Gas dynamic pressure bearing and manufacturing method thereof, and mechanical equipment

Abstract

The invention provides a gas dynamic pressure bearing and a manufacturing method thereof, and mechanical equipment. The gas dynamic pressure bearing comprises a bearing seat (1), an arch foil (2) anda top foil (3). The arch foil (2) is positioned between the bearing seat (1) and the top foil (3). The arch foil (2) comprises a connecting section (4) and an arch section. The connecting section (4)and the arch section are successively arranged along a circumferential direction of the arch foil (2), the connecting section (4) is connected between roots of the arch section, the arch section comprises a first arch section (5) and a second arch section (6), the first arch section (5) protrudes towards an outer circumferential wall of the top foil (3), and the second arch section (6) protrudes towards the inner circumferential wall of the bearing seat (1). According to the gas dynamic pressure bearing device, designs of various supporting rigidities and damping of the bearing can be achievedunder a condition that the arch foil material and a use amount are not changed, flexibility is high, design difficulty is small, and bearing with better performance can be designed.

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 elastic foil gas dynamic pressure bearings. For example, in the design process, after the number and specification of the arch foil protrusions are determined, the supporting stiffness and damping of the bearing are basically determined accordingly. Can no longer be changed, if you want to change the support stiffness of the bearing, you need to change the material or thickness of the arch foil, etc., resulting in increased design difficulty, reduced design flexibility, and greatly reduced the flexibility of bearing design

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