A Study of the Characteristics of Journal Bearings and the Rotor Dynamics of Turbo Machinery

저어널 베어링 의 특성 과 터어보 기계류 의 축진동 에 관한 연구

The effects of oil supply conditions on the static and dynamic properties of journal bearings supporting high speed rotors were investigated. The initially unknown hydrostatic pressure in oil pockets were determined by iteration with the aid of the equation of oil flow balance for given oil supply pressure and flow coefficients of oil inlet. For the calculation of dynamic characteristics, the dynamic changes of pressure in lubricating gaps and oil pockets were linearised with a perturbation method.