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US 2014/0212291 A1Published application
Ring fan and shroud air guide system
AssigneeBorgWarner Inc.
InventorsJonathan Bradley Stagg, James W. Bailey
Life of this patent
Estimating the term…
Abstract
A ring fan and shroud guide system which includes a rotating fan member with a conical outer ring and a cylindrical shroud member overlapping at least a portion of the outer ring. A plurality of guide vanes are provided in the shroud which minimize the tangential velocity component of the air flow entering the tip-gap region and provide improved air flow through the system. The guide vanes can have a curved configuration.
Claims18
A ring fan and shroud air guide system comprising:
- a fan member having a hub and a plurality of blades extending outwardly from the hub;
- a ring member attached to the blades, said ring member having a conical axially extending shape;
- a shroud member positioned around said fan member and ring member, said shroud member having a portion axially overlapping and radially inward of a first portion said ring member and forming a tip gap with a second portion of said ring member;
- and
- a plurality of guide vanes positioned in said shroud member, said guide vanes having a configuration to minimize the tangential component of the recirculation air flow through said tip gap.
2 more elements
A ring fan assembly comprising:
- a fan having a hub with a plurality of projecting fan blades and an outer ring member;
- a recirculating flow element generally forward adjacent said outer ring member;
- a plurality of guide vanes positioned within said recirculating flow element having an inlet angle nearly tangential with an outer entry diameter radial surface of said recirculating flow element and having an outlet angle nearly radial along an inner exit diameter surface of said recirculating flow element.
A ring fan assembly comprising:
- a fan having a hub with a plurality of projecting fan blades and an outer ring member;
- a recirculating flow member generally axially forward adjacent said ring member, said recirculating flow element having outer entry and inner exit diameters radially dimensionally juxtaposed by an outer diameter of said ring member;
- and
- a plurality of curvilinear guide vanes with linear extruded surfaces positioned within said recirculating element having an inlet angle generally 20° or less tangential with an outer diameter surface of said recirculating element and having an outlet angle generally 20° plus or minus radial along an inner diameter surface of said recirculating flow element.
1 more element
A ring fan assembly comprising:
- a fan having a hub with a plurality of projecting fan blades, and an outer ring member;
- a recirculating flow member generally axially forward adjacent said ring member, an inner diameter of said recirculating element being greater than an outer diameter of said ring member;
- and
- a plurality of curvilinear guide vanes positioned within said recirculating flow element having an inlet angle generally 20° or less with an outer entry diameter surface of said recirculating element and having an outlet angle generally plus or minus 20° radial along an inner diameter surface of said recirculating flow element.
1 more element
Dependencies are inferred from the claim text.