Double-layered fork-shaped radial gas hydrodynamic bearing based on 3D printing technology

Abstract

The invention discloses a double-layered fork-shaped radial gas hydrodynamic bearing based on a 3D printing technology. The double-layered fork-shaped radial gas hydrodynamic bearing is composed of two main elements including an integrated variable material bearing body (1) and a top-layer foil sheet (2), wherein the top-layer foil sheet (2) is of a thin-wall non-sealed annular structure, an outward stretching structure is formed at an opening of the top-layer foil sheet (2), and the top-layer foil sheet (2) is fixed with an inner fork-shaped structure of the integrated variable material bearing body (1) by welding or sticking. The integrated variable material bearing body (1) is integrally printed to be molded by applying the 3D printing technology, is a variable material distributed entity, and is mainly composed of four parts including an inner fork-shaped structure (3), an inner annular non-closed structure (4), an outer fork-shaped structure (5) and an outer annular closed structure (6) from inside to outside. A double-layered fork-shaped complicated structure of the bearing can meet relatively large rigidity and can obtain a relatively large bearing capability. The structure has deformation of a plurality of positions and has relatively large damping, and furthermore, relatively large coulomb damping exits between the inner layer fork shape structure and the top-layer foil sheet in a working process, so that the bearing has a relatively strong anti-impact capability. The double-layered fork-shaped radial gas hydrodynamic bearing has a plurality of hollow structures, so that materials are saved, the cost is reduced, the heat dissipation can also be increased, and the temperature rising of the bearing under high-speed running is reduced.

Description

technical field [0001] The invention relates to a gas bearing, in particular to a double-layer fork-shaped radial gas dynamic pressure bearing based on 3D printing technology. Background technique [0002] Gas bearing is a kind of gas suspension technology to suspend the high-speed rotating rotor without contact with the bearing, which greatly reduces the wear between the rotor and the bearing. This bearing does not require lubricating oil, so there is no need for a large lubrication system and repeated oil changes. In addition, there is no need to worry about the failure of the lubricating medium under high temperature conditions. Therefore, gas bearings have significant advantages such as high speed, high precision, high temperature resistance, low wear and long service life. At present, gas bearings have been widely used in aviation and aerospace fields. With the progress of civilian use, gas turbines, high-precision machine tools, turbochargers and other turbomachiner...

AI Technical Summary

Problems solved by technology

However, due to the limitations of traditional processing methods and processing techniques, many design ideas were once denied

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