摘要
利用自制磁流变液及其可控简单、成本低等优点,提出了一种使用磁流变液润滑的可控浮环轴承。采用Herschel-Bulkley模型对包含剪切稀化效应的磁流变液剪切特性进行了建模;通过自制的磁流变仪测试系统测试并识别了所制磁流变液的模型参数;利用识别的参数分析了磁流变液润滑浮环轴承的动态特性及可控性;分析了采用此种轴承的转子系统的抑振效果。结果表明,磁流变液润滑浮环轴承在外加磁场后有较好的振动抑制作用。同时,相较于磁流变液润滑普通滑动轴承,磁流变液润滑浮环轴承有更好的抑振效果,且减小了轴颈摩擦力矩,降低了摩擦功耗。
A controllable floating ring bearing （ FRB ） lubricated with magnetorheological fluid （ M R F ） w a s proposed due to its controllability and low cost of the self-made M R F . T h e Herschel-Bulkley （ H B ） model was introduced to model the behavior of MRF under shear circumstances with the shear-thinning effect incorporated. A magnetorheometer was set up to measure the properties of the MRF and then the nonlinear regression method was adopted to identify the HB model parameters of the tested M R F . W i t h these parameters, d y n a m i c behaviors of the floating bearing along with its controllability of the rotor system was analyzed. Results demonstrate that the MRF lubricated FRB is capable of suppressing rotor vibration amplitudes. And compared to an MRF lubricated common journal bearing, the MRF lubricated FRB performances better in rotor vibration control, and bears a lower journal friction while maintaining the ability to alter dynamic characteristics.
作者
王小虎
陆雯
李鸿光
孟光
WANG Xiaohu LU Wen LI Hongguang MENG Guang(Key State Laboratory of Mechanical System and Vibration, Shanghai Jiao Tong University, Shanghai 200240, Chin)
出处
《振动与冲击》
EI
CSCD
北大核心
2017年第12期18-24,共7页
Journal of Vibration and Shock
基金
国家自然科学基金(11427801
11372176)
关键词
磁流变液
浮环轴承
转子系统
振动控制
magnetorheological fluid
floating ring bearing
rotor s y s t e m
vibration control
