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Flexible assembly and dynamic-pressure thrust gas bearing

A flexible component, gas bearing technology, applied in bearings, shafts and bearings, mechanical equipment, etc., can solve the problems of limited rigidity variable range, poor friction damping energy dissipation effect, and underutilized structural space of corrugated foil bearings. , to achieve the effect of enhancing energy dissipation, maintaining stability, and high structural damping

Inactive Publication Date: 2019-05-10
XI AN JIAOTONG UNIV
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Problems solved by technology

[0006] Based on the fact that in the traditional foil bearing structure, the wave 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 structure space of the wave 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 thrust gas bearing

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  • Flexible assembly and dynamic-pressure thrust gas bearing

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Embodiment Construction

[0029] Hereinafter, specific embodiments of the present application will be described in detail with reference to the accompanying drawings. According to these detailed descriptions, those skilled in the art can clearly understand the present application and can implement the present application. Without departing from the principle of the present application, the features in different embodiments can be combined to obtain new implementations, or some features in certain embodiments can be replaced to obtain other preferred implementations.

[0030] With the development of technologies in the fields of aerospace, energy and power, in order to maintain the cleanliness, stability and reliability of high-speed machinery, higher and higher requirements are placed on lubrication technology. When turbomachinery works at extreme temperatures, such as low-temperature helium liquefaction devices, ultra-high temperature turbojet systems, etc., and the oil medium can no longer achieve lub...

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Abstract

The invention belongs to the technical field of mechanical equipment, and particularly relates to a flexible assembly and a dynamic-pressure thrust gas bearing. In a conventional foil sheet bearing structure, a wave foil arch base is only in single-direction linear contact with the upper surface of a bearing base, so that the variable range of rigidity is limited; and the space of a wave foil bearing structure is not sufficiently utilized, so that friction damping is relatively poor in energy dissipation effect. The invention provides a flexible assembly which comprises a foil sheet group anda second foil sheet group, wherein the first foil sheet group is mutually crossed with the second foil sheet group; and the space phase of the first foil sheet group is reverse to that of the second foil sheet group. The flexible assembly has higher structure damping. According to the dynamic-pressure thrust gas bearing disclosed by the invention, the flexible assembly is adopted, and limited working space of the foil sheet bearing is sufficiently utilized, so that the contact area among the flexible assembly, a top-layer flat foil and a bearing base surface is increased, and bearing frictiondamping is improved, and therefore, energy dissipation in the bearing is strengthened, and stability of a rotor-bearing system is effectively kept.

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 thrust 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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16C32/06
Inventor 赖天伟王昱侯予陈双涛陈良薛绒张泽
Owner XI AN JIAOTONG UNIV
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