The invention relates to the technical field of air bearings, and discloses an
air bearing device capable of preventing axial movement, the
air bearing device comprises an air supply
system, a bearing base body and a rotating roller, a permanent
magnet pre-tightening structure and an electromagnetic
fine tuning structure are embedded on the inner wall of the bearing base body, and the outer surfaces of the permanent
magnet pre-tightening structure and the electromagnetic
fine tuning structure are coplanar with the inner wall of the bearing base body; the permanent
magnet pre-tightening structure at least comprises two sets of permanent magnets arranged at intervals, the electromagnetic
fine tuning structure at least comprises two sets of electromagnetic modules, the electromagnetic modules are located on the outer sides of the corresponding permanent magnets and tightly attached to the corresponding permanent magnets, and the magnetic direction of the electromagnetic modules is opposite to that of the permanent magnets. The thrust disc adopts a gas-magnetic division design, prevents axial movement by utilizing magnetic force, adopts a design of taking permanent magnet as a main part and taking
electromagnetism as an auxiliary part, is highly integrated, does not need to occupy additional axial space, is more compact in structure, adapts to small and high-speed main shaft scenes, and is controllable in
electromagnetic heating defect compared with a traditional thrust disc structure.