] The wind power generator is a power device for converting wind energy into mechanical work, and the mechanical work drives the rotation of a rotor, and finally outputs alternating current. The working principle of the wind power generator set is relatively simple. The wind wheel rotates under the action of wind force, and converts the kinetic energy of wind into mechanical energy of the wind wheel shaft. The generator rotates under the driving of the wind wheel shaft to generate electricity. In a broad sense, wind energy is also solar energy, so the wind power generator can also be regarded as a heat energy utilization generator with the sun as a heat source and the atmosphere as a working medium.

[0003] However, when encountering gale weather, the wind wheel may rotate too fast due to the action of wind force. The bearing of the cabin part may rotate too fast due to the contact friction between the rotor and the stator of the generator, thereby causing the temperature in the cabin to rise. When being in this rotating state for a long time, the bearing may be abnormally worn, causing abnormal vibration and noise, which not only affects the normal operation of the wind power generator, but also may cause interference to the surrounding environment. SUMMARY

[0004] In view of the problems existing in the prior art, the present application is proposed.

[0005] Therefore, the technical problem to be solved by the present application is that when encountering gale weather, the wind wheel may rotate too fast due to the action of wind force. The bearing of the cabin part may rotate too fast due to the contact friction between the rotor and the stator of the generator, thereby causing the temperature in the cabin to rise. When being in this rotating state for a long time, the bearing may be abnormally worn, causing abnormal vibration and noise, which not only affects the normal operation of the wind power generator, but also may cause interference to the surrounding environment.

[0006] To solve the above technical problems, the present application provides the following technical scheme: an emergency device for preventing damage of a wind power generator, comprising:

[0007] A transmission assembly, the transmission assembly comprises a wind wheel, a fan-shaped rotating plate connected with the wind wheel, a connecting shaft matched with the fan-shaped rotating plate, and a rotating speed sensor for collecting the rotating speed of the wind wheel;

[0008] The disconnecting assembly comprises a motor, a moving block connected with the motor, a limiting table matched with the moving block, an arc-shaped abutting plate connected with the moving block, and an elastic connecting piece connected with the connecting shaft; the rotating speed sensor controls the rotating direction of the motor according to the collected rotating speed; when the motor rotates in the first direction, the moving block is driven to move along the limiting table towards the connecting shaft; the arc-shaped abutting plate makes the fan-shaped rotating plate disconnect with the connecting shaft under the action of the elastic connecting piece; when the motor rotates in the second direction, the moving block is driven to move along the limiting table away from the connecting shaft; the arc-shaped abutting plate makes the fan-shaped rotating plate connect with the connecting shaft under the action of the elastic connecting piece.

[0009] As a preferred scheme of the emergency device for preventing damage of the wind driven generator, the first shaft and the second shaft are connected to the wind wheel, the first shaft is fixedly connected to one end of the wind wheel, and the second shaft is fixedly connected to the end of the first shaft away from the wind wheel; the rotating speed sensor is connected to the first shaft, and the fan-shaped rotating plate is connected to the second shaft.

[0010] As a preferred scheme of the emergency device for preventing damage of the wind driven generator, the first spring and the clamping plate are connected to the fan-shaped rotating plate, one end of the first spring is fixedly connected to the circumferential surface of the second shaft, the other end of the first spring is fixedly connected to the inwardly recessed side of the fan-shaped rotating plate, and the clamping plate is fixedly connected to the outwardly protruding side of the fan-shaped rotating plate; the cavity and the fan-shaped clamping groove are formed in the connecting shaft, the cavity is formed in one end of the connecting shaft, the end of the second shaft away from the first shaft is located in the cavity, the fan-shaped clamping groove is formed in the circumferential surface of the connecting shaft, the fan-shaped clamping groove is communicated with the cavity, and the clamping plate is matched with the fan-shaped clamping groove; when the first spring is reset, the clamping plate is clamped in the fan-shaped clamping groove, and when the first spring is compressed, the clamping plate is separated from the fan-shaped clamping groove.

[0011] As a preferred scheme of the emergency device for preventing damage of the wind driven generator, the top plate, the second spring, and the rectangular plate are connected to the arc-shaped abutting plate, the top plate is fixedly connected to the inner side of the arc-shaped abutting plate, the top plate is matched with the fan-shaped clamping groove, one end of the second spring is fixedly connected to the outwardly protruding side of the arc-shaped abutting plate, the other end of the second spring is fixedly connected to the rectangular plate, and one side of the rectangular plate is fixedly connected to the moving block; when the top plate is clamped in the fan-shaped clamping groove, the clamping plate is separated from the fan-shaped clamping groove, and when the top plate is separated from the fan-shaped clamping groove, the clamping plate is clamped in the fan-shaped clamping groove.

[0012] As a preferred scheme of the emergency device for preventing damage of the wind driven generator, the arc-shaped abutting plate is connected with a first fixed rod, one end of the first fixed rod is fixedly connected with the outward protruding side of the arc-shaped abutting plate, and the other end of the first fixed rod is fixedly connected with a contact rod.

[0013] As a preferred scheme of the emergency device for preventing damage of the wind driven generator, the two inclined surfaces of the triangular block are smooth planes, and the connection between the two inclined surfaces is a smooth curved surface.

[0014] As a preferred scheme of the emergency device for preventing damage of the wind driven generator, the output end of the motor is fixedly connected with a bidirectional screw rod, the moving block is threadedly connected with the bidirectional screw rod, and the moving block is symmetrically arranged along the center line of the bidirectional screw rod.

[0015] As a preferred scheme of the emergency device for preventing damage of the wind driven generator, the moving block is connected with a positioning rod and a sliding rod, the arc-shaped abutting plate is connected with the positioning rod, the positioning rod is fixedly connected to one side of the moving block, the sliding rod is fixedly connected to the other side of the moving block, and the sliding rod is slidingly connected with the limiting table.

[0016] The present application has the following advantages:

[0017] The emergency device for preventing damage of the wind driven generator is provided with a rotating speed sensor, the rotating speed sensor is used for collecting the rotating speed of the wind wheel, the rotating direction of the fan is controlled according to the rotating speed, when the rotating speed of the wind wheel reaches a preset over-rating range, the motor can drive the arc-shaped abutting plate to move towards the connecting shaft through the moving block, so as to disconnect the connection between the fan-shaped rotating plate and the connecting shaft, and the wind wheel is self-rotated, which can prevent the situation that the wind wheel rotates too fast to cause the bearing to overheat and be damaged, and can also prevent the wind wheel from being locked, so that the wind wheel is damaged due to the large wind force on one side of the wind wheel, and the abnormal wear and vibration of the bearing do not interfere with the surrounding environment, and when the rotating speed of the wind wheel returns to normal, the motor drives the arc-shaped abutting plate to move away from the connecting shaft, so that the wind wheel drives the connecting shaft to rotate, which has good practicability.

[0018] Further, the fan-shaped rotating plate and the connecting shaft are connected through the snap-in plate and the fan-shaped snap-in slot, the snap-in plate is snapped into the fan-shaped snap-in slot by the elastic force of the first spring, the connection between the fan-shaped rotating plate and the connecting shaft is realized, when the arc-shaped abutting plate is close to the connecting shaft and the second spring is compressed, the elastic force of the second spring compresses the first spring, the snap-in plate is separated from the fan-shaped snap-in slot, the fan-shaped rotating plate and the connecting shaft are disconnected, and the top plate and the fan-shaped snap-in slot are snapped together; on the contrary, when the arc-shaped abutting plate is away from the connecting shaft, the top plate is separated from the fan-shaped snap-in slot under the action of the second spring, the snap-in plate is snapped together with the fan-shaped snap-in slot again under the action of the first spring, the connection and disconnection between the fan-shaped rotating plate and the connecting shaft are realized, and then the connection and disconnection between the wind wheel and the connecting shaft are realized. The structure can stably and reliably realize the connection and disconnection between the wind wheel and the connecting shaft. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the following embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort. Among them:

[0020] Fig. 1 is a schematic diagram of the overall structure of the emergency device for preventing damage of a wind power generator according to an embodiment of the present application;

[0021] Fig. 2 is a schematic diagram of the overall structure of the emergency device for preventing damage of a wind power generator according to another embodiment of the present application;

[0022] Fig. 3 is an enlarged schematic diagram of the structure at G in Fig. 1;

[0023] Fig. 4 is an enlarged schematic diagram of the structure at H in Fig. 2;

[0024] Fig. 5 is a schematic diagram of the triangular block structure in the emergency device for preventing damage of a wind power generator according to an embodiment of the present application. Embodiment of the present application

[0025] In order to make the above-mentioned purposes, features and advantages of the present application more apparent and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the drawings.

[0026] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application, but the present application can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without departing from the connotation of the present application, therefore the present application is not limited to the specific embodiments disclosed below.

[0027] Secondly, the application is described in detail in combination with the schematic diagram, in the detailed description of the embodiments of the application, for the convenience of description, the sectional view of the device structure will be partially enlarged without the general proportion, and the schematic diagram is only an example, which should not limit the scope of protection of the application here. In addition, the three-dimensional spatial dimensions of length, width and depth should be included in actual production.

[0028] Thirdly, the "one embodiment" or "embodiment" referred to herein means that the specific features, structures or characteristics can be included in at least one implementation of the application. "In one embodiment" appearing in different places in the specification does not mean the same embodiment, nor is it an embodiment that is independent of or selected from other embodiments.

[0029] Embodiment 1

[0030] Referring to FIGS. 1-4, the embodiment provides an emergency device for preventing damage of a wind power generator, which comprises a transmission assembly 100, the transmission assembly 100 comprising a wind wheel 101, a fan-shaped rotating plate 102 connected with the wind wheel 101, and a connecting shaft 103 matched with the fan-shaped rotating plate 102.

[0031] It should be noted that the end of the connecting shaft 103 away from the wind wheel 101 is connected with the wind power generator.

[0032] Further, the wind wheel 101 is connected with a first shaft rod 101a and a second shaft rod 101b, the first shaft rod 101a being fixedly connected to one end of the wind wheel 101, and the second shaft rod 101b being fixedly connected to the end of the first shaft rod 101a away from the wind wheel 101.

[0033] It should be noted that the circumferential surface of the first shaft rod 101a is fixedly connected with a rotating speed sensor.

[0034] Further, the fan-shaped rotating plate 102 is connected with a first spring 102a and a clamping plate 102b, one end of the first spring 102a being fixedly connected with the circumferential surface of the second shaft rod 101b, the other end of the first spring 102a being fixedly connected with the inwardly recessed side of the fan-shaped rotating plate 102, and the clamping plate 102b being fixedly connected to the outwardly protruding side of the fan-shaped rotating plate 102.

[0035] It should be noted that the fan-shaped rotating plate 102 is annularly arrayed with four along the circumferential surface of the second shaft rod 101b.

[0036] Further, the connecting shaft 103 is provided with a cavity 103a and a fan-shaped clamping groove 103b, the cavity 103a being provided at one end of the connecting shaft 103, the end of the second shaft rod 101b away from the first shaft rod 101a being rotatably connected with the cavity 103a, the fan-shaped clamping groove 103b being provided on the circumferential surface of the connecting shaft 103, the fan-shaped clamping groove 103b being communicated with the cavity 103a, and the clamping plate 102b being matched with the fan-shaped clamping groove 103b.

[0037] In use, when the second shaft 101b at one end of the wind wheel 101 rotates in the chamber 103a, the clamping plate 102b rotates along the inner wall of the chamber 103a, and at this time, the first spring 102a is in a compressed state. When the clamping plate 102b rotates to the position of the fan-shaped clamping slot 103b, the first spring 102a is instantaneously reset, so that the clamping plate 102b is clamped with the fan-shaped clamping slot 103b, thereby enabling the connecting shaft 103a to rotate when the wind wheel 101 rotates.

[0038] Embodiment 2

[0039] Referring to FIGS. 1-5, the embodiment provides an emergency device for preventing damage of a wind power generator, which comprises a disconnecting assembly 200, the disconnecting assembly 200 comprising a motor 201, a moving block 202 connected with the motor 201, a limiting table 203 matched with the moving block 202, an arc-shaped abutting plate 204 connected with the moving block 202, and a elastic connecting piece 205 connected with the connecting shaft 103.

[0040] It should be noted that the rotating speed sensor is in signal connection with the motor 201, and when the rotating speed sensor detects that the rotating speed of the first shaft 101a exceeds the rated range, the motor 201 can be controlled to rotate forward, and when the rotating speed sensor detects that the rotating speed of the first shaft 101a decreases to the rated range, the motor 201 can be controlled to rotate reversely.

[0041] In addition, the motor 201 and the limiting table 203 are both fixedly connected in the generator cabin.

[0042] Further, the output end of the motor 201 is fixedly connected with a bidirectional screw rod 201a, the moving block 202 is threadedly connected with the bidirectional screw rod 201a, and the moving block 202 is symmetrically arranged along the center line of the bidirectional screw rod 201a.

[0043] Further, the moving block 202 is connected with a positioning rod 202a and a sliding rod 202b, the positioning rod 202a is fixedly connected on one side of the moving block 202, the sliding rod 202b is fixedly connected on the other side of the moving block 202, and the sliding rod 202b is slidably connected with the limiting table 203.

[0044] Further, the arc-shaped abutting plate 204 is connected with a top plate 204a, a second spring 204b, a rectangular plate 204c and a first fixed rod 204d, the top plate 204a is fixedly connected on the inner side of the arc-shaped abutting plate 204, the top plate 204a is matched with the fan-shaped clamping slot 103b, one end of the second spring 204b is fixedly connected with the outward protruding side of the arc-shaped abutting plate 204, the other end of the second spring 204b is fixedly connected with the rectangular plate 204c, one side of the rectangular plate 204c is fixedly connected with the positioning rod 202a, and one end of the first fixed rod 204d is fixedly connected with the outward protruding side of the arc-shaped abutting plate 204.

[0045] It should be noted that the elastic force of the second spring 204b is greater than that of the first spring 102a.

[0046] Further, the other end of the first fixed rod 204d is fixedly connected with the abutting rod 204d-1.

[0047] It should be noted that the structures in FIGS. 1-5 are only used as a reference for mechanical transmission, and are not used as a schematic diagram of the structure proportion of the final product.

[0048] Further, the elastic connecting piece 205 comprises a second fixed rod 205a, a third spring 205b and a triangular block 205c, one end of the second fixed rod 205a is fixedly connected with the circumferential surface of the connecting shaft 103, one end of the third spring 205b is fixedly connected with the other end of the second fixed rod 205a, the triangular block 205c is fixedly connected with the other end of the third spring 205b, and the abutting rod 204d-1 is matched with the inclined surface of the triangular block 205c.

[0049] It should be noted that the end of the abutting rod 204d-1 close to the connecting shaft 103 is the first contact point 204d-1a, the other end is the second contact point 204d-1b, the side of the triangular block 205c close to the connecting shaft 103 is the first inclined surface 205c-1, and the other side is the second inclined surface 205c-2.

[0050] Preferably, the two inclined surfaces of the triangular block 205c are smooth planes, and the connection between the two inclined surfaces is a smooth curved surface.

[0051] In use, when the rotation speed sensor detects that the rotation speed of the first shaft 101a exceeds the rated range, the motor 201 can be controlled to rotate in the forward direction (rotate in the first direction), and the motor 201 can drive the two arc-shaped abutting plates 204 to move closer to the connecting shaft 103 through the moving block 202. When the first contact point 204d-1a contacts the second slope 205c-2, the third spring 205b is compressed, and at this time, the second spring 204b is also in a compressed state. When the second contact point 204d-1b slides to the connection between the second slope 205c-2 and the first slope 205c-1, the second spring 204b and the third spring 205b are simultaneously reset at this time. The third spring 205b can exert a force to the side of the rectangular plate 204c on the triangular block 205c, so that the first slope 205c-1 exerts a pushing force on the second contact point 204d-1b, thereby increasing the instantaneous elastic force of the arc-shaped abutting plate 204. When the arc-shaped abutting plate 204 contacts the connecting shaft 103, it can achieve a certain speed reduction effect on the connecting shaft 103, but will not give the connecting shaft 103 too much friction. When the fan-shaped clamping groove 103b rotates to the position of the top plate 204a, the top plate 204a can instantly pop out the clamping plate 102b. At this time, the wind wheel 101 rotates, achieving the effect of disconnecting the wind wheel 101 and the connecting shaft 103. It can prevent the wind wheel 101 from rotating too fast to drive the wind turbine bearing to rotate and overheat, and can also prevent the wind wheel 101 from being locked, avoiding the problem of damage to the wind wheel due to the large wind force on one side. At the same time, it can also avoid the interference of abnormal bearing wear and vibration to the surrounding environment.

[0052] When the rotation speed sensor detects that the rotation speed of the first shaft 101a decreases to the rated range, the motor 201 can be controlled to rotate in the reverse direction (rotate in the second direction). At this time, the moving block 202 can drive the rectangular plate 204c to move away from the connecting shaft 103, and at this time, the second spring 204b is gradually reset. When the second contact point 204d-1b slides along the first slope 205c-1, the third spring 205b is compressed, and at this time, the second spring 204b is stretched. When the first contact point 204d-1a slides to the connection between the second slope 205c-2 and the first slope 205c-1, the third spring 205b and the second spring 204b are simultaneously reset, which can instantly pop the top plate 204a out of the fan-shaped clamping groove 103b. This can avoid the risk of damage to the wind wheel 101 caused by the wind wheel 101 and the connecting shaft 103 being stuck, and has better practicality.

[0053] It is important to note that the construction and arrangement of the application shown in the various exemplary embodiments is illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review the present disclosure will readily appreciate that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters, mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter described herein. For example, elements shown as integrally formed can be constructed of multiple parts or elements, the position of elements can be reversed or otherwise varied, and the nature or number of elements or positions can be altered or varied. Thus, the foregoing description is by way of example only, and is not intended to be limiting. The application is limited only as defined in the following claims and equivalents thereto. The sequence of any process or method steps, or the order in which they are carried out, can be altered or re-ordered without departing from the scope of the application. Any "articles of manufacture" or "manufacturing" as described herein are intended to encompass structures constructed of a multitude of different physical elements or components. In the claims, any means-plus-function clause is intended to cover the structures described herein as performing the recited function and also cover structures yet to be invented which perform the recited function but operate in a different manner. Other substitutions, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the application as expressed in the appended claims.

[0054] Also, to provide a concise description of the exemplary embodiments, not all features of an actual implementation can be described (that is, not all implementations can include all of the features described or optional implementations can include only a subset of the features described).

[0055] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions can be made. Such development efforts can inevitably lead to modifications, not all of which can be foreseen in advance. Such modifications are not to be regarded as a departure from the spirit and scope of the present application, and all such modifications are intended to be included within the scope of the present application. The disclosure is not a complete description of the actual implementation, nor is it intended to be so; thus, what is actually devised can depart from what is described in this disclosure.

[0056] It should be noted that the above examples are merely intended to illustrate the technical solutions of the present application but not to limit the present application, and although the present application is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the present application, and all such modifications or replacements should be included in the scope of the claims of the present application.

Claims

1. An emergency device for preventing damage to a wind power generator, characterized in that: Include: Transmission assembly (100), the transmission assembly (100) includes wind wheel (101), fan-shaped rotating plate (102) connected with the wind wheel (101), connecting shaft (103) matched with the fan-shaped rotating plate (102) and the rotating speed sensor for collecting the rotating speed of wind wheel (101); The disconnecting assembly (200) includes a motor (201), a moving block (202) connected with the motor (201), a limiting table (203) matched with the moving block (202), an arc-shaped abutment plate (204) connected with the moving block (202) and a elastic connecting piece (205) connected with the connecting shaft (103);The rotating direction of the motor (201) is controlled according to the rotating speed collected by the rotating speed sensor, when the motor (201) rotates to the first direction, the moving block (202) is driven to move along the limiting table (203) to the direction close to the connecting shaft (103), the arc-shaped abutment plate (204) is disconnected with the connecting shaft (103) under the action of the elastic connecting piece (205);When the motor (201) rotates to the second direction, the moving block (202) is driven to move along the limiting table (203) to the direction away from the connecting shaft (103), and the arc-shaped abutment plate (204) is connected with the connecting shaft (103) under the action of the elastic connecting piece (205).

2. A wind turbine damage prevention emergency apparatus according to claim 1, characterised in that: The wind wheel (101) is connected with the first shaft (101a) and the second shaft (101b), the first shaft (101a) is fixedly connected with one end of the wind wheel (101), and the second shaft (101b) is fixedly connected with the end away from the wind wheel (101) of the first shaft (101a);The rotating speed sensor is connected on the first shaft (101a), and the fan-shaped rotating plate (102) is connected with the second shaft (101b).

3. A wind turbine damage prevention emergency apparatus according to claim 2, characterised in that: The fan-shaped rotating plate (102) is connected with a first spring (102a) and a clamping plate (102b), one end of the first spring (102a) is fixedly connected with the circumferential surface of the second shaft rod (101b), the other end of the first spring (102a) is fixedly connected with the inwardly recessed side of the fan-shaped rotating plate (102), and the clamping plate (102b) is fixedly connected with the outwardly protruded side of the fan-shaped rotating plate (102); the connecting shaft (103) is provided with a cavity (103a) and a fan-shaped clamping groove (103b), the cavity (103a) is arranged at one end of the connecting shaft (103), the second shaft rod (101b) is located in the cavity (103a) away from the first shaft rod (101a), the fan-shaped clamping groove (103b) is arranged on the circumferential surface of the connecting shaft (103), the fan-shaped clamping groove (103b) is communicated with the cavity (103a), and the clamping plate (102b) is matched with the fan-shaped clamping groove (103b); when the first spring (102a) is reset, the clamping plate (102b) is clamped with the fan-shaped clamping groove (103b), when the first spring (102a) is compressed, the clamping plate (102b) is separated from the fan-shaped clamping groove (103b).

4. A wind turbine damage prevention emergency apparatus according to claim 3, characterised in that: The arc-shaped abutting plate (204) is connected with a top plate (204a), a second spring (204b) and a rectangular plate (204c), the top plate (204a) is fixedly connected with the inner side of the arc-shaped abutting plate (204), the top plate (204a) is matched with the fan-shaped clamping groove (103b), one end of the second spring (204b) is fixedly connected with the outwardly protruded side of the arc-shaped abutting plate (204), the other end of the second spring (204b) is fixedly connected with the rectangular plate (204c), and one side of the rectangular plate (204c) is fixedly connected with the moving block (202); when the top plate (204a) is clamped into the fan-shaped clamping groove (103b), the clamping plate (102b) is separated from the fan-shaped clamping groove (103b); when the top plate (204a) is separated from the fan-shaped clamping groove (103b), the clamping plate (102b) is clamped with the fan-shaped clamping groove (103b).

5. A wind turbine damage prevention emergency apparatus according to claim 4, characterised in that: The arc-shaped abutting plate (204) is connected with a first fixed rod (204d), one end of the first fixed rod (204d) is fixedly connected with the outward protruding side of the arc-shaped abutting plate (204), and the other end of the first fixed rod (204d) is fixedly connected with a contact rod (204d-1); the elastic connecting piece (205) comprises a second fixed rod (205a), a third spring (205b) and a triangular block (205c), one end of the second fixed rod (205a) is fixedly connected with the circumferential surface of the connecting shaft (103), one end of the third spring (205b) is fixedly connected with the other end of the second fixed rod (205a), and the other end of the third spring (205b) is fixedly connected with the triangular block (205c), the contact rod (204d-1) is matched with two inclined surfaces of the triangular block (205c); one end of the contact rod (204d-1) close to the connecting shaft (103) is a first contact point (204d-1a), and the other end thereof is a second contact point (204d-1b); one side of the triangular block (205c) close to the connecting shaft (103) is a first inclined surface (205c-1), and the other side thereof is a second inclined surface (205c-2); in the process that the contact rod (204d-1) approaches or moves away from the connecting shaft (103), the first contact point (204d-1a) contacts the second inclined surface (205c-2), and the second contact point (204d-1b) contacts the first inclined surface (205c-1).

6. A wind turbine damage prevention emergency apparatus according to claim 5, characterised in that: The two inclined surfaces of the triangular block (205c) are smooth planes, and the connection between the two inclined surfaces is a smooth curved surface.

7. The emergency apparatus for preventing damage of a wind power generator according to claim 1, characterized in that: The output end of the motor (201) is fixedly connected with a bidirectional screw rod (201a), the moving block (202) is threadedly connected with the bidirectional screw rod (201a), and the moving block (202) is symmetrically arranged along the center line of the bidirectional screw rod (201a).

8. The emergency apparatus for preventing damage of a wind power generator according to claim 1, characterized in that: The moving block (202) is connected with a positioning rod (202a) and a sliding rod (202b), the arc-shaped abutting plate (204) is connected with the positioning rod (202a), the positioning rod (202a) is fixedly connected to one side of the moving block (202), the sliding rod (202b) is fixedly connected to the other side of the moving block (202), and the sliding rod (202b) is slidably connected with the limiting table (203).

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