F - Mech Eng,Light,Heat,Weapons – 16 – C
Patent
F - Mech Eng,Light,Heat,Weapons
16
C
103/119, 308/5.5
F16C 37/00 (2006.01) F04D 29/06 (2006.01) F16C 33/10 (2006.01) H02K 5/167 (2006.01)
Patent
CA 1183721
14 A B S T R A C T TRANSFORMER OIL CIRCULATING PUMP The invention relates to a motor pump including means for improving the lubrication and cooling of the bearings supporting the pump shaft. At each bearing, helical grooves are formed in the cylindrical bearing surface and/or in the surface of the shaft portion journalled therein, and a flow-inducing member disposed on the shaft for rotation therewith is located adjacent one end of the bearing, the arrangement being such that rotation of the shaft causes lubricating liquid coolant from a space within the pump housing to flow into and through the helical grooves, and causes the flow-inducing member to produce suction aiding the flow of liquid through the helical grooves. Preferably, the flow-inducing member is a thrust collar having radial grooves formed in its thrust surface cooperating with a thrust surface of the bearing, and each of which radial grooves communicates at its inner end with a helical groove formed in the shaft. The invention is particularly useful in connec- tion with bearings made of materials which are poor heat conductors.
394645
Oldham And Company
Westinghouse Electric Corporation
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