Multi-mass point series speed amplification vibration damping device and connection method for wind power blades

Abstract

A wind power blade multi-mass point series speed amplification type vibration damping device and connection method, by installing hollow mass steel balls connected in series in the wind power blades, and setting a solid steel ball and a solid latex ball in the hollow mass steel balls, cooperating with fixed The pulley device and speed amplification device achieve multi-layer and multi-directional vibration reduction. When the blade vibrates, it drives the hollow mass steel ball near the blade tip to vibrate. Each hollow mass steel ball can limit the vibration of the front hollow mass steel ball to achieve the effect of multi-layer vibration reduction. There is a solid steel ball inside the hollow mass steel ball. Ball and a solid latex ball, when the hollow mass steel ball vibrates, the latex ball, which is a viscoelastic material, will absorb part of the energy and consume energy when it collides with the steel ball, and the hollow mass steel ball in series will also stretch in any direction when vibrating The steel cable makes the speed amplifying device work, indirectly increases the damping, achieves multi-directional vibration reduction, and effectively controls the multi-directional vibration of the wind power blades without excessively increasing the mass of the wind power blades.

Description

technical field [0001] The invention relates to the technical field of wind power generation structure vibration reduction control, in particular to a wind power blade multi-mass point series speed amplification type vibration reduction technology. Background technique [0002] As a renewable and clean energy, wind energy has been favored by countries all over the world. According to the annual report of the Global Wind Energy Council (GWEC), the new installed capacity of wind turbines in the world reached 60.4GW in 2019, second only to 63.8GW in 2015. The momentum is still going strong, so wind turbine towers and blades are also getting taller and longer in order to better capture wind energy. However, in the process of the development of large blades, their weight and length increase, and the loads they bear are complex—mainly gravity loads, inertial loads and unsteady changing aerodynamic loads. The blades are prone to multi-directional vibration under complex loads, but...

AI Technical Summary

Problems solved by technology

However, in the process of blade development toward large size, its weight and length increase, and the loads it bears are complex—mainly gravity loads, inertial loads and unsteady changing aerodynamic loads

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