RESEARCH ARTICLE

Elliptical lobe shape gerotor pump design to minimize wear

  • Mohammad Reza KARAMOOZ RAVARI
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  • Department of Mechanical Engineering, Isfahan University Of Technology, Isfahan 84156-83111, Iran

Received date: 11 Jan 2011

Accepted date: 20 Aug 2011

Published date: 05 Dec 2011

Copyright

2014 Higher Education Press and Springer-Verlag Berlin Heidelberg

Abstract

The gerotor pumps are the most important parts of mechanical equipment that have a vast number of applications in industries and automobiles. Because the gerotor pumps cannot be adjusted for wear so it is important to reduce the wear as much as possible. In this paper first mathematical equations for elliptical lobe shape rotors profile and curvature of them have been derived and then Specific flow and wear rate proportional factor (WRPF) have been formulated. To reach the minimum wear in rotors teeth, the ellipse shape factor is changed for each value of number of outer rotor teeth in a feasible range and wear rate proportional factor has been resulted. Also in order to have better comparison specific flow has been presented. The obtained results have been compared with circular pumps with similar geometrical parameters and show the significant improvement in wear of the rotors with negligible changes in the specific flow.

Cite this article

Mohammad Reza KARAMOOZ RAVARI . Elliptical lobe shape gerotor pump design to minimize wear[J]. Frontiers of Mechanical Engineering, 2011 , 6(4) : 429 -434 . DOI: 10.1007/s11465-011-0247-6

1
Vecchiato D, Demenego A, Argyris J, Litvin F L. Geometry of a cycloidal pump. Computer Methods in Applied Mechanics and Engineering, 2001, 190(18-19): 2309-2330

DOI

2
Chen B K, Fang T T, Li C Y, Wang S Y. Gear geometry of cycloid drives. Science in China, Series E: Technology Sciences, 2008, 51(5): 598-610

DOI

3
Hwang Y W, Hsieh C F. Geometry design and analysis for Trochoidal type speed reducers with conjugate envelopes. Transactions of the Canadian Society for Mechanical Engineering, 2006, 30: 261-278

4
Hwang Y W, Hsieh C F. Determination of surface singularities of a cycloidal gear drive with inner meshing. Mathematical and Computer Modeling, 2007, 45(3-4): 340-354

DOI

5
Ivanović L, Josifović D. Specific sliding of trochoidal gearing profile in the gerotor pumps. FME Transactions, 2006, 34(3): 121-127

6
Chang Y J, Kim J H, Jeon C H, Kim C, Jung S Y. Development of an integrated system for the automated design of a gerotor oil pump. Journal of Mechanical Design, 2007, 129(10): 1099-1105

DOI

7
Kwon S M, Kim M S, Shin J H. Analytical wear model of a gerotor pump without hydrodynamic effect. Journal of Advanced Mechanical Design, Systems, and Manufacturing, 2008, 2: 230-237

8
Gamez-Montero P J, Castilla R, Mujal R, Khamashta M, Codina E. GEROLAB package system: innovative tool to design a trochoidal-gear pump. Journal of Mechanical Design, 2009, 131(7): 074502

DOI

9
Demenego A, Vecchiato D, Litvin F L, Nervegna N, Manco S. Design and simulation of meshing of a cycloidal pump. Mechanism and Machine Theory, 2002, 37(3): 311-332

DOI

10
Gamez-Montero P J, Castilla R, Khamashta M, Codina E. Contact problems of a trochoidal-gear pump. International Journal of Mechanical Sciences, 2006, 48(12): 1471-1480

DOI

11
Kim J H, Kim C, Chang Y J. Optimum design on lobe shapes of gerotor oil pump. Journal of Mechanical Science Technology, 2006, 20(9): 1390-1398

DOI

12
Inaguma Y. Calculation of theoretical torque and displacement in an internal gear pump. Koyo Engineering Journal, 2006, 1001E: 70-76

13
Maiti R, Sinha G L. Kinematics of active contact in modified epitrochoid generated rotary piston machines. Mechanism and Machine Theory, 1988, 23(1): 39-45

DOI

14
Shung J B, Pennock G R. The direct contact problem in a trochoidal-type machine. Mechanism and Machine Theory, 1994, 29(5): 673-689

DOI

15
Beard J E, Yannitell D W, Pennock G R. The effects of the generating pin size and placement on the curvature and displacement of epitrochoidal gerotors. Mechanism and Machine Theory, 1992, 27(4): 373-389

DOI

16
Mimmi G C, Pennacchi P E. Involute gear pumps versus lobe pumps: A comparison. Journal of Mechanical Design, 1997, 119(4): 458-465

DOI

17
Mimmi G C, Pennacchi P E. Rotor design and optimization in internal lobe pumps. Applied Mechanics Reviews, 1997, 50(11): 133-141

DOI

18
Jung S Y, Han S M, Cho H Y, Kim C. Automated design system for a rotor with an ellipse lobe profile. Journal of Mechanical Science Technology, 2009, 23(11): 2928-2937

DOI

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