Fan blade zero degree installation angle calibration method
A technology for fan blades and calibration methods, which is applied to wind turbines, wind turbine components, engines, etc., can solve the problems of a large number of calibration fan blade zero installation angles and late installation time, so as to reduce the loss of power generation and avoid Unbalanced force and obvious technical effect
Active Publication Date: 2014-08-13
GUODIAN UNITED POWER TECH
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[0003] Since the large-scale installation of wind turbines in my country was around 2007, the installation time was relatively late, and the impact of blade installation angles has not attracted special attention compared with other issues of wind turbines. Zero installation angle scheme
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[0025] The invention discloses a method for calibrating the zero-degree installation angle of fan blades. By taking pictures of the installation positions of the actual fan blades at the installation angle of 0°, the photographed pictures are processed, and are compared with the position of the fan blades to be calibrated at the installation angle of 0°. The three-dimensional model is compared, and the positional relationship between the highest point PS of the pressure surface, the trailing edge point TE of the suction surface and the lowest point SS of the suction surface at the specific airfoil section of the calibration blade is calculated, that is, the ratio: λ=(PS- TE) / (PS-SS), determine whether the 0° installation angle of the actual fan blade is correct, adjust the installation angle of the fan blade positively or negatively according to the calibration result, and complete the installation angle calibration process of the three blades in turn.
[0026] Specifically inc...
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The invention discloses a fan blade zero degree installation angle calibration method. The fan blade zero degree installation angle calibration method includes: photographing an installation position of a zero degree installation angle of an actual fan blade so as to obtain a photograph; processing the photograph; comparing the processed photograph with a three dimensional model of the fan blade to be calibrated at the zero degree installation angle; confirming whether the zero degree installation angle of the actual fan blade is correct or not by calculating a position relation among the highest point PS of a specific wing-shaped section of the fan blade to be calibrated, a trailing edge point TE of a force suction surface of the fan blade to be calibrated and the lowest point SS of the force suction surface of the fan blade to be calibrated so as to obtain a specific value Lambada which satisfies the equation that Lambada=(PS-TE) / (PS-SS); adjusting installation angles of the fan blade towards a forward direction or a negative direction according to a calibration result so as to sequentially complete installation angle calibration processes of three blades. The fan blade zero degree installation angle calibration method uses a pixel point number to confirm calibration positions on the blades, can avoid displacement deviation, is obvious in technical effect, can accurately position the calibration positions on the blades, and effectively calibrate installation angle errors among the three blades.
Description
technical field [0001] The invention relates to the technical field of wind power, in particular to a zero-degree installation angle calibration method for fan blades. Background technique [0002] At present, the zero-position installation angle of the blade of the fan is mainly determined through the correspondence between the installation angle scale of the fan blade and the hub pointer of the fan hub. When the control system of the fan blade does not change, if the zero angle position of the blade is not calibrated accurately, there will be a certain deviation between the torque of the blade and the design value at different wind speeds, resulting in that the speed and torque of the fan cannot be set according to the control system. Conditional operation, which in turn affects the power generation of the wind turbine. At the same time, when the zero-degree installation position of the blades of the same fan deviates, it will have a certain impact on the imbalance, stabi...
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Login to View More IPC IPC(8): F03D11/00
CPCY02E10/722
Inventor王耀伟王东徐国庆
OwnerGUODIAN UNITED POWER TECH