Dynamic Stability Study of Static Gas Bearing for Small Cryogenic Turbo-Expander

• 作者: 付豹 庄明 张启勇 李姗姗 王学敏
• 来源期刊: 等离子体科学和技术：英文版
• 学科: 工学
• 关键词: 动态稳定性 气体轴承 低温透平膨胀机 转子系统 设计速度 不平衡响应 Bode图 临界转速
• 年，卷（期）: 2011,（4）
• 所属期刊栏目: FUSION ENGINEERING
• 页码范围: 506-512
• 页数: 7页
• 分类号: TH133.35|TB653
• 语种: 英文

摘要

An experimental method is presented to analyze the dynamic stability of the gas bearing for small cryogenic turbo-expanders. The rotation imbalance response and the shape of the rotor orbit were obtained for different speeds up to 110,000 rpm, and the critical speed of the rotor-bearing system was determined by a Bode diagram. An FFT signal analytical method was applied to identify the resonance frequency, and the waterfall plot was presented. During the whole process of speeding up to the designed speed of 110,000 rpm, the rotor-bearing works stably with no whirl instability, which is validated in a waterfall plot. Also, the tested rotor-bearing model was analyzed theoretically. It was proved that the experimental results were highly consistent with those of theoretical calculations. Thus the experimental method proposed here to analyze the dynamic stability of the gas bearing is feasible.

作者信息

序号	姓名	单位	发文数	被引次数	H指数	G指数
1	付豹	中国科学院合肥物质科学研究院	27	101	7.0	8.0
2	庄明	中国科学院合肥物质科学研究院	47	131	7.0	8.0
3	张启勇	中国科学院合肥物质科学研究院	24	75	5.0	7.0
4	王学敏	中国科学院合肥物质科学研究院	13	75	5.0	8.0
5	李姗姗	中国科学院合肥物质科学研究院	14	81	5.0	9.0