| 主权项 |
1. An exhaust-gas turbocharger (1) having
a compressor (2) including a compressor wheel (3) in a compressor housing (4); a turbine (5) including a turbine wheel (6) in a turbine housing (7); a rotor shaft (10), wherein said compressor wheel (3) is mounted at one end of the shaft (10) and said turbine wheel (6) is mounted at the other end of the shaft (10); and a bearing housing (8), wherein the compressor housing (4) is mounted to one side of the bearing housing (8) and the turbine housing (7) is mounted to the opposite side of the bearing housing (8), which bearing housing (8) supports a stationary unitary bearing bush (9) for both the radial mounting and also the axial mounting of the rotor shaft (10) and which bearing housing (8) has, at the side to which the compressor housing (4) is mounted, a bearing housing cover (11), wherein the stationary unitary, bearing bush (9) is provided with at least one radial bearing surface for radial support of said rotor shaft (10), with first and second axial bearing surfaces (12, 13) at first and second axial ends of the stationary unitary bearing bush (9), and wherein a preload device (14) is provided for generating an axial fixing spring force for the stationary unitary bearing bush (9) greater than the maximum axial force occurring in the direction of the compressor during operation of the exhaust-gas turbocharger, and wherein said stationary unitary bearing bush (9) is fixed against rotation. |
