Spherical liquid vibration damping device suitable for fan blades and installation method

Abstract

The spherical liquid vibration damping device suitable for fan blades and its installation method include a spherical mass block, a return-type fixed plate, a shape memory alloy spring, an assembly and a fiber rope. By using ultra-high molecular weight polyethylene fiber ropes, three spherical mass blocks with increasing diameters are connected in series from top to bottom inside the fan blade, and each spherical mass block is fixed on the inside of the fan blade by a shape memory alloy spring around the design. Return to the fixed plate, and fill the spherical mass with 1 / 2 high-density liquid and 1 / 2 full-carbon aerogel. The vibration of the blade drives the spherical mass block to vibrate sequentially from top to bottom, generating a force opposite to the external excitation to reduce the vibration of the main structure. At the same time, when the spherical mass block vibrates, the liquid in the shell is affected by the inertial force , compress and push the high-elastic all-carbon airgel to rotate around the center of the sphere, so that the center of gravity of the spherical mass always moves in the direction opposite to the vibration of the blade, increasing the force opposite to the external excitation and improving the vibration reduction effect .

Description

technical field [0001] The invention relates to a vibration reduction control technology for a fan structure, in particular to a spherical liquid vibration reduction technology suitable for fan blades. Background technique [0002] Wind power generators have entered the early stage of commercial development, and the development of the impeller technology matching it is also very rapid. The wind rotor of a wind turbine is the most important component for receiving wind energy, and it is also the most basic and core component of a wind turbine. Good design, feasible quality and superior performance are the decisive factors to ensure the normal and stable operation of the unit. As the key component of the fan, the blade is subject to complex forces. During the rotation process, it is coupled by the aerodynamic force, elastic force and inertial force. With the rapid development of the fan industry, the flexibility of the fan blade is increasing, making the blade prone to multipl...

AI Technical Summary

Problems solved by technology

Repeated severe vibration will accelerate the fatigue of the blade material, reduce its effective life, and even cause the blade to break, causing great economic losses

Images