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.
XU Quan-kun, LI Wei, LIU Hong-wei, LIN Yong-gang, SHI Mao-shun. Individual blade pitching system for horizontal axis tidal current turbine. J4, 2013, 47(3): 528-534.
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