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Spherical liquid vibration reduction device suitable for fan blade and installation method thereof

A technology of fan blades and vibration damping devices, which is applied in the assembly of wind turbines, wind turbines, engines, etc., can solve the problems of reducing effective life, blade breakage, economic loss, etc., and achieve the effect of improving vibration damping effect

Active Publication Date: 2020-02-21
LANZHOU UNIVERSITY OF TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • Spherical liquid vibration reduction device suitable for fan blade and installation method thereof
  • Spherical liquid vibration reduction device suitable for fan blade and installation method thereof
  • Spherical liquid vibration reduction device suitable for fan blade and installation method thereof

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Embodiment Construction

[0020] like Figure 1~Figure 5 As shown, the present invention is a spherical liquid damping device suitable for fan blades and an installation method, and the spherical liquid damping device suitable for fan blades includes a spherical mass, a return-type fixed plate 9, and a shape memory alloy spring 10 , an assembly and a fiber rope, the spherical mass block is provided with 3 diameters that increase sequentially from top to bottom, that is, No. 1 spherical mass 3, No. 2 spherical mass 4, and No. 3 spherical mass 5, Each spherical mass is composed of a hollow spherical shell 41, a full-carbon airgel 44 and a high-density liquid 42, wherein the full-carbon airgel 44 is packed in the hollow of the hollow spherical shell 41 after being wrapped with an elastic waterproof material 43, It occupies 1 / 2 of the hollow volume, and the remaining 1 / 2 hollow volume is filled with high-density liquid 42; the return-type fixed plate 9 is provided with 3 pieces corresponding to the 3 spher...

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Abstract

The invention relates to a spherical liquid vibration reduction device suitable for a fan blade and an installation method thereof. The spherical liquid vibration reduction device comprises sphericalmass blocks, concentric-square-shaped fixing plates, shape memory alloy springs, combined parts and fiber ropes; the ultra-high molecular weight polyethylene fiber ropes are connected in series with the three spherical mass blocks which are sequentially increased in diameter from top to bottom inside the fan blade, the periphery of each spherical mass block is fixed on each concentric-square-shaped fixing plate designed on the inner side of the fan blade through one shape memory alloy spring, and one-half of the high density liquid and one-half of the full carbon aerogel are charged in each spherical mass block. The spherical mass blocks are driven to vibrate in sequence from top to bottom through vibration of the blade, the acting force opposite to the external excitation is generated toreduce the vibration of a main structure, meanwhile, when the spherical mass blocks are vibrated, the liquid in a shell is compressed due to the action of inertia force and pushes the high-elasticityfull carbon aerogel to rotate around the center of a sphere, so that the gravity center of each spherical mass block is always moved to the opposite direction from the vibration of the blade, the acting force opposite to the external excitation is increased, and the vibration reduction effect is improved.

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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03D80/00F03D13/10F16F15/121F16F15/167
CPCF16F15/121F16F15/167F03D13/10F03D80/00Y02E10/72
Inventor 李万润李刚刚郭艺博苏彤杜永峰
Owner LANZHOU UNIVERSITY OF TECHNOLOGY
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