Borgwarner Inc.

James W Bailey

Jonathan Bradley Stagg

A ring fan and shroud assembly having a fan, a shroud member, a recirculating flow member, and a plurality of curved guide vanes. The fan has a hub with a plurality of projecting fan blades and an outer ring member. The shroud member is positioned around the outer ring member. The recirculating flow member is on the shroud member and is positioned forward adjacent the outer ring member. The guide vanes are positioned within the recirculating flow member and define an inlet angle, which is nearly tangential with an outer entry diameter radial surface of the recirculating flow member, and an outlet angle that is nearly radial along an inner exit diameter of the recirculating flow member.

Ring fan and shroud assembly

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.

Ring fan and shroud air guide system

To make manifest the above noted desire, a revelation of the present invention is brought forth. A fan assembly () is provided including a hub () with a plurality of projecting fan blades (). A recirculating flow element () is provided which is generally forward adjacent an outer diameter of the fan blades (). A plurality of guide vanes () are positioned within the recirculating flow element (). The guide vanes () have an inlet angle () that is nearly tangential with an outer diameter surface () of the recirculating flow element (). The guide vanes () have an outlet angle () which is nearly radial along an inner diameter surface () of the recirculating flow element ().

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Marshall, MI, United States of America

James W Bailey