采用新型电磁动平衡装置的动平衡研究

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针对高速转子不平衡产生振动超标的问题,设计了一种基于静磁场的电磁在线动平衡装置;详细讨论了该动平衡装置的基本工作原理和设计方法;通过有限元软件ANSYS建立实体模型,计算并分析了设计参数对该装置所施加电磁力的影响.以转子的动力学有限元模型为基础,通过缩减不平衡响应与不平衡量之间的关系矩阵,采用无试重法识别出转子集中不平衡量的大小,最后通过搭建动平衡试验台实现了转子的动平衡,从而验证了该新型电磁动平衡装置的有效性.研究结果表明,该动平衡装置可以产生用于动平衡的电磁力,并且能够根据无试重法识别出的不平衡量值施加电磁力于高速转子,有效地抑制振动幅值.由于受结构和工作原理的限制,该电磁动平衡装置更适用于高速精密转子的在线动平衡. To suppress rotor vibration due to imbalance, an active online electromagnetic balancing device is developed. The magnetic-field distribution and electromagnetic force generated by the device are analyzed via finite-element modeling by using the commercial software ANSYS. Based on the dynamic finite-element model of a rotor, the relationship matrix between unbalanced response and imbalance is reduced to identify the equivalent concentrated imbalance. This electromagnetic balancing device is verified experimentally. The results show that the electromagnetic force from the electromagnetic balancing device effectively suppresses the vibration due to imbalance. This kind of electromagnetic dynamic balancing device is especially suitable for high-speed and high precision online balancing.