Design And Research Of Loading Device For Ground Test Platform Of Large Wind Turbine

Wind energy,as a renewable resource,has been paid more and more attention in recent years.Wind power generation has been developed rapidly,and the installed capacity and scale of wind turbines have been increasing.Due to the harsh working environment of large wind turbine,it is difficult to carry out physical tests on the work site,and there are hidden dangers.Therefore,it is of great significance to develop a ground test platform for large wind turbine.Aiming at the development of the ground test platform for large wind turbine,the loading device is designed and studied in this paper.Firstly,according to the basic structure and working load characteristics of the large wind turbine,the loading device of the 2MW test platform is designed,and the main structure and composition of the test platform are determined.3d CAD mechanical design was carried out for the main parts of the loading device,the loading flange assembly and the base of the driving motor were designed and studied,the finite element strength analysis and structural optimization were carried out for the main stressed parts,and the selection design of the driving motor and coupling was carried out.Then,according to the working characteristics and design requirements of the six-dof parallel loading device,the hydraulic system design of the loading device is completed,and the main hydraulic components are designed,calculated and selected.The simulation model of hydraulic system based on AMESim software is established to realize the simulation test of hydraulic system.Based on AMESim simulation analysis,the pressure fluctuation and loading error of hydraulic system are studied.The influence of accumulator,pipe diameter optimization and PID controller on hydraulic system performance is studied.Finally,a virtual prototype model of the loading device on the test platform based on Adams software is established,and the dynamic performance of the loading device is simulated.The model of the conversion relation between the load at the hub center of the loading device and the force of six hydraulic cylinders is derived,and the conversion coefficient of the model is obtained through the virtual prototype test.The equivalent deformation model of hub center considering the influence of loading device’s stress and deformation is proposed and a flexible virtual prototype of loading device based on axle sleeve force connection is established.Considering the coupling effect of mechanical system and hydraulic system,a virtual prototype for the co-simulation of the flexible mechanical system and hydraulic system of the loading device was established.Based on Adams and AMESim software platforms,the co-simulation of the loading device was realized,and the overall dynamic performance of the loading device of the wind turbine ground test platform was simulated.