| 摘要: |
| 目的 研究适配器PTFE层氟化石墨填充改性后的摩擦磨损性能，提高适配器的耐磨性。方法 以质量分数为2%, 5%, 8%, 11%的氟化石墨为填料制备PTFE基复合材料，分别在20, 40, 60, 80 r/min的转速下测试试样摩擦因数。通过三维视频显微镜采集试样表面磨损数据，并计算其体积磨损率。扫描电子显微镜（SEM）观察磨痕微观形貌。结果 同一转速下，试样的摩擦因数随着氟化石墨质量分数的增加而增大。填充氟化石墨能显著降低试样的体积磨损率，填充物质量分数超过8%后，试样体积磨损率趋于稳定，试样摩擦因数得到明显增大。结论 氟化石墨填充PTFE层可显著提高适配器的耐磨性，但质量分数不能超过8%，否则，会造成适配器与运输筒间的摩擦因数增大，增加航天器装填及出筒阻力。 |
| 关键词: 适配器 PTFE 氟化石墨 摩擦 磨损 |
| DOI：10.19554/j.cnki.1001-3563.2018.17.006 |
| 分类号:TQ325.4 |
| 基金项目: |
|
| Friction and Wear Properties of Adapter PTFE Layer Filled with Fluorographite Polymer |
|
GUAN Qiang-qiang, QIANG Bao-min, GUO Jun-bin, LI Peng-hui, PAN Rong-an
|
|
Rocket Force University of Engineering, Xi'an 710025, China
|
| Abstract: |
| The work aims to study the friction and wear properties of adapter PTFE layer filled with fluorographite polymer. PTFE-based composites were prepared by fluorographite polymer with mass fractions of 2%, 5%, 8% and 11% and the friction coefficient was respectively tested at 20, 40, 60 and 80 r/min. The surface abrasion data of samples were collected by 3D video microscope and the samples' volume wear rate was calculated. The micro-morphology of the abrasion marks was observed by SEM. The friction coefficient of samples was increased with the increase of the mass fraction of fluorographite polymer at the same speed. The volume wear rate could be significantly reduced after fluorographite polymer was filled. When the mass fraction of the filler was over 8%, the volume wear rate of samples tended to be stable and the friction coefficient was remarkably increased. The PTFE layer filled with fluorographite polymer can significantly improve the wear resistance of the adapter, but the mass fraction should not exceed 8%; otherwise, the friction between the adapter and the transport cylinder will increase, thus increasing the filling and tube-exit resistance of the spacecraft. |
| Key words: adapter PTFE fluorographite polymer friction wear |
渝公网安备 50010702501716号