Unit ring combined bump foil type radial air bearing

A technology of air bearings and unit rings, applied in the direction of bearings, bearing components, shafts and bearings, etc., can solve the problem of difficult axial positioning of the free end of wave chaff, affecting bearing capacity and rotor system operation stability, interference and even misalignment, etc. problems, to avoid axial interference and misalignment, to achieve the effect of easy process and simple processing

Active Publication Date: 2021-10-12
SUZHOU CHANGHENG PRECISION METAL DIE CASTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the actual operation of the bearing, the free end of the wave chaff is difficult to locate axially, and interference or even misalignment may occur, which affects the bearing capacity and the stability of the rotor system

Method used

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  • Unit ring combined bump foil type radial air bearing
  • Unit ring combined bump foil type radial air bearing
  • Unit ring combined bump foil type radial air bearing

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Embodiment Construction

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention.

[0035] Such as figure 1 , figure 2 As shown, the present invention proposes a unit ring combined wave foil type radial air bearing, which includes an outer bearing sleeve 1, end covers 11 located at both ends of the outer bearing sleeve 1, and the front and rear end covers 11 are passed through circumferentially evenly distributed screws 12 The threaded hole 18 on the outer bearing sleeve 1 and the light hole on the end cover 11 achieve axial fixation, thereby restricting the axial movement of the unit ring 4 and the top foil 3 . The fixing method of the screw connection is convenient for installation and disassembly, and avoids the influence of welding on the mechanical properties of the fixed end of the foil, thereby improving the stability of the process.

[0036] The ou...

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Abstract

The invention provides a unit ring combined bump foil type radial air bearing. The unit ring combined bump foil type radial air bearing comprises an outer bearing sleeve and end covers located at the two ends of the outer bearing sleeve, wherein a plurality of unit rings are arranged in the bearing sleeve, a top foil is connected in the unit rings in a clamped and closed mode, and the top foil axially extends into all the unit rings. According to the unit ring combined bump foil type radial air bearing, free combination of the unit rings with different waveforms and widths enables the bearing to realize targeted optimization adjustment of the bearing rigidity and the bearing width so as to meet the requirements of specific working conditions; the unit rings are easy to machine, the process is easy to realize, and installation is convenient; and in addition, the unit rings with the small axial widths are combined, the foil structure inclination rigidity can be reduced, compensation for shaft neck deflection is realized, and the impact resistance of a bearing-rotor system is improved.

Description

technical field [0001] The invention relates to the technical field of gas lubrication, in particular to a corrugated foil type radial air bearing which can realize optimal adjustment of bearing stiffness and width through free combination of unit rings. Background technique [0002] Air foil bearings are self-acting bearings with flexible surfaces that have been successfully used in various high-speed light-load turbomachinery, such as turbochargers and gas turbines. Compared with rigid air bearings, it has the advantages of high bearing capacity, low energy loss, high operating stability, and high tolerance to impurities. Among various structural types, corrugated foil radial air bearing is the most widely used, and it is mainly composed of three parts: bearing sleeve, corrugated foil and top foil. When rotating at high speed, the wedge-shaped lubricating air film provides bearing force for the journal. [0003] In the currently published patents on corrugated foil radia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16C32/06
CPCF16C17/024F16C33/06F16C2360/24
Inventor 安琦
Owner SUZHOU CHANGHENG PRECISION METAL DIE CASTING
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