A static pressure heavy-load direct-drive high-accuracy rotating table comprises a rotating platform composed of a base (1), a pressing board (2), a main guide rail static pressure oil cavity (3), a static pressure core shaft oil cavity (4), a work table top (5), a static pressure oil return
system (6), a
torque motor stator (7), a
stator fixing support (8), a reading head (9), a
steel belt type optical
grating installation support (10), a rotor installation support (11), a
torque motor rotor (12), an oil collection pot (13), a
water cooling system (14), a gear
distributor (15), a multi-head pump (16), a main guide rail oil cavity (17), a pressing board oil cavity (18), a core shaft pump
station system (19), a guide rail pump
station system (20), an
oil supply system and an oil return system. The static pressure heavy-load direct-drive high-accuracy rotating table is directly driven by the large-
torque motor rotor, achieves zero transmission, and is compact in structure and reliable in work; a very low
frictional coefficient characteristic of a hydrostatic guide rail is combined, and the rotating table is high in
servo rigidity, high in dynamic response speed and small in static difference.