Machine tool bearing system

Details Machine tool bearing system Machine tool bearing system

1983-03-21

1984-12-25

Footland, Lenard A.

Bearings

Rotary bearing

Fluid bearing

F16C 3206

Patent

active

044900546

ABSTRACT:
A machine tool bearing system is disclosed for grinding machines and the like, wherein a housing has a spindle bore in which is carried a plurality of bearing sets of the rocking shoe segment type. A spindle is rotatably journalled in the bearing sets, and a lower pressure operating fluid is supplied to wet the spindle bearing surfaces. A hydrostatic pressure area is defined on the lowermost of the rocking shoe segments, and fluid at a higher operating pressure is supplied through a check valve system to the hydrostatic pressure area to provide a lifting force to the spindle during start-up conditions. When the spindle reaches its operating rpm., a hydrodynamic pressure is generated in the shoe segments, and serves to provide a stiff support system to the spindle and also serves to shut off the flow from the check valve system.

REFERENCES:
patent: 2936197 (1960-05-01), Weiler
patent: 3110527 (1963-11-01), Fox
patent: 3351394 (1967-11-01), Hooker
patent: 3675977 (1972-07-01), Arsenius et al.

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