An Analysis on Volumetric Displacement of Hydraulic Gerotor Motor

제로터 유압 모터의 용량에 관한 연구

  • 김대명 (금오공과대학교 대학원 기계공학부) ;
  • 함영복 (한국기계연구원) ;
  • 김성동 (금오공과대학교 기계공학부)
  • Received : 2010.06.07
  • Published : 2010.06.18


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.


Supported by : 금오공과대학교