Turbocharger
AssigneeBorgWarner Inc.
InventorDirk Frankenstein
Life of this patent
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Abstract
Turbocharger comprising a rotor shaft (5), a turbine housing (2), a compressor housing (3) connected to the turbine housing (2), and including at least one air supply channel (13′) for supplying air to be compressed and at least one discharge channel (11) for delivering compressed air. One end of the rotor shaft projects into the compressor housing and supports a compressor rotor (21). A bearing (12) in the region of the compressor rotor supports the rotor shaft, and forms a bearing gap. The bearing includes two seals (29,30) axially spaced from one another to seal the bearing gap and to leave an intermediate space (31) between them. A suction channel (33,34) is connected to a vacuum source and sucks gas out of this intermediate space.
Claims9
A turbocharger comprising:
- a rotor shaft (5) defining an axis of rotation (R),
- a turbine housing (2) including at least one gas supply channel (9) for supplying exhaust gas, wherein a first end of said rotor shaft (5) projects into said turbine housing (2);
- at least one turbine rotor (4) axially mounted on said rotor shaft (5) to receive exhaust gas at the periphery of said rotor;
- a compressor housing (3) comprising at least one air supply channel (13′) for supplying air to be compressed, and wherein a second end of said rotor shaft (5) projects into said compressor housing (3);
- at least one compressor rotor (21) mounted on said rotor shaft (5) to deliver air to the periphery of said compressor rotor (21);
- and
- a seal arrangement (16) for the rotor shaft in the area of the compressor rotor (21) , comprising a bearing means (24,25,26) and sealing means (29, 30, 29′, 30′);
- wherein sealing means (29, 30, 29′, 30′) further comprises in addition to a first seal means (29, 30) a second seal means (29′, 30′) axially spaced therefrom, and wherein a vacuum bore (33, 34) is provided in communication with a space (31) between the two sealing means (29, 30, 29′, 30′) and a vacuum source (11, 39, 40),
- wherein said vacuum source is formed by the vacuum source suction side (11) of the compressor (21) itself.
Dependencies are inferred from the claim text.