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Method for designing optimal static parameter of radial static pressure gas bearing of turbine expansion engine

A technology of static pressure gas bearing and turboexpander, which is applied in the directions of bearings, shafts and bearings, mechanical equipment, etc., can solve the problem of low precision and so on.

Inactive Publication Date: 2010-03-17
INST OF PLASMA PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for designing the optimal static parameters of a radial static pressure gas bearing of a turbo expander, aiming at the low accuracy of the design method of the radial throttle small hole static pressure gas bearing of a turbo expander, the design method Many factors are ignored in the derivation

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  • Method for designing optimal static parameter of radial static pressure gas bearing of turbine expansion engine
  • Method for designing optimal static parameter of radial static pressure gas bearing of turbine expansion engine
  • Method for designing optimal static parameter of radial static pressure gas bearing of turbine expansion engine

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Embodiment Construction

[0104] Such as figure 2 It is an existing imported Russian oil-gas mixed helium turboexpander radial throttle small hole static pressure gas bearing, the specific parameters are as follows: single row of gas supply, each row of gas supply small holes n=8, small hole diameter d= 0.5mm, air supply pressure p s =19bar, diameter air film thickness h 0 =0.045mm, bearing length L=28.5mm, journal diameter D=12mm, rated speed 180krpm. According to the above parameters, according to the design process of the design method of the present invention Figure 4 , the performance parameters of the gas bearing are calculated as follows: total flow M · = 0.337 g / s , Stiffness coefficient K W =2.33, carrying capacity W=1.06×10 2 N, frictional power loss F T =8.13W, the above results are very close to the performance parameters provided by Russian Turbine Corporation, and the calcul...

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Abstract

The invention relates to a method for designing optimal static parameters of a radial static pressure gas bearing of a turbine expansion engine, comprising the following steps: decomposing a journal bearing into a plurality of equivalent slits, listing a differential equation of gas movement, obtaining an equation about bearing capacity coefficient CW, bearing rigidity coefficient KW, total flow Mand the total frictional power loss FT based on the differential equation, and obtaining the optimal static parameters for a radial throttling hole static pressure gas bearing of the turbine expansion engine on the condition of different eccentricity ratios obtained through the equation of the bearing capacity coefficient CW, bearing rigidity coefficient KW, total flow M and the total frictionalpower loss FT. The invention can obtain four performance parameters reflecting the radial throttling hole static pressure gas bearing realized by calculation of one program, therefore, the determinedoptimal static parameters has high precision in engineering application and can be used for designing the radial throttling hole static pressure gas bearing of the turbine expansion engine with high rotation speed and special usage.

Description

technical field [0001] The invention relates to the field of bearing design, can be used to determine the best static parameters of radial throttle small hole static pressure gas bearings of turbo expanders, and is suitable for radial throttle small hole static pressure of various working gas turbo expanders The static design of the gas bearing can also be used in the performance calculation of the radial throttling small hole static pressure gas bearing. Background technique [0002] The gas bearing has the characteristics of high speed, low friction and less pollution. It is the most ideal form for the turbo expander and is also its core component. Compared with the dynamic pressure gas bearing, the static pressure gas bearing has the characteristics of high load capacity and stable operation. Due to the limitation of domestic processing level, there is no application of dynamic pressure gas bearing in China. Throttle orifice static pressure gas bearing is currently the m...

Claims

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Application Information

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IPC IPC(8): G06F17/50F01D25/16F16C32/06
Inventor 王学敏庄明傅豹丘立龙
Owner INST OF PLASMA PHYSICS CHINESE ACAD OF SCI
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