Development Of Megawatt-level Wind Power Pitch, Yaw And Main Bearing Testing Machine

With the problem about the energy crisis and the living environment becoming increasingly prominent, pollution-free and sufficient wind energy has been gradually paid attention to and worthy of favor, so the wind power industry also has been strongly advocated and developed by various regions and countries.The design and manufacture of the bearing in wind turbine, especially pitch, yaw and main bearing and other key parts, has become important foundation of those wind power bearing companies as one of the core technology of wind turbine. Bearing testing machine, as the important tool and method that can be used to test quality, acquire performance parameters, guide the design and production of bearings as well as improve the bearing design theory,is one of the key elements that means the ability of the company to manufacture the bearings provided with state-of-the-art design, excellent processing quality and performance. Therefore, according to the features and performance requirement for the pitch, yaw and main bearing in MW wind turbine the development of the bearing testing machine is carried out in this paper. A lot of research work has been completed in the development process which is summarized as follows:(1) Through using the design method of modular structure, the overall scheme of the testing machine is developed, which can tests pitch, yaw bearings and main bearings in wind turbine(2) On the basis of the overall scheme, the mechanical structure of the testing machine is designed. Meanwhile, the mechanical assembly drawings, parts diagram and parts diagram are drawn. According to the requirements of designing and technical indicators, standard parts are determined by calculating, selecting and checking;(3) The key components of the testing machine are simplified and established to3-D models by using Pro/E. And then, their stiffness and strength is checked by the finite element analysis software ANSYS;(4) The hydraulic system is designed. The various components, including the drive motor, hydraulic pumps, hydraulic cylinders, hydraulic motors and solenoid control relief valve, proportional pressure reducing valves and other hydraulic control parts, are determined. And then, the hydraulic circuit diagram and hydraulic station assembly drawing are completed;(5) The communication approach of OMRON programmable controller and the computer is identified. The selection and installation form of the displacement sensors, the temperature sensors and the speed torque sensor in the measurement and control system of the testing machine are determined. The good man-machine surface is designed that has double operator panels to complete manual or automatic control.The wind power pitch, yaw and main bearing testing machine which is developed in this paper have obtained the demonstration and procurement of a large-scale domestic wind power bearing enterprise. Its performance and technical indicators can meet the requirements to test bearings, which can be effective to test pitch, yaw and main bearings, inspect their quality, and to guide the design and manufacture as well as improve the wind power bearing design theory.