Search | Korea Science

Kim, D.M.;Ham, Y.B.;Kim, S.D.
- 유공압시스템학회:학술대회논문집
- /
- 2010.06a
- /
- pp.39-43
- /
- 2010
It is hard and complex to analytically derive a volumetric displacement formula of a gerotor hydraulic motor because geometric shape of its rotors is complicate. An analytical method about the volumetric displacement is proposed in this work, which is relatively easy and based upon two physical concepts. The first one is energy conservation between hydraulic input energy of the motor and mechanical output energy. The second concept is torque equilibrium with respect to inner and outer rotors. The proposed formula about the volumetric displacement is verified by comparing an analytical displacement and a numerical displacement for an example specification of the motor. The numerical displacement is calculated through a kind of CAD technology. The analytical formula can be utilized in analysis and design of hydraulic gerotor motors.
PDF

Lee Sung-Chul
- Tribology and Lubricants
- /
- v.22 no.2
- /
- pp.79-86
- /
- 2006
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.
https://doi.org/10.9725/kstle.2006.22.2.079 인용 PDF KSCI

Kim, Dae-Myoung;Kim, Sung-Dong;Gu, Ji-Suk;Oh, Sung-Jin;Ham, Young-Bog
- Transactions of the Korean Society of Mechanical Engineers A
- /
- v.35 no.11
- /
- pp.1383-1389
- /
- 2011
Gerotor-type volumetric displacement pumps are suitable for oil or water hydraulics. For this reason, many researchers have studied this topic. Gerotor pumps have been widely used in various fields. In this study, we designed a rotor profile based on an envelope of a family of curves. An analytic method for determining the volumetric displacement of the gerotor pump is verified by comparing a result obtained using CAD technology and an experimental result. Throughout the experiment, the flow rate performance was verified. In addition, we describe the design and volumetric displacement characteristics of the gerotor pump.
https://doi.org/10.3795/KSME-A.2011.35.11.1383 인용 PDF KSCI