Invention Application
- Patent Title: MULTI-SWEEP BLADE WITH ABRUPT SWEEP TRANSITION
- Patent Title (中): 多次扫描刀片与冲击扫描过渡
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Application No.: PCT/US1990006743Application Date: 1990-11-16
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Publication No.: WO1991007593A1Publication Date: 1991-05-30
- Inventor: AIRFLOW RESEARCH AND MANUFACTURING CORPORATION , KIMBALL, Richard
- Applicant: AIRFLOW RESEARCH AND MANUFACTURING CORPORATION
- Assignee: AIRFLOW RESEARCH AND MANUFACTURING CORPORATION
- Current Assignee: AIRFLOW RESEARCH AND MANUFACTURING CORPORATION
- Priority: US438,774 19891116
- Main IPC: F04D29/38
- IPC: F04D29/38
Abstract:
A blade (14) for a fan or blower (10) 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.
Information query
