Aerodynamic bearing, manufacturing method thereof and mechanical device

Abstract

The present application provides an aerodynamic bearing, a manufacturing method thereof and a mechanical device. The aerodynamic bearing comprises a bearing pedestal, an arch foil and a top foil, wherein the arch foil is located between the bearing pedestal and the top foil and comprises connecting sections and arch sections, which are sequentially arranged in a circumferential direction of the arch foil; the connecting sections are connected between roots of the arch section; and the arch sections protrude toward an inner peripheral wall of the bearing pedestal, which comprises grooves corresponding to the arch sections. The aerodynamic bearing further comprises an adjusting structure for adjusting a circumferential position of the arch foil relative to the bearing pedestal. The adjustingstructure adjusts the circumferential position of the arch foil to make the arch sections slide into or out of the grooves. The aerodynamic bearing provided by the present application can be pre-tightened so as to be improved in bearing capacity and working performance.

Description

technical field [0001] The present application relates to the technical field of bearings, in particular to an aerodynamic pressure bearing, a manufacturing method thereof, and mechanical equipment. Background technique [0002] Elastic foil gas dynamic pressure bearing is a technical special bearing with high speed, low power consumption and high precision support. The bearing has the characteristics of no lubricating fluid, no pollution, no contact with the bearing, low loss, high working speed, low maintenance cost and long service life. This support technology has been widely used in centrifugal compressors, fans, high-speed pumps, high-speed machine tools and other machinery abroad. [0003] Elastic foil radial bearing structure such as figure 1 As shown, the bearing seat 1, the arch foil 2, and the top foil (flat foil) 3 are composed. The arch foil is installed on the bearing base (bearing housing), and the top foil is above the arch foil. The front edges of the ar...

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Problems solved by technology

[0004] However, there are also many unfavorable factors for the elastic foil gas dynamic pressure bearing. During the working process of the elastic foil gas dynamic pressure bearing, due to the elastic deformation of the arch foil 2 and the top foil 3, the elastic foil gas The dynamic pressure bearing will produce a certain elastic deformation during the loading process. This part of the elastic deformation cannot play an effective load-bearing role, so it will reduce the overall bearing capacity of the bearing.

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