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Method for determining specimen dry friction surface temperature field

A dry friction and temperature field technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as inability to obtain continuous steady-state output, cumbersome measurement work, and significant random error effects

Active Publication Date: 2017-08-04
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are many kinds of new materials, the measurement work is cumbersome, and the random error effect is significant
As a result, the final calculation results are easily inaccurate, and the data measured by non-contact methods also have errors and continuous steady-state output cannot be obtained

Method used

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  • Method for determining specimen dry friction surface temperature field
  • Method for determining specimen dry friction surface temperature field
  • Method for determining specimen dry friction surface temperature field

Examples

Experimental program
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Embodiment 1

[0066] A method for determining the temperature field of a dry friction surface of a sample. The concrete steps of this embodiment are:

[0067] Step 1: Measure the temperature of the dry friction surface of the sample

[0068] The material of the sample is ZA27; the cross section of the sample is circular, the diameter of the circle is 8mm, and the length of the sample is 30mm.

[0069] There is a temperature measuring hole near the dry friction surface of the sample, such as figure 1 As shown, there are 4 temperature measuring holes, and the center line of the temperature measuring holes intersects the center line of the sample. The temperature measuring holes are parallel to the friction surface and distributed evenly. The diameter of the temperature measuring holes is 1 mm, and the hole distance is 2 mm.

[0070] The temperature measuring holes are equipped with thermocouples, and each thermocouple is respectively connected with a thermometer.

[0071] The temperature o...

Embodiment 2

[0123] A method for determining the temperature field of a dry friction surface of a sample. The concrete steps of this embodiment are:

[0124] Step 1: Measure the temperature of the dry friction surface of the sample

[0125] The material of the sample is Zn-40Al; the cross section of the sample is square, the side length of the square is 6 mm, and the length of the sample is 22 mm.

[0126] There is a temperature measuring hole near the dry friction surface of the sample, such as Figure 4 As shown, there are 2 temperature measuring holes, the center line of the temperature measuring hole intersects the center line of the sample, the temperature measuring holes are parallel to the friction surface and distributed evenly, the diameter of the temperature measuring holes is 1mm, and the hole distance is 3mm.

[0127] The temperature measuring holes are equipped with thermocouples, and each thermocouple is respectively connected with a thermometer. When the sample is subject...

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Abstract

The invention belongs to a method for determining a specimen dry friction surface temperature field. According to the technical scheme, 1-5 temperature measurement holes are chosen on the surface of a specimen to fix thermocouples, and the thermocouples are connected to a temperature measurement instrument to conduct actual measurement on dry friction temperatures; using a finite element to simulate temperature values at the thermocouples on different warm boundary conditions, and establishing an error quadratic sum model between the temperature simulation values and actual temperature measurement values at all the thermocouples; with the purpose that quadratic sum between the temperature simulation values and the actual temperature measurement values is the smallest, using an optimal constraint function to optimize and determine a radiation heat transfer efficient of a specimen dry friction surface to environment, a contact heat transfer coefficient of a grinding wheel, a contact heat transfer coefficient of a grinding disc, a specimen dry friction surface, and a heat source density of a specimen dry friction surface, and in this way, determining a material dry friction surface and a dry friction temperature field near the material dry friction surface. The method for determining the specimen dry friction surface temperature field is simple, reliable in result and low in cost; the determined temperature is close to reality, the critical temperature can be predicted when a material generates abrasion, and basic data is provided for design of the material and optimization.

Description

technical field [0001] The invention relates to the technical field of sample dry friction. In particular, it relates to a method for determining the temperature field of a dry friction surface of a sample. Background technique [0002] Friction and wear exist almost all the time in the transmission field, and the friction and wear phenomena related to heavy industry, transportation industry and nuclear industry put more emphasis on safety research. The temperature rise rate and temperature distribution of the friction parts under high-speed and heavy-load conditions are the core that directly affects the working performance, service life and safety guarantee of the entire transmission system, and the material wear under most working conditions is ultimately due to friction between the friction pairs. Therefore, it is very important to study the temperature change characteristics of dry friction and wear of materials. [0003] It is difficult to measure the wear temperatur...

Claims

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Application Information

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IPC IPC(8): G06F19/00
CPCG16Z99/00
Inventor 刘升项奔高标徐光李立新
Owner WUHAN UNIV OF SCI & TECH
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