JOHN J BUTLER
Vehicle Board in Pittsburgh, PA

4219746, Aug 26, 1980

Sep 13, 1978

5/941994

John M. Butler - Penn Hills PA

Westinghouse Electric Corp. - Pittsburgh PA

H02K 132

310 61

Axial flow blowers for cooling the rotatable field winding on synchronous dynamoelectric machines. An axial flow blower is provided on each axial end of the dynamoelectric machine. Each blower includes an inboard and an outboard section. Each section is capable of forcing a gas coolant through interpolar spaces which separate the poles on synchronous motors and generators. A flow guide is arranged in each interpolar space to direct the gas coolant against the adjacent field winding. One inboard section causes axial flow of the gas coolant through the interpolar spaces when the shaft of the dynamoelectric machine is rotated in a first direction and the other inboard section causes axial flow of the gas coolant in the opposite direction when the shaft is rotated in the second direction. The inboard sections are so designed that when they are rotating in their non-blowing direction of rotation, they extract minimum total pressure from the axially-propelled gas coolant forced towards them by the other inboard section and both outboard sections. The outboard sections provide axial flow of gas coolant through the interpolar spaces during both rotational directions of the shaft.

4300066, Nov 10, 1981

Mar 19, 1979

6/021528

John M. Butler - Pittsburgh PA

Westinghouse Electric Corp. - Pittsburgh PA

H02K 900

310 53

A leakage measuring apparatus and method is herein provided for a gas-cooled, liquid-cooled dynamoelectric machine's cooling system. The apparatus comprises: a liquid coolant reservoir; an integrating vessel; a flow restriction means such as an orifice, orifice covered by a porous membrane, or a needle valve; a pressure relief valve which is hydraulically connected between the liquid coolant reservoir and the integrating vessel; and means for gaging the pressure within the integrating vessel, said pressure indicative of the amount of leakage within the cooling system. The effect obtained by the gaging of the pressure in the integrating vessel is: (1) the integration of the pressure surges resulting from the intermittent activation of the pressure relief valve; and (2) the amplification, for gaging purposes, of the pressure changes in the reservoir, these changes caused by the existence of leakage.