A yaw bearing assembly vibration isolation device for a wind turbine

Abstract

The application relates to a wind turbine yaw bearing assembly vibration isolation device, which comprises a nacelle body, the bottom of the nacelle body is provided with a yaw bearing assembly, the bottom of the yaw bearing assembly is detachably connected with an upper mounting ring plate, the lower end surface of the upper mounting ring plate is fixed with an upper connecting ring plate through a plurality of first fixing blocks, the lower side of the upper connecting ring plate is provided with a lower mounting ring plate, vibration isolation support assemblies, damping assemblies and limiting anti-falling assemblies are circumferentially arranged between the upper connecting ring plate and the lower connecting ring plate. The vibration isolation support assemblies are provided, the composite structure of the steel plate and the rubber pad is alternately overlapped, the vertical bearing stiffness and the multidirectional elastic deformation capacity are considered, the vibration transmitted by the tower drum can be flexibly buffered and isolated while the self weight of the nacelle is stably borne, the rigid vibration transmission is effectively blocked, the nacelle vibration amplitude is greatly reduced, and the problems of the direct vibration transmission of the existing rigid connection structure, the violent nacelle vibration and the easy fatigue damage of the components are solved.

Description

Technical Field

[0001] This invention relates to the field of wind power generation equipment technology, and in particular to a vibration isolation device for the yaw load-bearing component of a wind turbine generator set. Background Technology

[0002] The nacelle of a wind turbine integrates core precision equipment such as gearboxes, generators, and electrical control devices, serving as the core carrier for energy conversion in wind power generation. During wind turbine operation, factors such as natural wind load disturbances, high-speed blade rotation, yaw adjustment, and seismic impacts cause the tower to continuously generate multi-dimensional vibrations and periodic swaying. The vibration stress is transmitted upwards to the nacelle, which can easily cause problems such as overall nacelle resonance, component fatigue wear, loose connecting bolts, and accuracy deviations of precision electrical control components, seriously affecting the operational stability and service life of the wind turbine.

[0003] Currently, traditional wind turbine nacelles and towers are often directly fixed using rigid flanges, allowing tower vibrations to be directly transmitted to the nacelle. This results in high vibration transmission efficiency, large nacelle vibration amplitude, and long-term continuous vibration, which can easily lead to fatigue damage and frequent failures of turbine components, resulting in high maintenance costs. Secondly, the existing simple vibration reduction structures rely solely on a single rubber pad for passive vibration reduction, providing only a simple buffering effect. They lack efficient damping and energy dissipation capabilities and cannot dissipate low-frequency reciprocating vibration energy. Consequently, the nacelle is prone to continuous rebound swaying and low-frequency resonance, resulting in poor vibration reduction performance under all operating conditions. Summary of the Invention

[0004] The technical problem to be solved by the present invention is: in order to overcome the shortcomings of the prior art, the present invention provides a vibration isolation device for the yaw load-bearing component of a wind turbine generator set, which solves the technical problems of strong vibration transmission, frequent low-frequency resonance and poor vibration reduction effect between the nacelle and the tower of the wind turbine generator set in the prior art.

[0005] The technical solution adopted by this invention to solve its technical problem is: a vibration isolation device for a yaw bearing component of a wind turbine generator set, installed between the nacelle and the tower of the wind turbine generator set, including a nacelle body, the yaw bearing component installed at the bottom of the nacelle body, an upper mounting ring plate detachably connected to the bottom of the yaw bearing component, an upper connecting ring plate fixed to the lower end face of the upper mounting ring plate by a plurality of first fixing blocks, a lower mounting ring plate provided on the lower side of the upper connecting ring plate, a lower connecting ring plate fixed to the upper end face of the lower mounting ring plate by a plurality of second fixing blocks, a transition bracket detachably connected to the lower end face of the lower mounting ring plate, the tower located below the transition bracket, a flange fixed to the top of the tower, the flange detachably connected to the transition bracket, and circumferentially provided between the upper connecting ring plate and the lower connecting ring plate. A plurality of vibration isolation support assemblies, wherein the vibration isolation support assemblies have elastic load-bearing bodies for providing elastic support; Several damping components, wherein the damping components have damping rods for dissipating energy from vibrations; Several limiting and anti-detachment components, wherein each limiting and anti-detachment component has an anti-detachment block for limiting the displacement of the cabin body when the vibration amplitude exceeds a preset threshold, and the upper end face of the anti-detachment block is fixedly connected to a limiting post.

[0006] Specifically, the vibration isolation support assembly includes a first mounting head fixed at both the upper and lower ends of the elastic bearing body, and the first mounting head is threaded with a first nut that fixes the elastic bearing body between the lower end face of the upper connecting ring plate and the upper end face of the lower connecting ring plate.

[0007] Optionally, the number of vibration isolation support components is four to eight, and the elastic bearing body is formed by alternating and fixing multiple layers of rubber pads and multiple layers of steel plates.

[0008] Specifically, the damping assembly includes second mounting heads disposed at the upper and lower ends of the damping rod. The outer ends of the second mounting heads are respectively fixed to the upper connecting ring plate and the lower connecting ring plate by second nuts. A ball sleeve is fixed to the inner end of the second mounting head. A ball head is rotatably disposed inside the ball sleeve. A connecting seat is fixed to the inner end of the ball head. The damping rod is rotatably connected between the connecting seats.

[0009] Optionally, the number of damping components is four to eight, and the damping components and vibration isolation support components are arranged alternately in the circumferential direction.

[0010] Specifically, the limiting and anti-detachment assembly includes a plurality of limiting sleeves circumferentially disposed between the upper connecting ring plate and the lower connecting ring plate. The anti-detachment block is slidably disposed within the limiting sleeve. A limiting post is fixedly connected to the upper end face of the anti-detachment block. The top end of the limiting post penetrates the top wall of the limiting sleeve and extends upward. A third mounting head is fixedly connected to the bottom of the limiting sleeve and the top end of the limiting post, respectively. A third nut corresponding to the upper connecting ring plate and the lower connecting ring plate is threaded onto the third mounting head.

[0011] Furthermore, a buffer pad is fixed on the inner bottom wall of the limiting sleeve, and a buffer ring is fixed on the inner top wall of the limiting sleeve. The buffer pad and the buffer ring can be made of rubber block, polyurethane pad or composite elastic pad.

[0012] Optionally, the number of limiting and anti-detachment components is eight to sixteen, and the limiting and anti-detachment components are respectively located on both sides of the damping component.

[0013] Furthermore, a bottom ring is fixed on the inner wall of the inner ring of the lower connecting ring plate, and a plurality of radial horizontal limiting blocks are circumferentially spaced on the upper end face of the bottom ring. The limiting direction of the radial horizontal limiting blocks is set along the radial direction of the tower. A contact ring plate that cooperates with the radial horizontal limiting blocks is fixedly connected to the inner wall of the inner ring of the upper connecting ring plate, and there is a radial limiting gap between the radial horizontal limiting blocks and the contact ring plate.

[0014] Furthermore, the upper end face of the bottom ring is provided with a plurality of circumferential anti-torsion limiting blocks, and the lower end face of the contact ring plate is provided with circumferential anti-torsion limiting plates that cooperate with the circumferential anti-torsion limiting blocks. The circumferential anti-torsion limiting blocks and the circumferential anti-torsion limiting plates are arranged opposite each other in the circumferential direction and there is a circumferential limiting gap between them.

[0015] The beneficial effects of this invention are: 1. By setting up vibration isolation support components, a composite structure of alternating steel plates and rubber pads is used to balance vertical load-bearing stiffness and multi-directional elastic deformation capacity. While stabilizing the self-weight of the nacelle, the vibration transmitted by the tower is flexibly buffered and isolated, effectively blocking the transmission of rigid vibration, significantly reducing the vibration amplitude of the nacelle, and solving the problems of direct vibration transmission, severe nacelle vibration, and easy fatigue damage of components in existing rigid connection structures.

[0016] 2. By setting up damping components and relying on the ball joint universal hinge adaptive structure to adapt to multi-directional vibration offset, the mechanical energy of the cabin reciprocating vibration can be continuously dissipated, vibration rebound and low-frequency resonance can be suppressed, and the vibration state can be quickly restored. This solves the problems of traditional simple vibration reduction structures, such as no damping energy consumption, easy continuous shaking, and poor low-frequency vibration reduction effect.

[0017] 3. By setting limit components, normal vibration isolation deformation is not interfered with under normal working conditions. When the vibration exceeds the threshold under extreme working conditions, the excessive displacement and vertical separation displacement of the engine room can be quickly limited. Combined with buffer components to weaken rigid impact, safety protection under extreme working conditions is achieved, which solves the problems of traditional structures having no limit limit protection, easy structural failure under extreme working conditions, and potential safety hazards. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention in its installed state.

[0020] Figure 2 This is a three-dimensional structural diagram of the entire invention.

[0021] Figure 3 This is a three-dimensional structural diagram of the present invention after the transition support is removed.

[0022] Figure 4This is a schematic diagram of the main structure after the transition support is removed in this invention.

[0023] Figure 5 This is a schematic diagram of the installation structure of the vibration isolation support assembly described in this invention.

[0024] Figure 6 This is a structural schematic diagram of the vibration isolation support assembly described in this invention.

[0025] Figure 7 This is a schematic diagram of the installation structure of the damping component described in this invention.

[0026] Figure 8 This is a schematic diagram of the structure of the damping component described in this invention.

[0027] Figure 9 This is a schematic diagram of the installation structure of the limiting and anti-detachment component described in this invention.

[0028] Figure 10 This is a schematic diagram of the structure of the limiting and anti-detachment component described in this invention.

[0029] In the diagram: 1. Cabin body; 2. Yaw bearing assembly; 3. Upper mounting ring plate; 4. First fixing block; 5. Upper connecting ring plate; 6. Lower mounting ring plate; 7. Second fixing block; 8. Lower connecting ring plate; 9. Transition bracket; 10. Tower; 11. Flange; 12. Vibration isolation support assembly; 1201. Elastic bearing body; 120101. Rubber pad; 120102. Steel plate; 1202. First mounting head; 1203. First nut; 13. Damping assembly; 1301. Second mounting head; 1302. Second nut; 1303. Ball sleeve; 1304. Ball head; 1305. Connecting seat; 1306. Damping rod; 14. Limiting and anti-detachment assembly; 1401. Limiting sleeve; 1402. Anti-detachment block; 1403. Limiting post; 1404. Third mounting head; 1405. Third nut; 1406. Buffer pad; 1407. Buffer pad ring; 15. Bottom ring; 16. Radial horizontal limiting block; 17. Contact ring plate; 18. Circumferential anti-torsion limiting block; 19. Circumferential anti-torsion limiting plate. Detailed Implementation

[0030] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0031] like Figures 1-10As shown, a vibration isolation device for a yaw bearing component of a wind turbine generator set is installed between the nacelle and the tower 10 of the wind turbine generator set. The nacelle includes a nacelle body 1, a flange 11 is fixed to the top of the tower 10, and a transition bracket 9 is detachably fixed to the flange 11 by a bolt assembly. A yaw bearing component 2 is installed at the bottom of the nacelle body 1.

[0032] The bottom of the yaw bearing assembly 2 is detachably connected to an upper mounting ring plate 3 via a bolt assembly. The lower end face of the upper mounting ring plate 3 is fixed to an upper connecting ring plate 5 via multiple circumferentially distributed first fixing blocks 4. The transition bracket 9 is detachably connected to a lower mounting ring plate 6 via a bolt assembly. The upper end face of the lower mounting ring plate 6 is fixed to a lower connecting ring plate 8 via multiple circumferentially distributed second fixing blocks 7.

[0033] Between the upper connecting ring plate 5 and the lower connecting ring plate 8, there are respectively: six vibration isolation support components 12 for providing elastic support for the cabin body 1; six damping components 13 for dissipating energy from vibration; and twelve limit and anti-detachment components 14 for limiting the displacement of the cabin body 1 when the vibration amplitude exceeds a preset threshold.

[0034] An integrated vibration isolation connection layer with elastic buffering, damping energy dissipation, and limiting protection is constructed between the yaw load-bearing component 2 of the wind turbine generator and the top of the tower 10 to overcome the structural defects of the traditional rigid connection between the wind turbine nacelle and the tower 10. The overall vibration isolation structure uses the tower 10, flange 11, and transition bracket 9 as the lower fixed base, and the lower mounting ring plate 6 and lower connecting ring plate 8 form the lower load-bearing reference. The specific structure and connection method of the nacelle body 1 and the yaw load-bearing component 2 are existing technologies and will not be described in detail here. The nacelle body 1 and the yaw load-bearing component 2, together with the upper mounting ring plate 3 and the upper connecting ring plate 5, form the upper follow-up load-bearing structure. The vibration isolation support component 12, damping component 13, and limiting protection are integrated between the upper connecting ring plate 5 and the lower connecting ring plate 8. The three core functional structures of the detachment component 14 are as follows: Under normal operating conditions, the elastic and flexible deformation of the vibration isolation support component 12 weakens the rigid transmission of wind vibration and unit operation vibration, achieving vibration softening and buffering; simultaneously, the damping component 13 converts the mechanical energy of vibration into heat energy for dissipation, attenuating the vibration amplitude; under extreme strong wind, earthquake, and impact conditions, the limit anti-detachment component 14 and the circumferential and radial limit structures limit excessive displacement, torsion, and detachment displacement of the nacelle, achieving safety protection; the whole structure can adapt to multiple operating conditions such as normal wind turbine operation, small disturbances, and extreme loads, taking into account multiple functions such as vertical bearing, flexible vibration isolation, high-efficiency energy consumption, and extreme limit protection, effectively reducing fatigue damage to the tower 10 and foundation structure, and improving the operational stability and service life of the wind turbine generator set.

[0035] See Figures 2-6As shown, the vibration isolation support assembly 12 includes an elastic bearing 1201 disposed between the upper connecting ring plate 5 and the lower connecting ring plate 8. The elastic bearing 1201 is composed of multiple layers of rubber pads 120101 and multiple layers of steel plates 120102. The rubber pads 120101 and the steel plates 120102 are alternately stacked and fixedly connected.

[0036] Both ends of the elastic support body 1201 are fixed with a first mounting head 1202, and the first mounting head 1202 is threaded with a first nut 1203 that fixes the elastic support body 1201 between the lower end face of the upper connecting ring plate 5 and the upper end face of the lower connecting ring plate 8.

[0037] The vibration isolation support assembly 12 bears the vertical load and provides vibration softening and buffering for the entire wind turbine generator set. It is fixed to the upper connecting ring plate 5 and lower connecting ring plate 8 by two first mounting heads 1202, respectively, and secured with first nuts 1203. This modular, detachable assembly ensures secure installation, convenient disassembly and assembly, and easy maintenance and replacement. The elastic bearing body 1201 adopts a composite structure with alternating layers of rubber pads 120101 and steel plates 120102. The steel plates 120102 significantly improve the overall vertical compressive stiffness and load-bearing capacity, stably supporting the enormous weight of the nacelle body 1 and preventing structural damage. The structure is subjected to pressure and collapse deformation; the rubber pad 120101 has excellent elastic deformation capability and can generate controllable shear elastic deformation in the horizontal direction. When the wind turbine is disturbed by wind, the blades rotate and vibrate, the unit transmission operation vibration or slight earthquake vibration, the vibration transmitted upward by the tower 10 is transmitted to the elastic bearing 1201 through the lower connecting ring plate 8. The flexible elastic deformation of the rubber layer absorbs, buffers and softens the vibration impact, transforming the traditional rigid hard connection into a flexible soft connection, greatly reducing the amplitude of the vibration transmitted upward to the nacelle body 1, achieving the first layer of vibration isolation and buffering effect, weakening the vibration transmission from the source and reducing the vibration response of the whole machine.

[0038] The arrangement of the six vibration isolation support components 12 can be flexibly adjusted according to the wind turbine capacity, nacelle weight, center of gravity offset, and tower top stress distribution. When the vibration isolation support components 12 are evenly arranged around the flange 11 at the top of the tower 10, each elastic bearing 1201 is subjected to balanced force and coordinated deformation, which can achieve uniform vibration isolation and buffering in the entire circumference. This meets the vibration isolation requirements of conventional nacelles with a central center of gravity, ensuring consistent buffering effects for wind vibration and operational vibration in all directions. For conditions where the nacelle center of gravity is offset and the tower top experiences localized stress concentration, the vibration isolation support components 12 can be arranged in a non-uniform and differentiated manner. They can be densely arranged in areas with high stress and strong vibration response to increase stiffness, while being conventionally arranged in areas with lower stress. This precisely matches the stress characteristics of the tower top, effectively improving the problems of localized stress concentration and excessive localized vibration, enhancing the overall vibration isolation uniformity and structural adaptability, and ensuring stable and reliable first-level elastic vibration isolation under complex stress conditions.

[0039] See Figures 2-4 , Figure 7 , Figure 8 As shown, the damping assembly 13 includes a damping rod 1306 and second mounting heads 1301 disposed at the upper and lower ends of the damping rod 1306. The outer ends of the second mounting heads 1301 are respectively fixed to the upper connecting ring plate 5 and the lower connecting ring plate 8 by second nuts 1302. A ball sleeve 1303 is fixed to the inner end of the second mounting head 1301. A ball head 1304 is rotatably disposed inside the ball sleeve 1303. A connecting seat 1305 is fixed to the inner end of the ball head 1304. The damping rod 1306 is rotatably connected between the connecting seats 1305.

[0040] Six damping components 13 and six vibration isolation support components 12 are arranged alternately along the circumference, working together to achieve efficient dissipation and attenuation of vibration energy. The damping components 13 are modularly fixed by locking the upper and lower second mounting heads 1301 and second nuts 1302. The assembly structure is stable, easy to disassemble and assemble, and the parameters are adjustable. The two ends adopt a universal hinge structure with ball sleeves 1303 and ball heads 1304, so that the middle damping rod 1306 can adapt to the horizontal relative displacement, small rotation angle, and multi-directional oscillation between the nacelle and the tower 10, and adapt to the complex multi-dimensional vibration conditions of the wind turbine. When the elastic bearing 1201 undergoes elastic deformation, the damping rod 1306 generates extension, shear, and oscillation damping effects with the relative displacement, continuously converting the mechanical energy generated by vibration into heat energy for dissipation, rapidly attenuating the vibration amplitude, and suppressing the reciprocating oscillation. Through the synergistic effect of primary buffering and secondary energy dissipation, the overall vibration isolation effect is greatly improved, and the vibration of wind turbine operation and wind-induced swaying are quickly smoothed.

[0041] The damping component 13 and the vibration isolation support component 12 are arranged alternately along the circumference, forming an interlaced and coordinated structure of one elastic support and one damping energy dissipation. This ensures that each elastic deformation area is matched with a corresponding energy dissipation area, avoiding areas where there is sufficient vibration isolation but insufficient energy dissipation. This ensures that vibrations in the entire circumference can be effectively buffered and dissipated. At the same time, the interlaced arrangement makes the overall structural stiffness and damping distribution uniform, the force symmetrical, and the deformation coordinated, effectively avoiding the problems of overall machine eccentricity and increased local sway, and greatly improving the overall attenuation efficiency of multi-directional vibration of the wind turbine.

[0042] Under normal operating conditions, the damping components 13 are evenly distributed around the flange 11 to ensure consistent energy dissipation capacity in all directions, making them suitable for conventional wind loads and uniform vibration conditions. However, for complex operating conditions such as nacelle center of gravity offset, severe vibration in a specific direction at the top of the tower, and concentrated force on one side of the yaw support, the damping components 13 can be densified in the direction of vibration dominance and the area of ​​concentrated force to improve the damping energy dissipation coefficient in that direction and accurately suppress large-amplitude vibrations in a specific direction.

[0043] The damping component 13 adopts a fully modular and detachable structure, which is convenient to disassemble and replace. It can be adapted to wind turbine generators with different capacities, weights, and vibration characteristics. The number of damping components 13, installation angle, and damping parameters can be flexibly adjusted according to the size of the generator set, the weight of the nacelle, the natural vibration frequency of the tower top, and the wind field environmental load. It can accurately match the target vibration reduction index of the generator set and achieve differentiated adaptation for small generator sets with light damping and large generator sets with strong damping. The structure has strong versatility and adjustability, and can effectively adapt to the vibration isolation and reduction requirements of different wind fields, different generator sets, and different operating conditions.

[0044] See Figures 2-4 , Figure 9 , Figure 10 As shown, the limiting and anti-detachment assembly 14 includes a limiting sleeve 1401 circumferentially disposed between the upper connecting ring plate 5 and the lower connecting ring plate 8. An anti-detachment block 1402 is slidably disposed inside the limiting sleeve 1401. A limiting post 1403 is fixed to the upper end face of the anti-detachment block 1402. The top end of the limiting post 1403 penetrates the top wall of the limiting sleeve 1401 and extends upward. A third mounting head 1404 is fixedly connected to the bottom of the limiting sleeve 1401 and the top end of the limiting post 1403, respectively. A third nut 1405 corresponding to the upper connecting ring plate 5 and the lower connecting ring plate 8 is threaded onto the third mounting head 1404.

[0045] A buffer pad 1406 is fixed on the inner bottom wall of the limiting sleeve 1401, and a buffer ring 1407 is fixed on the inner top wall of the limiting sleeve 1401. The buffer pad 1406 and the buffer ring 1407 can be made of rubber, polyurethane or composite elastic pad.

[0046] The limiting and anti-detachment component 14 does not participate in operation under normal conditions, but only plays a limiting and protective role under conditions of large vibration and extreme load. The limiting and anti-detachment component 14 is modularly fixed by the upper and lower third mounting heads 1404 and the third nut 1405. The limiting column 1403 and the anti-detachment block 1402 can slide vertically along the inside of the limiting sleeve 1401, with a pre-set free deformation gap. Under normal operation of the wind turbine, small wind vibration and normal yaw conditions, the limiting structure does not contact or limit, and does not interfere with the normal flexible vibration isolation and energy dissipation operation of the vibration isolation support component 12 and the damping component 13, ensuring the free deformation and vibration reduction of the vibration isolation system. The effect is unaffected; when encountering strong winds, earthquakes, emergency braking, or sudden impact loads, causing the cabin to vertically jump or exceed the limits, the anti-detachment block 1402 and the limiting post 1403 will flexibly contact and limit the buffer pad 1406 and buffer pad ring 1407 inside the limiting sleeve 1401, limiting the maximum vertical relative displacement between the upper connecting ring plate 5 and the lower connecting ring plate 8, preventing the vibration isolation structure from being overstretched, detached, or failing. At the same time, the rigid impact of the limiting contact is weakened by the elastic buffer structure, avoiding secondary vibration and structural damage caused by the limiting collision, thus achieving multiple safety protections of vertical anti-detachment, displacement limiting, and buffer anti-collision.

[0047] The twelve limit anti-detachment components 14 are respectively set on both sides of the damping component 13, in a circumferentially uniform state, or in a non-uniform arrangement according to the direction of the center of gravity offset of the nacelle body 1, the direction of the tower top bending moment and the stress state of the yaw support.

[0048] The limiting and anti-detachment component 14 can be flexibly adapted to the arrangement of the wind turbine unit according to its operating conditions. The uniform circumferential arrangement can achieve equal vertical anti-detachment limiting in the entire circumference, which can meet the stability protection requirements of the whole machine under normal operating conditions. For special operating conditions such as nacelle center of gravity shift, large unidirectional bending moment at the top of the tower, and severe unilateral vibration and impact, the limiting structure can be densely arranged in the direction of the dominant force and the direction of offset to improve the limit limiting capability in this area, accurately resist the risk of excessive unilateral displacement and detachment caused by extreme loads, and ensure the connection safety and structural stability of the whole machine under complex and extreme operating conditions.

[0049] See Figure 3 , Figure 5 As shown, a bottom ring 15 is fixed on the inner sidewall of the inner ring of the lower connecting ring plate 8. A plurality of radial horizontal limiting blocks 16 are circumferentially spaced on the upper end face of the bottom ring 15. The limiting direction of the radial horizontal limiting blocks 16 is set along the radial direction of the tower 10. A contact ring plate 17 that cooperates with the radial horizontal limiting blocks 16 is fixedly connected to the inner sidewall of the inner ring of the upper connecting ring plate 5. There is a radial limiting gap between the radial horizontal limiting blocks 16 and the contact ring plate 17.

[0050] The upper end face of the bottom ring 15 is provided with a plurality of circumferential anti-torsion limiting blocks 18, and the lower end face of the contact ring plate 17 is provided with circumferential anti-torsion limiting plates 19 that cooperate with the circumferential anti-torsion limiting blocks 18. The circumferential anti-torsion limiting blocks 18 and the circumferential anti-torsion limiting plates 19 are arranged opposite each other in the circumferential direction and there is a circumferential limiting gap between them.

[0051] Under normal operating conditions of wind turbine generator set, small wind load disturbance and normal yaw adjustment, a small range of horizontal relative displacement and slight relative rotation are allowed between the yaw bearing component 2 and the top flange 11 of the tower 10. At this time, the radial horizontal limiting block 16 and the radial limiting contact surface of the upper connecting ring plate 5 always maintain a preset radial limiting gap, and the circumferential anti-torsion limiting block 18 and the circumferential anti-torsion limiting plate 19 of the upper connecting ring plate 5 maintain a preset circumferential limiting gap. The two types of limiting structures do not contact, are not subjected to force, and do not participate in bearing, and do not restrict the flexible shear deformation of the vibration isolation support component 12 and the reciprocating energy dissipation action of the damping component 13, so as to maximize the flexible vibration isolation and vibration stabilization effect under normal operating conditions.

[0052] When a wind turbine encounters extreme conditions such as strong winds, earthquakes, emergency braking, or abnormal impact loads, if the horizontal displacement of the yaw bearing assembly relative to the top flange 11 of the tower 10 exceeds the preset radial limit gap, the upper connecting ring plate 5 will move horizontally with the upper bearing structure. The contact ring plate 17 will gradually approach and contact the radial horizontal limit block 16, providing a reverse limit constraint force through the rigid radial horizontal limit block 16. This restricts further horizontal radial displacement between the nacelle and the yaw bearing assembly 2, preventing the vibration isolation support assembly 12 from undergoing excessive horizontal shear deformation and structural defects. The system addresses issues such as structural tearing and deformation failure. Simultaneously, if the wind turbine experiences abnormal yaw impact or torsional sway, and the torsional angle of the yaw bearing component relative to the tower 10 axis exceeds the preset circumferential limit gap, the upper connecting ring plate 5 rotates significantly circumferentially along with the upper structure. The circumferential anti-torsion limit contact surface contacts the circumferential anti-torsion limit block 18, providing a reverse torsional constraint force through the circumferential rigid limit structure. This strictly limits the excessive relative torsional angle between the upper and lower connecting structures, eliminating the risks of torsional misalignment at the connection interface, structural impact, seal damage, and loosening or detachment of the connection.

[0053] Specifically, when the vibration isolation device of the yaw bearing component of the wind turbine generator set with the above structure is used: firstly, the overall structure is positioned and locked by the upper mounting ring plate 3, the lower mounting ring plate 6, the transition bracket 9, and the top flange 11 of the tower 10, thus stably building the flexible connection bearing base between the nacelle body 1 and the tower 10, providing a reliable structural foundation for subsequent elastic vibration isolation, damping energy dissipation, and limit protection. Under normal operating conditions such as normal power generation, regular yaw adjustment, and small wind load disturbances, the circumferentially uniformly or differentially distributed vibration isolation support components 12 give priority to playing a primary elastic buffering role. Relying on the composite structural characteristics of the alternating superposition of multiple layers of steel plates 120102 and rubber pads 120101 inside the vibration isolation support components 12, under the premise of stably bearing the overall self-weight of the nacelle body 1 and ensuring vertical bearing stiffness, the controllable shear elastic deformation of the rubber pads 120101 is used to flexibly buffer and isolate the unit operation vibration and micro-wind turbulence vibration transmitted upward from the tower 10, thereby weakening the rigid vibration transmission intensity from the source and reducing the upward transmission amplitude of vibration.

[0054] Meanwhile, the damping components 13, which are arranged alternately with the vibration isolation support components 12 in the circumferential direction, continuously convert the mechanical energy of vibration into heat energy dissipation through the small relative reciprocating displacement, multi-dimensional oscillation, and angle adaptive oscillation between the nacelle body 1 and the tower 10, effectively suppressing the vibration rebound of the elastic structure, low-frequency continuous shaking and resonance phenomena, quickly smoothing the vibration state of the nacelle, achieving a secondary energy dissipation and vibration stabilization effect, and ensuring the smooth operation of the wind turbine generator throughout the process. Under this normal working condition, the limit anti-detachment component 14, the radial horizontal limit block 16 and the circumferential anti-torsion limit block 18 all maintain a preset gap and are in an idle standby state, without contact, without force, and without interfering with the normal elastic deformation and energy dissipation process of the vibration isolation support components 12 and the damping components 13, thus maximizing the normal vibration isolation and vibration reduction effect.

[0055] When the generator set encounters extreme conditions such as strong winds, seismic excitation, emergency braking, or sudden mechanical impact, and the horizontal offset, circumferential torsion angle, and vertical deformation distance of the nacelle exceed the allowable range of conventional elastic vibration isolation, the limiting anti-detachment component 14 immediately triggers a three-level safety protection mechanism. Through the vertical sliding limiting cooperation between the limiting post 1403 and the limiting sleeve 1401, the maximum vertical deformation distance and vertical disengagement displacement of the nacelle body 1 are strictly limited. In conjunction with the internal buffer pad 1406 and buffer pad ring 1407 of the limiting sleeve 1401, the limiting contact effectively weakens the impact of the limiting contact. Rigid impact protection avoids secondary vibrations and structural damage caused by hard collisions. At the same time, the matching radial horizontal limiting block 16 and circumferential anti-torsion limiting block 18 intervene in protection. The radial horizontal limiting block 16, together with the radial limiting contact surface of the connecting ring plate 5, constrains the excessive horizontal radial displacement of the cabin. The circumferential anti-torsion limiting block 18, together with the circumferential anti-torsion limiting contact surface of the connecting ring plate 5, constrains the excessive circumferential torsion of the cabin. It comprehensively limits the excessive displacement of the cabin and effectively prevents problems such as tensile tearing, structural failure, and connection misalignment of the vibration isolation support assembly 12 and damping assembly 13 due to excessive deformation.

[0056] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A vibration isolation device for a yaw bearing component of a wind turbine generator set, disposed between the nacelle and the tower (10) of the wind turbine generator set, comprising a nacelle body (1), wherein the yaw bearing component (2) is installed at the bottom of the nacelle body (1), characterized in that: The bottom of the yaw bearing assembly (2) is detachably connected to an upper mounting ring plate (3). The lower end face of the upper mounting ring plate (3) is fixed to an upper connecting ring plate (5) by several first fixing blocks (4). A lower mounting ring plate (6) is provided on the lower side of the upper connecting ring plate (5). The upper end face of the lower mounting ring plate (6) is fixed to a lower connecting ring plate (8) by several second fixing blocks (7). A transition bracket (9) is detachably connected to the lower end face of the lower mounting ring plate (6). The tower (10) is located on the lower side of the transition bracket (9). A flange (11) is fixed to the top of the tower (10). The flange (11) is detachably connected to the transition bracket (9). The upper connecting ring plate (5) and the lower connecting ring plate (8) are respectively provided with the following circumferentially: Several vibration isolation support assemblies (12), wherein the vibration isolation support assembly (12) has an elastic bearing (1201) for providing elastic support. Several damping components (13), said damping components (13) having damping rods (1306) for dissipating energy from vibrations. Several limiting anti-detachment components (14) are provided, wherein the limiting anti-detachment components (14) have anti-detachment blocks (1402) for limiting the displacement of the cabin body (1) when the vibration amplitude exceeds a preset threshold, and the upper end face of the anti-detachment blocks (1402) is fixedly connected to a limiting post (1403).

2. The vibration isolation device for the yaw bearing assembly as described in claim 1, characterized in that: The vibration isolation support assembly (12) includes a first mounting head (1202) fixed at both ends of the elastic bearing (1201). The first mounting head (1202) is threaded with a first nut (1203) that fixes the elastic bearing (1201) between the lower end face of the upper connecting ring plate (5) and the upper end face of the lower connecting ring plate (8).

3. The vibration isolation device for the yaw bearing assembly as described in claim 2, characterized in that: The number of vibration isolation support components is four to eight, and the elastic bearing body (1201) is formed by alternating and fixing of multiple layers of rubber pads (120101) and multiple layers of steel plates (120102).

4. The vibration isolation device for the yaw load-bearing component as described in claim 1, characterized in that: The damping assembly (13) includes a second mounting head (1301) disposed at the upper and lower ends of the damping rod (1306). The outer ends of the second mounting head (1301) are respectively fixed to the upper connecting ring plate (5) and the lower connecting ring plate (8) by the second nut (1302). A ball sleeve (1303) is fixed to the inner end of the second mounting head (1301). A ball head (1304) is rotatably disposed inside the ball sleeve (1303). A connecting seat (1305) is fixed to the inner end of the ball head (1304). The damping rod (1306) is rotatably connected between the connecting seats (1305).

5. The vibration isolation device for the yaw bearing assembly as described in claim 4, characterized in that: The number of damping components (13) is four to eight, and the damping components (13) and the vibration isolation support components (12) are arranged alternately in the circumferential direction.

6. The vibration isolation device for the yaw bearing assembly as described in claim 1, characterized in that: The limiting and anti-detachment assembly (14) includes a plurality of limiting sleeves (1401) circumferentially arranged between the upper connecting ring plate (5) and the lower connecting ring plate (8). The anti-detachment block (1402) is slidably disposed in the limiting sleeve (1401). The upper end face of the anti-detachment block (1402) is fixedly connected to a limiting post (1403). The top end of the limiting post (1403) penetrates the top wall of the limiting sleeve (1401) and extends upward. The bottom of the limiting sleeve (1401) and the top end of the limiting post (1403) are respectively fixedly connected to a third mounting head (1404). The third mounting head (1404) is threaded with a third nut (1405) corresponding to the upper connecting ring plate (5) and the lower connecting ring plate (8).

7. The vibration isolation device for the yaw bearing assembly as described in claim 6, characterized in that: A buffer pad (1406) is fixed on the inner bottom wall of the limiting sleeve (1401), and a buffer pad ring (1407) is fixed on the inner top wall of the limiting sleeve (1401). The buffer pad (1406) and the buffer pad ring (1407) can be made of rubber blocks, polyurethane blocks or composite elastic blocks.

8. The vibration isolation device for the yaw bearing assembly as described in claim 7, characterized in that: The number of the limiting anti-detachment components (14) is eight to sixteen, and the limiting anti-detachment components (14) are located on both sides of the damping component (13).

9. The vibration isolation device for the yaw bearing assembly as described in claim 1, characterized in that: A bottom ring (15) is fixed on the inner side wall of the inner ring of the lower connecting ring plate (8). A plurality of radial horizontal limiting blocks (16) are arranged circumferentially on the upper end face of the bottom ring (15). The limiting direction of the radial horizontal limiting blocks (16) is arranged along the radial direction of the tower (10). A contact ring plate (17) that cooperates with the radial horizontal limiting blocks (16) is fixedly connected on the inner side wall of the inner ring of the upper connecting ring plate (5). There is a radial limiting gap between the radial horizontal limiting blocks (16) and the contact ring plate (17).

10. The vibration isolation device for the yaw bearing assembly as described in claim 9, characterized in that: The upper end face of the bottom ring (15) is provided with a plurality of circumferential anti-torsion limiting blocks (18), and the lower end face of the contact ring plate (17) is provided with circumferential anti-torsion limiting plates (19) that cooperate with the circumferential anti-torsion limiting blocks (18). The circumferential anti-torsion limiting blocks (18) and the circumferential anti-torsion limiting plates (19) are arranged opposite to each other in the circumferential direction and there is a circumferential limiting gap between them.

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