Water cooled rotor for dynamoelectric machines

Claim 2

A rotor for a dynamoelectric machine having a body portion and shaft portions, windings on the body portion having passages for circulation of a liquid coolant therethrough, a coolant distributing chamber on at least one of the shaft portions, means for connecting the chamber to said winding passages, said one shaft portion having a central axial bore adapted for coolant flow therethrough, a radial passage connecting the bore to said chamber, a liner of corrosion-resistant material in said bore, and bellows means interposed in said liner to permit thermal expansion of the liner, said bellows having a plurality of convolutions of generally rectangular cross-section with cylindrical outer surfaces and including an internal tube attached to the bellows at one end and extending over the convolutions, said tube having a plurality of holes therethrough.

Claim 3

A rotor for a dynamoelectric machine having a body portion and shaft portions, windings on the body portion having passages for circulation of a liquid coolant therethrough, a coolant distributing chamber on at least one of the shaft portions, means for connecting the chamber to said winding passages, said one shaft portion having a central axial bore adapted for coolant flow therethrough, a radial passage connecting the bore to said chamber, a liner of corrosion-resistant material in said bore, and bellows means interposed in said liner to perMit thermal expansion of the liner, a second radial passage spaced from the first-mentioned radial passage and connecting said bore to the surface of the rotor, and a corrosion-resistant liner in each radial passage, said last-mentioned liners being joined to said bore liner and said bellows being interposed in the bore liner between the radial passages.

Claim 4

A rotor for a dynamoelectric machine having a body portion and shaft portions, windings on the body portion having passages for circulation of a liquid coolant therethrough, a coolant distributing chamber on at least one of the shaft portions, means for connecting the chamber to said winding passages, said one shaft portion having a central axial bore adapted for coolant flow therethrough, a radial passage connecting the bore to said chamber, a liner of corrosion-resistant material in said bore, and bellows means interposed in said liner to perMit thermal expansion of the liner, a second radial passage spaced from the first-mentioned radial passage and connecting said bore to the surface of the rotor, and a corrosion-resistant liner in each radial passage, said last-mentioned liners being joined to said bore liner and said bellows being interposed in the bore liner between the radial passages.

Claim 5

In a rotor member having an axial bore and a corrosion-resistant liner in said bore, a bellows interposed in the liner to permit thermal expansion thereof, said bellows comprising a plurality of convolutions of generally rectangular cross-section having cylindrical outer surfaces for engagement with the surface of said bore, and the radial wall portions of said convolutions being adapted to flex to effect expansion and contraction of the bellows.

Claim 6

In a rotor member having an axial bore and a corrosion-resistant liner in said bore, a bellows interposed in the liner to permit thermal expansion thereof, said bellows comprising a plurality of convolutions of generally rectangular cross-section having cylindrical outer surfaces for engagement with the surface of said bore, and the radial wall portions of said convolutions being adapted to flex to effect expansion and contraction of the bellows.

Claim 7

The structure defined in claim 3 in which the bellows has an internal tube attached thereto at one end and extending over the convolutions, said tube having a plurality of holes therethrough.