储能飞轮转子轴承系统动力学设计与试验研究

飞轮储能系统通过飞轮升速和降速来实现电能储存和释放,研究飞轮转子轴承系统固有频率预计、临界转速设计、动平衡等动力学问题。采用永磁轴承与螺旋槽动压轴承的混合支承方式,建立储能飞轮强度、动力学和充放电特性试验研究装置,进行了动平衡、阻尼支承调整、飞轮储能系统损耗和发电量测试等试验,试验飞轮达到设计转速42.0 kr/min,总储能497 W·h,从42.0 kr/min降速到13.8 kr/min,可用放电能达到290 W·h。

DYNAMICS DESIGN AND EXPERIMENT STUDY OF THE ROTOR-BEARING SYSTEM OF A FLYWHEEL ENERGY STORAGE SYSTEM

The rise and fall of the rotating speed of the flywheel realize the storage and release of the electrical energy in a flywheel energy storage system. The rotor dynamics problems such as the natural whirl frequencies and the critical speeds and the rotor balancing are dealt with. The low cost hybrid support composed of the permanent magnetic bearing and the spiral groove hydrodynamic bearing is employed in the experiments which are proceeded to test the rotor strength and the characteristics of the charging and discharging of the flywheel energy storage system. The damping of the lower support is adjusted, the flywheel is balanced and the energy loss and the generating of the electricity are tested in the experiments. The flywheel reaches its deigned rotating speed of 42.0 kr/min and stores energy of 497 W-h. The usable electricity arrives at 290 W-h when the flywheel falls from 42.0 kr/min down to 13.8 kr/min.