Thermodynamic Lubrication Performance and Stability for a Deep/Shallow Pocket Hybrid Bearing Considering Bubbly Oil
In order to research on the influence of thermal effect and bubbly lubricant oil on the bearing performance and rotor system stability.A hybrid bearing with deep and shallow pockets was selected as a study object,and its thermodynamic models including Reynolds equation,energy equation,viscosity-bubble volume fraction equation and temperature-viscosity equation were established.The pressure distribution,temperature and viscosity distribution were calculated considering the influence of the bubble using the classical numerical method,and the lubricant characteristics were analyzed.The motion model was derived for a single mass flexible rotor supported in two hybrid bearings,the system thermal instability was simulated and discussed further when the bubble volume fraction is lower than 5.0%.The results show that there exists an obvious non-uniformed temperature distribution in the lubricant film,and the bearing lubrication parameters are climbing with the rising of the bubble volume fraction,and the thermal effect weakens the bearing load capacity and friction loss,whereas it increases the flow volume rate.The stability parameters drop when the thermal effect is considered,and they would be improved with the consideration of bubble within the limited bubble proportion range.
Hybrid bearing Thermodynamic lubrication Thermal instability Bubbly lubricant oil
Hong Guo Shuai Yang Ningning Wu Ruizhen Li
School of Mechanical Engineering,Zhengzhou University,Zhengzhou 450001,China
国际会议
浙江湖州
英文
189-201
2019-08-12（万方平台首次上网日期，不代表论文的发表时间）