Idler disk

Details Idler disk Idler disk

F - Mech Eng,Light,Heat,Weapons

04

D

74/258

F04D 29/04 (2006.01) F01D 5/00 (2006.01) F01D 5/04 (2006.01) F04D 29/22 (2006.01) F04D 29/68 (2006.01)

Patent

CA 1273509

ABSTRACT An idler disk for reducing fluid drag forces in a machine having a rotating component is disclosed. An outer housing is provided for the machine and a cavity is defined in the outer housing. The cavity has opposed side walls. A rotatable component is positioned in the cavity and the rotatable component is spaced apart from the side walls of the cavity. At least one freely rotatable idler disk is positioned in the cavity and the idler disk is in spaced apart relationship with the rotatable component find the side walls of the cavity. Theidler disk extends in the cavity along at least a portion of the length of the rotatable component. The idler disk is caused to rotate in the same direction as the rotatable component by the rotating fluid in the cavity. The fluid is causedto rotate by the rotation of the rotatable component. The rotating idler disk increases the speed of the fluid rotating adjacent the rotatable component and thereby reduces the fluid drag on the rotatable component. An outer seal means forms a seal between the idler disk and the rotatable component to control the flow of fluid between the idler disk and the rotatable component. The outer sealmeans is positioned adjacent the outer periphery of the rotatable component and the idler disk. The outer seal means acts to equalize the axial forces on the sides of the idler disk to maintain the idler disk in a desired equilibrium position where the idler disk is maintained in spaced apart relationship from the rotatable component and the side walls of the cavity.

551651

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