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US 4,060,744 AGranted
Rotary electrical machine or vertical construction
AssigneeBBC Brown, Boveri & Company, Limited
InventorMihailo Starcevic
Life of this patent
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AssigneeBBC Brown, Boveri & Company, Limited
InventorMihailo Starcevic
Estimating the term…
A support structure for the stator component of an electrical machine having a larger diameter, the rotor of which rotates about a vertical axis. The stator and foundation on which the stator rests form concentric inner and outer rings respectively joined by means of spoke-like arms spaced uniformly around the circumference, and the arrangement of these arms is such that they are tangent to the surface of an imagined coaxial cylinder the diameter of which is smaller than that of the inner ring, and the axes of two neighboring arms when imagined as extended in a straight line over both rings intersect only within the inner ring. The respective axes of the arms form identical acute angles with radial lines extending respectively from the common center of the inner and outer rings through corresponding joints which interconnect the outer ends of the arms with the outer ring and all of the arms are inclined in the same sense so as to accommodate torsional stresses imposed upon the inner ring caused by thermally induced expansion of that ring. The arms are inflexible over their whole effective length in the longitudinal direction corresponding to the applied load.
An electrical machine of vertical construction, the stator and surrounding foundation of which form concentric radially spaced inner and outer rings respectively, a system of circumferentially extending and uniformly distributed spoke-like arms located intermediate said inner and outer rings, and means joining the opposite ends of said arms to said inner and outer rings, the respective axes of said arms forming identical acute angles with radial lines extending respectively from the common center of said inner and outer rings through corresponding joints which interconnect the outer ends of said arms with said outer ring, and said arms being inflexible over their whole effective length in the longitudinal direction corresponding to the applied load, all of said arms being inclined in the same sense so as to accommodate torsional stresses imposed upon said inner ring caused by thermally induced expansion thereof.
Dependencies are inferred from the claim text.