水基纳米流体润滑对钢环摩擦副减摩抗磨性能的影响

Effect of Water Based Nanofluid Lubricating on Tribological Properties of Steel Ring Friction

采用聚乙二醇和羧甲基纤维素钠作为分散剂,将分散剂和纳米碳化硼颗粒以一定的质量分数加入水基础液中,通过两步法制备出稳定分散的水基纳米碳化硼流体。采用单一变量法,研究水基纳米碳化硼流体对钢环摩擦性能的影响,提出水基纳米碳化硼流体作为传动介质的抗磨减摩机理。结果表明,羧甲基纤维素钠作为分散剂且质量分数为0.3%、纳米颗粒粒径为80 nm且质量分数为0.8%、分散介质为去离子水时水基纳米碳化硼流体具有良好的抗磨减摩性能。当摩擦负载超过200 N之后,水基纳米碳化硼流体的抗磨减摩性能大为降低。

The stably dispersing water based nano B4C fluid is prepared by two-step process. The polyethylene glycol and sodium carboxymethyl cellulose are as the dispersing agent, and the dispersing agent and the nano boron carbide particles are added to the water based fluid in a certain mass fraction. The effects of the water based nano fluid on the steel ring friction properties are investigated by using the single variable method, the mechanism of the wear-resistance and anti-friction of water based nano B4C fluid as transmission media is proposed. The results show that under the optimal parameters of sodium carboxymethyl cellulose as a dispersing agent and with the mass fraction of 0.3% , 0.8% mass fraction of the nanoparticles, nanoparticles size 80 nm, deionized water as the dispersion medium, water based nano B4 C fluid is of excellent wear-resistance and anti-friction performance. When the friction load is out of 200 N, the wear-resistance and anti-friction properties of the water based nano B4 C fluid are greatly reduced.