DYNAMIC PRESSURE GAS BEARING

摘要

PROBLEM TO BE SOLVED: To prevent the temperature increase of a pad and assure the bearing performance of a dynamic pressure gas bearing. SOLUTION: This is a dynamic pressure gas bearing in which three or more pads 13 are installed in a circumference direction so as to surround a rotary shaft 4 through a pivot 12 in a bearing housing 11, the rotary shaft 4 is supported by forming a gas film 5 between the rotating rotary shaft 4 and the pad 13 and a minute pressure difference is installed between the end surfaces of a bearing in an axial direction and gas for cooling is circulated. Plural recessed grooves are formed in the longitudinal direction of the back surface of the pad 13.