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Liquid dynamic pressure bearing

A hydrodynamic pressure and bearing technology, which is applied in the direction of sliding contact bearings, rotating bearings, bearings, etc., can solve problems such as vibration and shaft center track deviation, improve rotation accuracy, suppress journal vibration, and improve The effect of sensitivity

Pending Publication Date: 2020-10-09
QINGDAO UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the journals of some existing hydrodynamic pressure shafts are prone to vibration, resulting in the deviation of the shaft center trajectory

Method used

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Experimental program
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Effect test

Embodiment 1

[0034] Embodiment 1, refer to Figure 1-Figure 4 , figure 1 It is a structural schematic diagram of a hydrodynamic bearing of the present invention; figure 2 It is a transverse sectional view of a hydrodynamic bearing of the present invention; image 3 It is an axial view of a hydrodynamic bearing of the present invention; Figure 4 It is a structural schematic diagram of the baffle in the present invention.

[0035] A hydrodynamic bearing, comprising a bearing 1, and a journal 2 matched with the bearing 1, the bearing 1 comprises a body 11, and further comprises:

[0036] At least three pressing plates 13, the pressing plates 13 are evenly spaced on the inner cylindrical surface of the body 11;

[0037] The elastic film 12 is surrounded by the pressure plate 13 on the inner cylindrical surface of the body 11; the elastic film 12 forms a film connection position 124 at the connection position of the pressure plate 13, and is formed between two adjacent pressure plates 13 ...

Embodiment 2

[0051] Embodiment 2, refer to Figure 1-Figure 6 , Figure 5 It is a structural schematic diagram of the middle pressure plate of the present invention; Figure 6 It is a perspective view of lubricating oil circuit in the present invention.

[0052] The side of the main body 11 is provided with an annular groove 1115 and a baffle 18 covering the annular groove 1115, the baffle 18 and the annular groove 1115 are enclosed to form a closed annular oil supply chamber; The hole C181 is installed on the side of the body 11 .

[0053] The outer cylindrical surface of the body 11 is provided with a first main oil supply hole A113 and a second main oil supply hole B114, and the elastic film 12 and the pressure plate 13 are respectively provided with a coaxial film through hole 125 and a pressure plate through hole 133; The first main oil supply hole A113 and the second main oil supply hole B114 communicate with the annular oil supply chamber respectively, and the annular oil supply ...

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Abstract

The invention discloses a liquid dynamic pressure bearing and relates to the technical field of bearings. The liquid dynamic pressure bearing comprises a bearing and a journal matched with the bearing. The bearing comprises a body and further comprises at least three pressure plates, elastic films and cylindrical cavities, wherein the at least three pressure plates are uniformly arranged in a spaced manner on the inner cylindrical surfaces of the body; the elastic films wind the inner cylindrical surfaces through the pressure plates; the cylindrical cavities are formed between adjacent two pressure plates of the inner cylindrical surfaces of the body; and the cylindrical cavities correspond to the pressure plates in quantity. By stretching and shortening a piezoelectric ceramic driver to act on a thrust semisphere to push the films to move radially in a plane so as to further drive the semi-cylinders to move radially, the sizes of wedge gaps A and B are controlled actively, so that thedynamic pressure is controlled. The product of the dynamic pressure and an area is an oil film force, that is, the oil film force is controlled to inhibit vibration of the journal and control the track of axis.

Description

technical field [0001] The invention relates to the technical field of bearings, in particular to a hydrodynamic bearing. Background technique [0002] Sliding bearings are bearings that work under sliding friction. According to the way it generates oil film pressure, it can be divided into two types: dynamic pressure bearing and static pressure bearing. The dynamic pressure bearing is lubricated by hydrodynamic pressure when it is working, and the friction only occurs between the molecules of the lubricant, so the frictional resistance is very small, and the sliding surface is not easy to wear. It is an ideal working state. It has stable operation, simple structure, low noise Small, with greater rigidity and anti-overload capacity and other characteristics. [0003] Hydrodynamic bearings are divided into hydrodynamic radial bearings and hydrodynamic thrust bearings. Hydrodynamic radial bearings are divided into single oil wedge and multi-oil wedge. There are two or more ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16C17/03
CPCF16C17/035
Inventor 张永涛于世杰张警丹刘致远
Owner QINGDAO UNIV OF SCI & TECH
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