Read full paper at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=53600#.VMnrHSzQrzE Author(s) Hao Liu 1* , Jae-Cheon Lee 1 , Alex Yoon 2 , Sang-Tae Kim 2 Affiliation(s) 1 Department of Mechanical and Automotive Engineering, Keimyung University, Daegu, South Korea . 2 Automotive Motor Biz. Division, LG Innotek, Incheon, South Korea . ABSTRACT Gerotor pump is a special kind of internal rotary pump, which contains a trochoid profile (commonly called as cycloid). Generation of trochoid is normally realized by external rolling method, namely a circle rotating on a fixed circle without slipping. This paper proposes derivative process of the trochoid profile by means of internal rolling method, which is that internal surface of a circle contacts with a fixed circle and rotates around it without slipping. Moreover the instantaneous flow rate can be obtained by numerically calculating the change ratio of area between the inner and o...
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