Flexible assembly and dynamic pressure radial gas bearing

Abstract

The invention belongs to the technical field of mechanical equipment, and in particular relates to a flexible assembly and a dynamic pressure radial gas bearing. The variable range of stiffness is limited due to the fact that in a traditional foil bearing structure, the wave foil arch bottom only contacts with the upper surface of a bearing seat in one direction; and at the same time, the effect of friction damping on energy dissipation is poor due to the fact that the space of a wave foil bearing structure is not fully utilized. The flexible assembly comprises a first foil group and a secondfoil group, the first foil group intersects with the second foil group, and the space phase of the first foil group is opposite to the space phase of the second foil group; and the flexible assembly is provided higher structural damping. According to the dynamic pressure radial gas bearing, by adopting the flexible assembly, the limited working space of the foil bearing is fully utilized, the contact area among the flexible assembly and the flat foil surface and the bearing seat surface is increased, bearing friction damping is improved, thus energy dissipation in the bearing is enhanced, andthe stability of a rotor-bearing system is effectively maintained.

Description

technical field [0001] The application belongs to the technical field of mechanical equipment, and in particular relates to a flexible component and a dynamic pressure radial gas bearing. Background technique [0002] Dynamic pressure gas bearings can be divided into rigid surface dynamic pressure gas bearings and flexible surface dynamic pressure gas bearings. At present, the most widely used dynamic pressure gas bearings are flexible surface dynamic pressure gas bearings, which can also be called elastic foil bearings or foil bearings. (Compliant Foil Bearing, CFB). Foil bearing is a self-acting flexible surface dynamic pressure gas bearing. Its flexible surface is generally made of metal foil and works by elastic hydrodynamic lubrication mechanism; the flexible surface enables the bearing to automatically establish different The thickness of the air film, so that the bearing can adapt to the angular deviation of the rotor within a certain range and produce a certain adap...

AI Technical Summary

Problems solved by technology

[0006] Based on the fact that in the traditional foil bearing structure, the corrugated foil arch bottom and the upper surface of the bearing seat only have one-way line contact, which limits the variable range of stiffness; at the same time, because the structural space of the corrugated foil bearing is not fully utilized, the frictional damping For the problem of poor energy dissipation effect, the application provides a flexible component and a dynamic pressure radial gas bearing

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