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A Small Orifice Throttle Hydrostatic Thrust Gas Bearing with Accompanying Orifice

A gas bearing and orifice technology, applied in the direction of bearings, shafts and bearings, mechanical equipment, etc., can solve the problems of bearing micro-vibration, affecting the working stability of the system, affecting the working accuracy of the bearing, etc., to reduce micro-vibration, suppress Vortex development, the effect of improving work stability

Active Publication Date: 2022-04-26
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the working accuracy and positioning accuracy of ultra-precision equipment are close to the nanometer or even sub-nanometer level, the impact of this micro-vibration will seriously affect the bearing working accuracy
When there is external energy input, this micro-vibration will be rapidly amplified, thus affecting the working stability of the entire system
[0004] Therefore, it is urgent to develop a new gas bearing that can solve the problem of bearing microvibration caused by the large-scale vortex structure in the pressure chamber.

Method used

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  • A Small Orifice Throttle Hydrostatic Thrust Gas Bearing with Accompanying Orifice
  • A Small Orifice Throttle Hydrostatic Thrust Gas Bearing with Accompanying Orifice
  • A Small Orifice Throttle Hydrostatic Thrust Gas Bearing with Accompanying Orifice

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Embodiment Construction

[0030] figure 1 It is a schematic cross-sectional view of a small-hole throttling hydrostatic thrust gas bearing with an associated throttling hole according to an embodiment of the present application when it is in operation. figure 2 yes figure 1 A schematic cross-sectional view of an orifice throttle hydrostatic thrust gas bearing with an accompanying orifice is shown. image 3 yes figure 1 Schematic top view of an orifice throttle hydrostatic thrust gas bearing with accompanying orifice shown. Figure 4 yes image 3 Schematic enlargement of the pressure chamber and orifice shown in .

[0031] Such as figure 1 shown, see also Figure 2-Figure 4 , this embodiment provides a small-hole throttling static pressure thrust gas bearing with an accompanying orifice, which generally includes a bearing body 1, an air intake chamber 2, a main orifice 3, and an accompanying orifice 4 and pressure chamber 5. The bearing body 1 has a thrust surface. The air inlet chamber 2 is o...

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Abstract

The application discloses a small hole throttling static pressure thrust gas bearing with accompanying throttling holes, relating to the gas bearing. The air inlet chamber of the bearing is opened along the normal direction of the thrust surface of the bearing main body. The main throttling hole and multiple accompanying throttling holes are connected to the end of the intake cavity, and the main throttling hole is parallel to the axis of the intake cavity. The axis of the accompanying orifice is evenly distributed on the circumference at a distance R from the axis of the main orifice. The axis of the companion orifice is parallel to the axis of the main orifice. The pressure chamber is vertically communicated with the end of the main orifice and the accompanying orifice, and the pressure chamber is coaxial with the main orifice. The flow of the main orifice vertically impacts on the bearing surface to provide the main bearing capacity. Along with the generation of large-scale vortex structure in the pressure chamber, the flow of the accompanying orifice around the main orifice rushes into the pressure chamber vertically and destroys the vortex structure. Reduce the size of the vortex, inhibit the development of the vortex, and then reduce the pressure difference between the inside and outside of the vortex, reduce the micro-vibration of the bearing, and then improve the working stability of the bearing.

Description

technical field [0001] The application relates to the field of gas bearings, in particular to a small-hole throttling static pressure thrust gas bearing with accompanying throttling holes. Background technique [0002] Gas bearings are widely used in precision and ultra-precision machining equipment because of their high speed, precision, low friction, high temperature resistance, long life, simple structure, no pollution or less pollution. Although gas bearings have higher load-carrying capacity and stiffness. However, with the continuous improvement of precision requirements in the field of ultra-precision machining, micro-vibration phenomena that have a significant impact on the precision of gas bearings can no longer be ignored. [0003] The following is an example of the small-hole throttle static pressure gas bearing in the gas bearing: the pressure chamber of the small-hole throttle static pressure gas bearing is an important part, which can improve the bearing capac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16C32/06
CPCF16C32/0618
Inventor 李育隆温雅茗连华奇容诚钧
Owner BEIHANG UNIV
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