摘要
冷压缩机作为液氦/超流氦低温制冷系统的核心部件之一,为了保证其运行的安全性和高效率,冷压缩机转子设计要能同时满足转子运行速度高、隔热效果好的要求,在转子设计时既要考虑转子动力学特性,又要考虑转子隔热效果。基于大型有限元分析软件ANSYS,分析了不同结构下的冷压缩机转子的临界转速,使设计额定转速工作在一阶弯曲临界转速以下,且留有一定裕量;为减小计算复杂程度,采用了热阻分析方法。将动力学仿真和热阻分析综合考虑,结果表明,通过在转子中设计局部中空薄壁结构并选择合适的尺寸,可得到优化的转子结构。
Cold compressor is one of the core parts of liquid helium or superfluid helium cryogenic cooling system. In order to guarantee the safety and high efficiency, cold compressor rotor has to work at the high speed and with good heat insulation. This means that the rotor dynamics should be considered including the rotor insulation in the cold compressor rotor design. Based on the finite element analysis software ANSYS, the critical speed of different size cold compressor rotors was analyzed. The nomi- nal speed was defined which should be less than the first - order bending critical speed and there was a certain margin. To reduce computation complexity, a method for analyzing thermal resistance was used. After comprehensive consideration for the rotor dy- namics simulation and thermal resistance, the results indicate that an optimal compressor rotor structure can be figured out by the design of local hollow thin - walled structure and appropriate size selection.
作者
魏操兵
伍继浩
张舒月
吕翠
李青
Wei Caobing;Wu Jihao;Zhang Shuyue;Lv Cui;Li Qing(State Key Laboratory of Technologies in Space Cryogenic Propellants （Technical Institute of Physics and Chemistry, Chinese Academy of Sciences）, Beijing 100190,China;University of Chinese Academy of Sciences, Beijing 100049, China)
出处
《低温与超导》
CAS
北大核心
2018年第4期6-10,共5页
Cryogenics and Superconductivity
基金
国家财政部专项基金(ZDYZ2014-1)
航天低温推进剂技术国家重点实验室基金项目(SKLTSCP1703)资助
关键词
冷压缩机
动力学分析
隔热
转子优化设计
Cold compressor, Rotor dynamics, Heat insulation, Rotor design optimization
