Rotary machine
AssigneeIHI Corporation
InventorsTakuya OZASA, Ryosuke YUMOTO
Life of this patent
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Abstract
Provided is a rotary machine including a rotating resinous impeller, a rotary shaft penetrating the impeller, and a fastening portion screwed to the rotary shaft, in which the rotary shaft includes a penetrating shaft portion facing an inner peripheral surface of the impeller, a tip shaft portion screwed to the fastening portion, and a fastening reception portion sandwiching the impeller between the fastening reception portion and the fastening portion, the penetrating shaft portion has a non-circular portion and an outline of a cross section of the non-circular portion orthogonal to a rotational axis deviates from a perfect circle about the rotational axis, and the impeller includes a connecting portion engaging with the non-circular portion.
Claims6
-10. (canceled)
A rotary machine comprising:
- a rotating resinous impeller;
- a rotary shaft penetrating the impeller;
- and
- a fastening portion screwed to the rotary shaft, wherein
- the rotary shaft includes a penetrating shaft portion facing an inner peripheral surface of the impeller, a tip shaft portion screwed to the fastening portion, and a fastening reception portion sandwiching the impeller between the fastening reception portion and the fastening portion,
- the penetrating shaft portion has a non-circular portion and an outline of a cross section of the non-circular portion orthogonal to a rotational axis deviates from a perfect circle about the rotational axis,
- the impeller includes a connecting portion engaging with the non-circular portion,
- the penetrating shaft portion has a cylindrical main circular portion disposed closer to the fastening reception portion side than the non-circular portion with an outer periphery facing the inner peripheral surface of the impeller, and
- the connecting portion is separated from the main circular portion.
Dependencies are inferred from the claim text.