磁流变液环境下密封副非线性磨损行为研究

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中图分类号：TH117DOI：10.3969/j.issn.1004-132X.2025.09.008 开放科学（资源服务）标识码（OSID）：

ResearchonNonlinearWearBehaviorofSealingPairsin Magnetorheological Fluid Environment

LI Shanshan1 SUN Xingweil*YANG Heng²QIAO Heting1 1.School of Mechanical Engineering，Shenyang University of Technology， Shenyang，110870 2.School of Information Science and Engineering， Shenyang University of Technology， Shenyang，110870

Abstract：To investigate the effects of tribodynamics behavior in MRF on the wear mechanism of seal ing pairs，the dynamic sealing wear model was established considering coupling efects of surface roughness and iron particles，with ANSYS employed for microscopic contact mechanics simulation.Additionally，the friction and wear performance of piston rods with diferent surface roughnesses in two media was evaluated by self-developed reciprocating dynamic seal wear test device.The results demonstrate that the instantaneous contact between rough texture and iron particles in sealing interfaces alleviates fatigue cracks on O-ring surfaces under alternating shearing actions of asperities，and help to avoid the micro-cutting effects of iron particles on the surface piston rods. As a result，the sealing pairs exhibit good tribological perfor mance in MRF environment. However，iron particles situated between polished sample and O-ring are continuously subjected to the transverse shear forces and longitudinal extrusion pressures by micro-texture. Consequently，numerous iron particles are forced to embed in the O-rings，and obvious furrow-like wear marks are produced on the surfaces of reciprocating piston rods，causing premature sealing failure due to the two-body abrasive wear.

Key words：magnetorheological fluid（MRF）；surface roughness；wear characteristics；tribodynamics behavior；abrasive wear

0 引言

磁流变液（magnetorheological fluid，MRF）因具有表观黏度随磁场实时变化的流变特性被广泛应用于阻尼控制、柔性驱动等领域以提供精确阻尼及运动控制[1。（剩余18568字）