초록

Compact fan and shroud package for radiators with fan blades curved rearwardly to position rotating shroud at optimized distance from radiator for improved air flow through radiator.

대표청구항 ▼

Vehicle engine cooling fan and shrouding assembly for forcing cooling air through a radiator in which engine coolant is circulated comprising support means adjacent to the radiator, a fan shroud and mounting shell operatively secured to said support means adjacent to said radiator, said shell having

Vehicle engine cooling fan and shrouding assembly for forcing cooling air through a radiator in which engine coolant is circulated comprising support means adjacent to the radiator, a fan shroud and mounting shell operatively secured to said support means adjacent to said radiator, said shell having a peripheral forwardly extending wall portion to provide an intake for air flowing through said radiator, said shell further having a generally cylindrical and rearwardly extending portion to provide a reduced dimensioned air ejector for said shell, spoke means extending inwardly from said air ejector, a fan drive motor supported by said spoke means extending axially into said shell, said motor having a rotatable output shaft extending outwardly therefrom toward said radiator and having a terminal end portion, an engine cooling fan operatively driven by said drive motor and rotatably mounted in said shell, said fan having an annular hub with a cylindrical wall and a forward face disposed in a first plane rearward of and generally parallel to said radiator, a plurality of arcuately spaced blades extending generally radially outward from cylindrical wall of said hub, each of said blades having a convex front edge that sharply sweeps rearward from a respective point of attachment to said cylindrical wall of said hub closely adjacent to the forward face of said hub and said first plane thereof to a terminal end point in a second plane rearwardly of said first plane that extends through at least one half of the width of said cylindrical wall starting from the forward face of said hub, and an annular shroud securely fixed to the terminal end points of said blades for rotation therewith in said air ejector, said annular shroud being located radially inward of said wall portion and in a plane generally parallel to the radiator, said forward face of said hub having a centralized mount collar, fastener means securing said central mount collar to said end portion of said output shaft of said drive motor, said annular shroud being axially positioned by said blades for rotation in a plane substantially rearward of and axially spaced from said mount collar and at a predetermined spacing from said radiator whereby high volumes of air flowing through said radiator peripheral to said annular shroud and into the fixed shell turns generally radially inward and from all sides into the rotating shroud for intermixture with high volume air flowing into the fan from an area immediately in front of said rotating shroud for rearward discharge by said fan.