Liquid cooled commutation-type dynamo electric machine

Claim 1

Commutator-type dynamo electric machine having a housing, including a tubular housing shell (1) and end shields (6, 6a) closing off the housing shell; a stator (2, 3) located within the housing shell; a shaft (4) journalled in the end shield; a rotor (8, 9) secured to the shaft; a commutator (5) secured to a portion of the shaft adjacent one of the end shields; a cooling fluid (17) inlet opening (15) and an outlet opening (16) formed in the housing to establish a cooling fluid circuit into the interior of the housing in the region of the stator and rotor thereof; and comprising, in accordance with the invention means (12) for separating cooling fluid within the housing from the space (57) therein in which the commutator (5) is located from the space (28) in which the stator (2) and the rotor (8) are located, including a sealing disc (18) of insulating material mounted on the commutator and rotating therewith in a plane transverse to the axis of the shaft, and sealingly surrounding the commutator, and extending radially towards the housing, a stationary sealing ring (20, 21) interengaging with the sealing disc, projecting radially inwardly from the housing and at least in part overlapping the sealing disc (18) to separate the space (57), within which the commutation is positioned from the remainder of the space (28) within the housing, the inlet and outlet openings (15, 16) being located in a region of said remainder of the space (28) and terminating therein, to establish fluid circuit throughout said remainder of the space of the housing only; and a slinger disc (20) secured to the outer circumference of the insulating disc.