Cooling arrangement for a dynamoelectric machine

Claim 2

A cooling arrangement for cooling the rotor of a dynamoelectric machine including a laminated core carrying a winding having circumferentially disposed coil end turns extending axially from the opposite ends thereof, comprising: opposite end frame sections having shaft support openings; a shaft rotatably mounted within said shaft support openings and carrying said rotor, said shaft including an axial bore for conducting a flow of liquid coolant and first and second sets of radially disposed cooling passages communicating with said bore and the exterior of said shaft, said first and second sets of radial cooling passages being radially aligned with said coil end turns of said winding for directing a flow of liquid coolant towards said end turns; a pair of coil end turn support rings carrying the inner diameter of said end turns, said support rings including radial flange portions carried by said shaft and axially abutting the opposite ends of said laminated core, and said support rings further including an annular lip extending radially inwardly from an inner periphery thereof in an overhanging relationship with said flange portion so as to form an annular reservoir in a radially facing relationship with one of said first and second radial cooling passages; and clamping means including a nut threaded to said shaft to hold said support rings against said opposite ends of said laminated core whereby liquid coolant flow directed from said first and second radial cooling passages forms circulating annular pools of liquid coolant within said reservoirs when said shaft is rotating so as to conduct heat from said support rings that is conducted from said coil end turns and said opposite ends of said laminated core.

Claim 3

A cooling arrangement for a dynamoelectric machine including first and second rotor assemblies carrying windings electrically interconnected by a rectifier assembly including first and second groups of oppositely poled rectifier devices, said arraNgement comprising: a rotatable shaft carrying said first and second rotor assemblies; a rectifier support wheel including a rim and a pair of side portions extending radially inward from said rim to form an annular chamber therebetween, one of said side portions terminating in a hub member mounted on said shaft and the other of said side portions including an annular opening forming an entry to said annular chamber; first and second heat sink members mounted on said rim and within said annular chamber of said support wheel, each of said heat sink members including support areas aligned with the center axis of said support wheel and having one of said first and second groups of rectifier devices mounted thereon, whereby the rectifier devices in each of said groups are radially aligned with said center axis of said support wheel; and a nozzle means mounted adjacent said other side portion of said rectifier support wheel for directing a flow of liquid coolant through said annular opening And into said annular chamber whereby said heat sinks are immersed in an annular pool of liquid coolant which circulates in said annular chamber when said shaft is rotated.

Claim 4

A cooling arrangement for a dynamoelectric machine including first and second rotor assemblies carrying windings electrically interconnected by a rectifier assembly including first and second groups of oppositely poled rectifier devices, said arraNgement comprising: a rotatable shaft carrying said first and second rotor assemblies; a rectifier support wheel including a rim and a pair of side portions extending radially inward from said rim to form an annular chamber therebetween, one of said side portions terminating in a hub member mounted on said shaft and the other of said side portions including an annular opening forming an entry to said annular chamber; first and second heat sink members mounted on said rim and within said annular chamber of said support wheel, each of said heat sink members including support areas aligned with the center axis of said support wheel and having one of said first and second groups of rectifier devices mounted thereon, whereby the rectifier devices in each of said groups are radially aligned with said center axis of said support wheel; and a nozzle means mounted adjacent said other side portion of said rectifier support wheel for directing a flow of liquid coolant through said annular opening And into said annular chamber whereby said heat sinks are immersed in an annular pool of liquid coolant which circulates in said annular chamber when said shaft is rotated.

Claim 5

A cooling arrangement for a dynamoelectric machine including first and second rotor assemblies carrying windings and a rectifier assembly including first and second groups of oppositely poled semiconductor rectifier devices electrically connecting said windings of said first and second rotor assemblies, said arrangement comprising a housing including a liquid coolant inlet; a shaft mounted for rotation in said housing and carrying said first and second rotor assembles a rectifier support wheel including a rim and a pair of side portions extending radially inward from said rim to form an annular chamber therebetween, one of said side portions terminating in a hub member mounted on one end of said shaft and the other of said side portions including an annular opening forming an entry to said annular chamber; first and second heat sink members mounted in diametrically opposing relationship on said rim and within said annular chamber of said support wheel, each of said heat sink members including plural support areas having a common electrically conductive relationship and each being disposed at an angle relative to the other support areas so as to be aligned with the center axis of said support wheel, said support areas having one of said first and second groups of semiconductor rectifier devices mounted thereon so that the oppositely poled terminals of each of said rectifier devices is radially aligned with said center axis of said support wheel; and a spray nozzle means mounted adjacent said other side portion of said rectifier support wheel and communicating with said liquid coolant inlet for directing a flow of liquid coolant through said annular opening and into said annular chamber whereby said heat sinks are immersed in an annular pool of liquid coolant which circulates in said annular chamber when said shaft is rotated.

Claim 6

A cooling arrangement for a dynamoelectric machine including first and second rotor assemblies carrying windings and a rectifier assembly including first and second groups of oppositely poled semiconductor rectifier devices electrically connecting said windings of said first and second rotor assemblies, said arrangement comprising a housing including a liquid coolant inlet; a shaft mounted for rotation in said housing and carrying said first and second rotor assembles a rectifier support wheel including a rim and a pair of side portions extending radially inward from said rim to form an annular chamber therebetween, one of said side portions terminating in a hub member mounted on one end of said shaft and the other of said side portions including an annular opening forming an entry to said annular chamber; first and second heat sink members mounted in diametrically opposing relationship on said rim and within said annular chamber of said support wheel, each of said heat sink members including plural support areas having a common electrically conductive relationship and each being disposed at an angle relative to the other support areas so as to be aligned with the center axis of said support wheel, said support areas having one of said first and second groups of semiconductor rectifier devices mounted thereon so that the oppositely poled terminals of each of said rectifier devices is radially aligned with said center axis of said support wheel; and a spray nozzle means mounted adjacent said other side portion of said rectifier support wheel and communicating with said liquid coolant inlet for directing a flow of liquid coolant through said annular opening and into said annular chamber whereby said heat sinks are immersed in an annular pool of liquid coolant which circulates in said annular chamber when said shaft is rotated.