International Harvester Company

Harold D Beck

C Paul Kolthoff, Jr

Heat exchange apparatus including a toroidal-type radiator having radially extending cooling air passageways formed through the core thereof, a rotary fan positioned radially inwardly of the radiator core, fan shroud means shaped and positioned with respect to the radiator core and the blades of the fan whereby the air stream induced by the fan during operation has a major component in a radial direction, and air recirculation barrier means for substantially eliminating the recirculation of air at the hub region of the fan.

Heat exchange apparatus including a toroidal-type radiator

Heat exchange apparatus including a toroidal-type radiator having radially extending cooling air passage-ways formed through the core thereof, a rotary fan positioned radially inwardly of the radiator core, fan shroud means shaped and positioned with respect to the radiator core and the blades of the fan whereby the air stream induced by the fan during operation has a major component in a radial direction, and an auxiliary radiator structure axially spaced from the rotary fan.

A heat exchanger apparatus for a liquid-cooled internal combustion engine including a radiator axially spaced from the engine, an engine-driven, suction-type fan axially spaced intermediate the engine and the radiator for drawing cooling air axially through the radiator, fan shroud means shaped and positioned with respect to the radiator and blades of the fan whereby the air stream discharged by the fan is in a radial outward direction, and an air baffle positioned intermediate the fan and engine for mitigating air recirculation in the fan hub region; the fan shroud structure is formed to provide a generally cylindrical exit throat section (CF), a radial flat discharge section (RF), and a radial expander or diverging section (R), serving as a transition between the throat section and the discharge section, and wherein the impeller blades of the fan have a projected or effective axial width (AW); the various shroud structure sections are dimensioned with respect to such projected or effective axial width (AW) of the fan blades and the fan blades are positioned with respect to the shroud structure sections in the following manner: CF=AW/3, RF=AW/3, R=2AW/3, and the radial plane defining one axial limit of the projected or effective axial width (AW) of the fan blades substantially contains the radial discharge section (RF).

Recirculation barrier for a heat transfer system

Heat exchange apparatus including a toroidal-type radiator having radially extending cooling air passage-ways formed through the core thereof, a rotary fan positioned radially inwardly of the radiator core, and fan shroud means shaped and positioned with respect to the radiator core and the blades of the fan whereby the air stream induced by the fan during operation has a major component in a radial direction.

A contoured shroud exit having means capable of producing low pressure vortices when a fan generated air stream is expelled therefrom.

Fan shroud structure

A heat exchanger apparatus for a liquid-cooled internal combustion engine including a radiator axially spaced from the engine, an engine driven, suction type fan axially spaced intermediate the engine and radiator for drawing cooling air axially through the radiator, and fan shroud means shaped and positioned with respect to the radiator and the blades of the fan whereby the major component of the air stream discharged by the fan is in a direction reversed to the direction to the major component of the air stream entering the radiator. The fan shroud structure is formed to provide a generally cylindrical exit throat section (CF), a radial flat discharge section (RF), and a radial expander or diverging section (R) serving as a transition between the throat section and the radial exit section and wherein the propeller-type blades of the fan have a projected axial width (AW). The various shroud structure sections are dimensioned with respect to such projected axial width (AW) of the fan blades and the fan blades are positioned with respect to such shroud structure sections in the following manner: CF = AW/3, RF = AW/3, R = 2AW/3, and the radial plane containing the trailing edges of the fan blades is axially spaced outwardly from the radial plane containing the radial exit section (RF) a distance X.sub.E and wherein the magnitude of X.sub.E is between 60 and 75 percent of the projected axial width (AW) of the fan blades.

Growing community of inventors

Downers Grove, IL, United States of America

Harold D Beck