Pitch adjustment method for fan single blade installation
An adjustment method and single-blade technology, which is applied in the assembly of wind turbines, wind power generation, transportation and packaging, etc., can solve problems such as difficult operation and complicated operation process, and achieve the effects of reducing impact, increasing wind speed and reducing movement
Inactive Publication Date: 2019-05-10
SOUTHWEST JIAOTONG UNIV
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Problems solved by technology
The relative disadvantage of this system is that a pulley system needs to be installed on the pendant tower, and the operation process is relatively complicated
Under the action of wind load, if the force on the blade is uneven, the end will rotate around the center of gravity of the blade, and it is still necessary to control the force on the cable to overcome it, and the operation is relatively difficult
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Embodiment Construction
[0020] Below in conjunction with accompanying drawing and embodiment the present invention is described further as follows:
[0021] The method of adjusting the pitch of a single blade of a fan, firstly, taking the length direction of the blade as the x-axis, and the direction of gravity as the z-axis, a fan blade cable system model is established according to the actual size of the blade, the number of cables, the length and the connection position with the blade; and then , through the fan blade cable system model to perform aerodynamic simulations under different working conditions, to obtain the displacement of the blade root in the vertical plane (y(t), z(t)) at time t of each working condition; then, according to the The displacement of the root in the vertical plane obtains the variance of the leaf root movement in T seconds of simulation time:
[0022]
[0023] And find the minimum variance: S min = f min (std)(2);
[0024] The pitch angle corresponding to the mi...
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The invention relates to a method for adjusting the pitch of a fan single-blade installation, which belongs to the technical field of wind power generation. The purpose is to adjust the pitch of the blade according to the measured wind speed, reduce its movement under the action of turbulent wind, reduce the difficulty of blade installation, and increase the operating wind speed installed at sea. Firstly, the cable system model of the fan blade is established; then, the aerodynamic simulation is carried out under different working conditions through the model of the cable system of the fan blade; then, in each working condition, the variance of the blade root motion at different pitch angles is obtained, and the The optimal pitch angle; finally, during the hoisting process, the blade is rotated to the optimal pitch angle position for installation. In the present invention, the pitch of the blades is adjusted according to the measured wind speed, so as to reduce the influence of the wind speed on the installation of the fan, reduce the movement of the blades under the action of the turbulent wind, and increase the working wind speed of the fan installed at sea to 15m / s.
Description
technical field [0001] The invention belongs to the technical field of wind power generation, in particular to a method for adjusting the pitch of a single blade of a fan. Background technique [0002] The exploitable wind resources on land are decreasing day by day, while offshore wind resources are abundant and have little impact on human activities. The development of wind farms from land to offshore and even deep sea is a new direction for the development of clean energy in the future. Offshore wind turbines can be divided into fixed type and floating type according to the type of supporting structure. At present, the existing offshore wind farms are mainly fixed single-pile structures, and the seawater depth does not exceed 40 meters. According to statistics, as of the end of 2015, there were 3,230 fixed offshore wind turbines worldwide, with an average generating capacity of 4.2 MW. China currently has two offshore wind farms in operation, both of which use fixed wi...
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IPC IPC(8): F03D13/10G06F17/50
CPCF03D13/10G06F2119/06G06F30/20Y02E10/72B66C1/108
Inventor 唐猛蒋致禹
Owner SOUTHWEST JIAOTONG UNIV