AEROSTATIC SPINDLE SUPPORT Russian patent published in 1999 - IPC

FIELD: mechanical engineering; metal-cutting machines. SUBSTANCE: proposed support may be used for reversible shafts and axles revolving at preset speeds and sense of rotation. Support has housing and fixed bush. Bores on inner surface of housing form two common collectors. Adjustable pneumatic resistors (piezoelectric choke) are smoothly arranged over circumference in radial direction. Nozzles of adjustable pneumatic resistors are received separate sector grooves made over circumference of swivel bush. In the center of each sector of swivel bush hole is drilled for receiving the nonadjusting feeder (jet). Provision is made for sensors for determination of the spindle axis position. Drive for turning the bush consists of gear train and electric motor with reduction gear. Automatic control system includes switch, analog-to-digital converter, programmable logic unit, demultiplexer, digital-to-analog converters and amplifier unit. EFFECT: maximum possible carrying capacity, maximum rigidity and high dynamic characteristics. 2 cl, 2 dwg