GB162552A - Improvements relating to dynamo electric machines - Google Patents

Abstract

162,552. Siemens Bros. Dynamo Works, Ltd., and Jantzen, P. H. H. May 20, 1920. Addition to 146,624. Armatures and field magnets, cooling.-In a machine in which the stator and rotor are separated by a non- magnetic highresistance partition and in which the stator winding ends are immersed in cooling-oil flowing through axial passages in the stator core while the rotor is cooled independently by a flow of insulating-fluid through axial passages, as described in the parent Specification, the axial flow of oil is replaced or supplemented by a flow in directions transverse to the axis. In the form shown, the oil enters spaces 9, 9<1> through plates 10, 10<1> and passes through perforated plates 11 over the coil ends to openings in plates 12 which register with the axial core ducts 13. These ducts communicate with transverse passages 14 between the laminations, and oil also reaches these passages from a narrow cavity 15 between the core and the non-magnetic separator 1. Tubes 17 may bridge some of the transverse passages. The oil leaves the casing at 16. In an alternative form, oil entering through a central bottom opening in the stator casing flows to the right and left and ascends to an outlet at the top partly through the coil-end chambers and partly through passages in the stator core transverse to the axis, axial passages in the core not being employed.