One of the urgent problems that have yet to be addressed in the field of drilling engineering is how to further improve the working performance of rock bit journal bearings (RBJBs) and prolong its service life under complicated conditions of low speed, heavy load, and high temperature. Generally, reasonable surface texture parameters serve as an effective means for enhancing the lubrication and anti-wear performance of the sliding surface under harsh lubrication conditions. This study combines the geometric similarity with Sommerfeld similarity and designs an RBJBs scaling experiment; then, experimental studies are performed using an improved journal bearing test bench. The effects of nanosecond laser textured shape, geometric parameters, and angle factors on the tribological properties of RBJBs are discussed. The results indicate that cylindrical, elliptical, and chevron textures with appropriate parameters can significantly reduce the wear and improve the lubrication performance of RBJBs under the simulated testing conditions.

在钻探工程领域中尚未解决的紧迫问题之一是如何进一步改善岩石钻头轴颈轴承（RBJB）的工作性能并延长其在低速，重载和高转速的复杂条件下的使用寿命。温度。通常，合理的表面纹理参数是在恶劣的润滑条件下增强滑动表面的润滑和抗磨性能的有效手段。这项研究将几何相似度与Sommerfeld相似度相结合，并设计了一个RBJBs缩放实验。然后，使用改进的轴颈轴承测试台进行实验研究。讨论了纳秒激光织构形状，几何参数和角度因子对RBJB的摩擦学性能的影响。结果表明，