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MULTI-SWEEP BLADE WITH ABRUPT SWEEP TRANSITION

申请公布号:US5064345(A)

申请号:US19890438774

申请日期:1989.11.16

申请公布日期:1991.11.12

申请人:
AIRFLOW RESEARCH AND MANUFACTURING CORPORATION

发明人:KIMBALL, RICHARD

分类号:F04D29/32;F04D29/38

主分类号:F04D29/32

摘要:A blade for a fan or blower which has an abrupt transition region between an inner blade region which has a negative leading edge sweep angle, and an outer blade region which is highly forwardly swept. The outer blade region is further characterized by a blade chord that increases with increasing radius. The fan provides a low pitch width and superior noise and efficiency trade-offs.

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