Research On Key Technologies Of Root End Grinder For Wind Turbine Blades

As a green energy(wind energy)of wind power equipment,wind turbine's design and development are highly valued.The assembly accuracy of wind turbine blades and hubs directly affects the reliability and efficiency of wind turbines.In this paper,an end root grinding machine is designed to process the blade root end,which is used to ensure the shape and position error of the blade root end.In this paper,the grinder is divided into three parts firstly: the host part,the hydraulic system and the electrical components.Then,according to the functional requirements of the grinder,focusing on researching the key technology of the host part and hydraulic system,and a prototype is made.The grinding precision of end grinder is the most important technical index for end grinder.In this paper,the mathematical model of the parts is established,and the theoretical error of the parts which is synthesized with the standard deviation of the method is analyzed according to the structure of the grinder and the related theory and technical data.Due to the alternating load in the process of end grinder,it is necessary to analyze the dynamic characteristics.In this paper,the finite element analysis software is used to analyze the modal and harmonic response of the grinder firstly,then the first six order vibration modes and the corresponding natural frequencies,and the steady state response when the load changes by sinusoidal law of the grinder are obtained.Finally,the grinding experiment of prototype is carried out and the flatness of the grinding surface is measured.The results show that the integrated precision and steady-state response of the designed root end grinding machine meet the design requirements.