CLOSED IMPELLER AND METHOD OF MANUFACTURING THE SAME
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United States of America
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Jan 27, 2022
app pub date -
Nov 26, 2019
filing date -
Nov 26, 2019
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Abstract
A closed impeller (1) includes an impeller main body (2), which is composed of an aluminum alloy and has blades (22) that protrude from a hub (21). A shroud (3) covers the blades. The blades and the shroud are joined together by brazed joints (4). The shroud (3) is formed from a brazing sheet (30) that comprises a core material (31), which is composed of an aluminum alloy, and a filler material layer (320), which is disposed on on an outermost surface (33) of the shroud that opposes or faces the blades when the shroud is brazed to the blades.
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