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| Individual blade pitching system for horizontal axis tidal current turbine |
| XU Quan-kun, LI Wei, LIU Hong-wei, LIN Yong-gang, SHI Mao-shun |
| State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University, Hangzhou 310027, China |
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Abstract Aiming at the characteristics of horizontal axis tidal current turbine such as small hub, large pitching load, large angles of pitch adjustment and so on, a novel pinion-and-rack individual pitch actuator based on electro-hydraulic proportional technology was designed. This pitching system has a compact structure, takes up little space and the mechanism of each blade works independently. Based on the analysis of the load that the blade subjected to during pitch adjustment, a mathematical model for the system was established, and then simulated in AMESim software. The simulation shows that the individual pitching system costs only 1.1 s when pitching 180° during feathering, and 3.4 s inverse. The system has good performance in terms of quick response and stability and can realize the pitch adjustment independently, meeting the requirements of tidal current turbine.
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Published: 01 March 2013
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水平轴潮流能发电机组独立变桨距系统
针对水平轴潮流能发电机组轮毂空间小、变桨角度大、变桨力矩大等特点,设计一种新型的基于电液比例控制的齿轮齿条传动方案的独立变桨距系统.该系统机械结构紧凑,占用空间小,各个桨叶变桨执行机构相互独立.在分析变桨距载荷的基础上,建立系统的数学模型,并在AMESim软件中对系统进行了仿真研究.仿真结果表明:该系统顺桨变桨180°只需1.1 s,逆桨变桨180°只需3.4 s,响应速度快,稳定性好,并且可以实现独立变桨,满足了水平轴潮流能发电机组的变桨要求.
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