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Method and apparatus for measuring static pressure film thickness

A technology of oil film thickness and measurement method, which is applied in the direction of measuring devices, instruments, etc., can solve the problems of high measurement cost and complicated process, and achieve the effect of good repeatability and simple and easy measurement method

Inactive Publication Date: 2008-04-09
TIANJIN UNIVERSITY OF TECHNOLOGY
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

Most of these traditional oil film thickness measurement methods require special complex instruments and equipment assistance to obtain the measurement results of oil film thickness. The measurement cost is high and the process is complicated.

Method used

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  • Method and apparatus for measuring static pressure film thickness

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Experimental program
Comparison scheme
Effect test

Embodiment

[0022] Adopt the method of the present invention to " stainless steel thin plate deep-drawing is used nano-copper lubricant " oil film thickness and common deep-drawing lubricant, have carried out comparative test:

[0023] 1. The experimental load ranges from 0.5Mpa to 3.5Mpa. The measured oil film area and calculated oil film thickness data are shown in Table 1 and Table 2 respectively.

[0024] Table 1 Data of ordinary deep drawing lubricants

[0025] load

(MPa)

0.5

1

1.5

2

2.5

3

3.5

Oil film diameter

(mm)

40

59.5

65

71

80

88.5

93.5

Oil film area

(mm 2 )

1256

2779

3316.6

3957.2

5024

6148.3

6862.7

Oil film thickness

(μm)

22.13

10.00

8.38

7.03

5.53

...

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Abstract

The invention relates to a method and device used for testing the thickness of a hydrostatic oil film. The method is that: tested lubricant is dropped between two involutive tablettings and is arranged in a universal electrical tensile tester to be added pressure and is pressurized; the two tablettings are taken out and dipping space is tested with a tri-seat board tester according to the edges of the dipped trace of the tested lubricant in mat glass pieces; the thickness of the oil film equals to the volume of the tested lubricant divided by dripping area. The invention also designs specially a device for the method of the measurement of the thickness of the hydrostatic oil film. The measuring method that the invention discloses is simple and easy, and does not need a complicated testing device; after being pressurized by the mat glass pieces, the two mat glass pieces are not needed to be opened and the area of the oil film can be observed directly; the thickness of the oil films in different hydrostatic loading can be pressurized and tested continuously; at the same time, the method has good repetitiveness.

Description

【Technical field】 [0001] The invention relates to a method and a device for measuring the thickness of a lubricating oil film, in particular to a method and a device for measuring the thickness of a static pressure oil film. 【Background technique】 [0002] Lubrication plays an important role in the machinery industry, and measuring the thickness of the hydrostatic oil film is one of the indicators for evaluating the lubrication performance. At present, the thickness measurement methods of oil film mainly include: (1) Utilize NGY-2 nanoscale oil film thickness instrument (researched and developed by State Key Laboratory of Tribology of Tsinghua University), which includes measurement system, mechanical system, image acquisition system, according to relative According to the light intensity principle, the relative intensity of the interference light at each point will be deleted, and the light field will be homogenized along the light intensity on the line, and then the film t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B21/08G01B21/28
Inventor 毕大森张建焦丽娜武晋
Owner TIANJIN UNIVERSITY OF TECHNOLOGY