Patent ID: 9140268
Filing Date: 2015-09-22
Classification: F04D,F16C

Abstract:
1. A bearing apparatus comprising: a bearing portion arranged substantially in a shape of a cylinder with a bottom; a shaft inserted in the bearing portion, and arranged to rotate about a central axis relative to the bearing portion; an upper thrust portion arranged to extend radially outward from an upper end portion of the shaft; a rotor cylindrical portion arranged to extend downward from an outer edge portion of the upper thrust portion, and arranged radially outward of the bearing portion; and an annular seal cover fixed to an outer circumferential surface of the rotor cylindrical portion; wherein an inner circumferential surface of the rotor cylindrical portion and an outer circumferential surface of the bearing portion are arranged to together define a seal gap therebetween, the seal gap including a seal portion having a surface of a lubricating oil defined therein; an inner circumferential surface of the bearing portion and an outer circumferential surface of the shaft are arranged to together define a radial gap therebetween, the radial gap including a radial bearing portion arranged to support the shaft in a radial direction; an upper surface of the bearing portion and a lower surface of the upper thrust portion are arranged to together define a thrust gap therebetween, the thrust gap including a thrust bearing portion arranged to support the upper thrust portion in an axial direction; and the seal cover includes: