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Thrust gas bearing of hydrostatic directional radiation groove

A technology of directional radiation and gas bearings, applied in the field of bearings, to achieve the effect of improving bearing capacity, supporting stiffness and uniform pressure distribution

Inactive Publication Date: 2009-09-16
SHANGHAI QIYUAN AIR SEPARATION TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, at present, gas bearings can only be used in turboexpanders with small flow rates.

Method used

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  • Thrust gas bearing of hydrostatic directional radiation groove
  • Thrust gas bearing of hydrostatic directional radiation groove
  • Thrust gas bearing of hydrostatic directional radiation groove

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Such as Figure 1~3 As shown, a static pressure directional radiation groove thrust gas bearing, the bearing includes a bearing body and a bushing, the thrust bearing surface 1 of the bearing body is provided with 32 ventilation holes 2, 16 directional radiation shallow Groove 3, 32 ventilation holes are arranged in two circles: 16 ventilation holes in the inner circle and 16 ventilation holes in the outer circle. The groove 3 has a depth of 0.1mm and a width of 0.8mm, so that the point source gas supply becomes a line source gas supply, so that the pressure distribution of the gas outlet is relatively uniform, and has the effect of surface throttling. The static pressure directional radiation groove of the present invention The gas bearing is applied to the supercharged turboexpander, which can improve the bearing capacity and support stiffness of the supercharged turboexpander bearing, and realize the large flow rate and high speed of the supercharged turboexpander. ...

Embodiment 2

[0017] see Figure 1~3 , a static pressure directional radiation groove thrust gas bearing, the bearing includes a bearing body and a bushing, and the thrust bearing surface of the bearing body is provided with 16 ventilation holes, 8 directional radiation shallow grooves, 16 The ventilation holes are arranged in two circles: 8 ventilation holes in the inner circle and 8 ventilation holes in the outer circle. The adjacent ventilation holes in the inner and outer circles are connected by a directional radiation shallow groove, and the depth of the directional radiation shallow groove is 0.2mm , The width is 1.0mm.

Embodiment 3

[0019] see Figure 1~3 , a static pressure directional radial groove thrust gas bearing, the bearing includes a bearing body and a bushing, and the thrust bearing surface of the bearing body is provided with 64 ventilation holes, 32 directional radiation shallow grooves, 64 The ventilation holes are arranged in two circles: 32 ventilation holes in the inner circle and 32 ventilation holes in the outer circle. The adjacent ventilation holes in the inner and outer circles are connected by a directional radiation shallow groove, and the depth of the directional radiation shallow groove is 0.05mm , The width is 0.5mm.

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PUM

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Abstract

The invention relates to a thrust gas bearing of a hydrostatic directional radiation groove. The bearing comprises a bearing body and a bush, a thrust bearing face of the bearing body is provided with a plurality of aeration pores which are arranged into inner ring aeration pores and outer ring aeration pores, and the adjacent aeration pores of the inner ring and the outer ring are connected through shallow grooves. Compared with the prior art, the thrust gas bearing has the advantages of improving the bearing capacity and supporting rigidity of a bearing of a booster expansion turbine, achieving larger flow and high rotating speed of the booster expansion turbine, and the like.

Description

technical field [0001] The invention relates to a bearing, in particular to a directional radial groove thrust gas bearing. Background technique [0002] Gas bearings have the advantages of low friction, low power consumption, low gas consumption, no pollution, low noise, simple structure and operation, and are widely used in high-speed turbo expanders. At present, turboexpanders with small flow rate and high speed generally adopt thrust gas bearings with a single row of ventilation holes. However, since the gas is continuously discharged into the atmosphere from the outer edge of the bearing, it does not have boundary lubrication capability. In high-speed operation, if the load of the gas bearing exceeds the specified limit, the direct contact of the solid will immediately cause the bearing to be stuck, resulting in damage to the bearing and the main shaft. Therefore, gas bearings are generally only used in turboexpanders with small flow rates. Contents of the invention...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16C32/06
Inventor 胡正平俞建
Owner SHANGHAI QIYUAN AIR SEPARATION TECH DEV