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Measuring method of interface sliding length of stepped bearing

A technology of stepped bearings and measurement methods, applied in the direction of measurement devices, surface/boundary effects, instruments, etc., to achieve the effects of convenient data acquisition, strong practicability, and improved system life

Active Publication Date: 2013-12-11
QINGDAO TECHNOLOGICAL UNIVERSITY +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But this method can only be used for interfacial slip measurement of elastohydrodynamic oil film

Method used

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  • Measuring method of interface sliding length of stepped bearing
  • Measuring method of interface sliding length of stepped bearing
  • Measuring method of interface sliding length of stepped bearing

Examples

Experimental program
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Embodiment Construction

[0032] The concrete implementation condition of this embodiment:

[0033] Ambient temperature 20±1℃, relative humidity 50±5%;

[0034] The transparent disc is a K9 glass disc, and the surface of the glass disc is coated with chrome film and silicon dioxide film (Cr+SiO 2 ), the reflectivity is 20%, and the surface roughness Ra is 4nm;

[0035] The material of the stepped slider is selected as bearing steel, and the size of the working surface is 18mm×6mm, , , the working surface is a precision polished surface with high reflectivity, and the surface roughness Ra is 8-12nm;

[0036] The lubricating oil is simethicone-200, its dynamic viscosity (20°C) is 200mPa.s, the refractive index is 1.4, and the load is 4N.

[0037] Further description will be made below in conjunction with the accompanying drawings.

[0038] The miniature slider bearing lubricating oil film measuring instrument used during the measurement of the present invention is as figure 1 shown.

[0039] T...

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Abstract

The invention provides a measuring method of the interface sliding length of a stepped bearing. The measuring method of the interface sliding length of the stepped bearing comprises the steps of (1) setting measurement working parameters, carrying out pre-adjustment on the measurement working parameters, (2) measuring the thickness of oil film, (3) calculating the sliding speed, and (4) calculating the sliding length. The measuring method of the interface sliding length of the stepped bearing is reliable and easy to achieve, and due to the fact that a miniature sliding block bearing lubricating oil film measuring instrument is used for measuring the interface sliding length of the stepped bearing under the condition that the thickness of the lubricating oil film is of a micron / submicron level, important instructive data are provided for achievement of the purposes of reducing friction, surface resistance and power consumption, and prolonging the service life of a precise electromechanical system in the design of the precise electromechanical system.

Description

technical field [0001] The invention relates to a method for measuring the interfacial slip length, in particular to a method for measuring the interfacial slip length of a stepped bearing under the condition of micron or submicron film thickness, and belongs to the technical field of surface contact fluid lubrication experiment measurement. Background technique [0002] The classical lubrication theory generally believes that when the liquid flows on the solid surface, the fluid adjacent to the solid surface will move with the solid at the same speed, that is, there is no interfacial slip between the lubricating oil film and the solid surface, which is called the "no-slip boundary condition". ". With the development of micro / nano technology and related fields, people rely on some modern testing methods (such as atomic force microscope (AFM), surface force instrument (SFA), near-field laser velocimeter (NFLV), microparticle imaging technology (μ -PIV), etc.) and molecular d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/02G01N13/00
Inventor 郭峰白清华黄柏林杨淑燕
Owner QINGDAO TECHNOLOGICAL UNIVERSITY
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