This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
The Effects of the Design Parameters on the Generated Curvature and Displacement of Epitrochoidal Gerotor Pumps
Annotation ability available
Sector:
Language:
English
Abstract
The wear characteristics and, therefore, the failure rate of a gerotor are highly dependent upon the minimum radius of curvature of the generated shape of the working chambers. The paper shows that the minimum radius of curvature may he increased without increasing the overall size of the gerotor or substantially decreasing the pocket displacement. The design parameters that affect the radius of curvature are: the radii of the fixed and moving pitch circles, the radius of the generating pin, the distance from the center of the pitch circle containing the generating pin to the center of the generating pin, and the ratio of the pitch circles. The paper includes an equation for the pocket displacement as a function of these design parameters and the input angle. The paper also presents important relations between the curvature of the generated shape, the displacement, and the package size.
Recommended Content
| Technical Paper | Development of Oil-Pump Rotors with a Trochoidal Tooth Shape |
| Technical Paper | Modelling and Simulation of Gerotor Gearing in Lubricating Oil Pumps |
| Technical Paper | Flow Ripple in a Gerotor Pump |
Authors
Citation
Beard, J., Pennock, G., and Stanisic, M., "The Effects of the Design Parameters on the Generated Curvature and Displacement of Epitrochoidal Gerotor Pumps," SAE Technical Paper 891831, 1989, https://doi.org/10.4271/891831.Also In
References
- Colbourne J.R. “Reduction of the Contact Stress in Internal Pumps” Transactions of the ASME Journal for Industrial Engineering November 1296 1300 1976
- Colbourne J.R. “Gear Shape and Theoretical Flow Rate in Internal Gear Pumps” Transactions of the Candian Society of Mechanical Engineering 3 4. 215 223 1975
- Beard J. E. Hall S. S. Soedel W. “Hypotrochoidal Versus Epitrochoidal Gerotor Type Pumps with Special Attention to Volume Change Ratio and Size” ASME 1997 Design Automation Conference
- Hall A. S. “Kinematics and Linkage Design” Balt Publishers 1966
- Hall A. S. “Pin Gearing” ASME Proceedings, Mechanisms Conference 1968
- Beard J. E. “Kinematic Analysis of Gerotor Type Pumps, Engines, and Compressors” Ph.D. disseration, Purdue University 108 111 1985
- Andsdale R. “The Wankel R.C Engine” A.S. Bornes and Company Publishers New York 1969
- Beard J. E. “Rubbing Velocity of Epitrochoidal Gerotors” 20th Midwestern Mechanics Conference, Developments in Mechanics, 1987, Vol 14 1014 1018
- Colbounie J. R. “The Geometry of Trochoidal Envelopes and their Application in Rotary Pumps” “Mechanism and Machine Theory” 1974 9 421 435
- Dijksman E. A. “Motion Geometry of Mechanisms” Cambridge University Press Cambridge 1976 16
- Leemhius R. S. Soedel W. ”Vector Loop Analysis of Wankel Compressors and Engines” ASME, 78-DET-1978
- Sadler J.P. Nelle D.E. “Design Analysis of an Epicyclic Rotary Pump Mechansim” ASME Journal of Mechanical Design January 1979 101 99 107
- Schell C.P “Define the Geometry of the Inner And Outer Tooth Countors of a Gear Type Oil Pump” General Motors Engineering Journal July-August-September 1969 53 54
- Saegusa Y. Urashima K. Sugimoto M. Onoda M. Koiso T. “Development of Oil-Pump Rotors with a Trochoidal Tooth Shape” SAE Paper 840454
- Wankel F. “Rotary Piston Machines” London Iliffe Books, Ltd. 1963