| With the continuous development of the wind power industry,the installed capacity of large wind turbines is constantly updated,and the performance testing technology of the wind turbine before the hoisting is also updated and improved.The whole test of the fan depends on the multiple degree of freedom loading test platform.During the loading process,there will inevitably be a variety of displacement deviation need to be compensated.Therefore,in order to realize the loading system can simulate the actual wind flexible multiple degrees of freedom,to ensure the stability of the loading system and reduce vibration,design a more flexibility can realize coupling multiple direction deviation compensation is very important.In this paper,the dynamic characteristics of self lubricating bearing connecting rod coupling are studied deeply according to the loading condition of the six degree of freedom loading test platform of wind turbine.Based on the analysis of loading condition of six degrees of freedom loading test platform of wind turbine,the structural form of connecting rod coupling is conceived.The mathematical model of the coupling axial,radial and angular compensation is established according to the compensation posture which may occur in the working process of the connecting rod coupling.The mathematical model of geometric analysis,get the relationship between the best definition of coupling rod size and the amount of compensation and the components of coupling between dimensions,and through the PEO/E kinematics simulation correctness of the mathematical model is verified by simulation,and provides a theoretical basis for the design of production and application of coupling.The finite element analysis model of the coupling is established by PRO/E and ANSYA workbench CAD interaction,and the modal analysis of the shaft coupling system is carried out.The first twenty natural frequencies and mode shapes of the coupling are extracted,and the inherent property of the shaft joint is analyzed.The stability and reliability of the coupling are illustrated by the loading frequency of the loading system.Antithetical couplet shaft on the basis of the different exciting force(axial,radial and angular)under the harmonic response analysis,discusses the response coupling system under the different excitation force,further shows the rationality of the coupling linkage design.Critical speed analysis to fully understand the dynamic characteristics of shaft system coupling antithetical couplet.the critical speed analysis of the axle coupling system is carried out.According to the different compensation states of the coupling,different boundary conditions are set up,and the rationality of the axle coupling is further analyzed by Campbell diagram and the actual working speed of the coupling.Finally,a coupling vibration and rotor unbalance detection system is designed.Through the data acquisition and analysis,the shaft system can be verified more. |
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