Abstract: An assumption is proposed, based on the analysis of the dynamic properties, that the oil film lying between the camshaft and follower surfaces can be regarded as a system with mass, spring and damping. A corresponding dynamic numerical model and a kinematic differential equation are established. And the calculations and analysises of the film thickness, the equivalent stiffness of the film and the dynamic responses of cam mechanisms with flat-faced followers are done and their results are of benefit to the design of cam mechanisms at high velocity.

Key words: Cam mechanisms, Dynamic elastohydrodynamic lubrication, Dynamic response, Equivalent stiffness of film, Film thickness