Foundation damping structure of wind turbine generator system and construction method

Abstract

The application discloses a foundation damping structure of a wind generating set and a construction method, relates to the technical field of wind power construction, and through the arrangement of a base, a first damping mechanism and a second damping mechanism, in use, a groove is formed in the base, the first damping mechanism is installed in the groove, the first damping mechanism extends downwards along the longitudinal direction to abut against a geological body, the second damping mechanism is installed on the top of the first damping mechanism, and the tower drum of the wind generating set is connected to the top of the second damping mechanism, so that the installation and connection of the wind generating set and the foundation damping structure are completed, the common action of the first damping mechanism and the second damping mechanism can reduce the damage risk of the foundation structure of the wind generating set caused by earthquakes and improve the safety of the wind generating set in the operation stage.

Description

Technical Field

[0001] This invention relates to the field of wind power construction technology, and in particular to a foundation vibration damping structure and construction method for wind turbine generator sets. Background Technology

[0002] Wind power, as a major green power generation technology, plays a very important role in providing clean energy. Typically, wind power generation is achieved by wind turbine generators installed in areas with abundant wind resources, generating electricity under the influence of natural wind. A wind turbine generator mainly consists of a tower, nacelle, wind turbine, and blades. In operation, a foundation must first be constructed on the ground. Once the foundation reaches the required strength, the tower is vertically placed on the foundation, and the bottom of the tower is secured to the foundation with bolts. After the tower and foundation are connected and fixed, the nacelle, wind turbine, and blades are installed in place, ultimately forming a wind turbine generator capable of generating wind power.

[0003] Currently, wind power technology covers mainstream environments including marine, hilly and mountainous, plains, and desert / grassland environments. However, regardless of the environment, a foundation is always required for building a wind farm. In earthquake-prone areas, earthquakes can easily damage the foundation structure of wind turbines. Current technology typically uses steel bases for protection against this problem. While steel bases can mitigate damage to wind turbines to some extent, rust and other issues can still affect the safe operation of the wind turbines during actual construction. Summary of the Invention

[0004] The main objective of this invention is to propose a foundation vibration reduction structure and construction method for wind turbine generator sets, aiming to solve the technical problem that earthquakes can easily cause foundation damage and affect the safe operation of wind turbine generator sets.

[0005] To achieve the above objectives, in a first aspect, the present invention proposes a foundation vibration damping structure for a wind turbine generator set, comprising:

[0006] The base is anchorable to the geological body. The top of the base has a groove extending downward in the longitudinal direction, and the bottom of the groove has a plurality of spaced first through holes, each of which penetrates the bottom of the groove in the longitudinal direction.

[0007] A first damping mechanism, mounted within the groove, with at least a portion passing through all the first through holes and extending downward, abutting against the geological body, is longitudinally slidable relative to the base within the groove and absorbs longitudinal waves transmitted by the geological body; and...

[0008] The second damping mechanism is housed in the groove and installed on top of the first damping mechanism. The top of the second damping mechanism has a mounting position connected to the tower of the wind turbine. The second damping mechanism can slide longitudinally with the inner wall of the groove. When receiving transverse waves transmitted by the geological body, the second damping mechanism can drive the tower to slide horizontally.

[0009] In one embodiment, the first damping mechanism includes:

[0010] Multiple first dampers are provided, the number of first dampers being the same as the number of first through holes and arranged in a one-to-one correspondence. The bottom of each first damper passes through the first through hole and slides longitudinally with the hole wall of the first through hole.

[0011] Multiple first damping components, the number of which corresponds to the number of first dampers and are fitted one-to-one onto the outer periphery of the corresponding first dampers, are housed within the groove, and both ends of the first damping components are respectively connected to the second damping mechanism and the bottom wall of the groove; and,

[0012] Multiple support blocks are provided, the number of which is the same as the number of the first dampers and they are installed one-to-one at the bottom of the first dampers. Each support block can abut against the geological body.

[0013] In one embodiment, the bottom of the base is further provided with an installation channel, the installation channel is located below the groove, and a partition plate is provided between the groove and the installation channel, the partition plate forming the bottom of the groove, the first through hole is formed in the partition plate, the bottom of the first damper extends into the installation channel, and the support block is accommodated in the installation channel;

[0014] The first damping mechanism further includes a plurality of second damping components, which are housed in the installation channel. The number of second damping components is the same as that of the first damper, and they are fitted one-to-one on the outer periphery of the corresponding first damper. The two ends of the second damping components along the longitudinal direction are respectively connected to the partition plate and the corresponding support block.

[0015] In one embodiment, the first damping mechanism further includes a third damping member, which is housed within the mounting channel and is capable of sliding longitudinally within the mounting channel. The third damping member is connected to the bottom of all the support blocks.

[0016] In one embodiment, the second damping mechanism includes:

[0017] The mounting plate is installed on the top of the first shock absorption mechanism. The mounting plate can slide longitudinally with the inner wall of the groove. The top of the mounting plate forms a mounting groove, and the bottom of the mounting groove is recessed longitudinally to form a sliding groove.

[0018] A shock-absorbing component is installed in the mounting groove, and a mounting space communicating with the sliding groove is formed at the center of the shock-absorbing component, the mounting space extending longitudinally through the shock-absorbing component;

[0019] A mounting base is installed within the installation space. The top of the mounting base forms the mounting position. The mounting base abuts against the damping assembly, and the bottom of the mounting base extends downward into the sliding groove. When the base receives the lateral wave, it transmits the signal to the damping assembly via the mounting plate. The damping assembly deforms horizontally and absorbs the lateral wave. When the lateral wave has no remaining clearance, the damping assembly can push the mounting base to slide along the sliding groove.

[0020] A cover plate is installed on top of the mounting plate and covers the mounting base within the mounting space. A longitudinal hole communicating with the mounting space is formed at the center of the cover plate. The tower can slide longitudinally through the longitudinal hole, and the mounting base can slide horizontally relative to the cover plate.

[0021] In one embodiment, a plurality of slots are formed at circumferential intervals on the inner wall of the mounting groove;

[0022] The shock absorption components include:

[0023] Multiple elastic bars, with any two adjacent slots engaging with both ends of one of the elastic bars, so that all the elastic bars enclose the mounting space; and,

[0024] Multiple damping elements are provided, the number of which is the same as the number of spring bars and they are arranged one-to-one on the side of the corresponding spring bar away from the installation space. The two ends of each damping element are respectively connected to the inner wall of the installation groove and the corresponding spring bar.

[0025] In one embodiment, each of the damping elements includes a plurality of second dampers, which are distributed at intervals along the circumference of the mounting groove, and the two ends of each second damper are respectively connected to the inner wall of the mounting groove and the corresponding elastic bar.

[0026] In one embodiment, the mounting base includes an integrally formed sliding section and a mounting section, the top of the mounting section forming the mounting position, the mounting section abutting against all the elastic bars, the sliding section being located below the mounting section, the sliding section extending downward into the sliding groove; and an elastic damping material filling the space between the sliding section and the inner wall of the sliding groove.

[0027] In one embodiment, the basic shock absorption structure further includes an anti-tipping mechanism installed on the top of the base, the anti-tipping mechanism being hinged to the groove wall of the groove, and the top of the anti-tipping mechanism being hinged to the tower.

[0028] Based on the same technical concept, in a second aspect, the present invention also proposes a construction method for a foundation damping structure of a wind turbine generator set, used for constructing the foundation damping structure described in the first aspect;

[0029] The construction method includes the following steps:

[0030] Excavation work is carried out in the pre-designated construction area to form a construction pit; wherein the geological body at the bottom of the construction pit is a rock layer;

[0031] Reinforced concrete is poured inside the construction pit to form the base; wherein the bottom of the base is anchored within the rock layer.

[0032] The first shock absorber and the second shock absorber are installed sequentially.

[0033] Sand and gravel are backfilled into the pit and compacted around the base to form the foundation shock-absorbing structure.

[0034] The technical solution of this invention, by setting up a base, a first damping mechanism, and a second damping mechanism, allows the first damping mechanism to be installed in a groove formed within the base during use. The first damping mechanism extends longitudinally downwards to contact the geological body. Simultaneously, the second damping mechanism is installed on top of the first damping mechanism, connecting the wind turbine tower to the top of the second damping mechanism, thus completing the installation connection between the wind turbine and the foundation damping structure. When the base receives longitudinal and transverse waves transmitted from the geological body, the first damping mechanism absorbs the longitudinal waves, causing the second damping mechanism and the tower mounted on it to tend to slide longitudinally, thereby reducing the direct damage to the tower caused by longitudinal waves. Simultaneously, the second damping mechanism absorbs transverse waves, further reducing the direct damage to the tower caused by transverse waves. Through the combined action of the first and second damping mechanisms, this invention reduces the risk of earthquake damage to the foundation structure of the wind turbine and improves the safety of the wind turbine during operation. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0036] Figure 1 A schematic diagram of the foundation vibration damping structure of the wind turbine generator provided by the present invention during use;

[0037] Figure 2 for Figure 1 A schematic diagram of the basic damping structure in the example;

[0038] Figure 3 for Figure 2 A schematic diagram of the internal structure of the basic damping structure in the example;

[0039] Figure 4 for Figure 2 A schematic diagram of the second damping mechanism in the example;

[0040] Figure 5 for Figure 4 A schematic diagram of the second shock absorber mechanism in the example, showing its explosive state.

[0041] Figure 6 This is a schematic flowchart illustrating the construction method of the foundation vibration damping structure for a wind turbine generator set, as exemplified by the present invention.

[0042] Explanation of icon numbers:

[0043] 100, Base; 110, Groove; 200, First damping mechanism; 300, Second damping mechanism; 210, First damper; 220, First damping component; 230, Support block; 120, Installation channel; 130, Divider plate; 240, Second damping component; 250, Third damping component; 310, Mounting plate; 320, Mounting groove; 330, Sliding groove; 340, Damper assembly; 350, Installation space; 360, Mounting seat; 370, Cover plate; 380, Snap-fit ​​component; 390, Snap-fit ​​groove; 341, Spring bar; 342, Damping component; 343, Second damper; 344, Elastic damping material; 400, Anti-tipping mechanism; 410, Third damper; 420, Fourth damping component; 160, Anchor; 500, Tower.

[0044] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0045] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0046] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0047] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0048] This invention proposes a foundation vibration reduction structure and construction method for wind turbine generator sets.

[0049] Please see Figures 1 to 6 For ease of understanding, this wind turbine foundation vibration damping structure includes a base 100, a first vibration damping mechanism 200, and a second vibration damping mechanism 300. The base 100 can be anchored to the geological mass. A groove 110 extending longitudinally downward is formed on the top of the base 100. A plurality of spaced-apart first through holes are formed on the bottom of the groove 110. Each first through hole penetrates the bottom of the groove 110 longitudinally. The first vibration damping mechanism 200 is installed in the groove 110, and at least a portion of the first vibration damping mechanism 200 passes through all the first through holes and extends downward. The first damping mechanism 200 is in contact with the geological body. It can slide longitudinally relative to the base 100 within the groove 110 and absorb the longitudinal waves transmitted by the geological body. The second damping mechanism 300 is housed in the groove 110 and installed on top of the first damping mechanism 200. The top of the second damping mechanism 300 has a mounting position, which is connected to the tower 500 of the wind turbine. The second damping mechanism 300 can slide longitudinally with the inner wall of the groove 110. When receiving the transverse waves transmitted by the geological body, the second damping mechanism 300 can drive the tower 500 to slide horizontally.

[0050] Specifically, the base 100 is a reinforced concrete structure that can be anchored to the geological mass by multiple anchors 160, preferably prestressed anchor cables or anchor rods. A longitudinally extending groove 110 is formed on the top of the base 100, and the groove 110 has a circular or square cross-section. Multiple spaced first through holes are formed at the bottom of the groove 110, each penetrating the base 100 longitudinally. The first through holes are arranged in a ring or quincunx pattern at the bottom of the groove.

[0051] After being anchored to the geological body, the base 100 can withstand the weight load of the wind turbine generator set. Simultaneously, through the cooperation of the groove 110 and the first through hole, it provides an installation space 350 and a movement channel for the first damping mechanism 200. The first damping mechanism 200 is slidably installed within the groove 110. The first damping mechanism 200 can slide longitudinally relative to the base 100 within the groove 110. When longitudinal waves generated by an earthquake are transmitted through the geological body to the bottom of the first damping mechanism 200, the first damping mechanism 200 can absorb the longitudinal waves and generate a suitable amount of longitudinal displacement within the groove 110. Through the frictional damping between the first damping mechanism 200 and the inner wall of the groove 110, as well as the elastic deformation inside the first damping mechanism 200, the longitudinal wave energy transmitted by the geological body is effectively absorbed, preventing the longitudinal vibration from being directly transmitted to the wind turbine generator tower 500.

[0052] The second damping mechanism 300 is installed on top of the first damping mechanism 200, and a mounting position is formed on the top of the second damping mechanism 300. The mounting position is connected to the tower 500 of the wind turbine generator set through a flange connector. The second damping mechanism 300 is housed in a groove 110, and the outer peripheral surface of the second damping mechanism 300 slides in contact with the inner wall of the groove 110. When the geological body transmits transverse waves, the second damping mechanism 300 can receive the transverse vibration force from the geological body and slide in the horizontal direction, driving the tower 500 to generate a corresponding displacement in the horizontal direction. Through the sliding friction and damping effect between the second damping mechanism 300 and the inner wall of the groove 110, the vibration energy of the transverse wave is absorbed.

[0053] The basic damping structure of this application, through the cooperation of the first damping mechanism 200 and the second damping mechanism 300, can effectively absorb and attenuate longitudinal and transverse waves generated by earthquakes, respectively. The first damping mechanism 200 is directly in contact with the geological body and can perform primary absorption of longitudinal waves at the source of the earthquake, preventing the transmission of longitudinal vibration energy to the superstructure. The second damping mechanism 300 is located on top of the first damping mechanism 200 and is specifically responsible for handling transverse wave vibrations. It dissipates the transverse vibration energy by converting it into frictional heat energy or elastic potential energy through horizontal sliding or elastic deformation.

[0054] In this embodiment, by setting up a base 100, a first damping mechanism 200, and a second damping mechanism 300, during use, a groove 110 is formed in the base 100, the first damping mechanism 200 is installed in the groove 110, and the first damping mechanism 200 extends longitudinally downward to abut against the geological body. Simultaneously, the second damping mechanism 300 is installed on top of the first damping mechanism 200, and the tower 500 of the wind turbine is connected to the top of the second damping mechanism 300, thus completing the installation connection between the wind turbine and the foundation damping structure. When the base 100 receives longitudinal vibration transmitted from the geological body... When encountering longitudinal and transverse waves, the first damping mechanism 200 absorbs longitudinal waves and causes the second damping mechanism 300 and the tower 500 mounted on the second damping mechanism 300 to tend to slide longitudinally, thereby reducing the direct damage to the tower 500 caused by longitudinal waves. At the same time, the second damping mechanism 300 absorbs transverse waves, thereby reducing the direct damage to the tower 500 caused by transverse waves. Through the combined action of the first damping mechanism 200 and the second damping mechanism 300, the present invention can reduce the risk of damage to the foundation structure of the wind turbine generator set by earthquakes and improve the safety of the wind turbine generator set during operation.

[0055] In one embodiment, the first damping mechanism 200 includes a plurality of first dampers 210, a plurality of first damping elements 220, and a plurality of support blocks 230. The number of first dampers 210 is the same as the number of first through holes and they are arranged one-to-one. The bottom of each first damper 210 passes through the first through hole and slides longitudinally with the hole wall of the first through hole. The number of first damping elements 220 is the same as the number of first dampers 210 and they are sleeved on the outer periphery of the corresponding first damper 210. The first damping elements 220 are accommodated in the groove 110. The two ends of the first damping elements 220 are respectively connected to the second damping mechanism 300 and the bottom wall of the groove 110. The number of support blocks 230 is the same as the number of first dampers 210 and they are installed on the bottom of the first dampers 210. Each support block 230 can abut against the geological body.

[0056] Specifically, after the base 100 is anchored into the geological body, the multiple first through holes formed at the bottom of the groove 110 provide passageways for the first damper 210. The first damper 210 adopts a hydraulic damper or a pneumatic damper structure. Each first damper 210 forms a sliding fit with its corresponding through hole. The inner diameter of the first through hole is slightly larger than the outer diameter of the damping piston rod, which can maintain a fit clearance of 0.5mm-2mm, ensuring that the damping piston rod can smoothly slide longitudinally within the first through hole, while a sealing fit is achieved through a sealing ring.

[0057] The first damping element 220 is made of spring and is fitted onto the outer periphery of the first damper 210 in a corresponding manner. The first damping element 220 is completely accommodated within the groove 110. The upper end face of the first damping element 220 is connected to the bottom surface of the second damping mechanism 300, and the lower end face of the first damping element 220 is connected to the bottom wall of the groove 110. The connection method can be bolted, glued, or mechanically clamped. The first damping element 220 forms an elastic support structure between the first damper 210 and the groove 110. When the ground vibrates longitudinally, the first damping element 220 can undergo compressive or tensile deformation, absorbing vibration energy through elastic deformation.

[0058] The support blocks 230 are made of steel or cast iron and have a square or round plate-like structure. Each support block 230 is installed at one end of the first damper 210, extending downwards through a through hole, i.e., at the bottom end of the first damper 210. The support blocks 230 are fixed to the bottom end of the first damper 210 by threaded connection or welding. The bottom surface of the support blocks 230 is flat and can fully abut against the surface of the geological body, ensuring a stable contact relationship. Each support block 230 directly abuts against the surface of the geological body. When an earthquake generates longitudinal waves, the vibration force is first transmitted to the support block 230, and then transmitted to the first damper 210 through the damping piston rod.

[0059] The first damping mechanism 200, through the cooperation of the first damper 210, the first damping element 220, and the support block 230, absorbs and attenuates longitudinal waves. When the geological body vibrates longitudinally, the support block 230 receives the vibration force and drives the damping piston rod to reciprocate within the damping cylinder to dissipate the vibration energy. Simultaneously, the first damping element 220 undergoes elastic deformation during vibration, further absorbing vibration energy and providing restoring force, enabling the first damper 210 to return to its initial position. The two ends of the first damping element 220 are respectively connected to the second damping mechanism 300 and the bottom wall of the groove 110, forming a complete force transmission path to ensure that the vibration force can be effectively transmitted and absorbed.

[0060] In this embodiment, the sliding fit between the first damper 210 and the first through hole ensures that the first damping mechanism 200 can move stably longitudinally within the base 100, avoiding lateral swaying caused by excessive fit clearance. The sleeve structure of the first damping member 220 provides additional elastic support for the first damper 210, improving the overall damping effect. The direct contact between the support block 230 and the geological body ensures that the vibration force can be transmitted to the first damping mechanism 200 in a timely manner, achieving real-time response and absorption of longitudinal waves.

[0061] In one embodiment, the base 100 also has an installation channel 120 at its bottom, which is located below the groove 110. A partition plate 130 is provided between the groove 110 and the installation channel 120, forming the bottom of the groove 110. A first through hole is formed in the partition plate 130, and the bottom of the first damper 210 extends into the installation channel 120. The support block 230 is accommodated in the installation channel 120. The first damping mechanism 200 also includes a plurality of second damping members 240, which are accommodated in the installation channel 120. The number of second damping members 240 is the same as that of the first dampers 210, and they are fitted one-to-one on the outer periphery of the corresponding first dampers 210. The two ends of the second damping members 240 along the longitudinal direction are respectively connected to the partition plate 130 and the corresponding support block 230.

[0062] Specifically, after the base 100 is anchored into the geological body, a groove 110 is formed at the top of the base 100, and an installation channel 120 is formed at the bottom of the base 100. The groove 110 and the installation channel 120 form a layered cavity structure inside the base 100 by a partition plate 130. The groove 110 and the installation channel 120 are separated by the partition plate 130, which is the middle layer structure of the base 100. The partition plate 130 is cast using the same reinforced concrete material as the base 100. A first through hole is formed in the partition plate 130, that is, the first through hole actually penetrates the partition plate 130 longitudinally. The upper end of the first through hole opens into the bottom of the groove 110, and the lower end of the first through hole opens into the top of the installation channel 120. The first through hole provides a channel for the first damper 210 to extend from the groove 110 to the installation channel 120.

[0063] Preferably, the damping cylinder of the first damper 210 is located within the groove 110, and the downward-extending end of the first damper 210 is a damping piston rod. The damping cylinder passes through the first through hole on the partition plate 130 and extends into the mounting channel 120, while the damping piston rod is completely located within the mounting channel 120. The support block 230 is installed at the bottom end of the damping piston rod and is completely accommodated within the mounting channel 120. When the geological body experiences longitudinal vibration, the support block 230 can contact the surface of the geological body and transmit the vibration force.

[0064] The second damping element 240 is made of spring, and its inner diameter matches the outer diameter of the first damper 210. The second damping element 240 is completely accommodated within the mounting channel 120. The number of second damping elements 240 is the same as that of the first dampers 210, and they are fitted one-to-one on the outer periphery of the corresponding first dampers 210, specifically on the outer periphery of the damping cylinder and damping piston rod extending into the mounting channel 120. The upper end face of the second damping element 240 is connected to the lower surface of the partition plate 130, and the lower end face of the second damping element 240 is connected to the upper surface of the corresponding support block 230. The connection method is bolted connection, adhesive bonding, or vulcanized bonding.

[0065] The second damper 240 forms an independent elastic support unit within the installation channel 120. When the geomass vibrates longitudinally, the vibration force is transmitted to the second damper 240 through the support block 230. The second damper 240 undergoes compressive deformation, absorbing vibration energy through elastic deformation. The two ends of the second damper 240 are respectively connected to the partition plate 130 and the support block 230, forming a complete force transmission path. This ensures that the vibration force can be transmitted from the support block 230 to the partition plate 130, and then through the first damper 210 to the first damper 220 and the second damping mechanism 300 within the groove 110.

[0066] It can be further explained that a first damping element 220 is provided in the groove 110. The first damping element 220 is sleeved on the outer periphery of the damping cylinder of the first damper 210. The two ends of the first damping element 220 are respectively connected to the upper surface of the second damping mechanism 300 and the partition plate 130. A second damping element 240 is provided in the installation channel 120. The second damping element 240 is sleeved on the outer periphery of the damping piston rod of the first damper 210. The two ends of the second damping element 240 are respectively connected to the lower surface of the partition plate 130 and the support block 230. The first damping element 220 and the second damping element 240 form a series elastic support structure through the partition plate 130. When the ground generates longitudinal waves, the vibration force is transmitted to the second damping mechanism 300 in sequence through the support block 230, the second damping element 240, the partition plate 130, and the first damping element 220. During the transmission process, the second damping element 240 and the first damping element 220 respectively undergo elastic deformation to achieve multi-level absorption of vibration energy.

[0067] In this embodiment, by forming a layered structure of groove 110 and mounting channel 120 inside the base 100, a larger installation space 350 and movement stroke are provided for the first damping mechanism 200. The partition plate 130 divides the damping space into upper and lower layers. The groove 110 accommodates the main body of the first damper 210 and the first damping element 220, while the mounting channel 120 accommodates the extension of the first damper 210, the support block 230, and the second damping element 240, achieving a reasonable distribution of damping elements. The addition of the second damping element 240 provides additional elastic support to the first damping mechanism 200, forming a double elastic buffer structure with the first damping element 220, significantly improving the absorption effect of longitudinal seismic waves.

[0068] In one embodiment, the first damping mechanism 200 further includes a third damping member 250, which is housed within the mounting channel 120 and can slide longitudinally within the mounting channel 120. The third damping member 250 is connected to the bottom of all the support blocks 230.

[0069] Specifically, in addition to accommodating multiple support blocks 230 and multiple second damping components 240, the installation channel 120 also includes a third damping component 250. The third damping component 250 is made of an elastic material (such as natural rubber, synthetic rubber, or polyurethane elastomer), and has a rectangular or circular flat plate structure. The planar dimensions of the third damping component 250 match the bottom dimensions of the installation channel 120. The third damping component 250 is completely contained within the installation channel 120 and is located below all the support blocks 230, forming a unified load-bearing platform.

[0070] The third damping element 250 can slide longitudinally within the mounting channel 120. A sliding fit is formed between the outer peripheral edge of the third damping element 250 and the inner wall of the mounting channel 120, ensuring smooth longitudinal movement of the third damping element 250 within the mounting channel 120. Preferably, the inner wall of the mounting channel 120 is provided with a longitudinal guide groove (not shown in the figure), and the outer peripheral edge of the third damping element 250 is provided with a guide protrusion (not shown in the figure) that mates with the guide groove. The guide protrusion is embedded in the guide groove and can slide along the guide groove, preventing lateral displacement or rotation of the third damping element 250 during sliding.

[0071] The third damping component 250 is connected to the bottom of all support blocks 230 by bolts or welding. Each support block 230 has a connecting hole on its bottom surface, and the upper surface of the third damping component 250 has corresponding threaded holes. Each support block 230 is fixed to the upper surface of the third damping component 250 by bolts. The third damping component 250 acts as a unified load-bearing base plate, integrating all support blocks 230 into a single moving unit. When the geomagnetic body vibrates longitudinally, the vibration force is simultaneously transmitted to all support blocks 230, enabling synchronous movement of each support block 230 through the third damping component 250, thus preventing asynchronous vibration responses between the support blocks 230.

[0072] Since the third damping element 250 is installed at the bottom of all support blocks 230, it plays a role in the unified distribution and transmission of vibration force in the first damping mechanism 200. When an earthquake generates longitudinal waves, the vibration of the geological body is first transmitted to the third damping element 250, which slides longitudinally within the installation channel 120, causing all support blocks 230 to move synchronously. Each support block 230 transmits the vibration force to the groove 110 through the corresponding first damper 210. The damping cylinder of the first damper 210 generates a corresponding longitudinal displacement within the groove 110, simultaneously compressing or stretching the first damping element 220 to dissipate the longitudinal waves.

[0073] The bottom surface of the third damper 250 is in direct contact with the geological mass. The contact area of ​​the third damper 250 is at least the sum of the contact areas of all the support blocks 230, ensuring sufficient contact with the geological mass. The bottom surface of the third damper 250 is provided with anti-slip texture or rubber padding to enhance friction with the geological mass and prevent slippage during vibration. The material selection for the third damper 250 must consider corrosion resistance and wear resistance to ensure reliability in long-term underground installation.

[0074] More specifically, the third damping component 250 adopts a segmented structure, comprising multiple sub-plates connected by flexible connectors made of rubber or elastic metal. This segmented third damping component 250 can adapt to uneven geological surfaces, improving its fit with the geological body. A buffer layer made of polyurethane foam is provided on the upper surface of the third damping component 250, providing additional cushioning protection for the support block 230.

[0075] Of course, in order to prevent soil or water from entering the installation channel 120 and causing damage to the installation channel 120, the ground needs to be hardened and waterproofed, and the base 100 should also be a waterproof base 100.

[0076] In this embodiment, the third damping element 250 integrates the originally dispersed multiple support blocks 230 into a unified vibration receiving and transmission unit, achieving uniform distribution and synchronous transmission of vibration force. The sliding movement of the third damping element 250 within the installation channel 120 provides a unified motion reference for the entire first damping mechanism 200, avoiding uncoordinated movement between the various first dampers 210. The large-area contact between the third damping element 250 and the geological body enables more effective reception of longitudinal waves generated by earthquakes, improving the transmission efficiency of vibration force.

[0077] In one embodiment, the second damping mechanism 300 includes a mounting plate 310, a damping component 340, a mounting base 360, and a cover plate 370. The mounting plate 310 is mounted on the top of the first damping mechanism 200. The mounting plate 310 can slide longitudinally with the inner wall of the groove 110. A mounting groove 320 is formed on the top of the mounting plate 310. The bottom of the mounting groove 320 is recessed longitudinally to form a sliding groove 330. The damping component 340 is installed in the mounting groove 320. A mounting space 350 communicating with the sliding groove 330 is formed at the center of the damping component 340. The mounting space 350 extends longitudinally through the damping component 340. The mounting base 360 ​​is installed in the mounting space 350. A mounting position is formed on the top of the mounting base 360. Mounting base 360 ​​abuts against damping component 340, and the bottom of mounting base 360 ​​extends downward into sliding groove 330. When the base 100 receives transverse waves, the waves are transmitted to damping component 340 through mounting plate 310. The damping component 340 deforms in the horizontal direction and absorbs the transverse waves. When there is no excess transverse wave, the damping component 340 can push mounting base 360 ​​to slide along sliding groove 330. Cover plate 370 is installed on top of mounting plate 310 and covers mounting base 360 ​​in mounting space 350. A longitudinal hole communicating with mounting space 350 is formed at the center of cover plate 370. Tower 500 can slide through longitudinal hole in the longitudinal direction, and mounting base 360 ​​can slide in the horizontal direction relative to cover plate 370.

[0078] Specifically, the second damping mechanism 300 is installed on top of the first damping mechanism 200, specifically on the upper end face of the first damping element 220 within the first damping mechanism 200. The mounting plate 310 is made of steel plate or cast iron and has a circular or square flat plate structure. The planar dimensions of the mounting plate 310 match the opening dimensions of the groove 110. The mounting plate 310 can slide longitudinally within the groove 110, and a sliding fit is formed between the outer peripheral edge of the mounting plate 310 and the inner wall of the groove 110. This ensures that the mounting plate 310 can move longitudinally along with the first damping mechanism 200 while providing a stable mounting foundation for the second damping mechanism 300.

[0079] The top of the mounting plate 310 has a mounting groove 320, which is a circular or square recessed structure. The bottom of the mounting groove 320 is recessed longitudinally to form a sliding groove 330, which is a circular cavity and provides horizontal sliding space for the mounting base 360. The inner wall surface of the sliding groove 330 is precision machined to ensure smooth sliding of the mounting base 360 ​​within the sliding groove 330.

[0080] The damping component 340 is installed within the mounting groove 320. A longitudinally penetrating mounting space 350 is formed at the center of the damping component 340, which communicates with the sliding groove 330, providing an installation position and movement space for the mounting base 360. A mounting position is formed on the top of the mounting base 360, which is a flange connection or a threaded connection structure, and is connected to the bottom of the wind turbine tower 500. The mounting base 360 ​​abuts against the damping component 340. When the geomagnetic body transmits lateral waves, the mounting base 360 ​​displaces in the horizontal direction, causing the damping component 340 to undergo elastic deformation and provide restoring force.

[0081] The bottom of the mounting base 360 ​​extends downward into the sliding groove 330, and the sliding section and the sliding groove 330 form a sliding fit relationship. When receiving a transverse wave, the damping component 340 can push the mounting base 360 ​​to slide along the sliding groove 330. When the transverse wave acts on the damping component 340, the elastic element deforms in the horizontal direction, and the deformation force is transmitted to the mounting base 360, pushing the mounting base 360 ​​to slide horizontally within the sliding groove 330. The sliding direction is consistent with the propagation direction of the transverse wave, and the sliding stroke is within the length of the sliding groove 330.

[0082] A cover plate 370 is placed on top of the mounting plate 310. The cover plate 370 is made of steel plate and is fixed to the top surface of the mounting plate 310 by bolts or welding. A longitudinal hole communicating with the mounting space 350 is formed at the center of the cover plate 370. The diameter of the longitudinal hole is slightly larger than the outer diameter of the tower 500. The tower 500 slidably passes through the longitudinal hole. When the mounting base 360 ​​slides in the horizontal direction, the tower 500 moves with the mounting base 360. The gap between the tower 500 and the longitudinal hole allows the tower 500 to make horizontal displacement within a certain range.

[0083] The cover plate 370 encloses the mounting base 360 ​​within the installation space 350, forming a closed damping cavity to prevent external debris from entering the installation space 350 and affecting the sliding of the mounting base 360. The mounting base 360 ​​can slide relative to the cover plate 370. The connecting section of the mounting base 360 ​​can move horizontally within the installation space 350. The top mounting position of the mounting base 360 ​​is connected to the external tower 500 through a longitudinal hole, enabling synchronous movement between the tower 500 and the mounting base 360. The cover plate 370 is provided with a lubricating oil inlet and a vent. The lubricating oil inlet is used to inject lubricating oil into the installation space 350 to reduce friction between the mounting base 360 ​​and the damping assembly 340. The vent is used to expel air from the installation space 350 to prevent air pressure changes from affecting the movement of the mounting base 360.

[0084] In this embodiment, the connection between the mounting plate 310 and the first damping mechanism 200 ensures that the second damping mechanism 300 can follow the first damping mechanism 200 in longitudinal movement, while providing a stable base platform for lateral damping. The damping component 340 absorbs lateral vibration energy through the elastic deformation of the elastic unit, and the sliding movement of the mounting base 360 ​​within the sliding groove 330 converts lateral vibration into controllable displacement movement. The closed structure of the cover plate 370 protects the internal damping component 340 from environmental influences, ensuring long-term stable operation.

[0085] In one embodiment, a plurality of slots 390 are formed circumferentially on the inner wall of the mounting groove 320; the damping component 340 includes a plurality of elastic strips 341 and a plurality of damping elements 342, any two adjacent slots 390 are respectively engaged with the two ends of an elastic strip 341 so that all the elastic strips 341 enclose the mounting space 350, the number of damping elements 342 is the same as the number of elastic strips 341 and is arranged one-to-one on the side of the corresponding elastic strip 341 away from the mounting space 350, and the two ends of each damping element 342 are respectively connected to the inner wall of the mounting groove 320 and the corresponding elastic strip 341.

[0086] Specifically, the inner wall of the mounting groove 320 protrudes inward to form a plurality of snap-fit ​​pieces 380 that are spaced apart along the circumferential direction of the mounting groove 320. The number of snap-fit ​​pieces 380 is the same as the number of spring strips 341, and each snap-fit ​​piece 380 has two symmetrically arranged snap-fit ​​grooves 390.

[0087] The mounting groove 320 at the top of the mounting plate 310 provides mounting space 350 for the shock absorber assembly 340. Multiple spaced-apart snap-fit ​​members 380 are formed on the inner wall of the mounting groove 320. The snap-fit ​​members 380 are typically integrally formed with the mounting plate 310. The snap-fit ​​members 380 are spaced circumferentially, and preferably there are three snap-fit ​​members 380. The included angles between each snap-fit ​​member 380 are equal to ensure the symmetry and stability of the shock absorber assembly 340.

[0088] Each snap-fit ​​component 380 has two symmetrically distributed snap-fit ​​slots 390, the dimensions of which match the cross-sectional dimensions of the spring clip 341. The two snap-fit ​​slots 390 are located on opposite sides of the snap-fit ​​component 380, with their openings facing each other, forming a symmetrical snap-fit ​​structure. The snap-fit ​​slots 390 communicate with the mounting groove 320, and the bottom of the snap-fit ​​slot 390 is in contact with the inner wall of the mounting groove 320, ensuring that the spring clip 341 can snap into the snap-fit ​​slot 390 from inside the mounting groove 320. The slot 390 should include a slot opening, a receiving slot, and a fixing slot connected in sequence. The slot opening is connected to the installation space 350. The receiving slot is located between the fixing slot and the slot opening, and the outer side of the receiving slot wall has an arc transition. The fixing slot is gradually widened in the direction from the outer wall of the installation space 350 of the mounting plate 310. With this arrangement, the present invention can stably engage the spring strip 341 in the slot 390, ensuring the connection stability between the spring strip 341 and the mounting plate 310.

[0089] The damping assembly 340 includes multiple spring strips 341 and multiple damping elements 342. The spring strips 341 are made of spring steel and have a strip or plate-shaped structure. Each spring strip 341 includes an arc-shaped segment and snap-fit ​​segments located at both ends of the arc-shaped segment. The arc direction of the arc-shaped segment is preferably outward. The number of spring strips 341 and snap-fit ​​elements 380 is the same. When there are 3 snap-fit ​​elements 380, there are also 3 spring strips 341, achieving a one-to-one correspondence configuration.

[0090] Both ends of the spring clip 341 are respectively engaged in a slot 390. Specifically, one end of the spring clip 341 is engaged in a slot 390 of a certain engaging member 380, and the other end of the spring clip 341 is engaged in a slot 390 of an adjacent engaging member 380. A snap-fit ​​relationship is formed between the spring clip 341 and the slot 390. The end of the spring clip 341 is provided with a snap-fit ​​protrusion or snap-fit ​​groove, which matches the shape of the slot 390 to prevent the spring clip 341 from coming out of the slot 390 under force. All the spring clips 341 are sequentially engaged with all the slots 390 to form an installation space 350. The spring clips 341 are connected in circumferential order to form a closed polygonal structure. The interior space of the polygon is the installation space 350, and the shape of the installation space 350 is roughly triangular.

[0091] Each damping element 342 has its two ends connected to the inner wall of the mounting groove 320 and the corresponding elastic strip 341, respectively. One end of the damping element 342 is fixed to the inner wall of the mounting groove 320 by bolts or adhesive bonding, and the other end of the damping element 342 is connected to the outer surface of the corresponding elastic strip 341. When a transverse wave acts on the damping assembly 340, the damping element 342 dissipates the transverse wave through its own damping effect. Any wave that is not completely dissipated is eliminated by the deformation of the elastic strip 341. During the deformation process, the elastic strip 341 pushes the mounting base 360 ​​to move, and ultimately, through the combined action of all the damping assemblies 340, the transverse wave is completely eliminated, ensuring the safety of the wind turbine generator.

[0092] In this embodiment, the connecting section of the mounting base 360 ​​is located within the mounting space 350 enclosed by the elastic strips 341, and the mounting base 360 ​​abuts against the inner surface of each elastic strip 341. When an earthquake generates lateral waves, the lateral vibration force is transmitted to the mounting plate 310, which then transmits it to the damping element 342. The damping element 342 dissipates the lateral waves through its own damping effect. The portion that the damping element 342 fails to dissipate is transmitted to the corresponding elastic strip 341, which deforms and pushes the mounting base 360 ​​to move, so that the remaining elastic strips 341 and the damping element 342 work together to ultimately eliminate the lateral waves and achieve effective control of lateral vibration. The sliding motion of the mounting base 360 ​​within the sliding groove 330, combined with the elastic deformation of the elastic strips 341, provides multiple layers of lateral vibration damping protection for the tower 500.

[0093] In one embodiment, each damping element 342 includes a plurality of second dampers 343, which are distributed at intervals along the circumference of the mounting groove 320, and the two ends of each second damper 343 are respectively connected to the inner wall of the mounting groove 320 and the corresponding elastic bar 341.

[0094] Specifically, the damping element 342 employs a second damper 343 to achieve its damping function. The second damper 343 and the first damper 210 cooperate structurally and functionally to form a complete damping system. Multiple second dampers 343 are distributed circumferentially at intervals. More specifically, each spring bar 341 is preferably configured with at least three second dampers 343, which are distributed circumferentially at intervals on the same horizontal plane. Each second damper 343 is located outside the corresponding spring bar 341, and the axial direction of the second damper 343 is parallel to the length direction of the spring bar 341, ensuring that the second damper 343 can effectively respond to the deformation movement of the spring bar 341.

[0095] Each second damper 343 has its two ends connected to the inner wall of the mounting groove 320 and the corresponding elastic strip 341, respectively. One end of the second damper 343 is fixed to the inner wall of the mounting groove 320 via a connecting seat, which is fixed to the inner wall of the mounting groove 320 by bolting or welding. The other end of the second damper 343 is connected to the corresponding elastic strip 341 via a connecting rod. The connecting rod adopts a ball joint or universal joint structure, allowing the second damper 343 to make slight angle adjustments when the elastic strip 341 deforms. The connection point between the second damper 343 and the elastic strip 341 is located at the middle of the elastic strip 341, ensuring that the second damper 343 can detect the deformation of the elastic strip 341 to the maximum extent.

[0096] When the mounting base 360 ​​is subjected to a lateral force within the mounting space 350, the mounting base 360 ​​pushes the elastic strip 341 in contact with it to bend and deform. The deformation of the elastic strip 341 causes the second damper 343 connected to it to produce a corresponding extension and retraction movement. The damping piston of the second damper 343 moves within the damping cylinder, and the damping fluid generates a damping force through the throttling orifice. The damping force and the elastic restoring force of the elastic strip 341 work together to control the lateral vibration.

[0097] The second damper 343 is equipped with a temperature compensation device. When the ambient temperature changes, the temperature compensation device automatically adjusts the viscosity of the damping fluid to maintain the stability of the damping performance. The outer shell of the second damper 343 is made of stainless steel or aluminum alloy, which has good corrosion resistance and sealing performance.

[0098] In this embodiment, the circumferentially distributed configuration of the second dampers 343 provides all-around damping support for the damping assembly 340. The one-to-one connection between the second dampers 343 and the elastic strips 341 ensures that each elastic unit has independent damping control capability. The second dampers 343 form a damping bridge between the inner wall of the mounting groove 320 and the elastic strips 341, converting the elastic deformation of the elastic strips 341 into controllable damping energy dissipation, significantly improving the absorption effect of the damping assembly 340 on lateral vibrations. The adjustable damping characteristics of the second dampers 343 enable the damping system to adapt to seismic lateral waves of different intensities and frequencies, providing precise vibration control.

[0099] In one embodiment, the mounting base 360 ​​includes an integrally formed sliding section and a mounting section. The top of the mounting section forms a mounting position, and the mounting section abuts against all the elastic strips 341. The sliding section is located below the mounting section and extends downward into the sliding groove 330. An elastic damping material 344 is filled between the sliding section and the inner wall of the sliding groove 330.

[0100] Specifically, the mounting base 360 ​​adopts a one-piece molded structure, with the sliding section and mounting section formed as a single unit through casting or machining. Made of high-strength steel or aluminum alloy, the one-piece molded structure of the mounting base 360 ​​avoids the loosening or stress concentration problems that may occur with split connections, thus improving the structural strength and service life of the mounting base 360. The one-piece molding process ensures a seamless connection between the sliding section and the mounting section, eliminating stress abrupt changes at the connection interface and enhancing the reliability of the mounting base 360 ​​under complex loads.

[0101] The sliding section is located below the mounting section. The sliding section has a cylindrical or square-column structure, and its shape matches the inner shape of the sliding groove 330. The mounting section is located above the sliding section. The cross-sectional dimensions of the mounting section are larger than those of the sliding section. The mounting section and the sliding section are connected by a transition section, which uses a circular arc transition or a conical transition structure to avoid stress concentration caused by abrupt changes in cross-section. The upper end of the mounting section forms the mounting position, which uses a flange connection or a threaded connection structure to connect to the bottom flange of the wind turbine tower 500.

[0102] The sliding section is located within the sliding groove 330, forming a sliding fit with the sliding groove 330 to ensure smooth horizontal sliding within the sliding groove 330. The outer surface of the sliding section is precision-machined to reduce frictional resistance during sliding. Lubrication grooves are provided on the sliding section, arranged in a spiral or annular shape, and filled with grease to provide lubrication for the relative movement between the sliding section and the sliding groove 330.

[0103] When an earthquake generates lateral waves, the lateral vibration force is transmitted through the tower 500 to the mounting base 360, causing horizontal displacement of the mounting base 360. The mounting section pushes the elastic strip 341 in contact with it, causing elastic deformation, while the sliding section simultaneously slides within the sliding groove 330. The contact between the mounting section and the elastic strip 341 provides horizontal elastic support for the mounting base 360, and the sliding of the sliding section within the sliding groove 330 provides the mounting base 360 ​​with horizontal freedom of movement.

[0104] The sliding groove 330 is filled with elastic damping material 344, which is made of polyurethane foam, rubber, or silicone. The elastic recovery performance and damping characteristics of the elastic damping material 344 can provide buffer protection and vibration absorption during the movement of the sliding section.

[0105] Elastic damping material 344 surrounds the outer periphery of the sliding section, and is in close contact with the outer surface of the sliding section and the inner wall of the sliding groove 330, forming a continuous elastic buffer layer. When the sliding section moves within the sliding groove 330, the elastic damping material 344 undergoes compression or tension deformation. This deformation absorbs the impact energy during the movement of the sliding section and provides a restoring force, allowing the sliding section to return to its initial position after vibration stops. The surrounding configuration of the elastic damping material 344 eliminates direct contact between the sliding section and the sliding groove 330, avoiding noise and wear caused by rigid metal-to-metal collisions.

[0106] In one embodiment, the basic damping structure further includes an anti-tipping mechanism 400 installed on the top of the base 100. The anti-tipping mechanism 400 is hinged to the groove wall of the groove 110, and the top of the anti-tipping mechanism 400 is hinged to the tower 500.

[0107] Specifically, the anti-tipping mechanism 400, as an important component of the basic vibration damping structure, is installed on the top of the base 100 and works in conjunction with the first vibration damping mechanism 200 and the second vibration damping mechanism 300 to provide comprehensive stability protection for the wind turbine generator. The top of the base 100 is equipped with an installation platform for the anti-tipping mechanism 400. The installation platform has a ring-shaped or square structure, and its inner diameter matches the opening size of the groove 110, providing a stable installation foundation for the anti-tipping mechanism 400.

[0108] The anti-tipping mechanism 400 includes multiple third dampers 410 and multiple fourth damping components 420. The multiple third dampers 410 are distributed circumferentially at intervals on the top of the base 100, and both ends of each third damper 410 are hinged to the base 100 and the tower 500, respectively. The number of fourth damping components 420 is the same as the number of third dampers 410, and each one is fitted onto the outer periphery of the corresponding third damper 410. Each fourth damping component 420 is preferably made of spring. The two ends of the fourth damping component 420 are respectively connected to the bottom of the damping cylinder body and the top of the damping piston rod of the corresponding third damper 410. Through this connection method, the corresponding third damper 410 can have a reset function.

[0109] In this embodiment, the hinged configuration of the anti-tipping mechanism 400 provides reliable overturning protection for the wind turbine generator set. The hinged connection between the anti-tipping mechanism 400 and the base 100 and the tower 500 achieves an organic combination of rigid constraint and flexible adaptation. The hinged connection of the anti-tipping mechanism 400 to the groove wall of the groove 110 provides a stable support foundation, and the hinged connection with the tower 500 ensures that the anti-tipping mechanism 400 can effectively respond to the movement state of the tower 500. The coordinated configuration of the anti-tipping mechanism 400, the first damping mechanism 200, and the second damping mechanism 300 forms a three-dimensional protection system. The first damping mechanism 200 and the second damping mechanism 300 are responsible for vibration absorption and attenuation, while the anti-tipping mechanism 400 is responsible for overturning prevention and control.

[0110] Based on the same technical concept, in a second aspect, the present invention also proposes a construction method for a foundation damping structure of a wind turbine generator set, used for constructing the foundation damping structure described in the first aspect;

[0111] The construction method includes the following steps:

[0112] S100. Excavation work is carried out in the pre-set construction area to form a construction pit; wherein the geological body at the bottom of the construction pit is a rock layer.

[0113] Specifically, in this embodiment, when constructing the foundation damping structure, excavation is first carried out in the pre-set construction area (usually the area where the wind turbine tower foundation is located) to form a construction pit.

[0114] During excavation operations, earthwork excavation can be carried out sequentially within the construction area according to pre-set excavation data. It should be specifically and clearly stated that, in this embodiment, the example excavation data includes the excavation location of the construction pit, the excavation depth, and the excavation slope and slope stability angle of each excavation face.

[0115] More specifically, during the excavation of the construction pit, the excavation depth should ensure that the bottom of the pit reaches a stable rock layer, thereby enabling the present invention to obtain a stable and reliable foundation bearing structure. Currently, during the excavation of the pit, it is also necessary to ensure the stability of the pit slope formed by the excavation, that temporary support structures are set up around the pit, and that all excavated surfaces are treated with slope protection.

[0116] The bottom of the construction pit is a rock layer, including hard rocks such as granite, limestone, or sandstone. After excavating to the rock layer, the surface needs to be cleaned and leveled, and loose rock fragments and weathered layers need to be removed. The surface of the rock layer also needs to be roughened to enhance the bond strength between the subsequent concrete and the rock layer.

[0117] S200. Reinforced concrete is poured in the construction pit to form the base; wherein the bottom of the base is anchored in the rock layer.

[0118] Specifically, in this step, when pouring reinforced concrete in the construction pit, steel mesh of the corresponding specifications can be installed in the pit according to the structural dimensions and load-bearing requirements of the base. This installation method ensures that the base has sufficient tensile and bending strength after pouring.

[0119] S300, install the first shock absorption mechanism and the second shock absorption mechanism in sequence.

[0120] Specifically, in this step, when installing the damping mechanism, the first damping mechanism can be installed first. The first damping mechanism is installed in the groove of the base. Before installation, the dimensions of the groove need to be checked to ensure that the first damping mechanism can be accurately installed in place. The first damping mechanism includes a first damper and an elastic support. The first damper is fixed to the bottom of the groove by bolts, and the elastic support is installed above the first damper.

[0121] After the first shock absorption mechanism is installed, a functional test needs to be conducted to test whether the damping characteristics of the first damper and the elastic characteristics of the elastic support meet the design requirements.

[0122] The second damping mechanism is then installed on a mounting plate on top of the base. This second damping mechanism includes components such as a mounting groove, snap-fit ​​connectors, spring clips, a second damper, and a mounting base. The snap-fit ​​connectors are installed on the inner wall of the mounting groove, and their positions should be accurately positioned according to the design drawings.

[0123] The spring clip is installed in the slot of the snap-fit ​​connector, with both ends snapped into the slots of adjacent snap-fit ​​connectors to form an enclosed installation space. During installation, the spring clip should be in its natural state, without any pre-stress or pre-deformation. The second damper is installed on the outside of the spring clip, with one end connected to the inner wall of the mounting groove and the other end connected to the corresponding spring clip. The installation of the second damper should ensure that its axis is aligned with the deformation direction of the spring clip.

[0124] The mounting base is installed within the installation space enclosed by the elastic strip. The sliding section of the mounting base is inserted into the sliding groove, and elastic damping material is filled between the sliding section and the sliding groove. After the mounting base is installed, a sliding test is required to ensure that the mounting base can slide smoothly within the sliding groove.

[0125] S400. Backfill sand and gravel into the pit around the base and compact it to form the foundation shock absorption structure.

[0126] Specifically, in this step, when backfilling within the foundation pit, well-graded sand and gravel materials can be used. The backfill materials include coarse sand, fine sand, and crushed stone, and the gradation of the backfill materials should meet relevant standard requirements.

[0127] Backfilling is carried out in layers, and compaction is performed using a road roller or tamper during the backfilling process. Care should be taken to protect the installed vibration damping mechanisms during backfilling to prevent damage from the backfill material.

[0128] After backfilling is completed, the surface of the foundation pit should be flush with the surrounding ground, and the surface slope should meet drainage requirements. The surface of the backfilled area also needs to be hardened by laying a concrete or asphalt surface layer to ensure the stability and durability of the backfilled area.

[0129] This allows the present invention to ensure a stable anchoring connection between the foundation damping structure and the ground, increasing the contact area and anchoring stability between the foundation damping structure and the geological body. It should be further clarified that the anchoring material used in this embodiment is preferably high-strength cement mortar or epoxy resin anchoring agent used for anchoring reinforcement.

[0130] This invention ensures the construction quality and performance of the foundation damping structure through a scientifically sound construction process. The excavation pit, reaching the rock layer, provides a stable load-bearing foundation for the base, while the anchoring connection of the reinforced concrete base guarantees the overall stability of the foundation structure. The precise installation of the first and second damping mechanisms ensures the functionality of the damping system, and the backfilling and compaction process provides a favorable working environment for the entire damping structure. Compared to traditional foundation construction methods, the construction process employed in this invention effectively guarantees the construction accuracy and functional performance of the foundation damping structure, providing reliable damping protection for wind turbine generators and significantly improving the safety and stability of wind turbine generators in seismic environments.

[0131] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A foundation vibration damping structure for a wind turbine generator set, characterized in that, include: The base is anchorable to the geological body. The top of the base has a groove extending downward in the longitudinal direction, and the bottom of the groove has a plurality of spaced first through holes, each of which penetrates the bottom of the groove in the longitudinal direction. A first damping mechanism is installed in the groove and at least partially passes through all the first through holes and extends downward, and abuts against the geological body. The first damping mechanism is capable of sliding longitudinally relative to the base within the groove and absorbing longitudinal waves transmitted by the geological body. as well as, The second damping mechanism is housed in the groove and installed on top of the first damping mechanism. The top of the second damping mechanism has a mounting position connected to the tower of the wind turbine. The second damping mechanism can slide longitudinally with the inner wall of the groove. When receiving transverse waves transmitted by the geological body, the second damping mechanism can drive the tower to slide horizontally. The second shock absorption mechanism includes: The mounting plate is installed on the top of the first shock absorption mechanism. The mounting plate can slide longitudinally with the inner wall of the groove. The top of the mounting plate forms a mounting groove, and the bottom of the mounting groove is recessed longitudinally to form a sliding groove. A shock-absorbing component is installed in the mounting groove, and a mounting space communicating with the sliding groove is formed at the center of the shock-absorbing component, the mounting space extending longitudinally through the shock-absorbing component; A mounting base is installed within the installation space. The top of the mounting base forms the mounting position. The mounting base abuts against the damping assembly, and the bottom of the mounting base extends downward into the sliding groove. When the base receives the lateral wave, it transmits the signal to the damping assembly via the mounting plate. The damping assembly deforms horizontally and absorbs the lateral wave. When the lateral wave has no remaining clearance, the damping assembly can push the mounting base to slide along the sliding groove. A cover plate is installed on top of the mounting plate and covers the mounting base within the mounting space. A longitudinal hole communicating with the mounting space is formed at the center of the cover plate. The tower can slide longitudinally through the longitudinal hole, and the mounting base can slide horizontally relative to the cover plate. Multiple slots are formed at intervals along the circumference of the inner wall of the mounting groove; The shock absorption components include: Multiple elastic bars, with any two adjacent slots engaging with both ends of one of the elastic bars, so that all the elastic bars enclose the mounting space; and, Multiple damping elements are provided, the number of which is the same as the number of spring bars and they are arranged one-to-one on the side of the corresponding spring bar away from the installation space. The two ends of each damping element are respectively connected to the inner wall of the installation groove and the corresponding spring bar.

2. The foundation vibration damping structure of the wind turbine generator set as described in claim 1, characterized in that, The first shock absorption mechanism includes: Multiple first dampers are provided, the number of first dampers being the same as the number of first through holes and arranged in a one-to-one correspondence. The bottom of each first damper passes through the first through hole and slides longitudinally with the hole wall of the first through hole. Multiple first damping components, the number of which corresponds to the number of first dampers and are fitted one-to-one onto the outer periphery of the corresponding first dampers, are housed within the groove, and both ends of the first damping components are respectively connected to the second damping mechanism and the bottom wall of the groove; and, Multiple support blocks are provided, the number of which is the same as the number of the first dampers and they are installed one-to-one at the bottom of the first dampers. Each support block can abut against the geological body.

3. The foundation vibration damping structure of the wind turbine generator set as described in claim 2, characterized in that, The base also has an installation channel at its bottom, which is located below the groove. A partition plate is provided between the groove and the installation channel, forming the bottom of the groove. The first through hole is formed in the partition plate, and the bottom of the first damper extends into the installation channel. The support block is accommodated in the installation channel. The first damping mechanism further includes a plurality of second damping components, which are housed in the installation channel. The number of second damping components is the same as that of the first damper, and they are fitted one-to-one on the outer periphery of the corresponding first damper. The two ends of the second damping components along the longitudinal direction are respectively connected to the partition plate and the corresponding support block.

4. The foundation vibration damping structure of the wind turbine generator set as described in claim 3, characterized in that, The first damping mechanism further includes a third damping element, which is housed within the mounting channel and can slide longitudinally within the mounting channel. The third damping element is connected to the bottom of all the support blocks.

5. The foundation vibration damping structure of the wind turbine generator set as described in claim 1, characterized in that, Each of the damping components includes a plurality of second dampers, which are distributed at intervals along the circumference of the mounting groove, and the two ends of each second damper are respectively connected to the inner wall of the mounting groove and the corresponding elastic bar.

6. The foundation vibration damping structure of the wind turbine generator set as described in claim 5, characterized in that, The mounting base includes an integrally formed sliding section and a mounting section. The top of the mounting section forms the mounting position. The mounting section abuts against all the elastic bars. The sliding section is located below the mounting section and extends downward into the sliding groove. Elastic damping material is filled between the sliding section and the inner wall of the sliding groove.

7. The foundation vibration damping structure of the wind turbine generator set as described in any one of claims 1 to 5, characterized in that, The basic shock absorption structure also includes an anti-tipping mechanism installed on the top of the base. The anti-tipping mechanism is hinged to the groove wall of the groove, and the top of the anti-tipping mechanism is hinged to the tower.

8. A construction method for a foundation vibration damping structure of a wind turbine generator set, characterized in that, Used for constructing a foundation damping structure as described in any one of claims 1 to 7; The construction method includes the following steps: Excavation work is carried out in the pre-designated construction area to form a construction pit; wherein the geological body at the bottom of the construction pit is a rock layer; Reinforced concrete is poured inside the construction pit to form the base; wherein the bottom of the base is anchored within the rock layer. The first shock absorber and the second shock absorber are installed sequentially. Sand and gravel are backfilled into the pit and compacted around the base to form the foundation shock-absorbing structure.

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