A horizontal online adjustable gap gas foil bearing

Abstract

The invention relates to the technical field of foil-piece bearings and particularly relates to a horizontal online interval-adjustable gas foil-piece bearing. The horizontal online interval-adjustable gas foil-piece bearing comprises a bearing outer seat shell, wherein bearing side baffles are arranged on the upper and lower sides of the bearing outer seat shell, first through holes are correspond formed in four ends of the bearing outer seat shell and of the bearing side baffles, a second through hole is formed in every two adjacent first through holes, and fixed bolts are arranged in the second through holes in the same vertical direction; and a limiting groove is formed in the middle of the bearing outer seat shell, and an adjustable bearing inner seat is arranged in the limiting groove. The horizontal online interval-adjustable gas foil-piece bearing is of a flexible structure, the radius of a tangent circle of a foil-piece can be accurately controlled by adjusting marking bolts with dials within a certain range and can be adjusted online according to the real-time load of the rotor in an operation process, and then the bearing can work at an optimal state, so that the working life of the bearing is prolonged, and the working of the stator is relatively stable.

Description

Technical field [0001] The invention relates to the technical field of foil bearings, in particular to a horizontal online gap adjustable gas foil bearing. Background technique [0002] At present, dynamic pressure gas elastic foil bearing products have been widely used, but there are very few manufacturers that can produce foil bearings, which shows that the processing technology is quite complicated. As a form of early foil bearings, foil bearings have simple structure, easy processing, and meet the power requirements of small, high-speed, light-loaded rotating machinery, but the gap is not adjustable for gas foil bearings and self-adjusting dynamic pressure gas elastic foils In the bearing, the foil cutting circle radius is fixed. Once the foil bearing is manufactured, the gas foil bearing cannot adjust the foil cutting circle radius during operation, so that the bearing gap cannot be adjusted in a large range. In the process of designing and processing foil bearings, it is d...

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Problems solved by technology

[0002] At present, dynamic pressure gas elastic foil bearing products have been widely used, but there are very few manufacturers that can produce foil bearings, which shows that the processing technology is quite complicated

As a form of early foil bearings, foil bearings have a simple structure, are easy to process, and meet the power requirements of small high-speed and light-loaded rotating machines, but the gap cannot be adjusted in gas foil bearings and self-adjusting dynamic pressure gas elastic foils. In the bearing, the foil tangential radius is fixed. Once the foil bearing is manufactured, the gas foil bearing cannot adjust the foil tangential radius during operation, so that the clearance of the bearing cannot be adjusted in a wide range.

However, in the design and processing process of foil bearings, it is difficult to achieve the predetermined design effect with the cutting circle radius of foils, which makes the design and operation status of foil bearings quite different.

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