| Summary: | 碩士 === 國立虎尾科技大學 === 動力機械工程系機械與機電工程碩士班 === 107 === In order to improve production efficiency and mechanical stability in response to Industry 4.0 intelligent production and automation processes, effective lubrication is a very important issue, this paper studies the relationship between moisture and particles on grease degradation and uses a fast and convenient optical inspection device for actual measurement, instantly monitor changes in grease performance to understand grease usage, it can be judged whether the equipment needs maintenance and maintenance, thereby greatly improving production efficiency and effectively reducing production costs.
This experiment is to observe the change of water and total acid value after adding water and particles, observing the change of wear scar, iron powder concentration and characteristic value after the deterioration of grease is accelerated by four-ball test. The experimental results show the relationship between the total acid value of lithium grease and water content, when the moisture increases, the total acid value also rises, when the moisture is 0.6 wt%, the total acid value has been replaced; Adding different proportions of water after the four-ball abrasion test, the total acid value doubled, the situation is quite serious need to replace the grease immediately; In the four-ball test, the friction coefficient increases as the grease is completely emulsified at 1.0 wt% of water content, and the grease is replaced immediately, And the wear scar is consistent with the trend of friction coefficient; In the optical experiment, the addition of water content 0.6 wt% characteristic value A decreased by 51 %, The characteristic value C increased by 44 % when 1.0 wt% of water was added to represent complete emulsification of the grease.
Adding different nano particles will cause an increase in total acid value, only the addition of Al2O3 20 nm causes a decrease in total acid value, which causes a decrease in the total acid value, and the most severe effect on the increase in total acid value at the same particle concentration is Fe2O3 30 nm, Followed by Fe 800 nm and SiO2 1000 nm, Finally SiO2 15 nm, the greater the particle diameter in the same particle condition, the greater the effect on the total acid value; Optical experiments were operated after adding nanoparticles, and the results showed that Fe2O3 had decreased a lot in characteristic value A at the same particle concentration of 1000 ppm, adding Fe2O3 characteristic value A decreased by 32.5 %; adding Al2O3 characteristic value B reduced 8.7%.
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