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将4种分别含有微米或纳米固体粒子的磨合油应用在45号钢齿轮副磨合试验中,研究这2类粒子对齿轮磨合的影响及行为.研究中使用的2种微米粒子分别是平均粒径为10μm的碳酸钙和100μm的石英砂,2种纳米粒子分别是平均粒径为5 nm的金刚石和30 nm的导电炭黑,大齿轮和小齿轮未磨合前的齿面三维粗糙度分别是24.00μm和32.97μm.试验结果表明:微米粒子对磨合磨损的主要影响表现为磨粒磨损,且微粒的粒径越大,磨粒磨损越剧烈;纳米粒子对磨合磨损影响不大,但纳米粒子能够吸附、填充和渗入齿面,从而改观齿面形貌和改善齿面摩擦学性能.另外,在含有这2类粒子的磨合磨损中,摩擦副间都有不同程度的“负电阻”现象发生,且两齿轮的磨损率差越大,该电现象越明显.
Four kinds of grinding oil containing micron or nano solid particles respectively were used in gear grinding test of No.45 steel to study the influence and behavior of these two kinds of particles on gear running in. The two kinds of micro-particles used in the study were average particle size 10μm calcium carbonate and 100μm quartz sand. The two kinds of nanoparticles are diamond with an average particle diameter of 5 nm and conductive carbon black with a diameter of 30 nm, respectively. The three-dimensional roughness of the tooth surfaces of the bull gear and the pinion before unbending is 24.00 μm and 32.97μm.The experimental results show that the main effect of the micro-particles on the wear-in wear is abrasive wear, and the larger the particle size, the more severe the abrasive wear; the nanoparticles have little effect on the wear-in wear, but the nano-particles can Adsorption, filling and infiltration of the tooth surface, so as to change the tooth surface morphology and improve the tribological properties of the tooth surface.In addition, with the wear of these two types of particles in the wear and tear, the friction pairs have varying degrees of “negative resistance” phenomenon Occurs, and the greater the wear rate difference between the two gears, the more obvious the phenomenon of electricity.