Double-layer fork-shaped radial gas dynamic pressure bearing based on 3D printing technology

Abstract

The invention discloses a double-layer fork-shaped radial gas dynamic pressure bearing based on 3D printing technology, which is composed of two main components: an integrated variable material bearing body (1) and a top-layer foil (2). The top foil (2) is a thin-walled non-closed ring structure with an overhanging structure at the opening, and is fixed to the inner fork structure of the integrated variable material bearing body (1) by welding or pasting. The one-piece variable material bearing body (1) is integrally printed and formed by using 3D printing technology, and is an entity with variable material distribution. It mainly consists of four parts, from the inside to the outside, respectively, an inner fork-shaped structure (3), an inner ring-shaped non-closed structure (4), an outer fork-shaped structure (5), and an outer ring-shaped closed structure (6). The double-layered fork-shaped complex structure of the new type bearing can not only satisfy greater rigidity, but also obtain greater load-carrying capacity. And because there are many deformations in the structure, the structural damping is relatively large. In addition, there is a large Coulomb damping between the inner fork and the top foil when they work, so that the bearing has a strong impact resistance. Moreover, there are a large number of hollow structures in the present invention, which not only saves materials and reduces costs, but also increases heat dissipation and reduces the temperature rise of the bearing under high-speed operation.

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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