Damping and buffering transportation device for wind power blades

Abstract

The utility model discloses a wind power blade damping buffer transportation device which comprises a pressing assembly and an installation base, the pressing assembly is arranged on the top of the installation base, at least two sets of steel plate springs are installed between the pressing assembly and the installation base, the pressing assembly comprises a fixing frame, a lifting machine is fixed in the fixing frame, and the lifting machine is connected with the installation base. A pressing frame is fixed to the lifting end of the lifting machine, the center of the steel plate spring is fixed to the mounting base through a U-shaped bolt, the two ends of the steel plate spring are rotationally connected with hinged supports, and the steel plate spring is fixedly connected with the bottom end of the fixing frame through the hinged supports. A steel plate spring formed by overlapping a plurality of curvature gradient alloy spring steel plates is used as a core buffering element. Due to the unique non-linear rigidity characteristic, the interlayer damage of a blade composite material is effectively avoided, and the buffering capacity for various road surface vibrations is greatly improved.

Description

Technical Field

[0001] This utility model belongs to the field of wind turbine blade transportation technology, specifically relating to a wind turbine blade shock absorption and buffer transportation device. Background Technology

[0002] As wind turbine generator capacities increase to 10MW and above, wind turbine blade lengths have exceeded 100 meters. These ultra-long blades face significant structural dynamic challenges during land transportation, particularly regarding the protection of the blade's tail end. Due to its thin-walled cross-section and the anisotropic characteristics of its composite laminate structure, the blade tail end is susceptible to external excitation in a free cantilever state, leading to damage such as matrix interface debonding or skin wrinkling. Therefore, it is explicitly required that the blade tail end be kept horizontal during transportation. This is achieved by reducing the structural center of gravity height (typically controlled to within 3.5m) to ensure stability during transport, while simultaneously avoiding road height restrictions.

[0003] Traditional transport devices typically employ a rigid fixing method, where the blade tail ends are directly locked to the transport vehicle using a metal frame and bolts. However, this design has significant drawbacks: when the vehicle travels over uneven surfaces, the lack of a buffer structure between the frame and the blades allows road impacts to be directly transmitted to the blades, causing localized stress concentration. Real-world transport cases show that micro-cracks easily appear at the root area of ​​the blade tail ends when traveling on bumpy roads, severely impacting blade lifespan. Furthermore, existing devices lack flexible adjustment capabilities; the installation interface dimensions vary significantly between different blade models, leading to uneven pressure distribution during fixing and further exacerbating structural damage. To improve buffering performance, some improvements attempt to add rubber pads or ordinary springs to the bottom of the fixing frame. However, rubber materials are prone to hardening and failure at low temperatures and can undergo permanent deformation and lose elasticity after prolonged pressure; ordinary springs suffer from problems such as unidirectional load bearing and susceptibility to resonance. Tests show that when a vehicle travels at 30 km / h over gravel roads, the shock absorption efficiency of an ordinary spring buffer system is less than 40%, and the blades still experience significant vibration and impact, significantly reducing blade service life. Based on this, this utility model proposes a wind turbine blade shock absorption and buffer transportation device, which can achieve rapid adjustment, positioning and stable fixation while ensuring buffer performance. Utility Model Content

[0004] To achieve the above objectives, this utility model provides the following technical solution: a wind turbine blade shock absorption and buffer transportation device, comprising a clamping assembly and a mounting base. The clamping assembly is disposed on the top of the mounting base, and at least two sets of leaf springs are installed between the clamping assembly and the mounting base. The clamping assembly includes a fixed frame, and a lifting machine is fixed inside the fixed frame. The clamping frame is fixed to the lifting end of the lifting machine. The center of the leaf spring is fixed to the mounting base by a U-bolt. Both ends of the leaf spring are rotatably connected to hinged supports, and the leaf spring is fixedly connected to the bottom end of the fixed frame through the hinged supports.

[0005] As a preferred embodiment of this utility model, the leaf spring is composed of multiple alloy spring steel plates with gradually changing curvature stacked together.

[0006] As a preferred embodiment of this utility model, a padding layer is fixed to both the inner top wall of the fixed frame and the top end face of the pressing frame.

[0007] As a preferred embodiment of this utility model, the lift includes an X-shaped movable frame, the bottom two ends of the X-shaped movable frame are movably connected to a fixed frame, the top two ends of the X-shaped movable frame are movably connected to a pressing frame, and a hydraulic drive cylinder is installed at the bottom of the X-shaped movable frame.

[0008] As a preferred embodiment of this utility model, guide grooves are provided on both sides of the fixed frame, and pulleys adapted to the guide grooves are provided at the ends of the clamping frame. The ends of the clamping frame and the fixed frame are slidably connected through the guide grooves and pulleys.

[0009] As a preferred embodiment of this utility model, the mounting base is uniformly fixed with fixed supports on both sides.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] (1) This utility model uses a leaf spring made of multiple alloy spring steel plates with gradually varying curvature as the core buffer element. Its unique nonlinear stiffness characteristics effectively avoid interlayer damage of the blade composite material and greatly improve the buffering capacity against various road surface vibrations. The combination of the hinged support and the leaf spring can simultaneously withstand vertical, lateral and longitudinal composite loads. By driving the X-shaped movable frame with a hydraulic cylinder, the lifting and lowering adjustment of the clamping frame can be completed quickly, accurately adapting to blade interfaces of different heights. The leaf spring has a long service life, extends the maintenance cycle, and reduces maintenance costs.

[0012] (2) The cooperation between the guide groove and the pulley block ensures that the clamping frame moves vertically without deviation, guaranteeing the stability of the blades during adjustment and avoiding friction damage caused by inaccurate positioning. The multi-layer composite pad effectively prevents indentations on the blade surface, adapting to complex environments and different load-bearing requirements. The fixed support and the mounting base are connected by high-strength bolt groups to ensure the stability of the device throughout the transportation process. Attached Figure Description

[0013] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the overall structure of this utility model from another angle;

[0016] In the diagram: 1. Mounting base; 2. Leaf spring; 3. Fixed frame; 4. Hydraulic drive cylinder; 5. Clamping frame; 6. Hinge support; 7. Pad layer; 8. X-shaped movable frame; 9. Fixed support; 10. Guide groove; 11. Pulley. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Example

[0019] Please see Figure 1-2 The present invention provides the following technical solution: a wind turbine blade shock absorption and buffer transportation device, including a clamping component and a mounting base 1. The clamping component is set on the top of the mounting base 1. At least two sets of leaf springs 2 are installed between the clamping component and the mounting base 1. The clamping component includes a fixed frame 3. A lifting machine is fixed inside the fixed frame 3. The lifting end of the lifting machine is fixed with a clamping frame 5. The center of the leaf spring 2 is fixed to the mounting base 1 by a U-bolt. Both ends of the leaf spring 2 are rotatably connected to hinged supports 6. The leaf spring 2 is fixedly connected to the bottom end of the fixed frame 3 through the hinged supports 6. The leaf spring 2 is made of multiple alloy spring steel plates with gradually changing curvature.

[0020] In order to effectively protect the surface of wind turbine blades and prevent scratches and wear caused by hard contact during fixing and transportation, and at the same time play a role in buffering and shock absorption, avoid the blades from being subjected to additional stress impact, and improve the safety of blade transportation, in this embodiment, as a preferred technical solution of the present invention, a pad layer 7 is fixed to the inner top wall of the fixing frame 3 and the top end face of the pressing frame 5.

[0021] In order to achieve flexible and stable adjustment of the height of the clamping frame 5 to adapt to the installation and fixing requirements of wind turbine blades of different sizes, and to ensure a smooth lifting process, avoid the blades from shaking or tilting during adjustment, and enhance the versatility and practicality of the device, in this embodiment, as a preferred technical solution of the present invention, the lifting machine includes an X-shaped movable frame 8, the bottom two ends of the X-shaped movable frame 8 are movably connected to the fixed frame 3, the top two ends of the X-shaped movable frame 8 are movably connected to the clamping frame 5, and a hydraulic drive cylinder 4 is installed at the bottom of the X-shaped movable frame 8.

[0022] To ensure precise guidance of the clamping frame 5 during vertical lifting and lowering, reduce frictional resistance, improve the stability of movement, and enable the clamping frame 5 to stably fix and adjust the wind turbine blades, avoiding unstable blade fixation or uneven force due to offset, in this embodiment, as a preferred technical solution of the present invention, guide grooves 10 are provided on both sides of the fixed frame 3, and pulleys 11 adapted to the guide grooves 10 are provided at the ends of the clamping frame 5. The ends of the clamping frame 5 and the fixed frame 3 are slidably connected through the guide grooves 10 and the pulleys 11.

[0023] In order to enhance the connection stability between the entire transport device and the axle vehicle bearing surface, ensure that the device will not shift or shake during transport, improve the safety and stability of transport, and provide a reliable support foundation for wind turbine blades, in this embodiment, as a preferred technical solution of the present invention, fixed supports 9 are evenly fixed on both sides of the mounting base 1.

[0024] In summary, this wind turbine blade vibration damping and transport device achieves stable fixation and efficient vibration damping at the blade tail end through the coordinated action of multiple components. Its working principle is as follows:

[0025] Blade fixing and lifting adjustment: The blade tail end passes horizontally through the interior of the fixed frame 3 and is placed on top of the clamping frame 5. Then, the hydraulic drive cylinder 4 pushes the X-shaped movable frame 8 to unfold or retract, causing the clamping frame 5 to rise and fall vertically along the guide groove 10 of the fixed frame 3. The cooperation between the pulley 11 and the guide groove 10 ensures that the clamping frame 5 moves only in the set direction, avoiding deviation or tilting. By adjusting the stroke of the hydraulic drive cylinder 4, the height of the clamping frame 5 can be precisely controlled to adapt to the installation requirements of different blade models.

[0026] Shock absorption and buffering process: The leaf spring 2, as the core buffer element, is symmetrically arranged between the mounting base 1 and the fixed frame 3. Its center is fixed to the mounting base 1 by U-bolts, and both ends are connected to the bottom of the fixed frame 3 via hinged supports 6. When a transport vehicle passes over an uneven road surface, the impact is transmitted to the leaf spring 2 through the mounting base 1. Because the leaf spring 2 is composed of multiple alloy spring steel plates with gradually changing curvature, its stiffness gradually increases with increasing deformation.

[0027] Small-amplitude vibration: The low initial stiffness of the leaf spring 2 (50-80 N / mm) can absorb high-frequency, low-amplitude vibration energy; Large-amplitude impact: As the compression increases, the interlayer contact area of ​​the leaf spring 2 expands, effectively suppressing low-frequency, large-amplitude vibration. The hinged support 6 allows the leaf spring 2 to swing slightly during vertical compression, avoiding stress concentration in a single direction and dispersing lateral impact force.

[0028] Contact surface protection and pressure distribution: Both the inner top wall of the fixing frame 3 and the top end face of the clamping frame 5 are equipped with padding layers 7. These padding layers 7 are composed of multiple layers of composite materials: a surface layer of polyurethane-aramid fiber, a middle layer of closed-cell silicone, and a bottom layer of vulcanized nitrile rubber. This allows them to adapt to different temperature environments and maintain elasticity over a long period. When the clamping frame 5 clamps the blade, the surface of the padding layer 7 is uniformly provided with hemispherical protrusions. These hemispherical protrusions disperse the contact pressure, reducing localized stress concentration on the blade surface and preventing interlayer delamination of the composite materials.

[0029] Overall stability: The fixed supports 9, which are evenly distributed on both sides of the mounting base 1, are connected to the bearing surface of the axle vehicle by bolts to ensure the overall rigidity of the device.

[0030] Finally, it should be noted that, in this utility model, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixing," "screw connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0031] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A wind turbine blade shock absorption and buffer transportation device, comprising a clamping assembly and a mounting base (1), wherein the clamping assembly is disposed on the top of the mounting base (1), characterized in that: At least two sets of leaf springs (2) are installed between the clamping assembly and the mounting base (1). The clamping assembly includes a fixed frame (3). A lifting machine is fixed inside the fixed frame (3). A clamping frame (5) is fixed at the lifting end of the lifting machine. The center of the leaf spring (2) is fixed to the mounting base (1) by a U-bolt. Both ends of the leaf spring (2) are rotatably connected to hinged supports (6). The leaf spring (2) is fixedly connected to the bottom end of the fixed frame (3) through the hinged supports (6).

2. The wind turbine blade shock absorption and buffer transportation device according to claim 1, characterized in that: The leaf spring (2) is made of multiple alloy spring steel plates with gradually changing curvature stacked together.

3. The wind turbine blade shock absorption and buffer transportation device according to claim 1, characterized in that: The inner top wall of the fixed frame (3) and the top end face of the clamping frame (5) are both fixed with padding layers (7).

4. The wind turbine blade shock absorption and buffer transportation device according to claim 1, characterized in that: The lift includes an X-shaped movable frame (8), the bottom two ends of the X-shaped movable frame (8) are movably connected to the fixed frame (3), the top two ends of the X-shaped movable frame (8) are movably connected to the pressing frame (5), and a hydraulic drive cylinder (4) is installed at the bottom of the X-shaped movable frame (8).

5. The wind turbine blade shock absorption and buffer transportation device according to claim 1, characterized in that: The fixed frame (3) has guide grooves (10) on both sides, and the end of the clamping frame (5) is provided with a pulley (11) that matches the guide groove (10). The end of the clamping frame (5) and the fixed frame (3) are slidably connected through the guide groove (10) and the pulley (11).

6. The wind turbine blade shock absorption and buffer transportation device according to claim 1, characterized in that: The mounting base (1) is evenly fixed with fixed supports (9) on both sides.

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