Session: Pumps 2

Paper Number: 111670

111670 - Prediction of Housing Wear-in in External Gear Machine Considering Deformation Effects 

Initial housing wear-in is a key process for determining the overall efficiency of most of the high-pressure (up to 300 bar) external gear pumps and motors. The internal housing profile that results from the penetration of the gears during initial wear-in directly affects the volumetric efficiency of the pump or motor in operation. Therefore, an accurate prediction of such wear and its related effects during machine operation is an essential aspect for external gear machine simulation tools. However, current state-of-the-art tools either neglect this aspect or make heavy simplifications. This paper presents a new simulation approach for modeling wear-in developed within the Multics-HYGESim (HYdraulic Gear Machine Simulator) tool. The approach leverages the previously developed model to determine the radial micromotion of the gears, and it includes the aspects of the deformation of both the bushings and housings present in the unit. The paper considers the case of a 22 cm3/rev unit as a reference, for which detailed simulation results, including the quantification of the wear-in and its consequences on the unit efficiency, are presented. The proposed approach is validated by comparison with experimental measurements of wear profiles and unit's efficiency, showing a good agreement between simulation results and experimental data.

Presenting Author: Ajinkya Pawar Maha Fluid Power Research Center, Purdue University

Presenting Author Biography: Ajinkya Pawar is a third-year Ph.D. student at Maha Fluid Power Research Center, Purdue University from Lafayette, Indiana, United States. The author's research areas include modeling external gear pumps and motors.