全息谱技术在轴系现场动平衡方法中应用  

A Study of Methods for an On-site Shafting Dynamic Balance Based on a Holographic Spectrum Technology

作　　者：刘石[1] 屈梁生[2] 

机构地区：[1]广东电网公司电力科学研究院,广东广州510600 [2]西安交通大学机械工程学院,陕西西安710049

出　　处：《热能动力工程》2009年第1期24-30,共7页Journal of Engineering for Thermal Energy and Power

基　　金：国家自然科学基金资助项目(50475084)

摘　　要：现场动平衡是处理汽轮发电机组振动问题的一项关键技术。传统平衡方法通常基于单传感器信息,将垂直和水平振动视为两个独立分量。实际上转子的运动是一种复杂的空间运动,仅用单向传感器测量是不能客观和可靠地反映转子空间运动状态的,必须将传感器信息加以融合。提出了基于多传感器信息融合的现场全息动平衡方法,其本质是将信息融合技术与柔性转子动平衡技术充分结合,同时应用先进的计算机模拟和遗传算法优化,来简化平衡操作,提高平衡的精度和效率。分析了基于单传感器平衡方法的缺点,给出了轴系全息动平衡方法的原理,并在多台300MW汽轮发电机组现场动平衡中验证了该方法的有效性。On-site dynamic balance is one of the key technologies for coping with the vibration faults of turbogenerator units. Tradi-tional balancing methods are usually based on information from a single sensor with vertical and horizontal vibrations being regarded as two separate components. In fact,the motion of rotors is a kind of complicated spacial movement. It is impossi-ble for measurements made by using only unidirectional sensors to objectively and reliably reflect the movement status of the rotors. The information from the sensors must be fused. The authors have presented an on-site dynamic balance method based on a fusion of information from a variety of sensors. The essence of the matter consists in fully integrating the infor-mation fusion technology with flexible rotor dynamic balance technology. In the meantime,advanced computer simulation and a genetic algorithm-based optimization are employed to simplify balanced operations,thus enhancing the balance accu-racy and efficiency. The demerits of the balance method based on a single sensor were analyzed,and the working principle of a shafting holographic dynamic balance method was described. In addition,the effectiveness of the method in question has been verified by the on-site dynamic balance of several 300 MW turbogenerator units.

关 键 词：现场动平衡 全息谱 柔性转子 

分 类 号：TK263.6[动力工程及工程热物理—动力机械及工程]