Cooling device for rotary electrical machine has cooling ribs of rotor shaft enclosed by fluid-filled chamber with heat exchanger at one side having heat exchange surfaces projecting into cooling fluid chamber

摘要

The cooling device has a fluid-filled chamber (19), enclosing cooling ribs (20), projecting radially from a heat conductive section (17) of the electrical machine rotor shaft (5). One wall of the fluid-filled chamber is provided by one of the machine bearing end plates (8), a second wall provided by a heat exchanger (26) with planar heat exchange surfaces (27) projecting into a second fluid-filled chamber (24) through which a cooling fluid is circulated.