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Static pressure air floating radial bearing

A technology of radial bearings and bearings, which is applied in the direction of air cushion bearings, bearings, shafts and bearings, etc., can solve the problems of synchronous improvement of stiffness and stability, insufficient reliability, and difficulty in bearing manufacturing, and achieve the goal of suppressing redundant gas Production, rigidity and stability synchronously improved, and the effect of low manufacturing cost

Pending Publication Date: 2019-08-02
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 solve the problem that the rigidity and stability of the small-hole throttling static pressure gas radial bearing in the prior art cannot be improved synchronously, and at the same time overcome the pr

Method used

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  • Static pressure air floating radial bearing
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Embodiment 1

[0024] figure 1 It is a schematic diagram of the overall structure of the viscous-inertial coupled throttling hydrostatic air bearing radial bearing of the present invention; figure 1 Among them, the viscous-inertial coupling throttling hydrostatic air bearing radial bearing of the present invention includes a bearing including a rotor 1 and a bearing base 2; the connection relationship is that the rotor 1 is located in the inner hole of the bearing base 2; the diameter of the rotor 1 is slightly smaller than The diameter of the inner hole of the bearing matrix 2 forms an air film 5 of a certain thickness between the outer cylindrical surface 3 of the rotor and the inner surface 4 of the bearing matrix when the air is supplied. figure 1 shown. Several first through holes 6 are opened along the circumferential direction on the bearing base 2; a cylindrical porous structure 7 is embedded in the first through holes 6; the upper surface 8 of the cylindrical porous structure is se...

Embodiment 2

[0032] The structure of this embodiment is the same as that of Embodiment 1, except that the pressure equalization chamber 15 is not provided in this embodiment, and the distance between the lower surface 14 of the cylindrical porous structure and the inner surface 4 of the bearing base is zero.

Embodiment 3

[0034] The structure of this embodiment is the same as that of Embodiment 1, except that the material of the cylindrical porous structure 7 in this embodiment is porous metal.

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Abstract

The invention discloses a static pressure air floating radial bearing. The bearing comprises a rotor (1) and a bearing base body (2), wherein the bearing base body (2) is provided with an inner hole;one end of the rotor (1) penetrates through the inner hole, and an air film (5) is arranged between an outer cylindrical surface(3) of the rotor (1) and an inner surface (4) of the bearing base body (2); and a plurality of first through holes (6) are formed in the bearing base body, a cylindrical porous structure (7) is inlaid in the first through holes (6), an air supply hole (10) is formed between the upper surface (8) of the cylindrical porous structure (7) and the outer surface (10) of the bearing base body (2), a second through hole is formed in the center of the upper surface (8) of thecylindrical porous structure (7), and the second through hole penetrates into the lower surface (14) of the cylindrical porous structure (7). According to the static pressure air floating radial bearing, problems of difficulty in improving small hole throttling stiffness and stability, insufficient reliability and high processing precision requirements of the porous throttling stiffness are overcame, and the static pressure air floating radial bearing has the advantages of being low in cost, stable in process and controllable in quality.

Description

technical field [0001] The invention belongs to the technical field of static pressure air bearings. In particular, it relates to a visco-inertia coupled throttling static pressure air bearing radial bearing. Background technique [0002] Small hole throttling hydrostatic gas radial bearings have the characteristics of high rotation precision, long life and no pollution, and are widely used in the field of ultra-precision machining. Bearing stiffness and stability are the main performance indicators of small-hole throttle hydrostatic gas radial bearings, and are the key to ensuring bearing accuracy and reliability. Higher bearing stiffness can be obtained by using a larger air supply pressure, but it will cause self-excited oscillation of the air hammer, resulting in the failure of the bearing to work normally. For small hole throttling air bearings, the method to improve bearing stiffness is to increase the air supply pressure, but with the increase of air supply pressure...

Claims

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Application Information

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IPC IPC(8): F16C32/06
CPCF16C32/0622
Inventor 杨光伟阳红刘有海张敏徐磊磊戴晓静孙守利尹承真
Owner INST OF MACHINERY MFG TECH CHINA ACAD OF ENG PHYSICS