Dynamic pressure gas radial ceramic bearing

Abstract

The invention discloses a dynamic pressure gas radial ceramic bearing, which comprises a ceramic bearing outer sleeve and a ceramic bearing inner sleeve, wherein the ceramic bearing inner sleeve is positioned in the ceramic bearing outer sleeve, the external circle of the ceramic bearing outer sleeve is provided with uniformly distributed grooves and uniformly distributed concave holes, the external circle and two ends of the ceramic bearing inner sleeve are provided with groove-type patterns with regular shape, and the internal circle of the ceramic bearing inner sleeve is provided with uniformly distributed grooves. Because a carbide ceramic-based composite material is used as the manufacturing material of the bearing, the bearing has the characteristics of simple structure, conveniencefor installation, economical efficiency, low cost, strong practicability, easiness in industrialized implementation and the like; because the groove-type patterns with regular shape are machined at the external circle and two ends of the ceramic bearing inner sleeve, the dynamic pressure gas continuously generated under the drive of a high-speed rotating shaft can be well kept in a fit clearance of the internal circle of the ceramic bearing outer sleeve and the external circle of the ceramic bearing inner sleeve, and an air film required for supporting the bearing function of the high-speed rotating shaft is formed to realize certain stability and loading capacity.

Description

technical field [0001] The invention relates to a high-rigidity dynamic pressure gas radial ceramic bearing capable of supporting a high-speed rotary shaft. Background technique [0002] Bearings can be divided into rolling bearings (using balls or rollers), oil-free bearings (using lubricating materials for friction), sliding bearings (using oil), gas bearings, and magnetic bearings (using magnetic force for non-contact action). Sliding bearings are further divided into hydrodynamic bearings and hydrostatic bearings, in which hydrodynamic bearings support the shaft by generating oil pressure through relative sliding motion; hydrostatic bearings support the shaft through high-pressure oil provided outside the bearing of. Gas bearings operate on the same principle as plain bearings except that gas is used instead of oil. The static pressure gas bearing is provided with pressurized gas from the outside; while the dynamic pressure gas bearing is relatively sliding to generate...

AI Technical Summary

Problems solved by technology

It can not only solve the existing tilting pad type radial dynamic pressure gas bearing in the bearing pad structure and installation process, but also solve a series of problems that are difficult to achieve industrialization such as high cost and low benefit caused by too complicated problems, and also solve In terms of material preparation technology and processing technology of dynamic pressure gas elastic foil bearings, a series of problems that are difficult to realize in industrialization, such as high cost and performance that cannot meet the design requirements, are caused by too many technical difficulties

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