GAS BEARING

摘要

PROBLEM TO BE SOLVED: To provide a hydrostatic gas bearing having a high damping characteristic. SOLUTION: A gas bearing section includes: a first bearing part formed between a thrust plane and a radial plane between a fixed bearing cylinder and a floating bush by passing compressed air supplied through an air supply port from an orifice to a gap portion between the fixed bearing cylinder and the floating bush; and a second bearing part formed between a thrust plane and a radial plane between the floating bush and a rotary shaft by passing the compressed air supplied through the air supply port from the orifice to a gap portion between the floating bush and the rotary shaft through a joint part and via a pipe line of the floating bush. A fluid damper mechanism regulates a damping coefficient and spring stiffness of the first bearing part by varying the viscosity of magnetic fluid or the gap and controls a setting time to disturbance of the rotary shaft. COPYRIGHT: (C)2011,JPO&INPIT