HEAT-INSULATING BEARING STRUCTURE

摘要

A heat-insulating bearing structure employs three disks so that peripheral edges of the disks come into contact with a circumferential side face of a rotary shaft, to support the rotary shaft. A contact part between the rotary shaft and each disk is small, and therefore, heat conduction from the rotary shaft to each disk is small. Accordingly, the bearing structure surely supports the rotary shaft even if the rotary shaft is heated to a high temperature. Each disk is provided with fins so that, when rotated, the fins draw in surrounding air and blow out the air from the peripheral edge of the disk toward the contact part between the disk and the rotary shaft, thereby cooling the contact part and surely supporting the rotary shaft.

主权项

1. A heat-insulating bearing structure for supporting a rotary shaft provided with, at one end thereof, an impeller that comes into contact with high-temperature gas, the heat-insulating bearing structure comprising:
a set of three disks whose peripheral edges are in contact with a circumferential side face of the rotary shaft from three directions, the three disks being rotatably supported with respective disk-supporting shafts that are in parallel with the rotary shaft, each of the disks having fins to radially blow out atmospheric gas from a peripheral edge of the disk when the disks are rotated.