A multi-directional vibration damping device and connection method for prestressed cables of large-scale wind power blades
A technology of wind power blades and vibration damping devices, which is applied in the assembly of wind turbines, the configuration of installing/supporting wind turbines, and wind power generation, and can solve the problems of reducing effective service life, prone to multi-directional vibration, and blade fatigue damage. Achieve the effect of small damage, small vibration and reasonable path
Active Publication Date: 2019-10-01
LANZHOU UNIVERSITY OF TECHNOLOGY
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Problems solved by technology
According to statistics, every 6% increase in the diameter of fan blades can increase the utilization rate of wind energy by about 12%. The diameter of existing wind power rotors can reach 120m. The increase of the blade will lead to a large increase in the vibration of the blade in the two directions of the plane and the plane. At the same time, due to the large aspect ratio of the blade structure, the blade structure is a shell with greater flexibility, and only the root is constrained, which is prone to multi-directional vibration. , which will accelerate the fatigue damage of the blade and reduce its effective service life. In severe cases, the blade will break
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[0024] Such as figure 1 As shown, the present invention is a large-scale wind power blade pre-stressed cable multi-directional vibration damping device and connection method. The large-scale wind power blade pre-stressed cable multi-directional vibration damping device is structured by the T-MAX winch fiber cable force transmission system and accessory The components, the damping system 5 and the wind turbine blade 9 constitute an integral device. The T-MAX winch fiber rope force transmission system is divided into 3 main ropes 6 and 12 secondary ropes 8, and 3 main ropes 6 are connected with 12 secondary ropes 8, 2 tension springs 3 and damping system 5. As the main force transmission system inside the blade; the auxiliary components include four parts: universal bolt ball joint 2, fixed pulley mechanism 7, universal bolt column joint 4 and 4 R-shaped steel pull rings 1; There are 5 universal bolt ball joints 4 according to need, which are connected with T-MAX winch fiber main...
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The invention discloses a multidirectional vibration reduction device for a wind turbine blade adopting prestressed cables, and a connection method. Prestressed T-MAX winch fiber cables are divided into main cables and secondary cables, and the main cables are used as main force-transferring members in the blade, and connected with the blade through the secondary cables. Auxiliary members comprisean extension spring, a universal joint and R-shaped steel bar pull rings; the two ends of the extension spring are connected with the main cables separately; the universal joint is used for connection for the members; and the R-shaped steel bar pull rings are used for connection for the secondary cables and a blade tip. A damping system is composed of a common rotary eddy-current damper, a displacement-amplification movable pulley group and a deformation memory alloy spring, a bottom plate of the damping system is fixed to the inner surface of a blade root through an epoxy resin adhesive, andafter transferred displacement is amplified by the movable pulley group through the prestressed T-MAX winch fiber cables, the eddy-current damper is driven to rotate by a thin steel rope, and the deformation memory alloy spring is extended to consume energy, so that the purpose of multidirectional vibration reduction for the blade is achieved.
Description
Technical field [0001] The invention relates to the technical field of wind power generation structure vibration reduction control, and specifically relates to the vibration reduction technology of prestressed cable wind power blades. Background technique [0002] As a new type of clean energy with abundant storage and inexhaustible resources, wind energy has become an important direction of global energy development and utilization due to its simple development and utilization and wide distribution. As one of the important components of renewable energy, wind energy has attracted wide attention from researchers and has also received strong support from governments of various countries. [0003] According to the global wind power market statistics report released by the Global Wind Energy Council (GWEC) on February 14, 2018, the cumulative global installed capacity will reach 539.581 GW by the end of 2017. my country’s newly installed wind power capacity and cumulative installed ca...
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IPC IPC(8): F03D13/20F03D13/10F03D80/00
CPCF03D13/10F03D13/20F03D80/00Y02E10/72Y02E10/728
Inventor 李万润李刚刚吴荣荣吴国民向荣江潘旭宾杨丹青万偲偲杜永峰
Owner LANZHOU UNIVERSITY OF TECHNOLOGY