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High-reliability closed spool type dynamic pressure bearing

A dynamic pressure bearing, closed technology, used in shafts and bearings, sliding contact bearings, bearings in rotary motion, etc., can solve the problems of low stiffness and low start-stop reliability, achieve low friction coefficient, high travel accuracy, The effect of improving bearing stiffness

Active Publication Date: 2019-04-05
XIAN AEROSPACE PRECISION ELECTROMECHANICAL INST
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a highly reliable closed bobbin type boron carbide material dynamic pressure bearing to solve the problems of low rigidity and start-stop reliability of the current bobbin type dynamic pressure bearing

Method used

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Embodiment Construction

[0028] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the protection scope of the present invention cannot be limited by this embodiment.

[0029] from figure 1 It can be seen that the dynamic pressure bearing in this embodiment includes the main shaft 4, the shaft sleeve 3, the bearing rotor 1, the thrust plate 2 and the compression nut 5, the shaft sleeve 3 is set on the main shaft 4 and fixedly matched with the main shaft 4, and the bearing rotor 1 is fitted with the bushing and moves relative to each other to form a radial closed bearing. The thrust plate 2 is located on both sides of the bushing 3 and forms an axial bearing with the bearing rotor 1. The thrust plate 2 is made of structural tool steel (for example: chrome-tungsten-manganese material), the bearing rotor 1 is made of fine-grained boron carbide material, the bushing 3 is made of fine-grained boron carbide m...

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Abstract

The invention relates to a high-reliability closed spool type dynamic pressure bearing. The high-reliability closed spool type dynamic pressure bearing comprises a spindle, a bearing rotor installed on the spindle in a sleeving mode, a spindle sleeve located between the spindle and the bearing rotor and thrust plates installed at the two ends of the spindle in a sleeving mode respectively. According to the dynamic pressure bearing, the spindle sleeve is additionally arranged on the spool bearing structure, the spindle sleeve is fixed to the spindle and forms a closed spool type structure withthe bearing rotor, the thrust plates each adopt a special slope structure, external air flow is pumped into an axial bearing body and a radial bearing body through the thrust plates with the special slopes, pressure distribution is formed in a bearing working clearance, the pressure in the bearing maintains the dynamic stability after the rotation speed is stable, and the bearing rigidity problemand the axial bearing body starting and stopping friction problem are solved; an axial compressing nut adopts an elastic compressing structure, and therefore it is guaranteed that the bearing axial clearance keeps stable at different temperatures; and a radial bearing friction pair adopts a boron carbide-boron carbide mode, a thrust axial friction pair adopts a boron carbide-structural steel mode,and therefore the bearing contact friction and wear problems are further solved.

Description

technical field [0001] The invention relates to a dynamic pressure bearing, in particular to a highly reliable closed bobbin type boron carbide material dynamic pressure bearing. Background technique [0002] The dynamic pressure bearing motor is the "heart" of the three-float gyro instrument. As the core component of the dynamic pressure motor, the dynamic pressure bearing is the core component of the dynamic pressure motor. Its reliability and stability determine the accuracy and life of the three-float gyro instrument. Wide range of applications. [0003] The spool type dynamic pressure bearing is a structural form of the dynamic pressure bearing. Its structure is divided into two parts: the radial bearing and the axial bearing, which provide axial support and radial support for the bearing. The working gap of the dynamic pressure bearing is only 1μm~ 3μm, the dynamic pressure bearing relies on the relative movement of the rotor and the stator to make the inlet air flow ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16C17/10F16C33/02
CPCF16C17/10F16C33/02
Inventor 张海雄樊理任建涛闫亚超曹耀平车长杰杨延军谷研杜剑
Owner XIAN AEROSPACE PRECISION ELECTROMECHANICAL INST
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