An Analysis of the Effects Causing an Asymmetric Behavior of the Lateral Lubricating Films of External Spur Gear Machines

• DOI: 10.1115/fpmc2021-68605
• Publication Date: 2021-12-13T20:17:23Z
• Authors: Kaeul Lim; Federico Zappaterra; Swarnava Mukherjee; Andrea Vacca
• Keywords: Leakage (economics); Counterintuitive

Abstract The torque efficiency and flow of positive displacement machines for fluid power applications are determined by the behavior their internal lubricating interfaces. This aspect has motivated development tribological simulation tools analysis these level details can provide allows explaining some counterintuitive aspects that occur in paper focuses on a significant example, which is high asymmetric films occurring pressure compensated external gear pumps. These units often designed with symmetric axial balancing compensation system. Notwithstanding, there differences between lateral gaps be explained only considering mutual effects film material deformation. To study this problem, utilizes tool Multics-HYGESim developed authors’ research team. Two analyses performed: first one imposing symmetry gap, common assumption discussed literature; second (referred to as “full configuration”), holds gap. An experimental set-up used validate modeling assumptions based measurements drain leakage volumetric efficiency. main findings uneven distribution leakages, indicates an gap unit.