Mechanics, Materials Science & Engineering, September 2017 – ISSN 2412-5954
Applied Load on Blade Bearing in Horizontal Axis Wind Turbine Generator 1
Chen L.1, a, Xia X. T. 1,2, Qiu M. 1 1 – College of Mechatronics Engineering, Henan University of Science & Technology, Luoyang, China 2 – Collaborative Innovation Centre of Machinery Equipment advanced Manufacturing of Henan Province, China a – haustchenlong@163.com DOI 10.2412/mmse.3.51.716 provided by Seo4U.link
Keywords: applied load, blade bearing, horizontal axis, slewing ring, wind turbine.
ABSTRACT. Rolling bearing life is typically calculated on the basis of its load ratings relative to the applied loads and the requirements regarding bearing life and reliability. Variation of applied load influences the load distribution in blade bearing directly and the load on maximum-loaded ball fluctuates with the applied load. Life of blade bearing is influenced by these variations eventually. Analysis and calculation method of applied load on blade bearing is illustrated by the case of a horizontal axis wind turbine.
Introduction. Wind turbine generator (WTG) is the equipment, which translates wind power to electrical energy, it can be divided into horizontal axis and vertical axis wind turbine. WTG can also be classified by the types of control modes. They are fixed speed stall regulated, fixed speed pitch regulated, variable speed stall regulated and variable speed pitch regulated, respectively. Horizontal axis wind turbine generator (HAWT) by variable speed pitch regulated is rapid developed in recent years and there are four kinds of bearings in the turbine. Structural rigidity is an important characteristic of WTG, and many investigators published relative results. For example, Jianhong et al. [12] analysed Dynamic Behaviour of Wind Turbine by a Mixed Flexible-Rigid Multi-Body Model. Blade is the component which gaining energy from the wind. Hence, the relationship between blade shape and velocity attracted more attention, for instance, Yukimaru [11] investigated the flow around blade tip of a HAWT. As for rolling bearings being used in HAWT, it mainly includes yaw bearing, blade bearing, mainshaft bearing and gearbox bearing, as illustrated in Fig. 1. There are various structures of rolling bearing. Many researchers developed special researches on determining appropriate structure of rolling bearing for HAWT. Chen et al. [3] discussed better choice of rolling bearings mounted on different positions in HAWT. Nobuyuki and Souich [6] illustrated technical trends of wind turbine bearings.
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© 2017 The Authors. Published by Magnolithe GmbH. This is an open access article under the CC BY-NC-ND license http://creativecommons.org/licenses/by-nc-nd/4.0/
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