Power plants – Pressure fluid source and motor – Coaxial impeller and turbine unit
Patent
1991-09-10
1992-10-06
Look, Edward K.
Power plants
Pressure fluid source and motor
Coaxial impeller and turbine unit
60361, F16D 3300
Patent
active
051521393
ABSTRACT:
A method for forming a torque converter flow path defined by an impeller, a turbine and a stator comprising initiating a meanline design path having an outer radius R1 and an inner radius R2 connected by a tangent line, wherein the outer radius is initially set equal to maximum meanline design offset so as to extend to a meanline design path point at a radius R3 equalling .sqroot.(R8).sup.2 -A/2.pi., and the inner radius is set equal to the outer radius so as to extend to a meanline design path point at R4 equaling .sqroot.(R7).sup.2 +A/2.pi., wherein (R8) and (R7) are the maximum and minimum radial distances, respectively, from the flow path to the torque axis. The method further comprises generating an outer dimensional representation of the flow path, reducing the outer radius R1 and inner radius R2 equally until a maximum offset of the outer contour of the flow path matches the maximum allowable offset, increasing the outer radius with respect to the inner radius to reach a second outer contour point corresponding to the maximum axial offset, and reducing the outer radius to provide a smooth taper inwardly from the maximum axial offset. Preferably, the area through the flow path is constant in accordance with conventional design practice, and the outer and inner contour points are determined along a plurality of element lines by a computer program. The method results in a torque converter design in which the meanline design path has an outer radius greater than the inner radius.
REFERENCES:
patent: 3220187 (1965-11-01), Perkins
patent: 3503209 (1970-03-01), Loffelholz
patent: 4186557 (1980-02-01), Arai et al.
patent: 4841729 (1989-06-01), Mori
Ford Motor Company
Look Edward K.
Mattingly Todd
May Roger L.
McKenzie Frank G.
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