An exhaust-gas turbocharger (1) having a compressor (2) which has a compressor wheel (3) in a compressor housing (4); a turbine (5) which has a turbine wheel (6) in a turbine housing (7); and a bearing housing (8) which holds a stationary bearing bush (9) for a rotor shaft (10) and which has, at the
An exhaust-gas turbocharger (1) having a compressor (2) which has a compressor wheel (3) in a compressor housing (4); a turbine (5) which has a turbine wheel (6) in a turbine housing (7); and a bearing housing (8) which holds a stationary bearing bush (9) for a rotor shaft (10) and which has, at the compressor side, a bearing housing cover (11). The bearing bush (9) is provided with axial bearing surfaces (12, 13) and is fixed in the bearing housing (8) in a non-positively locking fashion.
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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
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); anda 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. 2. 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); anda 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 with an abutment collar (10) having first and second axial faces, wherein one abutment collar axial face is flush against the bearing housing, and the other is acted upon by a preload device (14) for generating an axial fixing spring force which spring force acts axially against 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, wherein said stationary unitary bearing bush (9) is fixed against rotation, andwherein the preload device (14) has a first end region and a second end region, and wherein the a first end region (15) bears against the bearing homing cover (11) and the second end region (16) bears against an abutment collar (17) of the bearing bush (9). 3. The exhaust-gas turbocharger as claimed in claim 1, wherein the preload device (14) is a plate spring. 4. The exhaust-gas turbocharger as claimed in claim 1, wherein the rotor shaft (10) has a shaft step (18) on the turbine side of the rotor shaft (10) as a counterpart surface for the axial bearing surface (13). 5. The exhaust-gas turbocharger as claimed in claim 4, wherein the axial bearing surface (12) closest to the compressor is supported against a sealing bush (19) fixed on the rotor shaft (10). 6. The exhaust-gas turbocharger as claimed in claim 5, wherein the bearing housing (8) has at least one housing shoulder (20, 21) for axially supporting the bearing bush (9). 7. The exhaust-gas turbocharger as claimed in claim 1, wherein the preload device (14) and the bearing housing cover (11) delimit an oil collecting chamber (22). 8. The exhaust-gas turbocharger as claimed in claim 7, wherein the oil collecting chamber (22) has at least one oil outflow opening (23).
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이 특허에 인용된 특허 (5)
Mnkel Uwe (Frankenthal DEX), Bearing for an exhaust-gas turbocharger.
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