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Elastic bearing flat foil type thrust gas bearing of high speed surbine

A turbomachinery and elastic support technology, applied in the field of machinery, can solve the problems of large development investment, complex manufacturing process and high precision requirements, and achieve the effect of reducing damage and uniform surface stiffness

Inactive Publication Date: 2006-11-08
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although corrugated foil thrust bearings are a relatively mature form of foil bearings at present, the structure of the bearing is complex and the precision requirements are high. The performance of the bearing has a lot to do with the installation situation, and its manufacturing process is complicated. It takes a lot of work to determine the size, material selection and processing technology (including heat treatment and surface treatment), and the development investment is large.

Method used

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  • Elastic bearing flat foil type thrust gas bearing of high speed surbine
  • Elastic bearing flat foil type thrust gas bearing of high speed surbine
  • Elastic bearing flat foil type thrust gas bearing of high speed surbine

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Embodiment Construction

[0010] The structural principle and working principle of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0011] see figure 1 , 2, 3, the present invention is made up of several fan-shaped bearing housing blocks 2 with pre-wedge angles and fan-shaped elastic foils 4. The back of the fan-shaped elastic foils 4 is fixed with a fan-shaped elastic material support sheet 3 made of rubber, and It is fixed at the end with pre-wedge angle of the bearing pad 2 by the positioning pin 1. When the turbomachinery is running, the bearing and the rotor thrust surface 5 move relative to each other. Due to the compressibility and viscosity of the gas, the air film gap h in the wedge-shaped space 2 -h 1 Squeeze the air film, produce dynamic pressure effect, the pressure field supports the load; at the same time, the pressure field reacts on the fan-shaped elastic foil 4 and the elastic material supporting piece 3 fixed on the bea...

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Abstract

The gas thrust axle is composed of the fan-shaped bearing seat pad with the fore locking angle and the fan-shaped resilient foil fixed on it. The fan-shaped resilient supportor is fixed on the back of the foil, the foil is fixed on the pad by the locating pin. The force locking angle and the supportor of symmetrical stiffness enable the static, dynamic characteristic and stability. The friction between the rotor and bearing is surface contact thus reduce the hurt, when turbo mechanical movement happens, the bearing and the thrust face of the rotor move relatively, which reach the stable balance.

Description

technical field [0001] The invention belongs to a thrust gas bearing in the field of machinery, in particular to a high-speed turbomachinery elastic support flat foil type thrust gas bearing. Background technique [0002] A gas bearing is a fluid film lubricated bearing that uses gas as a lubricating medium, that is, a gas film is formed between the shaft and the bearing to avoid direct contact between the moving surface and the static surface. The method used by gas bearings is to use the viscosity of the gas to increase the pressure in the bearing gap, thereby causing objects to float. Among the foil-type thrust-pressurized gas bearings currently used in the field of high-speed turbomachinery, the corrugated foil structure in the United States is the most widely used. In the late 1970s, MiTi (Mohawk Innovative Technology Inc.) of the United States, with the support of the US Department of Energy and NASA, developed a corrugated foil type thrust pressure gas bearing. This...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16C32/06F01D25/16
CPCF16C17/042
Inventor 陈纯正侯予熊联友朱朝辉刘井龙
Owner XI AN JIAOTONG UNIV