Invention Grant
- Patent Title: Stall margin enhancement of axial fan with rotating shroud
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Application No.: US13849980Application Date: 2013-03-25
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Publication No.: US09885368B2Publication Date: 2018-02-06
- Inventor: Ryan K. Dygert , Peter R. Bushnell
- Applicant: Carrier Corporation
- Applicant Address: US CT Farmington
- Assignee: CARRIER CORPORATION
- Current Assignee: CARRIER CORPORATION
- Current Assignee Address: US CT Farmington
- Agency: Cantor Colburn LLP
- Main IPC: F04D27/02
- IPC: F04D27/02 ; F04D29/52 ; F04D29/16 ; F04D29/68 ; F04D29/32

Abstract:
A fan assembly includes a shrouded fan rotor having fan blades extending from a hub and rotatable about a central axis. A fan shroud extends circumferentially around the fan rotor and secured to the fan blades. The shroud includes a first axially extending annular portion secured to the fan blades, a second axially extending annular portion radially outwardly spaced from the first axially extending annular portion, and a third portion connecting the first and second axially extending annular portions. A casing is located circumferentially around the fan shroud defining a radial clearance between the casing and the fan shroud, and includes casing wedges extending from a radially inboard surface of the casing toward the shroud and defining a radial wedge gap between a first wedge surface and the shroud and an axial wedge gap between a second wedge surface and an upstream end of the fan shroud.
Public/Granted literature
- US20130315737A1 Stall Margin Enhancement of Axial Fan With Rotating Shroud Public/Granted day:2013-11-28
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