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Method for inhibiting vortex-induced vibration of fan

A technology of vortex-induced vibration and fan, which is applied in the direction of wind power engine, machine/engine, engine, etc., to achieve the effects of easy implementation, cost saving and safety assurance

Active Publication Date: 2021-02-12
CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no method to suppress the vortex-induced vibration of the blade, and then suppress the coupling vibration of the tower and the blade.

Method used

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  • Method for inhibiting vortex-induced vibration of fan
  • Method for inhibiting vortex-induced vibration of fan

Examples

Experimental program
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Embodiment 1

[0026] Embodiment 1, a method for suppressing vortex-induced vibration of a wind turbine, the wind turbine includes a wind wheel system, a nacelle 4 and a tower 1 connected in sequence, and the wind wheel system includes a wind wheel 5 and blades connected to the wind wheel 5 2. The steps of the above method include the commissioning process after the assembly of the wind turbine system and the nacelle 4 is completed, and the pitch angle of the blade 2 is adjusted with reference to the load range that the wind turbine can bear, wherein the pitch angle is the distance between the blade chord line and the rotation plane. The angle specifically refers to the angle between the airfoil chord line at the top of the blade 2 and the rotation plane.

[0027] The specific steps of the above method are: before the wind turbine system is hoisted, combined with the previous wind resource data of the wind field where the wind turbine is located, the simulation analysis of the load borne by t...

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Abstract

The invention relates to the field of fan control, in particular to a method for inhibiting vortex-induced vibration of a fan. The fan comprises a wind wheel system, a cabin and a tower connected successively. The wind wheel system comprises a wind wheel and a blade connected to the wind wheel (5). The method comprises the step of adjusting a pitch angle of the blade with reference to a load rangecapable of borne by the fan in a non-electrified state of the fan. According to the method, it is not needed to add an extra device, so that the cost is saved. The method is easy to implement, is obvious in vortex-induced vibration inhibiting effect and is suitable for being popularized and used.

Description

technical field [0001] The invention relates to the field of fan control, in particular to a method for suppressing vortex-induced vibration of a fan. Background technique [0002] The principle of vortex-induced vibration is: from the perspective of fluid, any non-streamlined object, at a constant flow rate, will alternately generate vortices on both sides of the object that are separated from the surface of the structure. This alternate vortex will generate pulsating pressure on the cylinder that changes periodically along the flow direction and cross-flow direction. If the cylinder is elastically supported at this time, or the flexible pipe body allows elastic deformation, the pulsating fluid force will cause The periodic vibration of the column (pipe body), which in turn will change the vortex distribution pattern of its wake. When the change in pressure couples to the natural frequency of the cylinder, resonant vibration occurs, a phenomenon known as frequency locking....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03D7/04
CPCF03D7/0224F03D7/0296Y02E10/72Y02P70/50
Inventor 吕杏梅巫发明林松钟杰陆道辉申亮肖进王志林方国欣黄翀
Owner CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST
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