| 摘要 |
PURPOSE:To maintain preferably oil lubrication of a rotary machine by supporting a guide frame at the axial center of a thin cylinder which is mounted between the bore ends of upper and lower circular wheels, thereby preventing the size in the gap of bearings from decreasing at the operating time. CONSTITUTION:Upper and lower ends of a thin cylinder 24 are respectively rigidly clamped with bolts 26 at the bore side ends between upper and lower circular wheels 14 and 15, and a guide frame 5 is mounted at the axial center of the cylinder 24. Since the radial thermal elongation of the frame 5 is absorbed by the radial deformation at the axial center of the cylinder 24 but the radial rigidity of the cylinder 24 is small due to reduced thickness, the frame 5 is not almost affected by the restriction but thermally elongated until it contacts with the bore of the cylinder 25. Accordingly, the size in the metal gap between a shaft collar 2 and a guide bearing 3 does not almost decrease even at the operating time, thereby maintaining preferable oil lubrication. |
