论文信息 - The Theoretical Flow Ripple of an External Gear Pump

The Theoretical Flow Ripple of an External Gear Pump

In this paper, the theoretical flow ripple of an external gear pump is studied for pumps of similar size using different numbers of teeth on the driving and driven gears. In this work, the flow ripple equation is derived based upon the flow of incompressible fluid across the changing boundaries of a control volume. From this method, it is shown that the instantaneous length of action within the gear mesh determines the instantaneous flow ripple. Using a numerical solution for the instantaneous length of action, different pump designs are compared. In summary, the results of this study show that it may be advantageous to design an external gear pump with a large number of teeth on the driving gear and a fewer number of teeth on the driven gear. This design configuration will tend to reduce both the physical pump size (without reducing the volumetric displacement of the pump) and the amplitude of the flow pulsation, while increasing the natural harmonic frequencies of the machine.Copyright © 2002 by ASME

Noah D. Manring | Suresh B. Kasaragadda | N. Manring

[1] Erdem Koç. Bearing misalignment effects on the hydrostatic and hydrodynamic behaviour of gears in fixed clearance end plates , 1994 .

[2] C. J. Hooke,et al. An experimental investigation into the design and performance of hydrostatically loaded floating wear plates in gear pumps , 1997 .

[3] K Foster,et al. Computer Prediction of Cyclic Excitation Sources for an External Gear Pump , 1985 .

[4] Shyue-Cheng Yang,et al. Geometric modelling for cylindrical and helical gear pumps with circular arc teeth , 2000 .

[5] Noah D. Manring,et al. The Discharge Flow Ripple of an Axial-Piston Swash-Plate Type Hydrostatic Pump , 2000 .

[6] W. Scott,et al. Comparison of an external gear pump wear model with test data , 1996 .

[7] Ken-ichi Mitome,et al. A New Continuous Contact Low-Noise Gear Pump , 1983 .

[8] Erdem Koç. An investigation into the performance of hydrostatically loaded end-plates in high pressure pumps and motors: movable plate design , 1991 .