Tang Jie, Zeng Jie, Lu Xin
School of Aeronautical Engineering, Civil Aviation University of China, Tianjin 300300, China.
Micromachines (Basel). 2022 Apr 30;13(5):722. doi: 10.3390/mi13050722.
The effect of the coupling texture on the friction and wear of a piston rod-rubber seal pair under lubricating conditions is studied in this paper. Crescentiform textures with different area densities were fabricated on high carbon chromium bearing steel (GCr15) and ethylene propylene diene monomer (EPDM) materials by using a laser marking machine. We compare and analyze the effects of untextured, single-textured, and coupling-textured surfaces on the friction characteristics of the piston rod-rubber seal pair by conducting tests on the reciprocating module of the UMT-2 friction and wear testing machine. The results showed that the coupling-textured surface had the lowest coefficient of friction and wear compared to the untextured and single-textured surfaces. When the normal load was 10 N under the optimal coupling texture area density (6.4%), the friction and wear of the sealing pair decreased the most. Compared with the untextured surface, the friction coefficient was reduced by 27.9% and the wear amount was reduced by 30.0%; compared with the single-textured surface, the friction coefficient was reduced by 18.9%, and the wear amount was reduced by 23.8%. The coupling effect generated by the coupling texture effectively enhanced the formation and stabilization of the oil lubricant film and effectively captured wear debris, preventing it from continuously scratching the surface and reducing wear and roughness.
本文研究了耦合纹理在润滑条件下对活塞杆 - 橡胶密封副摩擦磨损的影响。利用激光打标机在高碳铬轴承钢（GCr15）和三元乙丙橡胶（EPDM）材料上制备了不同面积密度的月牙形纹理。通过在UMT - 2摩擦磨损试验机的往复模块上进行试验，比较并分析了无纹理、单纹理和耦合纹理表面对活塞杆 - 橡胶密封副摩擦特性的影响。结果表明，与无纹理和单纹理表面相比，耦合纹理表面具有最低的摩擦系数和磨损量。在最佳耦合纹理面积密度（6.4%）下，当法向载荷为10 N时，密封副的摩擦磨损降低最为明显。与无纹理表面相比，摩擦系数降低了27.9%，磨损量降低了30.0%；与单纹理表面相比，摩擦系数降低了18.9%，磨损量降低了23.8%。耦合纹理产生的耦合效应有效地增强了油润滑膜的形成与稳定性，并有效地捕获磨损颗粒，防止其持续刮擦表面，从而减少磨损和粗糙度。
