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TECHNICAL PAPERS

The Theoretical Flow Ripple of an External Gear Pump

[+] Author and Article Information
Noah D. Manring, Suresh B. Kasaragadda

Mechanical and Aerospace Engineering Department, University of Missouri–Columbia, Columbia, MO 65211

J. Dyn. Sys., Meas., Control 125(3), 396-404 (Sep 18, 2003) (9 pages) doi:10.1115/1.1592193 History: Received February 01, 2002; Revised November 06, 2002; Online September 18, 2003
Copyright © 2003 by ASME
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References

Frith,  R. H., and Scott,  W., 1996, “Comparison of an external gear pump wear model with test data,” Wear, 196, pp. 64–71.
Koc,  E., and Hooke,  C. J., 1997, “An experimental investigation into the design and performance of hydrostatically loaded floating wear plates in gear pumps,” Wear, 209, pp. 184–192.
Koc,  E., 1994, “Bearing misalignment effects on the hydrostatic and hydrodynamic behaviour of gears in fixed clearance end plates,” Wear, 173, pp. 199–206.
Koc,  E., 1991, “An investigation into the performance of hydrostatically loaded end-plates in high pressure pumps and motors: Movable plate design,” Wear, 141, pp. 249–265.
Foster,  K., Taylor,  R., and Bidhendi,  I. M., 1985, “Computer prediction of cyclic excitation sources for an external gear pump,” Proc. Inst. Mech. Eng., Part C: Mech. Eng. Sci., 199, No. B3, pp. 175–180.
Chen,  C. K., and Yang,  S. C., 2000, “Geometric modeling for cylindrical and helical gear pumps with circular arc teeth,” Proc. Inst. Mech. Eng., Part C: J. Mech. Eng. Sci., 214, pp. 599–607.
Mitome,  K., and Seki,  K., 1983, “A new continuous contact low-noise gear pump,” Journal of Mechanisms, Transmission and Automation in Design, 105, pp. 736–741.
Manring,  N. D., 2000, “The discharge flow ripple of an axial-piston swash-plate type hydrostatic pump,” ASME J. Dyn. Syst., Meas., Control, 122, pp. 263–268.
Ivantysyn, J., and Ivantysynova, M., 2001, Hydrostatic Pumps and Motors, Akademia Books International, New Delhi.
Norton, R. L., 2000, Machine Design—An Integrated Approach, 2nd ed., Prentice-Hall, Inc., Upper Saddle River, NJ.

Figures

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Gear pump configuration
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Control volume of the discharge chamber
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Gear mesh geometry at the first point of tooth contact
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Gear mesh geometry at an intermediate point of tooth contact
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Gear pumps of the same displacement designed with different numbers of teeth on the driving and driven gears
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Dimensionless center distance variation for gear pumps of the same displacement utilizing various combinations of teeth on the driving and driven gears
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The theoretical flow pulse solution (Eq. (7)) for the pumps shown in Fig. 5. (Note: these results have been normalized using the average flow rate of the pump. As the number of teeth on the driving gear increases, the flow pulse amplitude is reduced.)
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The theoretical flow pulse amplitude (Eq. (21)) normalized by the average flow rate of the pump. As the number of teeth on the driving gear increases, the flow pulse amplitude is reduced.
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FFT results for the flow pulse of pumps with equal numbers of teeth on the driving and driven gear
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FFT results for the flow pulse of pumps with 13 teeth on the driving gear 13 to 16 teeth on the driven gear
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FFT results for the flow pulse of pumps with 14 teeth on the driving gear 13 to 16 teeth on the driven gear
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FFT results for the flow pulse of pumps with 15 teeth on the driving gear 13 to 16 teeth on the driven gear
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FFT results for the flow pulse of pumps with 16 teeth on the driving gear 13 to 16 teeth on the driven gear
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The geometry of the involute tooth profile

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