发明授权
US07347252B2 Centrifugal impeller 有权
离心式叶轮

Centrifugal impeller
摘要:
An improved centrifugal impeller having between 20 and 26 rearwardly curved blades blades, a ratio of blade annulus width to wheel radius between 0.31 and 0.37, and an inlet blade angle in the range 32° to 36° and a discharge blade angle in the range 36° to 40°.
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