Journal of Mechanical Science and Technology

The Korean Society of Mechanical Engineers (대한기계학회)
권호 표지

Design of Port Plate in Gerotor Pump for Reduction of Pressure Pulsation

  • Kim Sang-Yeol (Department Mechanical and Intelligent Systems Engineering, Pusan National University) ;
  • Nam Yun-Joo (Department Mechanical and Intelligent Systems Engineering, Pusan National University) ;
  • Park Myeong-Kwan (Research Institute of Mechanical Technology, School of Mechanical Engineering, Pusan National University)
  • Published : 2006.10.01
Download PDF
⟨ Previous Next ⟩

Abstract

The pressure pulsation due to the gear geometry of the gerotor (generalized rotor) pump mainly occurs in an instant that the chamber of the gerotor enters the delivery port and leaves the suction one. Such a pressure pulsation may result in undesirable vibration and noise of pump components as well as cavitation in hydraulic system. Therefore, it is very important to examine the pressure characteristic of the gerotor pump at its design and analysis stages. In this paper, in order to reduce the pressure pulsation in the gerotor pump, the port plate with the relief grooves is designed by referring to as notch of vane pump and relief groove of piston pump. A series of the theoretical analyses on the pressure pulsation is performed in consideration of various design parameters of the port plate, including the installation positions of the port inlet/outlet and the groove width, and the operating conditions such as rotational velocity and delivery pressure.

Keywords

References

  1. Beard, J. E., Pennock, G. R. and Stanisic, M. M., 1989, 'The Effects of the Design Parameters on the Generated Curvature and Displacement of Epitrochoidal Gerotor Pumps,' Transactions on Society of Automotive Engineers, No. 891831
  2. Beard, J. E., 1992, 'The Effects of the Generating Pin Size and Placement on the Curvature and Displacement of Epitrochoidal Gerotors,' Mechanism and Machine Theory, Vol. 27, No.4, pp. 373-389 https://doi.org/10.1016/0094-114X(92)90030-L
  3. Colbourne, J. R., 1974, 'The Geometry of Trochoid Envelopes and Their Application in Rotary Pumps,' Mechanism and Machine Theory, Vol. 9, pp.421-435 https://doi.org/10.1016/0094-114X(74)90025-1
  4. Demenego, A., Vecchiato, D., Litvin, F. L., Nervegan, N. and Manco, S., 2002, 'Design and Simulation of Meshing of a Cycloidal Pump,' Mechanism and Machine Theory, Vol. 37, No.3, pp. 311-332 https://doi.org/10.1016/S0094-114X(01)00074-X
  5. Gamez-Montero, P. J. and Codina Macia, E., 2000, 'Fluid Dynamic Behaviour of an Internal Rotary Pump Generated by Trochoidal Profiles,' Proceeding of 1st FPNI-PhD Symposium, Hamburg, pp. 33-47
  6. Harris, R. M., Edge, K. A. and Tilley, D. G., 1994, 'The Suction Dynamics of Positive Displacement Axial Piston Pumps,' ASME, Journal of Dynamic Systems, Measurement, and Control, Vol. 116, pp.281-287 https://doi.org/10.1115/1.2899221
  7. Harrison, A. M. and Edge, K. A., 2000, 'Reduction of Axial Piston Pump Pressure Ripple,' Journal of Systems and Control Engineering (Part I), Vol. 214, No. 1, pp. 53-63 https://doi.org/10.1243/0959651001540519
  8. Kim, D. -I., Ahn, H. -S, and Choi, D. -H., 2000, 'Stress Analysis of Epitrochoidal Gerotor for Hydraulic Motor,' Transactions of the Korean Society of Mechanical Engineering (Part A), Vol. 24, No.4, pp. 963-971
  9. Kim, K. -D., Cho, M. -R., Han, D. -C., Choi, S. -H. and Jang, J. -S., 1998, 'An Analytical Study on the Pressure Ripples in a Positive Displacement Vane Pump,' Transactions of the Korean Society of Mechanical Engineering (Part A), Vol. 22, No. 11, pp. 1964-1998
  10. Kim, K. D., Cho, M. R., Han, D. C., Choi, S. J. and Moon, H. J., 1998, 'A Study on the Role of Notch and Radius Reduction Ratio in the Balanced Type Vane Pump,' Journal of the Korean Society of Precision Engineering, Vol. 15, No. 1, pp. 87-93
  11. Litvin, F. L. and Feng, P. -H., 1996, 'Computerized Design and Generation of Cycloidal Gearings,' Mechanism and Machine Theory, Vol. 31, No.7, pp.891-911 https://doi.org/10.1016/0094-114X(95)00115-F
  12. Manco, S., Nervegna, N., Rundo, M., Armenio, G., Pachetti, C. and Trichilo, R., 1998, 'Gerotor Lubrication Oil Pump for IC Engines,' Transactions on Society of Automotive Engineers, No. 982-689
  13. Manfred, C. and Adam, L., 2001, 'Distribution of Loads in Cycloidal Planetary Gear (CYCLO) Including Modification of Equidistant,' 16th European Mechanical Dynamics User Conference, Berchtesgaden, pp. 1 - 11
  14. Manring, N. D., 2000, 'The Dischanrge Flow Ripple of an Axial-Piston Swash-Plate Type Hydrostatic Pump,' Journal of Dynamic Systems. Measurement and Control. Vol. 122. No.2. pp. 263-268 https://doi.org/10.1115/1.482452
  15. Marnring, N. D., 2003, 'Valve-Plate Design for an Axial Piston Pump Operating at Low Displacement,' ASME, Journal of Mechanical Design, Vol. 125, pp.200-205 https://doi.org/10.1115/1.1541632
  16. Mimmi, G. and Pennacchi, P., 1997, 'Internal Lobe Pump Design,' Transactions of the CSME, Vol. 21, No.2, pp. 109-121
  17. Saegusa, Y., Urashima, K., Sugimoto, M., Onoda, M. and Koiso T., 1984, 'Development of Oil-Pump Rotors with a Trochoidal Tooth Shape,' Transactions on Society of Automotive Engineers, No. 840-454