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US 8,157,543 B2Granted
High-speed rotating shaft of supercharger
AssigneeIHI Corporation
InventorMasahiro Shimizu
Life of this patent
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Abstract
In a high-speed rotating shaft (10) of a supercharger which is rotatably supported by two radial bearings (12a, 12b) spaced at a fixed distance (L), directly couples a turbine impeller fixed to one end and a compressor impeller fixed to the other end, and transmits a rotational driving force of the turbine impeller to the compressor impeller, a small shaft portion (14) having a smaller diameter than a bearing portion is provided between bearings. The small shaft portion (14) is offset to a compressor side.
Claims2
A high-speed rotating shaft arrangement for a supercharger, comprising:
- a shaft;
- a tubine impeller fixed to a first end of the shaft, and a compressor impeller fixed to a second end of the shaft,
- a first radial bearing disposed proximate the first end of the shaft and a second radial bearing spaced at a fixed distance from the first radial bearing, and disposed proximate a second end of the shaft,
- wherein the shaft further comprises:
- a) a reduced diameter portion and
- b) a bearing engaging portion, the reduced diameter portion having a diameter smaller than the bearing engaging portion and a mid point closer to the second radial bearing than the first radial bearing so that a reduced diameter portion is offset with respect to a mid point of the fixed distance by which first and second radial bearings are spaced.
3 more elements
Dependencies are inferred from the claim text.