上游充通大学 SHANGHAI JIAO TONG UNIVERSITY Principles of Operation Rolling Friction(Rolling Contact Bearing滚动轴承) Roller/ball (滚子球) Outer Ring(外圈) Lubrication (润滑剂) Inner Ring(内圈) Sliding Friction(Sleeve Bearing滑动轴承) Hydrodynamic lift is Sleeve(轴套) generated by fluid being dragged into gap by Lubrication viscous shear Circumferential pressure profile 33 Principles of Operation Rolling Friction (Rolling Contact Bearing 滚动轴承) Roller/ball （滚子/球） Lubrication （润滑剂） Outer Ring（外圈） Inner Ring（内圈） Sliding Friction (Sleeve Bearing 滑动轴承) Sleeve（轴套） Lubrication Circumferential pressure profile Hydrodynamic lift is generated by fluid being dragged into gap by viscous shear