| 摘要 |
A machine tool spindle having a rotor supported on an externally pressurized liquid film oil bearing is provided with air seals. The air seals comprise annular grooves adjacent the outboards on the spindle which are fed air under pressure. An intermediate groove is provided to limit the aeration of oil to a small portion of oil which overflows from the oil bearing exhaust groove thereby improving pump efficiency and bearing stiffness.
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