| Summary: | 碩士 === 國立臺北科技大學 === 製造科技研究所 === 96 === The principal research of this paper is about tribological properties in long stroke cylinder of pneumatic system. We use long stroke cylinder to simulate the pneumatic door of injection machine, and then improve the stick-slip phenomenon causing by friction in the cylinder. Most lubricat of pneumatic system is liquid. It’ s not a good condition to use this oil in long stroke cylinder. Because this oil has lower viscosity property and thinner film causing poor performance in long stroke cylinder. In additionl, liquid lubricant will spread out of air, it will cause pollution problem. Try to solve above problem, we using difference liquid and soild lubricants in long stroke cylinder. We find that solid lubricant has better performance than liquid. However, to reduce friction is not enough to use solid lubricant only. In this experiments, using Submerged Arc Nanoparticles Synthesis System (SANSS) to get nanoparticle, different nanoparticle add to lubricant, we analyze the dynamic characteristics which include friction, pressures, velocity and position. The experimental results show that exact of lubricat can reduce friction and stick-slip phenomenon in the cylinder. On the other side, some kind of nanoparticle as an additive for lubricant can reduce the friction, especially for the titanium dioxide nanoparticle. By comparing different experimental results, the rolling friction replaces the sliding friction on contacting surface. Therefore, this paper infers that the effect of solid-lubrication of nanoparticle werw the major tribology mechanism.
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