Machining spindle apparatus having a hydrostatic bearing for mac

Details Machining spindle apparatus having a hydrostatic bearing for mac Machining spindle apparatus having a hydrostatic bearing for mac

1996-11-22

1998-11-10

Eley, Timothy V.

Abrading

Machine

Rotary tool

451342, 451363, B24B 500, B24B 4104

Patent

active

058335226

ABSTRACT:
A machining spindle apparatus has a hydrostatic bearing for machine tools. The machining spindle apparatus includes a built-in motor built into the middle of a housing, as well as front and rear hydrostatic bearings respectively mounted on the front side and the rear side of the housing. A machining spindle is driven by the built-in motor and rotatably supported by the front and rear hydrostatic bearings. The front hydrostatic bearing comprises a radial bearing pocket and a thrust bearing pocket. In addition, a pair of pneumatic seals lie over the radial and thrust bearing pockets. The rear hydrostatic bearing includes a radial bearing pocket and a constant-pressurized oil chamber. The constant-pressurized oil chamber operates as a piston cylinder. Accordingly, a predetermined pressure acts forward, i.e. opposite the thrust bearing pocket of the front hydrostatic bearing. And another pair of pneumatic seals lies over both of the radial bearing pocket and the constant-pressurized oil chamber.

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patent: 5496207 (1996-03-01), Hornung et al.

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