中文摘要：

针对水轮机组的重量支承方式和存在的问题,对水轮机组转子系统磁悬浮承重进行研究,设计了一种永磁悬浮装置与电磁悬浮装置相结合的水轮机组转子承重系统.对混合磁悬浮水轮发电机组转子承重系统的结构进行设计时,采用永磁悬浮装置承担水轮发电机组的基本重力负荷,采用电磁悬浮装置承担水轮发电机组的重力可调负荷.考虑到高速运转的水轮发电机组运行的稳定性,系统并不全部浮起转子系统,而是分担转子系统的大部分轴向负荷（即减载）.对永磁材料和电磁装置进行了研究和选择,在永磁悬浮装置承重部分对气隙磁场强度与气隙厚度、永磁体体积等的关系进行了分析,对永磁悬浮力大小的影响因素进行了研究;在电磁悬浮部分对电磁悬浮力大小与电磁悬浮装置结构等的关系进行了分析.在此基础上,根据基本电磁理论和承重系统的构造,建立了电磁悬浮支承装置和永磁悬浮支承装置的数学模型.

英文摘要：

In order to understand weight support modes and problems of hydraulic turbine generator units,the magnetic levitation weight support of the rotor systems of hydraulic turbine generator units was studied. A hybrid rotor weight support system for hydraulic turbine generator units that combines a permanent magnetic levitation device and an electromagnetic levitation device was designed. During the structural design of the hybrid rotor weight support system,the basic gravity weight was supported by the permanent magnetic device,and the adjustable gravity weight was supported by the electromagnetic levitation device. Considering the stability of hydraulic turbine generator units under high-speed operation,the system bore most of the axial loads （rotor weight） instead of totally levitating the rotor. The permanent magnetic materials and electromagnetic device were studied and selected. For the permanent magnetic levitation device,the relationships between the air gap magnetic field intensity and parameters such as the air gap thickness and magnet size were analyzed,and the impact factors in the magnitude of the permanent magnetic levitation force were analyzed. For the electromagnetic levitation device,the relationship between the electromagnetic levitation force and the structure of the electromagnetic levitation device was analyzed. On this basis,the mathematical models for the electromagnetic levitation and the permanent magnetic levitation support devices were established according to fundamental electromagnetic theories and the structure of weight support systems.