Session: CIE-01-01 AMS: Advanced Modeling and Simulation (AMS General)

Paper Number: 142017

142017 - Hydraulic-Mechanical Coupled Simulation of 2D Micromotion in Variable Displacement Vane Pumps for Engine Lubrication 

Variable displacement vane pumps are widely used for lubrication in internal combustion engines. The purpose of this study is to introduce a simulation methodology based on coupling the lumped parameter hydraulic model and the multibody mechanical model. The principle underlying the method consists of calculating the forces on the moving elements in the hydraulic model and letting the multibody model calculate the displacements of the bodies. The advantage of this approach lies in the assessment of 2D micromovements resulting from clearances of the vanes relative to other mechanical components of the pump core. It allows simulating the detachment of vanes from the stator track, their tilt in the rotor slots, as well as the mutual interaction between vanes through the underneath floating rings. Simulations revealed two distinct behaviors depending on the operating conditions. At low speeds, a strong interaction between the vanes and the rings was observed. In particular, the rings are maintained in an almost constant position by the thrust of the vanes. Conversely, at high speeds, all vanes remain in constant contact with the stator track, and the rings are completely floating. The model is suitable for enhancing pump design, as forces exchanged by the mechanical parts can be calculated more realistically.

Presenting Author: Massimo Rundo Politecnico di Torino

Presenting Author Biography: Massimo Rundo received his MSc degree in mechanical engineering from the Politecnico di Torino, Italy, in 1996. After graduation, he worked as a visiting researcher, and later as a research fellow, at the Fluid Power Research Laboratory of the Politecnico di Torino, contributing to extensive research projects on positive displacement pumps. In 2005 he joined the faculty at the Department of Energy as assistant professor. He is currently an associate professor of fluid power. His research activity is primarily focused on modelling, simulation and testing of fluid power components and systems.

Authors:

Massimo Rundo Politecnico di Torino
Raffaele Squarcini Pierburg Pump Technology Italy S.p.A.