Wind generating set yaw device with vibration protection mechanism

Abstract

The invention provides a wind generating set yawing device with a vibration protection mechanism, which comprises a fixed seat, a rotating seat and a buffer assembly arranged between the fixed seat and the rotating seat, a first cavity and a second cavity are formed in the buffer assembly, and a circulating medium is arranged in the first cavity and the second cavity. A circulation channel for communicating the first cavity with the second cavity is arranged between the first cavity and the second cavity, the first cavity comprises a first left sub-cavity and a first right sub-cavity, the second cavity comprises a second left sub-cavity and a second right sub-cavity, and a buffer cavity is arranged between the second left sub-cavity and the second right sub-cavity; the first left branch cavity is communicated with the second left branch cavity, and the first right branch cavity is communicated with the second right branch cavity. The circulation channel is arranged in the buffer cavity, a blocking piece is arranged in the buffer cavity, and when the pressure of one of the second left branch cavity and the second right branch cavity is larger than a preset threshold value, the circulation medium extrudes the blocking piece to deform. Vibration between the yaw gear ring and the yaw bearing is absorbed and supported, and the stability of the wind turbine generator is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power generation equipment, and particularly relates to a yaw device of a wind turbine generator set with a vibration protection mechanism. Background Art

[0002] The yaw drive system is an important part of a wind turbine generator set. Its main function is to control the impact of wind speed on the wind turbine generator set by automatically adjusting the blade angle under extreme wind speed conditions, preventing the equipment from being damaged due to overload. And through the yaw control of the wind turbine generator, the noise during the operation of the fan can be reduced, and the impact on the surrounding environment can be minimized. During the operation of the wind turbine generator set, the yaw system can ensure that the wind turbine generator does not topple or lose balance when the wind speed changes, ensuring the stable operation of the entire system.

[0003] In the prior art, during the operation of the yaw system of a wind turbine generator set, there are generally problems such as yaw vibration, noise; yaw sliding pads falling off and cracking; excessive wear of yaw brake pads and brake discs. These problems not only cause premature failure of the components of the wind turbine generator set, increase the maintenance cost and power generation loss of the wind turbine generator set, but also cause noise nuisance to the villagers near the unit, as well as bolt loosening and damage to other components caused by vibration.

[0004] Since the yaw system is affected by wind force changes, its start-stop actions are frequent, and abnormal vibration and noise are likely to occur during the process. There are mainly the following reasons. First, the unstable resistance torque during yaw is one of the main reasons for vibration. When the self-excitation frequency of the components of the yaw system approaches the frequencies of several natural vibration modes of the tower, resonance is likely to occur, thus exacerbating the vibration.

[0005] In addition, another main reason is frictional vibration. Since the yaw sliding pad bears all the loads and weights of the nacelle and slides on the surface of the yaw gear ring, the sliding pad should have a high bearing capacity and a stable friction coefficient. Since the static friction coefficient of the material is always higher than the dynamic friction coefficient, especially in the case of low-speed heavy loads, the vibration and noise are more significant, easily causing loosening of the connecting parts and environmental pollution caused by strong noise. Summary of the Invention

[0006] In view of this, the present invention aims to provide a yaw device of a wind turbine generator set with a vibration protection mechanism, so as to effectively reduce the vibration and noise of the yaw system and improve the stability of the yaw system operation.

[0007] To achieve the above object, the technical solution of the present invention is realized as follows:

[0008] A yaw device of a wind turbine generator set with a vibration protection mechanism, characterized in that:

[0009] It includes a fixed seat connected to the yaw gear ring, a rotating seat connected below the yaw bearing, and a buffer assembly provided between the fixed seat and the rotating seat;

[0010] A first chamber and a second chamber are formed inside the buffer assembly at intervals inside and outside. A circulating medium is provided in the first chamber and the second chamber;

[0011] A circulation channel communicating the two is provided between the first chamber and the second chamber. The first chamber includes a first left sub-chamber and a first right sub-chamber. The second chamber includes a second left sub-chamber and a second right sub-chamber. A buffer chamber is further provided between the second left sub-chamber and the second right sub-chamber;

[0012] The first left sub-chamber, the second left sub-chamber, the first right sub-chamber and the second right sub-chamber are all communicated with the buffer chamber;

[0013] The circulation channel is provided in the buffer chamber. A blocking member is further provided in the buffer chamber. When the pressure in either the second left sub-chamber or the second right sub-chamber is greater than a preset threshold value, the circulating medium squeezes the blocking member to deform, so that the second left sub-chamber and the second right sub-chamber are communicated.

[0014] Furthermore, the buffer assembly is made of a rubber part. The buffer assembly includes an inner ring body and an outer ring body arranged layer by layer from the inside out;

[0015] The first chamber is formed inside the inner ring body. The second chamber and the buffer chamber are both formed on the circumference of the inner ring body. The inner hole of the outer ring body abuts against the outer circumference of the inner ring body, so that the second chamber and the buffer chamber form a sealed cavity.

[0016] Furthermore, the first chamber includes at least two chamber pipes. An annular chamber is formed inside the inner ring body. A plurality of the chamber pipes are arranged at intervals in the height direction of the inner ring body in the annular chamber; a vertical pipe is provided between the plurality of chamber pipes. The vertical pipe is communicated with the inner cavity of each chamber pipe;

[0017] A liquid inlet communicated with the vertical pipe is provided on the inner ring body.

[0018] Furthermore, the outer ring body includes a main body covering the outside of the inner ring body, and blocking plates provided on both sides of the main body. The blocking plates abut against the upper and lower ends of the inner ring body.

[0019] Furthermore, the circulation channel includes a number of first liquid flow holes communicated with the chamber pipes. The first liquid flow holes penetrate the inner ring body. The first liquid flow holes communicate the chamber pipes with the buffer chamber.

[0020] Further, a convex column extending towards the center is provided on the inner side of the inner ring body, and the liquid inlet is formed on the convex column;

[0021] A U-shaped groove is provided on the rotating seat, and the convex column is clamped in the U-shaped groove.

[0022] Further, guide members connected to both sides of the plugging member are also provided in the buffer cavity, and the guide members extend from the bottom of the buffer cavity towards the connection between the plugging member and the main body;

[0023] The guide member is in an arc shape arched towards the outside.

[0024] Further, the second left sub-cavity, and / or, the second right sub-cavity includes a U-shaped section and a straight section arranged in a curved manner;

[0025] The inner ring body is also provided with second liquid flow holes communicating with the first chamber, and the two second liquid flow holes are respectively arranged at the ends of the U-shaped section.

[0026] Further, a vertical section communicating the two is provided in the straight sections of the second left sub-cavity and the second right sub-cavity;

[0027] The vertical section is arranged on the opposite side of the buffer cavity.

[0028] Further, a plurality of inwardly recessed long grooves are formed on the outer wall of the inner ring body, and the plurality of long grooves are communicated through an air flow channel, and the inner ring body is provided with air outlet holes communicating the long grooves with the first chamber.

[0029] Compared with the prior art, the present invention has the following advantages:

[0030] For the yaw device of the wind turbine generator with a vibration protection mechanism of the present invention, by providing a fixed seat on the yaw gear ring, a rotating seat on the yaw bearing, and a buffer assembly between the fixed seat and the rotating seat, when the yaw system vibrates, by injecting a circulating medium into the first chamber and the second chamber of the buffer assembly, it abuts between the fixed seat and the rotating seat. During low-frequency vibration, the first left sub-cavity communicates with the second left sub-cavity to form a buffer for the left half, and the first right sub-cavity communicates with the second right sub-cavity to form a buffer for the right half. Such a setting can fully absorb energy and prevent vibration transmission. When the pressure in the second left sub-cavity or the second right sub-cavity is greater than a preset threshold, the circulating medium squeezes the plugging member to deform, thereby communicating the second left sub-cavity and the second right sub-cavity, making the first chamber communicate with the second chamber, realizing the pressure balance in the buffer assembly, thereby playing a role in absorbing and supporting the vibration between the yaw gear ring and the yaw bearing, avoiding damage to components caused by vibration, and improving the stability of the wind turbine generator.

[0031] In addition, by setting the buffer component to be made of rubber, it is convenient to realize the expansion and deformation of the first chamber and the second chamber through its elastic characteristics, and by setting the inner ring body and the outer ring body to be connected inside and outside, it is convenient for processing and forming.

[0032] In addition, by setting at least two cavity tubes and the vertical tubes connecting the cavity tubes, the flowing medium enters the cavity tubes and the vertical tubes for filling, increasing the deformation ability and flexibility of the first chamber, and by setting a liquid inlet on the inner ring body, it is convenient for the transportation of the flowing medium. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0034] Figure 1 is a three-dimensional schematic diagram of a yaw device of a wind turbine generator with a vibration protection mechanism according to an embodiment of the present invention;

[0035] Figure 2 is a top view schematic diagram of a yaw device of a wind turbine generator with a vibration protection mechanism according to an embodiment of the present invention;

[0036] Figure 3 is Figure 2 a cross-sectional schematic diagram at A-A in

[0037] Figure 4 is a three-dimensional schematic diagram of the buffer component from the first perspective according to an embodiment of the present invention;

[0038] Figure 5 is a three-dimensional schematic diagram of the buffer component from the second perspective according to an embodiment of the present invention;

[0039] Figure 6 is a three-dimensional schematic diagram of the buffer component from the third perspective according to an embodiment of the present invention;

[0040] Figure 7 is a top view schematic diagram of the inner ring body according to an embodiment of the present invention;

[0041] Figure 8 is Figure 7 a cross-sectional schematic diagram at B-B in

[0042] Figure 9 is a three-dimensional schematic diagram of the buffer component from the fourth perspective according to an embodiment of the present invention;

[0043] Figure 10 is Figure 9 a partial enlarged view at I in

[0044] Figure 11 is Figure 5Partial enlarged view at II in the middle.

[0045] Explanation of reference numerals in the drawings:

[0046] 1. Yaw gear ring; 2. Fixed seat; 3. Yaw bearing; 4. Rotating seat; 5. Buffer assembly; 6. Convex post

[0047] 501. First chamber; 502. Second chamber; 503. Flow passage; 504. Second left sub-chamber; 505. Second right sub-chamber; 506. Buffer chamber; 507. Plugging member; 508. Inner ring body; 509. Outer ring body; 510. Guide member

[0048] 401. U-shaped groove

[0049] 5011. Chamber tube; 5012. Vertical tube

[0050] 5021. U-shaped section; 5022. Straight section; 5023. Vertical section; 5024. Left communication groove; 5025. Right communication groove

[0051] 5081. Annular chamber; 5082. Liquid inlet; 5083. Second liquid flow hole

[0052] 5091. Body; 5092. Plugging plate Detailed implementation manners

[0053] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0054] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "back", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0055] In addition, in the description of the present invention, unless otherwise clearly defined, the terms "installation", "connection", "connection", "connection member" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in combination with specific situations.

[0056] The present invention will be described in detail below with reference to the drawings and in combination with embodiments.

[0057] This embodiment relates to a yaw device of a wind turbine with a vibration protection mechanism. Generally, as Figures 1 to 3 shown, the yaw device includes a fixed seat 2 connected to the yaw gear ring 1, a rotating seat 4 connected below the yaw bearing 3, and a buffer assembly 5 disposed between the fixed seat 2 and the rotating seat 4. A first chamber 501 and a second chamber 502 are formed inside the buffer assembly 5 at intervals inside and outside. A circulation medium is provided in the first chamber 501 and the second chamber 502.

[0058] Among them, a circulation channel 503 connecting the two is provided between the first chamber 501 and the second chamber 502. The first chamber 501 includes a first left sub-chamber and a first right sub-chamber. The second chamber 502 includes a second left sub-chamber 504 and a second right sub-chamber 505. A buffer chamber 506 is further provided between the second left sub-chamber 504 and the second right sub-chamber 505. The first left sub-chamber communicates with the second left sub-chamber 504, and the first right sub-chamber communicates with the second right sub-chamber 505. The circulation channel 503 is disposed inside the buffer chamber 506. A blocking member 507 is further provided inside the buffer chamber 506. When the pressure in either the second left sub-chamber 504 or the second right sub-chamber 505 is greater than a preset threshold value, the circulation medium squeezes the blocking member 507 to deform, so that the second left sub-chamber 504 and the second right sub-chamber 505 communicate.

[0059] According to the above settings, for the yaw device of the wind turbine with a vibration protection mechanism in this embodiment, by setting a fixed seat 2 on the yaw gear ring 1, a rotating seat 4 on the yaw bearing 3, and a buffer assembly 5 between the fixed seat 2 and the rotating seat 4, when the yaw system vibrates, by injecting a circulation medium into the first chamber 501 and the second chamber 502 of the buffer assembly 5, making it abut between the fixed seat 2 and the rotating seat 4. During low-frequency vibration, the first left sub-chamber communicates with the second left sub-chamber 504 to form a buffer for the left half, and the first right sub-chamber communicates with the second right sub-chamber 505 to form a buffer for the right half. Such a setting can fully absorb energy and prevent vibration transmission. When the pressure in the second left sub-chamber 504 or the second right sub-chamber 505 is greater than the preset threshold value, the circulation medium squeezes the blocking member 507 to deform, thereby connecting the second left sub-chamber 504 and the second right sub-chamber 505, making the first chamber 501 communicate with the second chamber 502, realizing the pressure balance inside the buffer assembly 5, thereby playing a role in absorbing and supporting the vibration between the yaw gear ring 1 and the yaw bearing 3, avoiding damage to components caused by vibration, and improving the stability of the wind turbine.

[0060] Based on the above overall introduction, an exemplary structure of the yaw device of the wind turbine with a vibration protection mechanism in this embodiment is as Figures 1 to 3As shown, both the fixed seat 2 and the rotating seat 4 are annular cylinders, and are fixed on the yaw gear ring 1 by bolts. The upper end of the fixed seat 2 is provided with a convex ring protruding inwards, and the height of the convex ring is the same as the height of the rotating and buffering assembly 5.

[0061] As a preferred embodiment, the buffering assembly 5 is made of a rubber part, such as Figures 3 to 4 shown, the buffering assembly 5 includes an inner ring body 508 and an outer ring body 509 arranged layer by layer from inside to outside. The first chamber 501 is formed inside the inner ring body 508, and the second chamber 502 and the buffering chamber 506 are both formed on the circumference of the inner ring body 508. The inner hole of the outer ring body 509 abuts against the outer circumference of the inner ring body 508, so that the second chamber 502 and the buffering chamber 506 form a sealed cavity.

[0062] Preferably, both the inner ring body 508 and the outer ring body 509 are formed by injection molding. After the inner ring body 508 and the outer ring body 509 are separately formed, they are fixedly connected by bonding, or the two can be integrally injection molded. In this embodiment, by setting the buffering assembly 5 to be made of rubber material, it is convenient to realize the expansion deformation of the first chamber 501 and the second chamber 502 through its elastic characteristics, and by setting the inner ring body 508 and the outer ring body 509 to be connected inside and outside, it is convenient for processing and forming.

[0063] such as Figures 7 to 8 shown, the first chamber 501 includes at least two chamber tubes 5011. An annular chamber 5081 is formed in the inner ring body 508, and a plurality of chamber tubes 5011 are arranged at intervals in the annular chamber 5081 along the height direction of the inner ring body 508; a vertical tube 5012 is arranged between the plurality of chamber tubes 5011, and the vertical tube 5012 is communicated with the inner cavity of each chamber tube 5011. The inner ring body 508 is provided with a liquid inlet 5082 communicated with the vertical tube 5012. By setting at least two chamber tubes 5011 and the vertical tube 5012 connecting the chamber tubes 5011, the circulation medium enters the chamber tubes 5011 and the vertical tube 5012 for filling, increasing the deformation ability and flexibility of the first chamber 501, and facilitating the transportation of the circulation medium by setting the liquid inlet 5082 on the inner ring body 508.

[0064] In addition, in order to ensure the sealing performance of the second chamber 502, as Figure 3 and Figure 4 shown, the outer ring body 509 includes a main body 5091 covering the outside of the inner ring body 508, and plug plates 5092 arranged on both sides of the main body 5091. The plug plates 5092 abut against the upper and lower ends of the inner ring body 508.

[0065] Further, the circulation channel 503 includes a plurality of first liquid flow holes communicating with the cavity tube 5011. The first liquid flow holes penetrate through the inner ring body 508 and connect the cavity tube 5011 with the buffer cavity 506. By providing the first liquid flow holes, the liquid in the first chamber 501 is drained into the buffer cavity 506. Due to the effect of the plugging member 507, the buffer cavity 506 is divided by the plugging member 507 so that the second left sub-cavity 504 and the second right sub-cavity 505 are not connected. When the pressure in one of the sub-cavities exceeds the preset threshold, the plugging member 507 is squeezed and tilted towards the other sub-cavity, enabling the second left sub-cavity 504 and the second right sub-cavity 505 to communicate. Furthermore, the first chamber 501 and the second chamber 502 are connected to achieve pressure balance between the two, effectively absorbing the vibration energy of the yaw gear ring 1 and the yaw bearing 3 and increasing the stability of the yaw system.

[0066] For ease of setting, as Figures 3 to 6 shown, a convex post 6 extending towards its center is further provided inside the inner ring body 508. The liquid inlet 5082 is formed on the convex post 6. A U-shaped groove 401 is provided on the rotating seat 4, and the convex post 6 is clamped in the U-shaped groove 401. And as Figure 3 shown, the convex post 6 can be set as a stud with an external thread, and the convex post 6 is locked with the rotating seat 4 through a nut and a gasket. When the yaw system rotates, the buffer assembly 5 rotates with the rotating seat 4. To reduce friction, the circulating medium is pumped out at this time. When vibration needs to be eliminated, the circulating medium is injected through the liquid inlet 5082 to deform the outer ring body 509 and the inner ring body 508. The outer ring body 509 abuts against the inner wall of the convex ring, which can not only play a buffering role but also play a certain braking role.

[0067] As a feasible implementation manner, as Figure 5 and Figure 11 shown, guide members 510 connected to both sides of the plugging member 507 are further provided in the buffer cavity 506. The guide members 510 extend from the bottom of the buffer cavity 506 towards the connection between the plugging member 507 and the main body 5091, and the guide members 510 are in an arc shape arched towards the outside. The two guide members 510 are arranged vertically along the height direction of the plugging member 507. When the pressure of the circulating medium in either the second left sub-cavity 504 or the second right sub-cavity 505 is greater than the preset threshold, the circulating medium on one side squeezes the plugging member 507 to deform it, thereby quickly connecting the first chamber 501 and the second chamber 502 to achieve the purpose of quickly reducing large amplitudes and effectively alleviating vibration.

[0068] Preferably, as Figure 6 and Figure 9 shown, the second left sub-cavity 504 and the second right sub-cavity 505 include a U-shaped section 5021 and a straight section 5022 arranged in a curved manner. Second liquid flow holes 5083 communicating with the first chamber 501 are further provided on the inner ring body 508, and the two second liquid flow holes 5083 are respectively arranged at the ends of the U-shaped section 5021.

[0069] As Figure 6 and Figure 9 shown, the first left sub-chamber and the first right sub-chamber of this embodiment are communicated with the buffer chamber 506 through the flow passage 503. The second left sub-chamber 504 is communicated through the left communication groove 5024 provided on the internal gear ring, and the second right sub-chamber 505 is communicated through the right communication groove 5025 provided on the internal gear ring. When the yaw system is in low-frequency vibration, the pressure borne by the flowing medium is low. By setting the curved U-shaped section 5021, the flow path of the flowing medium can be increased, the movement friction of the flowing medium can be increased, and the vibration can be reduced.

[0070] As Figures 8 to 10 shown, the second liquid flow hole 5083 is arranged at the end of the U-shaped section 5021 and is used to communicate the first chamber 501 and the second chamber 502. When the pressure in the first chamber 501 is too high, slow pressure relief can be carried out through the second chamber 502 located on the outside, increasing the stability and uniform stress of the yaw system.

[0071] Preferably, as Figure 6 shown, a vertical section 5023 for communicating the two is provided on the straight section 5022 of the second left sub-chamber 504 and the second right sub-chamber 505, and the vertical section 5023 is arranged on the opposite side of the buffer chamber 506. Setting the vertical section 5023 can make the pressure in the second chamber always remain balanced. After the sealing member 507 deforms, when the first chamber 501 and the second chamber 502 are communicated, the internal and external pressures can be quickly balanced.

[0072] The yaw device of the wind turbine generator with a vibration protection mechanism in this embodiment, by setting the inner and outer layers of the first chamber 501 and the second chamber 502, can not only relieve the vibration on the side close to the rotating seat 4, but also relieve the vibration on the side of the fixed seat 2. And by setting the buffer chamber 506, the sealing member 507, and the flow passage 503, the pressure change in the buffer assembly 5 is affected by the vibration change, so that the sealing member 507 deforms and quickly communicates the first chamber 501 and the second chamber 502, realizing the rapid absorption of vibration and improving the stability of the yaw system.

[0073] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A yaw device for a wind turbine generator with a vibration protection mechanism, characterized in that: It includes a fixed seat (2) connected to the yaw gear ring (1), a rotating seat (4) connected below the yaw bearing (3), and a buffer assembly (5) provided between the fixed seat (2) and the rotating seat (4); The buffer assembly (5) is formed with a first chamber (501) and a second chamber (502) which are spaced inside and outside, and a circulating medium is provided in the first chamber (501) and the second chamber (502); A circulation channel (503) communicating the two is provided between the first chamber (501) and the second chamber (502). The first chamber (501) includes a first left sub-chamber and a first right sub-chamber. The second chamber (502) includes a second left sub-chamber (504) and a second right sub-chamber (505). A buffer chamber (506) is further provided between the second left sub-chamber (504) and the second right sub-chamber (505); The first left sub-chamber, the second left sub-chamber (504), the first right sub-chamber and the second right sub-chamber (505) are all communicated with the buffer chamber (506); The circulation channel (503) is provided in the buffer chamber (506), and a blocking member (507) is further provided in the buffer chamber (506). When the pressure in either the second left sub-chamber (504) or the second right sub-chamber (505) is greater than a preset threshold, the circulating medium squeezes the blocking member (507) to deform, so that the second left sub-chamber (504) and the second right sub-chamber (505) are communicated.

2. The yaw device for a wind turbine generator with a vibration protection mechanism according to claim 1, characterized in that: The buffer assembly (5) is made of a rubber part, and the buffer assembly (5) includes an inner ring body (508) and an outer ring body (509) arranged layer by layer from the inside out; The first chamber (501) is formed inside the inner ring body (508), and the second chamber (502) and the buffer chamber (506) are both formed on the circumference of the inner ring body (508). The inner hole of the outer ring body (509) abuts against the outer circumference of the inner ring body (508), so that the second chamber (502) and the buffer chamber (506) form a sealed cavity.

3. The yaw device for a wind turbine generator with a vibration protection mechanism according to claim 2, characterized in that: The first chamber (501) includes at least two chamber pipes (5011). An annular chamber (5081) is formed in the inner ring body (508). The plurality of chamber pipes (5011) are arranged at intervals in the height direction of the inner ring body (508) in the annular chamber (5081); A vertical pipe (5012) is provided between the plurality of chamber pipes (5011), and the vertical pipe (5012) is communicated with the inner cavity of each chamber pipe (5011); A liquid inlet (5082) communicated with the vertical pipe (5012) is provided on the inner ring body (508).

4. The yaw device for a wind turbine generator with a vibration protection mechanism according to claim 2, characterized in that: The outer ring body (509) includes a main body (5091) covering the outside of the inner ring body (508), and blocking plates (5092) provided on both sides of the main body (5091), and the blocking plates (5092) abut against the upper and lower ends of the inner ring body (508).

5. The yaw device of a wind turbine generator with a vibration protection mechanism according to claim 3, characterized in that: The flow passage (503) includes a plurality of first liquid flow holes communicating with the cavity tube (5011), the first liquid flow holes penetrate through the inner ring body (508), and the first liquid flow holes communicate the cavity tube (5011) with the buffer cavity (506).

6. The yaw device of a wind turbine generator with a vibration protection mechanism according to claim 3, characterized in that: A convex column (6) extending towards the center is further provided inside the inner ring body (508), and the liquid inlet (5082) is formed on the convex column (6); A U-shaped groove (401) is provided on the rotating seat (4), and the convex column (6) is clamped in the U-shaped groove (401).

7. The yaw device of a wind turbine generator with a vibration protection mechanism according to claim 4, characterized in that: Guide members (510) connected to both sides of the blocking member (507) are further provided in the buffer cavity (506), and the guide members (510) extend from the bottom of the buffer cavity (506) towards the connection between the blocking member (507) and the main body (5091); The guide member (510) is in an arc shape arched towards the outside.

8. The yaw device of a wind turbine generator with a vibration protection mechanism according to claim 2, characterized in that: The second left sub-cavity (504), and / or, the second right sub-cavity (505) includes a U-shaped section (5021) and a straight section (5022) arranged in a curved manner; The inner ring body (508) is further provided with second liquid flow holes (5083) communicating with the first chamber (501), and the two second liquid flow holes (5083) are respectively arranged at the ends of the U-shaped section (5021).

9. The yaw device of a wind turbine generator with a vibration protection mechanism according to claim 8, characterized in that: A vertical section (5023) communicating the two is provided in the straight sections (5022) of the second left sub-cavity (504) and the second right sub-cavity (505); The vertical section (5023) is arranged on the opposite side of the buffer cavity (506).

10. The yaw device of a wind turbine generator with a vibration protection mechanism according to claim 8, characterized in that: A plurality of long grooves recessed inward are further formed on the outer wall of the inner ring body (508), and the plurality of long grooves are communicated through an air flow passage, and the inner ring body (508) is provided with air outlet holes communicating the long grooves with the first chamber (501).

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