TY - GEN
T1 - Lubrication and dynamic characteristics of a cylinder block in an axial piston pump
AU - Ahn, S. Y.
AU - Rhim, Y. C.
AU - Hong, Y. S.
PY - 2005
Y1 - 2005
N2 - Lubrication characteristics between a cylinder block and a valve plate in axial piston pumps play an important role in volumetric efficiency and durability of a hydraulic unit. In this paper, the finite element method is used for the computation of the pressure distribution between a cylinder block and a valve plate of the axial piston pump. Also, the Runge-Kutta method is applied to simulate the dynamics of a cylinder block of three-degrees of freedom motion. From the results of computation, two major conclusions are drawn. One is related to the fluid film characteristics between a cylinder block and a valve plate, and the other is related to the average leakage flow rate which is determined by the pressure gradient and the clearance near the discharge port. To confirm results of numerical simulation of cylinder block dynamics, experiment is conducted using three eddy-current type gap sensors, which are imbedded at the pump housing. Finally, a revised shape of a valve plate is proposed which increases the stability of the cylinder block dynamics and the volumetric efficiency of the pump based on numerical simulation.
AB - Lubrication characteristics between a cylinder block and a valve plate in axial piston pumps play an important role in volumetric efficiency and durability of a hydraulic unit. In this paper, the finite element method is used for the computation of the pressure distribution between a cylinder block and a valve plate of the axial piston pump. Also, the Runge-Kutta method is applied to simulate the dynamics of a cylinder block of three-degrees of freedom motion. From the results of computation, two major conclusions are drawn. One is related to the fluid film characteristics between a cylinder block and a valve plate, and the other is related to the average leakage flow rate which is determined by the pressure gradient and the clearance near the discharge port. To confirm results of numerical simulation of cylinder block dynamics, experiment is conducted using three eddy-current type gap sensors, which are imbedded at the pump housing. Finally, a revised shape of a valve plate is proposed which increases the stability of the cylinder block dynamics and the volumetric efficiency of the pump based on numerical simulation.
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U2 - 10.1115/wtc2005-63341
DO - 10.1115/wtc2005-63341
M3 - Conference contribution
AN - SCOPUS:33144456524
SN - 0791842029
SN - 9780791842027
T3 - Proceedings of the World Tribology Congress III - 2005
SP - 223
EP - 224
BT - Proceedings of the World Tribology Congress III - 2005
PB - American Society of Mechanical Engineers
T2 - 2005 World Tribology Congress III
Y2 - 12 September 2005 through 16 September 2005
ER -