Patent ID: 8629589

Claim:
A dynamoelectric machine, comprising: a rotor having a plurality of adjacent coils, wherein the plurality of adjacent coils partially define an annular region located about a spindle of the rotor and radially inboard of the plurality of adjacent coils; and a spaceblock disposed between adjacent coils so as to define at least a first cavity adjacent the spaceblock and between mutually adjacent coils, wherein the spaceblock includes: an inner radial surface and an outer radial surface, the inner radial surface proximate a center of rotation of the rotor relative to the outer radial surface; a fluid opening in the inner radial surface of the spaceblock, the fluid opening extending into a circumferential surface of the spaceblock, and a channel disposed in a coil facing surface of the spaceblock for intercepting a coolant flow from the annular region, via the fluid opening, and redirecting the coolant flow to the first cavity, and wherein the channel has a non-uniform width that tapers from the fluid opening to a second opening into the first cavity.