Vertical induction motor

Claim 2

In a dynamoelectric machine, the combination comprising an elongated shaft, dual guide bearings circumferentially disposed about said shaft at axially spaced locations to permit rotation of said shaft therein, a rotor and a double acting thrust bearing mounted upon said shaft between said guide bearings, a unitary flywheel fixedly secured to said shaft between said rotor and said double acting thrust bearing to supplement the inertia of said rotor, an anti-reverse device fixedly secured to said shaft at an axial location adjacent the end of said double acting thrust bearing remote from said flywheel, partition means separating said flywheel from said rotor, means for circulating coolant through said rotor to pass said coolant in said first radial direction across the face of said partition means proximate said rotor, first means within said partition means for diverting a portion of said coolant through said partition means to pass across the face of said partition means proximate said flywheel in a direction radially opposite the direction of coolant flow across the face of the partition means proximate said rotor and second means within said partition means for returning said diverted coolant to the circulating coolant passing across the face of the partition means proximate the rotor, said second means being disposed within said partition means at a radially removed location relative to said first means.

Claim 3

In a dynamoelectric machine, the combination comprising an elongated shaft, dual guide bearings circumferentially disposed about said shaft at axially spaced locations to permit rotation of said shaft therein, a rotor and a double acting thrust bearing mounted upon said shaft between said guide bearings, a unitary flywheel fixedly secured to said shaft between said rotor and said double acting thrust bearing to supplement the inertia of said rotor, an anti-reverse device fixedly secured to said shaft at an axial location adjacent the end of said double acting thrust bearing remote from said flywheel, partition means separating said flywheel from said rotor, means for circulating coolant through said rotor to pass said coolant in said first radial direction across the face of said partition means proximate said rotor, first means within said partition means for diverting a portion of said coolant through said partition means to pass across the face of said partition means proximate said flywheel in a direction radially opposite the direction of coolant flow across the face of the partition means proximate said rotor and second means within said partition means for returning said diverted coolant to the circulating coolant passing across the face of the partition means proximate the rotor, said second means being disposed within said partition means at a radially removed location relative to said first means.

Claim 4

In a dynamoelectric machine, the combination comprising an elongated shaft, dual guide bearings circumferentially disposed about said shaft at axially spaced locations to permit rotation of said shaft therein, a rotor and a double acting thrust bearing mounted upon said shaft between said guide bearings, a unitary flywheel fixedly secured to said shaft between said rotor and said double acting thrust bearing to supplement the inertia of said rotor, an anti-reverse device fixedly secured to said shaft at an axial location adjacent the end of said double acting thrust bearing remote from said flywheel, partition means separating said flywheel from said rotor, means for circulating coolant through said rotor to pass said coolant in said first radial direction across the face of said partition means proximate said rotor, first means within said partition means for diverting a portion of said coolant through said partition means to pass across the face of said partition means proximate said flywheel in a direction radially opposite the direction of coolant flow across the face of the partition means proximate said rotor and second means within said partition means for returning said diverted coolant to the circulating coolant passing across the face of the partition means proximate the rotor, said second means being disposed within said partition means at a radially removed location relative to said first means.

Claim 5

A dynamoelectric machine according to claim 1 further including a reservoir of liquid lubricant covering the bearing faces of said thrust bearing, a sleeve concentrically mounted between said shaft and said thrust bearing, said sleeve extending to an elevation above the height of said lubricant reservoir and means disposed between said double acting thrust bearing and said flywheel for removing lubricant entering the region between said sleeve and said shaft.

Claim 6

A dynamoelectric machine according to claim 2 wherein said lubricant removal means includes a shoulder extending radially from said shaft at an axial location between said flywheel and said reservoir and an annular seal circumferentially disposed about said shaft below said shoulder, said seal having an annular lip protruding upwardly towards said shoulder along the face of said seal proximate said shaft.

Claim 7

A vertical induction motor comprising an elongated shaft, guide bearings circumferentially mounted about opposite ends of said shaft, a double acting thrust bearing and a rotor axially mounted upon said shaft between said guide bearings, a flywheel mounted upon said shaft between said rotor and said thrust bearings, first partition means disposed intermediate said flywheel and said thrust bearings, coupling means fixedly secured to said shaft at the extreme opposite drive end of said shaft, an anti-reverse device affixed to said coupling means, a housing enclosing said thrust bearing, a sleeve concentrically mounted between said shaft and said thrust bearing, a reservoir of liquid lubricant disposed between said housing and said sleeve, said lubricant reservoir extending to an elevation covering both the bearing surfaces of said thrust bearing and said adjacent guide bearing, means situated upon said shaft between said flywheel and said reservoir for removing lubricant entering the region between said sleeve and said shaft, means for circulating coolant through said rotor, second partition means disposed between said flywheel and said rotor for substantially restricting contact between said coolant and said flywheel and means for diverting a portion of said coolant circulating through said rotor through said second partition means to pass said coolant across the face of the flywheel proximate said rotor in a radially outward direction.

Claim 8

A vertical induction motor comprising an elongated shaft, guide bearings circumferentially mounted about opposite ends of said shaft, a double acting thrust bearing and a rotor axially mounted upon said shaft between said guide bearings, a flywheel mounted upon said shaft between said rotor and said thrust bearings, first partition means disposed intermediate said flywheel and said thrust bearings, coupling means fixedly secured to said shaft at the extreme opposite drive end of said shaft, an anti-reverse device affixed to said coupling means, a housing enclosing said thrust bearing, a sleeve concentrically mounted between said shaft and said thrust bearing, a reservoir of liquid lubricant disposed between said housing and said sleeve, said lubricant reservoir extending to an elevation covering both the bearing surfaces of said thrust bearing and said adjacent guide bearing, means situated upon said shaft between said flywheel and said reservoir for removing lubricant entering the region between said sleeve and said shaft, means for circulating coolant through said rotor, second partition means disposed between said flywheel and said rotor for substantially restricting contact between said coolant and said flywheel and means for diverting a portion of said coolant circulating through said rotor through said second partition means to pass said coolant across the face of the flywheel proximate said rotor in a radially outward direction.

Claim 9

A vertical induction motor according to claim 4 further including cooling means disposed outside said lubricant reservoir, means for transmitting frictionally heated lubricant from said thrust bearing to said cooling means, means for returning lubricant from said cooling means to said reservoir, a second housing enclosing the guide bearing disposed proximate the drive end of said motor, second lubricant reservoir within said second housing extending to an elevation above said guide bearing and cooling coil means within said second lubricant reservoir for removing heat from said lubricant.