Three-section fan universal elastic damping support structure

Abstract

The utility model discloses a three -segment formula fan universal elasticity damping support structure belongs to wind power generation equipment technical field, and this structure includes front support shock absorption, middle part side limit shock absorption and rear support shock absorption, and rear support shock absorption is as main bearing and core buffer unit, and through columnar buffer unit realizes the multidirectional flexible hinging between main bearing girder and lower platform, mainly absorbs front and back, left and right and around the shaft torsional vibration, and front support shock absorption is located in the girder body front part, provides vertical direction buffer and assists limit, and middle part side limit shock absorption is symmetrically arranged in the both sides of girder body, is used for limiting main bearing girder horizontal transverse displacement and buffering lateral vibration, and three -segment module is partitioned and is laid out in space, and works in cooperation, and jointly constitutes an omnidirectional elastic restraint system, effectively attenuates the multidimensional vibration produced in the operation of fan, blocks the transmission path of vibration energy to tower, alleviates the stress concentration of connecting part, promotes the stability of fan whole operation, structural safety and service life.

Description

Technical Field

[0001] This utility model belongs to the field of wind power equipment structure technology, specifically relating to a composite vibration damping support device installed between the main load-bearing beam and the lower platform of a wind turbine generator set. This structure is particularly suitable for suppressing multi-dimensional vibrations caused by rotor rotation, aerodynamic load fluctuations, and transmission chain operation, aiming to improve the unit's operational stability, structural safety, and overall service life. Background Technology

[0002] In megawatt-class wind turbine generators, the main load-bearing beam (usually the main frame or drivetrain support beam) is a key component that transfers the rotor load to the tower. During operation, the main load-bearing beam is subjected to complex front-to-back, up-and-down, left-to-right, and torsional vibrations around its axis due to wind shear, tower shadow effect, yaw motion, and drivetrain torque fluctuations.

[0003] The current mainstream support solutions have the following limitations: 1. Rigid Connection Scheme: The main load-bearing beam is rigidly connected to the lower platform via flanges or welding. Although this method has a strong load-bearing capacity, it transmits vibrations to the tower foundation without attenuation, leading to fatigue of the tower welds, loosening of bolts, and fretting wear of the foundation, significantly shortening the structural life.

[0004] 2. Single-dimensional elastic support scheme: Rubber pads or spring isolators are only installed in the vertical direction. This type of design has a certain buffering effect on vertical vibration, but it has almost no ability to suppress horizontal thrust and torsional loads, and is prone to beam instability due to insufficient stiffness in the non-support direction.

[0005] 3. Stress concentration at the connection: Under alternating loads, traditional connection methods are prone to high stress concentration at the connection interface, which becomes a dangerous source for the initiation of fatigue cracks.

[0006] Therefore, there is an urgent need to develop an integrated vibration damping support structure that can achieve omnidirectional elastic constraint in space, efficiently dissipate vibration energy, and alleviate connection stress. Utility Model Content

[0007] The purpose of this invention is to overcome the problems of direct vibration transmission, significant stress concentration, and insufficient multidimensional vibration suppression in the connection between the main load-bearing beam and the platform of the wind turbine in the existing technology, and to provide a three-section omnidirectional elastic vibration damping support structure for wind turbines with reasonable structure and reliable performance. This structure forms a spatially coordinated omnidirectional elastic constraint system through the multi-directional flexible hinge formed by the rear support vibration damping, the vertical elastic support provided by the front support vibration damping, and the lateral constraint achieved by the middle side limiting vibration damping. This effectively suppresses and isolates the vibration of the six degrees of freedom of the main load-bearing beam, blocks the transmission of vibration energy to the tower, alleviates stress concentration at the connection, ensures the long-term stable operation of the wind turbine under all working conditions, and has the characteristics of modular installation and convenient maintenance.

[0008] To solve the aforementioned technical problems, the present invention adopts the following technical solution: a three-section universal elastic vibration damping support structure for wind turbines, comprising front support damping, middle side limiting damping, and rear support damping. Its core design concept is "zonal buffering and collaborative constraint." 1. Rear Main Load-Bearing Structure and Multi-directional Buffer Zone: Two symmetrically arranged rear support damping structures form the main load-bearing fulcrum and flexible hinge of the system. Its columnar rubber buffer unit can undergo multi-directional shear deformation, allowing the main load-bearing beam to generate limited elastic rotation at the rear, thereby efficiently absorbing the forward and backward thrust, lateral force, and torsional vibration around the beam axis from the operation of the wind turbine.

[0009] 2. Front Vertical Support and Auxiliary Limiting Zone: The front support damping mainly bears part of the vertical load, provides elastic support in the vertical direction, and together with the rear support, constrains the pitch movement of the beam. Its compact design frees up front space.

[0010] 3. Mid-section lateral restraint and stability zone: Two symmetrically arranged mid-section lateral restraint dampers work together with lateral restraint baffles to form a horizontal elastic constraint on the main load-bearing beam from both sides, limiting its excessive lateral displacement, improving lateral stability, and buffering horizontal lateral vibration.

[0011] The three functional modules form a stable statically determinate or low-order statically indeterminate support in space. The high damping characteristics of the rubber material convert the vibrational mechanical energy into heat energy for dissipation, rather than transferring it to the lower structure.

[0012] Specifically, this utility model discloses a three-section universal elastic vibration damping support structure for wind turbines, used to connect the main load-bearing beam of the wind turbine hub with the lower platform, including front support vibration damping, middle side limiting vibration damping and rear support vibration damping; The front support damping is located between the main load-bearing beam and the lower platform, and at the front of the main load-bearing beam. It includes at least one first buffer unit for bearing vertical loads and buffering vertical vibrations. The middle side limiting and damping device is located between the main load-bearing beam and the lower platform, and is symmetrically located on both sides of the middle part of the main load-bearing beam. It includes at least one lateral buffer limiting unit for buffering horizontal lateral vibration and limiting the lateral displacement of the main load-bearing beam. The rear support damping is located between the main load-bearing beam and the lower platform, and is symmetrically positioned on both sides of the rear of the main load-bearing beam. The rear support damping includes an upper metal plate, a lower metal plate, and columnar buffer units bonded between the two through vulcanization. The upper metal plate is fixedly connected to the main load-bearing beam, and the lower metal plate is fixedly connected to the lower platform. When subjected to load, the columnar buffer units can undergo multi-directional elastic shear and compression deformation, providing the main load-bearing beam with flexible rotation capability around the rear support point, and absorbing impacts and vibrations from the front, back, left, right, and torsional directions.

[0013] Furthermore, the central side limiting shock absorber is pressed and fixed to the lower platform by an independent side limiting baffle; the side limiting baffle is an angle steel structure, its vertical side plate is attached to the side of the central side limiting shock absorber, and its horizontal bottom plate is fixed to the lower platform by a connector.

[0014] Furthermore, the upper metal plate of the rear support and shock absorber is fixedly connected to the web or lower flange of the main load-bearing beam by a connecting angle steel.

[0015] Furthermore, the elastomers in the front support damping, the middle side limiting damping, and the rear support damping are all made of high-damping rubber material.

[0016] Compared with existing technologies, this invention offers the following advantages: It absorbs multi-directional translational and torsional vibrations through a rear flexible hinge, restricts lateral displacement through lateral limiting in the middle, and provides vertical buffering through front vertical support, achieving targeted isolation and attenuation of vibrations in six degrees of freedom in space. The use of elastic support avoids stress concentration at rigid connection points, allowing the load to be more evenly transferred to the lower platform through surface-contact rubber pads, reducing the risk of fatigue failure. The three-section layout of this invention forms a stable support system, providing flexibility while ensuring the stability of the main load-bearing beam in all directions, preventing instability. Each damping module is relatively independent, using standardized rubber elastic elements, making installation, testing, and replacement simple, facilitating maintenance and retrofitting of older units. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings.

[0018] Figure 1 This is a schematic diagram of the structure of this utility model.

[0019] Figure 2 This is a schematic diagram of the main structure of this utility model.

[0020] Figure 3 for Figure 2 A schematic diagram of the right-side structure.

[0021] Figure 4 for Figure 2 A schematic diagram of the left-side view structure.

[0022] In the diagram: 1 is the lower platform, 2 is the main load-bearing beam, 3 is the front support and damping, 4 is the middle side limiting damping, 41 is the side limiting baffle, 5 is the rear support and damping, 51 is the upper metal plate, 52 is the lower metal plate, and 53 is the columnar buffer unit. Detailed Implementation

[0023] The present invention will be further described below with reference to specific embodiments.

[0024] like Figures 1 to 4 As shown, the three-section wind turbine universal elastic vibration damping support structure of this utility model is installed between the main load-bearing beam 2 and the lower platform 1.

[0025] First, two rear support dampers 5 are symmetrically arranged at predetermined positions on the lower platform 1, and their lower metal plates 52 are fixed with bolts. Then, the corresponding rear position of the main load-bearing beam 2 is fixedly connected to the upper metal plate 51 of the rear support dampers 5 via connecting angle steel, thus establishing a flexible support point at the rear of the main load-bearing beam. Next, a front support damper 3 is installed below the front of the main load-bearing beam 2, with its top in contact with the beam body or fixed via connectors, and its bottom supported on the lower platform 1. Finally, middle side-limiting dampers 4 are installed on both sides of the middle of the main load-bearing beam 2, and are pressed and fixed to the lower platform 1 with side-limiting baffles 41, the horizontal plates of the side-limiting baffles 41 being fixed with bolts.

[0026] The working process of this utility model: When the fan vibrates during operation: the front-to-back load, the left-to-right lateral load, and the torsional moment on the main load beam 2 are mainly absorbed and buffered by the columnar buffer unit 53 of the rear support and shock absorber 5 through shear deformation.

[0027] Vertical vibrations are buffered by compression deformation through the combined action of the front support damper 3 and the rear support damper 5.

[0028] The horizontal vibration and displacement are constrained by the compression and shear deformation of the side limiting damping 4 on both sides. The side limiting baffle 41 provides a rigid limiting boundary to prevent excessive displacement.

[0029] Throughout the process, the high-damping rubber material in each damping unit converts the absorbed vibration energy into heat energy dissipation, thereby significantly reducing the dynamic load transmitted to the lower platform 1 and the tower.

[0030] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A three-section universal elastic vibration damping support structure for a wind turbine, used to connect the main load-bearing beam (2) of the wind turbine hub with the lower platform (1), characterized in that, Including front support damping (3), middle side limiting damping (4) and rear support damping (5); The front support damping (3) is located between the main load-bearing beam (2) and the lower platform (1), and is located at the front of the main load-bearing beam (2), including at least one first buffer unit for bearing vertical loads and buffering vertical vibrations; The middle side limiting shock absorber (4) is set between the main load-bearing beam (2) and the lower platform (1), and is symmetrically located on both sides of the middle part of the main load-bearing beam (2), including at least one lateral buffer limiting unit for buffering horizontal lateral vibration and limiting the lateral displacement of the main load-bearing beam; The rear support damping (5) is located between the main load-bearing beam (2) and the lower platform (1), and is symmetrically located on both sides of the rear of the main load-bearing beam (2). The rear support damping (5) includes an upper metal plate (51), a lower metal plate (52), and a columnar buffer unit (53) bonded between the two by vulcanization. The upper metal plate (51) is fixedly connected to the main load-bearing beam (2), and the lower metal plate (52) is fixedly connected to the lower platform (1). The columnar buffer unit (53) can undergo multi-directional elastic shear and compression deformation when bearing load, providing the main load-bearing beam (2) with flexible rotation capability around the rear support point, and absorbing impacts and vibrations from the front, back, left, right and torsional directions.

2. The three-section universal elastic vibration damping support structure for wind turbines according to claim 1, characterized in that, The middle side limiting shock absorber (4) is pressed and fixed on the lower platform (1) by an independent side limiting baffle (41); the side limiting baffle (41) is an angle steel structure, its vertical side plate is attached to the side of the middle side limiting shock absorber (4), and its horizontal bottom plate is fixed to the lower platform (1) by a connector.

3. The three-section universal elastic vibration damping support structure for wind turbines according to claim 1, characterized in that, The upper metal plate (51) of the rear support shock absorber (5) is fixedly connected to the web or lower flange of the main load-bearing beam (2) by a connecting angle steel.

4. The three-section wind turbine universal elastic vibration damping support structure according to any one of claims 1-3, characterized in that, The elastomers in the front support damping (3), the middle side limiting damping (4), and the rear support damping (5) are all high-damping rubber materials.

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