CAJ | 학술논문

金属飞轮功率密度大，可靠性高，是我国推广飞轮储能技术应用的重要途径。本文综合考虑应力强度、金属疲劳、储能总量、储能密度和加工工艺，依托有限元计算优化金属飞轮设计，以应对不同工况要求。飞轮材料选用35CrMoA，设计储能量大于20 kW·h。频繁充放电飞轮采用4倍安全系数，具备高可靠性；高速待机飞轮以疲劳极限强度作为设计准则，平衡储能量和寿命。计算对比发现，“哑铃”形截面有利于实现轻质量大转动惯量，相同储能量下降低轴承负荷。此外，文章依托模块化设计思想，提出叠层铆合飞轮设计，评估轴孔螺孔应力集中影响。上述讨论为低速大功率金属飞轮进一步设计和量产化提供了有力参考。
금속비륜공솔밀도대，가고성고，시아국추엄비륜저능기술응용적중요도경。본문종합고필응력강도、금속피로、저능총량、저능밀도화가공공예，의탁유한원계산우화금속비륜설계，이응대불동공황요구。비륜재료선용35CrMoA，설계저능량대우20 kW·h。빈번충방전비륜채용4배안전계수，구비고가고성；고속대궤비륜이피로겁한강도작위설계준칙，평형저능량화수명。계산대비발현，“아령”형절면유리우실현경질량대전동관량，상동저능량하강저축승부하。차외，문장의탁모괴화설계사상，제출첩층류합비륜설계，평고축공라공응력집중영향。상술토론위저속대공솔금속비륜진일보설계화양산화제공료유력삼고。
Adopting metallic flywheels is an important way to promote the applications of flywheel energy storage for its superiorities in power density and reliability. This study is aimed to design and optimize metallic flywheel with FEM, considering stress intensity, metal fatigue, energy storage capacity, energy density and processing technology comprehensively. The designed energy capacity was beyond 20 kW·h using the alloy 35CrMoA. Frequent charge-discharged flywheels use 4 times the safe coefficient to realize high reliability, while high-speed standby flywheels took Fatigue ultimate strength as the criterion to balance the energy capacity and lift-time. By contrast, the dumbbell-shaped cross-section was conducive to a larger moment of inertia with a lighter weight, benefitting for reducing the bearing load. Besides, this paper proposed a novel design of lamina-riveted flywheel, and accessed the influence of the axle hole and screw holes. All the above discussion provided available references for the further design and mass production of low-speed/high-power metallic flywheels.