摘要
为了研究织构对牙轮钻头滑动轴承的润滑减磨机理及织构面积比、织构直径和织构深度对轴承摩擦学性能的影响规律,采用MMW-1型微机控制立式万能摩擦磨损试验机和销-盘摩擦副,开展了模拟工况下织构化牙轮钻头滑动轴承单元摩擦学试验。研究结果表明:合理参数织构能有效提高牙轮钻头滑动轴承的润滑及摩擦学性能;对于较小直径(200μm)织构,当织构面积比为10%或15%时织构的润滑性能更好,而对于较大直径(300～600μm)织构,当织构面积比为5%时织构的润滑性能更优,因此小直径织构面积比偏大较好,可确保润滑介质分布更均匀,而大直径织构则织构面积比偏小更好;相同条件下,织构化牙轮钻头滑动轴承表面织构深度为40μm时织构的润滑性能最好,织构深度较深或较浅均不利于提高织构的润滑减磨性能。研究结果可为合理选择牙轮钻头滑动轴承织构参数、促进表面织构技术在牙轮钻头滑动轴承上的应用打下试验基础。
To study the influence of texture on the lubrication and wear reduction mechanism of the sliding bearing of the roller cone bit, and to understand the influence of the texture area ratio, the texture diameter and the texture depth on the tribological properties of the sliding bearing, the MMW-1 type microcomputer controlled vertical universal friction wear tester and the pin-disk friction pair were used to carry out the tribological test of the textured roller cone bit sliding bearing unit under simulated conditions. The results show that reasonable parameter texture can effectively improve the lubrication and tribological properties of the sliding bearing of the roller cone bit.For the smaller diameter(200 μm) texture, the texture could provide a better lubricity when the texture area ratio is 10% or 15%. For larger diameter(300~600 μm) texture, the texture could provide a better lubricity when the texture area ratio is 5%. Therefore, larger area ratio is preferable as for small-diameter texture, which ensures a more uniform distribution of the lubricating medium;while smaller texture area ratio is preferable for large-diameter texture.Under the same conditions, the best lubricity could be attained when the texture depth is 40 μm, and the deeper or shallower texture depth is not preferable to improving the lubrication and anti-wear performance of the texture. The study can lay a test foundation for selection of the texture parameters of the sliding bearing of the roller cone bit and promoting the application of the surface texture technology on the sliding bearing of the roller cone bit.
作者
廖文玲
Liao Wenling(School of Mechanical Engineering, Chengdu Technological University)
出处
《石油机械》
北大核心
2019年第4期12-18,23,共8页
China Petroleum Machinery
基金
国家自然科学基金面上项目"油气装备摩擦副仿生表面织构抗磨减阻机理与设计理论研究"(51775463)
关键词
牙轮钻头
滑动轴承
表面织构
摩擦磨损
织构参数
摩擦学性能
roller cone bit
sliding bearing
surface texture
frictional wear
texture parameters
tribological property
