Aerostatic radial bearing with adjustable throttling hole parameters and centrifugal fan

A technology of radial bearing and orifice, which is applied in the field of high-speed rotating machinery, can solve the problems of limiting the application range of static pressure gas radial bearings, achieving the best bearing stiffness, and difficulty in operation, so as to broaden the application range and improve the stiffness. and bearing capacity, the effect of easy disassembly and assembly

Pending Publication Date: 2022-05-17
NORTHWEST A & F UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, traditional static pressure gas radial bearings mostly adopt the method of directly drilling holes on the outer cylindrical surface of the bearing to set the throttle hole. This drilling method is not only difficult to operate, but also the drill bit is easy to break during drilling; in addition, the rotor and The center of the bearing will be eccentric due to the action of the load. In order to reduce the difficulty of processing, the orifice hole with the same diameter directly drilled can not make the bearing rigidity optimal; when the load changes or the lubricating medium changes, the bearing needs to be re-drilled. Design and production increase the cost and limit the scope of application of hydrostatic gas radial bearings with the same main shaft diameter

Method used

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  • Aerostatic radial bearing with adjustable throttling hole parameters and centrifugal fan
  • Aerostatic radial bearing with adjustable throttling hole parameters and centrifugal fan
  • Aerostatic radial bearing with adjustable throttling hole parameters and centrifugal fan

Examples

Experimental program
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Effect test

Embodiment 1

[0027] The structure of a static pressure gas radial bearing with adjustable orifice parameters of the present invention is as follows: figure 1 As shown, there is an air supply hole 1 on the outer cylindrical surface of the bearing, and a threaded hole 2 is opened below the air supply hole 1; the upper end of the threaded hole 2 communicates with the air supply hole 1, and the lower end is located on the working surface of the bearing; A screw 3 is arranged in the threaded hole 2, and a throttling hole 4 is opened on the screw 3.

[0028] Such as figure 1 As shown, the air supply hole 1 is coaxial with the threaded hole 2, and the diameter of the air supply hole 1 is greater than or equal to the diameter of the threaded hole 2; the throttle hole 4 is coaxial with the external thread on the screw.

[0029] Such as figure 1 As shown, the screw 3 and the threaded hole 2 are sealed with thread fastening glue or raw tape.

[0030] Such as figure 1 As shown, when the screw 3 co...

Embodiment 2

[0038] Such as Figure 5 , Figure 6 As shown, the structure of this embodiment is the same as that of Embodiment 1. The difference is that in this embodiment, the threaded holes are distributed in four rows along the axial direction of the bearing, and the number of threaded holes in each row is 16. If Change the number of throttling holes, and use screws with throttling holes and screws without holes at intervals in each row of threaded holes; the distance between the first row of threaded holes 21 and the end face of the bearing seat is L2, and the distance between the second row of threaded holes The distance between the threaded hole 22 and the bearing seat is L1. If the distance between the face and the face is L1, the first row of threaded holes 21 and the fourth row of threaded holes 24 use screws without holes, and the other two rows use screws with holes; if When the end-to-face distance is required to be L2, the second row of threaded holes 22 and the third row of ...

Embodiment 3

[0040] Such as Figure 7 As shown, the structure of this embodiment is the same as that of Embodiment 1, the difference is that in this embodiment, the same row of screws (3) distributed along the circumferential direction have different orifice holes (4) with different diameters.

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Abstract

The invention discloses a static pressure gas radial bearing with adjustable throttling hole parameters and a centrifugal fan, and relates to the field of high-speed rotating machinery. An air supply hole is formed in the outer cylindrical surface of the bearing, and a threaded hole is formed below the air supply hole; the upper end of the threaded hole communicates with the air supply hole, and the lower end of the threaded hole is located on the bearing working face. Screws are arranged in the threaded holes, throttling holes are formed in the screws, and the screws are divided into multiple specifications according to different hole diameters of the throttling holes. The static pressure gas radial bearing is simple in structure and convenient to manufacture, the throttling effect of the throttling holes and the bearing gap is changed by replacing different screws, and then the rigidity and the bearing capacity of the static pressure gas radial bearing are adjusted; and the screws are easy to disassemble and assemble, the throttling hole parameters can be conveniently adjusted according to actual requirements, the same bearing can be used under the conditions of different working media and different loads, and the application range of the bearing is widened.

Description

technical field [0001] The invention relates to the technical field of high-speed rotating machinery, in particular to a static pressure gas radial bearing and a centrifugal fan with adjustable orifice parameters. Background technique [0002] Static pressure gas radial bearings use working gas as a lubricant, and have the advantages of no oil, small friction loss, long working life, and high motion precision. and other technical fields have been widely used. Bearing stiffness is the main performance index of hydrostatic gas radial bearings, and it is also the key to ensure bearing accuracy and accuracy retention. The small-hole throttling static pressure gas radial bearing adopts a smaller-diameter orifice and a smaller bearing gap, so that the gas has a strong throttling effect in the process of passing through the orifice and the bearing gap, thereby ensuring the bearing to obtain High stiffness. [0003] At present, traditional static pressure gas radial bearings most...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16C32/06F16C35/02
CPCF16C32/0622F16C35/02
Inventor 杨山举化文灿单筱军王琪邓海涛张惠铭
Owner NORTHWEST A & F UNIV
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