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Methods of Suppressing Vortex Induced Vibration of Fans

A technology of vortex-induced vibration and fan, which is applied in the direction of wind power engines, machines/engines, engines, etc., to achieve the effect of suppressing vortex-induced vibration, easy to implement, and cost-saving effects

Active Publication Date: 2022-07-12
CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
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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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  • Methods of Suppressing Vortex Induced Vibration of Fans
  • Methods of Suppressing Vortex Induced Vibration of Fans

Examples

Experimental program
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Embodiment 1

[0026] Embodiment 1, a method for suppressing vortex-induced vibration of a fan, the fan comprises a wind turbine system, a nacelle 4 and a tower 1 connected in sequence, the wind turbine system includes a wind wheel 5 and blades connected to the wind wheel 5 2, the steps of the above method include the debugging process after the wind turbine system and the nacelle 4 are assembled, and the pitch angle of the blade 2 is adjusted with reference to the load range that the fan can bear, wherein the pitch angle is the clip between the blade chord line and the rotation plane. The angle specifically refers to the included 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 data of the past wind resources of the wind farm where the wind turbine is located, simulate and analyze the load condition of the wind turbine that adjusts the angle ...

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Abstract

The invention relates to the field of fan control, in particular to a method for suppressing vortex-induced vibration of a fan. The blower comprises a wind wheel system, a nacelle and a tower which are connected in sequence, the wind wheel system comprises a wind wheel and a blade connected to the wind wheel (5), and the steps of the method include in the non-energized state of the blower, Adjust the pitch angle of the blades with reference to the load range that the fan can withstand. This method not only does not need to add additional devices, saves costs, but is easy to implement, has obvious effect of suppressing vortex-induced vibration, and is suitable for popularization and use.

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 point of view of the fluid, any bluff object, under a constant flow rate, will alternately generate vortices that detach from the surface of the structure on both sides of the object. This alternating vortex will generate pulsating pressure on the cylinder with periodic changes in the forward and transverse directions. If the cylinder is elastically supported at this time, or the flexible pipe body is allowed to elastically deform, the pulsating fluid force will cause Periodic vibration of the cylinder (tube), which in turn changes the vortex release pattern of its wake. When the change in pressure is coupled with the natural frequency of the cylinder, resonance vibration occurs, which is the phenomenon of frequency locking. Therefore, as fa...

Claims

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Application Information

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Patent Type & Authority Patents(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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