TY - JOUR
T1 - Lubrication characteristics of ball-cylinder pair in eccentric ball piston pumps
AU - Zhao, Hongmei
AU - Wei, Chao
AU - Jing, Chongbo
AU - Lin, Shuo
N1 - Publisher Copyright:
© 2015 Institution of Mechanical Engineers.
PY - 2016/6
Y1 - 2016/6
N2 - 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.
AB - 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.
KW - Eccentric ball piston pumps
KW - ball-cylinder pair
KW - lubrication characteristics
KW - non-Newtonian fluids
KW - slide-roll feature
UR - http://www.scopus.com/inward/record.url?scp=84968739596&partnerID=8YFLogxK
U2 - 10.1177/1350650115610356
DO - 10.1177/1350650115610356
M3 - Article
AN - SCOPUS:84968739596
SN - 1350-6501
VL - 230
SP - 680
EP - 689
JO - Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology
JF - Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology
IS - 6
ER -