長行程氣壓缸中奈米潤滑特性研究

Nanoparticle as additive in lubricating oil for long stroke cylinder

樊晉民(Chin-Ming Fan)

指導教授 ： 鍾清枝

國立臺北科技大學/機電學院/製造科技研究所/碩士(2008年)

摘要

本文主要是針對研究長行程氣壓缸內部潤滑所作的研究。利用自行架設的長行程氣壓缸來模擬射出成型機的氣動門，研究並改善其氣動門因氣壓缸內部摩擦造成的黏滯滑動現象。一般在氣壓系統中所使用的三點組合潤滑油，由於黏度較低、油膜較薄等因素，在長行程氣壓缸上並不適用，此外液態的潤滑油容易散撥到空氣中造成污染，因此本研究特別使用固態的潤滑脂來做潤滑並進行比較。此外，為了更進一步改善氣壓缸內部的潤滑效果，本實驗將奈米粉體添加於潤滑油中，探討對長行程氣壓缸中磨潤特性的影響，並藉由不同黏度的潤滑油（脂）和不同種類的奈米粉體來做比較，取出最佳的潤滑方式。利用真空潛弧放電加工法將奈米顆粒添加於潤滑油中，並以動態特性檢測的方式對其摩擦力、壓力、速度、位置特性進行分析。實驗結果顯示，使用正確黏度的潤滑脂於長行程氣壓缸中，能夠有效的降低摩擦力以及減少其黏滯滑動現象。此外，添加不同種類的奈米粉體於潤滑油中，部份奈米粉體具有降低摩擦力的性能表現，其中又以添加二氧化鈦最為顯著，比較多組實驗的結果得知奈米粉體於兩接觸表面間之滾動摩擦方式取代原先的滑動摩擦，故奈米顆粒的外型是影響摩擦力的主要原因。

關鍵字

長行程氣壓缸 ； 潤滑油 ； 奈米粉體

並列摘要

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.

並列關鍵字

the long stroke cylinder ； lubricating oil ； nanoparticle

參考文獻

[7].簡依玲，微奈米磨潤下金屬材料磨耗行為之研究，碩士論文，崑山科技大學，台南，2005。

[26].崔偉哲，奈米粉體潤滑油之磨潤特性研究，碩士論文，國立臺北科技大學車輛工程系研究所，台北，2005。

[1].Van Varseveld, R. B., & Bone, G. M. “Accurate position control of a pneumatic actuator using on/off solenoid valves”. IEEE/ASME Transactions on Mechatronics, 2(3), 1997, pp. 195-204.

[2].Igor L. Krivts. “New Pneumatic Cylinders for Improving Servo Actuator Positioning Accuracy. Journal of Mechanical Design. Transactions of the ASME” , Vol. 126, 2004, pp. 744-747.

[3].J. Zhou, J. Yang, Z. Zhang, W. Liu, and Q. Xue, “Study on the Structure and Tribological Properties of Surface-Modified Cu Nanoparticles,” Materials Research Bulletin, vol. 34, no. 9, 1999,pp. 1361-1367.