椭圆凹坑布置对钻头滑动轴承减磨性能的影响

Effect of Elliptical Pit Arrangement on Abrasion Reduction Performance of Sliding Bearing

利用纳秒激光打标机在钻头滑动轴承销-盘单元试样表面加工椭圆凹坑织构,其长轴为600μm,深度20μm保持不变,短轴200~500μm范围。采用MDW-1型立式万能摩擦磨损试验机的销-盘摩擦副开展试验载荷为435 N、速度为0.29 m/s模拟工况下的牙轮钻头滑动轴承单元摩擦学试验,研究椭圆凹坑织构分别加工于滑动轴承轴径和轴套表面时对钻头滑动轴承摩擦学性能的影响。结果表明:椭圆凹坑同时交错分布于销、盘试样表面的润滑减磨效果最优,椭圆凹坑同时平行分布于销、盘试样表面的润滑减磨效果最差。

Elliptic texture with the major semi-axis is 600μm,the depth 20μm remains unchanged,and the minor semi-axis is 200-500μm was corroded with the nanosecond laser marking machine on the surface of Pin-disk element specimens.The influence of the surface texture on the friction properties of bit sliding bearing when machined on shaft diameter and sleeve surface respectively were investigated under the simulated condition with the test force is 435 N and the speed is 0.29 m/s with the MDW-1 type testing machine.The experimental results show that the lubrication and wear reduction performance is optimal when the texture is staggered on the surface of the pin and the disc sample,while the lubrication effect is the worst when the texture is parallel distributed on the surface of the pin and the disk sample.