A Study on Theoretical Flowrate of Gerotor Pump Using Chamber Areas
- 4 Downloads
Gerotor oil pump supplies rotating elements with lubricating oil to prevent wear and to reduce frictional heat. Theoretical flowrate is needed to calculate volume efficiency of gerotor pump and irregularity, which mainly influences on pump noise. Therefore, accurate calculation of theoretical flowrate is crucial to predict performance of the gerotor pump. In this study, a new approach was proposed to calculate theoretical flowrate of the gerotor pump using chamber areas surrounded by coordinates of inner and outer rotors between contact points. Also, an automatic program applying the new methood was developed, based on numerical analysis program, Matlab, and theoretical flowrates of the gerotors with the various lobe shapes (circle, ellipse1-involute-ellipse2, 3-ellipse and 2- ellipse) for the six-speed auto transmission were calculated. To verify accuracy of the new method, theoretical flowrates calculated by chamber areas were compared to those obtained both from the vane length method and from the performance experiment.
KeywordsGerotor Flow rate Automatic program Volumetric displacement Chamber area Performance test
Unable to display preview. Download preview PDF.
- 6.Inaguma, Y., “Calculation of Theoretical Torque and Displacement in an Internal Gear Pump,” Koyo Engineering Journal, Vol. 1001E, pp. 70–76, 2006.Google Scholar
- 7.Lee, S.-C., “Profile Design of the Inner Rotor of a Gerotor by the Composite Curve of Circular Arcs,” Journal of the Korean Society of Tribologists and Lubrication Engineers, Vol. 22, No. (2), pp. 79–86, 2006.Google Scholar
- 9.Kim, S. D., Kim, D. M., and Ham, Y. B., “An Analysis on Volumetric Displacement of Gerotor Hydraulic Motor Using Energy Conservation and Torque Equilibrium–Second Report: the Case of a Revolving and Rotating Inner Rotor,” Journal of Drive and Control, Vol. 11, No. (4), pp. 15–24, 2014.CrossRefGoogle Scholar
- 10.Bae, J. H., Kwak, H. S., San, S., and Kim, C., “Design and CFD Analysis of Gerotor with Multiple Profiles (Ellipse–Involute–Ellipse Type and 3–Ellipses Type) Using Rotation and Translation Algorithm,” Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, Vol. 230, No. (5), pp. 804–823, 2016.Google Scholar