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A method for predicting the service life of silicone grease for bridge bearings

A technology of life prediction and bridge support, applied in the direction of material inspection products, etc., can solve the problems that the life prediction of silicone grease cannot be used, and achieve the effect of strong compliance and comprehensive conditions

Active Publication Date: 2018-12-21
LUOYANG SUNRUI SPECIAL EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The principle of time-temperature equivalence is to use the corresponding relationship between time and temperature to compare or convert the properties of polymers, so as to obtain some results that cannot be directly obtained from experimental measurements; according to the performance of silicone grease, temperature has a greater impact on the performance of silicone grease. Small, this method cannot be used to predict the life of silicone grease

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] According to the calculation of midas software, the total sliding displacement of a heavy-duty railway bearing within 100 years of design life is 70km, and the base oil content of silicone grease is reduced to 81.73% when it is calculated and used for 25 years. After 25 years under the effect of hot air aging The base oil content of the silicone grease is 85.44%. Under the joint action of the two factors, the base oil content of the silicone grease is 69.83% of the original grease. Assuming that the base oil content index when the silicone grease fails is 70%, the base oil content of the heavy-duty railway is 69.83% after 25 years of use, which is lower than the index of 70% base oil content when the silicone grease fails. The service life is 25 years.

Embodiment 2

[0027] According to the calculation of midas software, the total sliding displacement of the support design life of a passenger dedicated line within 100 years is 24.38km, and the base oil content of the silicone grease is reduced to 83.22% due to the mixing of wear debris after 40 years of use, and after 40 years under the effect of hot air aging The base oil content of the silicone grease is 83.79%. Under the joint action of the two factors, the base oil content of the silicone grease is 69.73% of the original grease. Assuming that the base oil content index when the silicone grease fails is 70%, the passenger dedicated line After 40 years of use, the base oil content in the silicone grease is 69.73%, which is lower than the index of 70% base oil content when the silicone grease fails, and the service life of the silicone grease is determined to be 40 years.

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Abstract

A method for predicting the service life of silicone grease for bridge supports is characterized in that the service life of the silicone grease can be accurately predicted by simulating the actual working conditions of the silicone grease in the support, combined with the influence of environmental factors on the lubrication performance of the silicone grease.

Description

technical field [0001] The invention relates to the field of service life of materials, in particular to a method for predicting the service life of silicone grease for bridge bearings, which can be applied to the service life evaluation of bridge accessories. Background technique [0002] At present, there are many methods for predicting the life of non-metallic materials, mainly linear relationship method - Arrhenius formula, variable conversion method - time-temperature equivalent principle and other methods. The Arrhenius formula method is mainly used in the life prediction of vulcanized rubber or thermoplastic rubber. This method is a common method in the industry. It is based on chemical reaction kinetics and assumes that the chemical reaction rate and physical and mechanical properties of the material during the thermal aging process change in the same manner. The linear relationship, the predicted conditions are far from the actual working conditions of silicone grea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/30
CPCG01N33/30
Inventor 张永兆姜文英王建彬仝延锋宋建平顾海龙
Owner LUOYANG SUNRUI SPECIAL EQUIP