液体润滑油热驱动蠕爬特性及表面形貌的影响
首发时间:2017-01-16
摘要:润滑油蠕爬损耗已经成为空间机构丧失润滑能力的主要原因。"蠕爬"是指润滑油在接触表面不受作用而不断扩展的行为。利用自制的润滑油蠕爬特性测试平台,分别对抛光处理、喷砂处理、磨削处理的三种典型机械加工表面蠕爬特性进行研究,结果表明:表面微结构不同会影响润滑油在其表面的润湿性,产生促进或者阻碍润滑油流动的效果。润滑油在磨削表面蠕爬速度远高于抛光表面速度,而喷砂表面蠕爬速度略低于抛光表面,喷丸处理是防止摩擦副表面润滑油蠕爬流失的有效手段;在其他条件保持不变的情况下,减小润滑油体积或者增大润滑油粘度,均能够降低蠕爬速度,阻碍润滑油蠕爬流失。
For information in English, please click here
Thermal Driven Migration Characteristics of Liquid Lubricants and the Influence of Surface Texture
Abstract:Lubricant migration is one of the most significant factors which can result in the failures of space devices. Here, migration is a phenomenon that lubricant can freely expand on a contact surface without external forces. Specimens with different surface structures were manufactured by polishing processed, shot-blasted, and grinding processed respectively. The migration behavior of liquid lubricants on each specimen was investigated using a home-built testing equipment. The experimental results show that surface texture has a strong influence on the migration behavior. Migration velocityInfluence of Surface Texture on the Thermocapillary Migration of Liquid Lubricants on grinding surface is quite fast than that on polishing surface, and shot-blasted surface achieves the slowest velocity. It means that shot-blasted processed is an effect way to prevent migration. Results also indicate that migration velocity decreased with decreasing volume or increasing viscosity of lubricants.
Keywords: Liquid lubricant Migration Surface texture Contact angle
论文图表:
引用
No.4716895899324148****
同行评议
共计0人参与
勘误表
液体润滑油热驱动蠕爬特性及表面形貌的影响
评论
全部评论0/1000