Browse > Article
http://dx.doi.org/10.9725/kstle.2006.22.2.079

Profile Design of the Inner Rotor of a Gerotor by the Composite Curve of Circular Arcs  

Lee Sung-Chul (Dept. of Mechanical Engineering, Inha Technical College)
Publication Information
Tribology and Lubricants / v.22, no.2, 2006 , pp. 79-86 More about this Journal
Abstract
As the gerotor set with ideal profile meshes too tight, the reduction in the size of the rotor is generally adopted for a smooth operation. In this paper, a method of the profile modification for providing clearances was proposed. The meshing properties of the gerotor were analyzed and the non-boundary section of the inner rotor was identified, which denoted that the adjacent chambers were in the same pressure state. Clearances were imposed on the non-boundary section of the inner rotor, and then the profile of that section was modified as a composite curve of arcs. The other sections of the inner rotor were also interpolated as arcs. Thus, the whole profile of the inner rotor was designed as a composite curve of arcs.
Keywords
gerotor; clearance; profile modification; biarc interrelation; trochoid; evolute;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Colbourne, J. R., 'Gear Shape and Theoretical Flow Rate in Internal Gear Pumps,' Trans. of the CSME, Vol. 3, No.4, pp. 215-223, 1975
2 Wenker, W. B., 'Constant Radial Clearance Gerotor,' United States Patent, No. 5030072, 1991
3 장주섭, 이종원, 한동철, 조명래, '지로터 펌프/모터의 치형 설계 프로그램 개발에 관한 연구,' 한국윤활학회지, 제12권, 제3회, pp. 100-106, 1996
4 Beard, J. E., Yannitell, D. W. and Pennock, G. R., 'The Effects of the Generating Pin Size and Placement on the Curvature and Displacement of Epitrochoidal Gerotors,' Mechanism and Machine Theory, Vol. 27, No.4, pp. 373-389, 1992   DOI   ScienceOn
5 이성철, 권오관, 'NC가공을 위한 인볼류트 곡선의 원호 근사화에 대한 연구,' 대한기계학회 논문집, 제19권, 제10호, pp. 2475-2483, 1995
6 Yu, C. Y. and Tsay, C. B., 'The Mathematical Model of Gerotor Pump Applicable to Its Characteristic Study,' J. CSME, Vol. 11, No.4, pp. 385-391, 1990
7 Saegusa, Y., Urashima, K., Sugimoto, M., Onoda, M. and Koiso, T., 'Development of Oil-Pump Rotors with a Trochoidal Tooth Shape,' SAE Paper, No. 840454, 1984
8 Colbourne, J. R., 'The Geometry of Trochoid Envelopes and Their Application in Rotary Pumps,' Mechanism and Machine Theory, Vol. 9, pp. 421-435, 1974   DOI   ScienceOn
9 Tsay, C. B. and Yu, C. Y., 'Mathematical Model for the Profile of Gerotor Pumps,' J. CSME, Vol. 10, No. 1, pp. 41-47, 1989
10 정태형, 하영욱, '제로터와 가공 호브의 3차원 형상자동 생성에 관한 연구,' 한국공작기계학회 논문집, 제10권, 제3호, pp. 43-49, 2001
11 최병규, 전차수, 유우식, 편영식, 정연찬, 'CAD/CAM 시스템과 CNC절삭가공.' 제10장, pp. 285, 사이텍미디어, 2001
12 이성철, 이성남, '유압모터에 사용되는 제로터의 설계 및 해석.' 한국윤활학회지, 제11권, 제2호, pp. 63-70, 1995
13 Faux, I. D. and Pratt, M. J., 'Computational Geometry for Design and Manufacture,' Chap. 1, pp. 28, John Wiley & Sons, New York, 1981
14 Rutter, J. W., 'Geometry of Curves,' Chap. 11, pp. 183, Chapman & Hall/CRC, 2000