氦气透平轴向磁力轴承承载力-转速的内在关系  

Relationship Between Load Capacity and Rotational Speed of Axial Magnetic Bearing in Commercial HTGR Helium Turbine System

作　　者：丁超[1] 杨小勇[1] 王捷[1] 于溯源[1] 

机构地区：[1]清华大学核能与新能源技术研究院,北京100084

出　　处：《原子能科学技术》2012年第B12期896-900,共5页Atomic Energy Science and Technology

基　　金：国家重大科技专项资助项目(ZX06901)

摘　　要：本文研究了轴向磁力轴承承载力与转速、材料强度之间的内在关系。轴向磁力轴承采用控制电流所产生的电磁力,使转子维持在悬浮工作位置不变,因此其工作原理决定了它的承载力与推力盘面积成正比。通过对推力盘的强度分析,找出了最大切应力和径向应力的位置。分析发现,推力盘的面积受轮缘处最大切应力的限制,与材料许用应力成正比、与转速成反比。本文给出的推力盘最大承载力与材料强度和最高转速的内在关系可用于指导氦气透平压气机轴向磁力轴承的设计。The relationship among load capacity,rotating speed and material strength of axial magnetic bearing was studied.It suspends the rotor at the working position with magnetic force produced by control current.Therefore its working principle determines that its load capacity is proportional to the area of thrust disk.The locations of maximum shear stress and radial stress were found respectively by stress analysis of thrust disk.The result shows that the area of thrust disc is restricted by the maximum shear stress at the flange,and is proportional to strength of materials and inversely proportional to rotating speed.The maximum load capacity of axial magnetic bearing is determined by material strength and rotating speed,and it can be applied to the design of axial magnetic bearing in helium turbine system.

关 键 词：高温气冷堆 氦气透平循环 轴向磁力轴承 承载力 

分 类 号：TL353[核科学技术—核技术及应用]