Ball–cylinder pair is the key friction pair of eccentric ball piston pumps. The reliability of ball–cylinder pair is significant to the performance of ball piston pump. The amended point contact elastohydrodynamic lubrication (EHL) model of ball–cylinder pair is developed in this paper. Non-Newtonian behavior of lubricants and slide-roll feature of ball–cylinder pair are considered. Pressure distribution and film profile of ball–cylinder pair are calculated. The characteristics of friction and lubrication are analyzed. The result shows that a film dimple takes place at the inlet of the contact, corresponding to a pressure mutation. For friction coefficient, with the increase of entrainment velocity of ball–cylinder pair, the curve goes down first and then goes up to the peak. After that, the curve decreases slightly to stability. Also, the curve decreases first and increases slowly to stability with respect to the normal load of ball–cylinder pair. Tendency of the curves representing friction coefficient is different from the classical Stribeck curve. The simulating results are validated by test.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.