Experimental research on dynamic characteristics of a hybrid gas bearing-rotor system for high-speed permanent magnet machine

摘要：

　　An experiment on the vibrational characteristics of a hybrid gas bearing-rotor system in a 45 kW high-speed permanent magnet machine test rig is conducted.Nonlinear methods of measurements and analyses, including bifurcation maps, frequency spectra, and axis orbits, are adopted to evaluate sub-synchronous vibration in rotor acceleration.The effects of bearing supply pressure and speed accelerating rates on the stability of the gas bearing-rotor system are determined.Experimental results show that half-speed whirling of the gas film is eliminated and the start of gas film whipping is delayed by using the appcopriate bearing supply pressure plan,thereby improving stability.Meanwhile power frequency vibrational amplitude is the smallest during the acceleration process, including the critical speed, when the appropriate speed accelerating rates are employed.

关键词： vibration hybrid gas bearing increasing speed rate bearing supply pressure stability

作者: Dongjiang Han Jinfu Yang Changting Chen Changliang Tang Jiamin Geng

作者单位: Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing, China Harbin Dongan Engine Group Co, Harbin, China

会议类型: 国际会议

会议名称: the International Conference Vibroengineering-2014

会议地点: 贵阳

会议语种:英文

页码: 51-56

在线出版日期: 2014-11-07（万方平台首次上网日期，不代表论文的发表时间）