STRUCTURE OF BEARING OF TURBOSUPERCHARGER

摘要

PURPOSE:To provide floating radial bearings of such simple structure for a turbosupercharger that the axial movement of the floating bearings can be restricted without damaging them. CONSTITUTION:A bearing-supporting cylindrical hole 24 provided in a center housing 6 has a smooth cylindrical inside surface of constant diameter along the total length of the hole 24. A pair of hollow cylindrical floating radial bearings 25 of identical shape and a hollow cylindrical sleeve 40 are interposed between the bearing- supporting cylindrical hole 24 and a center shaft part 11a so that the sleeve 40 is located between the radial bearings 25. The outside diameter of each radial bearing 25 is almost equal to that of the sleeve 40 whose inside diameter is larger than that of the radial bearing 25. A runner 27 (at the side of an impeller 14) and a connecting step 41 (at the side of a turbine wheel 12) are provided. The runner 27 and the connecting step 41 function as stoppers to restrict the axial movement of the bearings 25 and the sleeve 40.