An Elastic Foil Gas Bearing with Adjustable Preload
A gas bearing and elastic foil technology, which is applied in the direction of bearings, bearings, shafts and bearings in rotating motion, can solve the problems of inability to adapt to various working conditions, inability to withstand large loads, and low stiffness of bearing foils. , to achieve the effect of simple structure, avoiding installation and fixing requirements, and improving bearing capacity
Inactive Publication Date: 2015-08-05
XI AN JIAOTONG UNIV
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Problems solved by technology
Existing elastic foil bearings cannot withstand large loads due to the low stiffness of the bearing wave foil
Increasing the bearing preload is one of the more popular methods at present, but it is usually difficult to adjust the preload during use, which cannot meet the requirements of adapting to various working conditions in practice
Method used
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Embodiment Construction
[0023] The present invention will be described in further detail below in conjunction with the accompanying drawings.
[0024] see figure 1 , figure 2 and image 3 , an elastic foil gas bearing with adjustable preload, including more than two bearing seats 1, the bearing seats 1 are fan-shaped cylindrical tile structures distributed in the circumferential direction, the inner diameter of which is 20-80mm, and the bosses of the bearing seats 1 The first through hole 6 on 9 overlaps the threaded hole 7 on the groove of the next bearing seat 1 in turn, and is screwed and connected by the bolt 5, and the shaft 2 is installed on the first inner cylindrical surface 11 of the bearing seat 1 to form a whole in turn In the inner cylindrical surface of the inner cylindrical surface, the journal 13 of the shaft 2 and the first inner cylindrical surface 11 of the bearing housing 1 form an integral inner cylindrical surface in turn, and an elastic foil gas bearing 3 is arranged between ...
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The invention discloses a pre-tightening adjustable elastic foil gas bearing. Bearing pedestals are circumferentially distributed, in fan-shaped cylindrical tile structures and are connected through bolts in a screwing manner; a shaft is arranged in an integrated inner cylindrical face formed by sequentially connecting the bearing pedestals; elastic foil gas bearings are arranged between the neck of the shaft and the integrated inner cylindrical face formed by the bearing pedestals; after the rotating speed is increased, the shaft neck is separated from the surface of the third inner cylindrical face of the elastic foil gas bearings; after a gas lubricating film is formed, the elastic foil gas bearings supply certain supporting rigidity and damp to the shaft; furthermore, arch foils of the elastic foil gas bearings are deformed to slide in the first internal cylindrical faces of the bearing pedestals; the tightening force of springs pulls the elastic foil gas bearings, so that the third inner cylindrical face of the elastic foil gas bearings can be straightened and get close to the neck of the shaft; therefore, the pre-tightening force of the elastic foil gas bearings is adjusted and can adapt to the load of the shaft. The pre-tightening adjustable elastic foil gas bearing has the characteristics of simple structure and adaptation.
Description
technical field [0001] The invention belongs to the technical field of elastic foil bearings, in particular to an elastic foil gas bearing with adjustable preload. Background technique [0002] Elastic foil bearings have good self-adaptability and can operate under high temperature, high speed and high pollution conditions for a long time without auxiliary devices such as oil supply or control systems, so the structure is simple. Existing elastic foil bearings cannot withstand large loads due to the low stiffness of the bearing wave foil. Increasing bearing preload is one of the more popular methods at present, but it is usually difficult to adjust the preload during use, which cannot meet the requirements of adapting to various working conditions in practice. Contents of the invention [0003] In order to overcome the disadvantages of the above-mentioned prior art, the purpose of the present invention is to provide an elastic foil gas bearing with adjustable preload, whi...
Claims
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IPC IPC(8): F16C32/06
CPCF16C17/024F16C25/04
Inventor 耿海鹏杨柏松刘俊里高宇飞戚社苗虞烈丁春华尚亚坤
Owner XI AN JIAOTONG UNIV