Turbomachine shaft sealing arrangement
AssigneeCummins Inc.
InventorsPrabhu Ramasamy, Andrew Day
Life of this patent
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Abstract
A turbomachine with a rotary shaft supporting a turbine wheel is supported for rotation in a housing. The shaft extends through a bore in the housing and a bearing assembly being disposed in the bore. At least one end of the shaft has a primary seal and a secondary seal. The primary seal comprises a non-contact seal defined by an annular clearance between a first non-rotating seal element and a second seal element that rotates with the shaft. The primary seal is arranged to receive lubricating oil from the bearing assembly. An oil slinging feature is provided between the primary and secondary seals.
Claims18
A turbomachine comprising:
- a shaft rotatable about a rotational axis;
- a turbine wheel provided at one end of the shaft for rotation about the rotational axis within a turbine housing;
- the shaft being supported for rotation in a bearing housing by a bearing assembly, the bearing housing having a bore through which the shaft extends, the bearing assembly being disposed in the bore;
- wherein at least one end of the shaft has a primary seal and a secondary seal, the primary seal comprising a non-contact seal defined by an annular clearance between a first non-rotating seal element and a second seal element that rotates with the shaft, the primary seal being arranged to receive lubricating oil from the bearing assembly, an oil slinging feature being provided between the primary and secondary seals.
Dependencies are inferred from the claim text.