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김대명(D. M. Kim),구지석(J. S. Gu),오성진(S. J. Oh),함영복(Y. B. Ham),김성동(S. D. Kim) 대한기계학회 2011 대한기계학회 춘추학술대회 Vol.2011 No.5
A gerotor type volumetric displacement pump is suitable for oil or water hydraulics. For this reason, many researchers have been studied. A gerotor pump has been widely used in various fields. In this study, we were optimized rotor profile, based on an envelope of a family of curves, is proposed. The inf1uence of the circular tooth radius and the length of eccentricity on the configuration of a gerotor pump has been explored in this paper. Throughout the experiment, performance was verified and we describe the design and volumetric displacement characteristics about small-sized gerotor pump.
김대명(D. M. Kim),함영복(Y. B. Ham),김성동(S. D. Kim) 유공압건설기계학회 2010 유공압건설기계학회 학술대회논문집 Vol.2010 No.6
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.
회전날개 길이를 이용한 제로터 펌프/모터의 배제용적에 관한 연구
김성동(S. D. Kim),김대명(D. M. Kim),함영복(Y. B. Ham),한철호(C. H. Han) 유공압건설기계학회 2011 드라이브·컨트롤 Vol.8 No.2
It is hard and complicated to analytically derive the volumetric-displacement formula of a gerotor pump/motor. Analytical formulas for calculating the volumetric-displacement are derived in this work, which is relatively easy and based upon vane lengths. The vane lengths mean the distances from axis of inner rotor or outer rotor to contact points between inner and outer rotors. Two kinds of formula were studied for two different kinematic motions of rotors. The first one is the case that outer rotor is fixed in space and inner rotor is in mixed motion of planetary revolution and rotation with respect to the spinning axis. And the second is the case that both inner and outer rotors simultaneously rotate. The proposed formula is verified through comparison with volumetric-displacement obtained from numerical CAD calculation.
회전날개 길이를 이용한 제로터 펌프/모터의 배제용적, 내·외부로터 회전 경우
김성동(S. D. Kim),김대명(D. M. Kim),함영복(Y. B. Ham) 유공압건설기계학회 2011 유공압건설기계학회 학술대회논문집 Vol.2011 No.6
It is hard and complicated to analytically derive the volumetric-displacement formula of a gerotor pump/motor. Analytical formulas for calculating the volumetric-displacement are derived in this work, which is relatively easy and based upon vane lengths. The vane lengths mean the distances from axis of inner rotor or outer rotor to contact points between inner and outer rotors. Two kinds of formula were studied for two different kinematic motions of rotors. The first one is the case that outer rotor is fixed in space and inner rotor is in mixed motion of planetary revolution and rotation with respect to the spinning axis. And the second is the case that both inner and outer rotors simultaneously rotate. The proposed formula is verified through comparison with volumetric-displacement obtained from numerical CAD calculation.