The Influence of Radial and Axial Gaps on Volumetric Efficiency of External Gear Pumps

The design of gear pumps and motors is focused on more efficient units which are possible to achieve using advanced numerical simulation techniques. flow that appears inside the pump very complex, despite simple itself. identification fluid phenomena in areas pump, considering entire range operating parameters, a major challenge. This paper presents results studies leakages axial radial gaps an external carried out for different gap shapes sizes, as well various parameters. To investigate processes affect efficiency visualize during pump’s operation, CFD model was built. It allows detailed analysis impact gears’ eccentricity pressure build-up circumference. Performed simulations made it indicate relationship between resulting from gap, has not been presented so far. verify model, experimental investigations volumetric were out. Good convergence obtained; therefore, universal tool study pumps.