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Optimal Design of Tooth Profile for High-Efficiency Gerotor Oil Pump  

Kim Jae Hun (부산대학교 정밀정형 및 금형가공연구소)
Park Joon Hong (부산대학교 기계기술연구소)
Jung Sung Yuen (부산대학교 기계기술연구소)
Son Jin Hyuk (부산대학교 창의공학시스템학과)
Kim Chul (부산대학교 기계기술연구소)
Publication Information
Journal of the Korean Society for Precision Engineering / v.22, no.5, 2005 , pp. 28-36 More about this Journal
Abstract
A gerotor pump is suitable for oil hydraulics of machine tools, automotive engines, compressors, constructions and other various applications, which are highly accepted by designers. Especially the pump is an essential machine element of an automotive engine to feed lubricant oil. However, related industries do not have necessary technology to design and optimize the pump and paid royalties of rotor profile on an advanced country. Also, gerotor pumps with unsettled design parameters have not been sufficiently analyzed from a theoretical view of design. Therefore, it is still very difficult for the pump designer and manufacturer to decide the specifications for the required gerotor pump by users. In this study, the design optimization has been carried out to determine the design parameters that maximize the specific flow rate and minimize the flow rate irregularity. Theoretical analyses and optimal design of the gerotor oil pump have been performed by mathematical base, numerical method and knowledge of kinematics. An automated design system of the tooth profile has been developed through Auto LISP language and CAD method considering various design parameters. Finally, an optimally designed model for a general type of a gerotor pump has been generated and experimentally verified for the pump performances.
Keywords
Oil pump; Rotor; Trochoid; Optimization; Autoamtic design system;
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