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Hydrostatic gas thrust bearing

A thrust bearing and gas technology, applied in the field of static pressure gas thrust bearings, can solve the problems of high manufacturing difficulty and high manufacturing cost, and achieve the effects of low processing cost, controllable quality and stable process

Active Publication Date: 2017-05-10
INST OF MACHINERY MFG TECH CHINA ACAD OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the disadvantages of the prior art that the processing and manufacturing of the static pressure gas thrust bearing is difficult and the processing and manufacturing cost is high, the present invention proposes a static pressure gas thrust bearing

Method used

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Embodiment 1

[0023] figure 1 It is a schematic diagram of the overall structure of the bearing of the present invention; FIG. 2 is a schematic diagram of a partial structure in the present invention; wherein, FIG. 2(a) is a top view of the bearing, FIG. 2(b) is a front view of the bearing, and I-I is in FIG. 2(b) The enlarged view of the orifice, II-II is the enlarged view of the microstructure groove in Fig. 2(b); image 3 is a cross-sectional view of the orifice in the present invention; Figure 4 It is a cross-sectional view of the microstructure groove in the present invention.

[0024] exist Figure 1~Figure 4 Among them, the static pressure gas thrust bearing of the present invention includes a thrust plate 1 and a bearing 3 with the same diameter, and the connection relationship is that the thrust plate 1 is located above the bearing 3, and the thrust plate 1 and the bearing 3 are coaxial. settings, such as figure 1 shown. The bearing 3 is evenly provided with a plurality of or...

Embodiment 2

[0036] The structure of this embodiment is the same as that of Embodiment 1, the difference is that, in this embodiment, the number of orifices is set to ten, and the shape of the microstructure cavity is a semicircle 15 . The number of microstructure grooves I8 and microstructure grooves II13 are both twenty, and the cross-sectional shapes are both inverted trapezoids 18 .

Embodiment 3

[0038] The structure of this embodiment is the same as that of Embodiment 1. The difference is that, in this embodiment, the number of orifices is set to ten, and the shape of the microstructure cavity is a triangle 16 . The bearing working surface is a complete plane without microstructure grooves.

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PUM

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Abstract

The invention provides a hydrostatic gas thrust bearing. The hydrostatic gas thrust bearing adopts an orifice with a microstructural cavity and a certain amount of microstructural tanks machined on a working face of the bearing, so that a gas flow is expanded for many times during a process of passing through the orifice and a gas film gap, throttling effects of the orifice and the gas film gap are increased by thermodynamic loss of the multiple times of expansion, and thus the purpose of improving rigidity is achieved. The bearing has the advantages of simple structure, low machining costs, stable technology and controllable quality, the rigidity of the bearing is higher than that of a traditional orifice restriction hydrostatic gas thrust bearing, and the production costs of the bearing are close to that of the traditional orifice restriction hydrostatic gas thrust bearing.

Description

technical field [0001] The invention belongs to a static pressure gas bearing, in particular to a static pressure gas thrust bearing. Background technique [0002] Due to the advantages of high precision, the small hole throttling static pressure gas thrust bearing has an irreplaceable important application in precision machine tools and precision measuring equipment. Bearing stiffness is the main performance index of pinhole throttling hydrostatic gas thrust bearing, and it is also the key to ensure bearing accuracy and accuracy retention. Small hole throttling static pressure gas thrust bearing generally adopts a small diameter orifice and a small gas film gap, so that the gas has a strong throttling effect in the process of passing through the throttle hole and the gas film gap, which is beneficial to Increased bearing stiffness. The common small hole throttled static pressure gas thrust bearing has a throttle hole diameter of 0.1~0.4mm and a gas film gap of 10~100µm. ...

Claims

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Application Information

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IPC IPC(8): F16C32/06
CPCF16C32/0622F16C32/0692F16C2322/39F16C2370/00
Inventor 郑越青吕磊阳红王宝瑞夏欢雷大江丁颖
Owner INST OF MACHINERY MFG TECH CHINA ACAD OF ENG PHYSICS