【摘要】 利用自行设计的润滑剂弹流拖动力试验台,模拟轴承实际工况对一种复合磺酸钙基脂进行拖动力测试以及拖动曲线的分析,利用传统的Teaarwerk-Jonson(T-J)弹塑性模型和一种四参数指数模型对试验数据进行拟合和回归分析,讨论适用于该复合磺酸钙基脂的拖动特性预测模型。结果表明:该润滑脂在中低速、重轻载下具有优良的润滑特性,其拖动系数随载荷的增大而变大,随滚动速度的增大而减小,拖动曲线的线性区斜率在高速时基本一致;在工况载荷较大时,T-J模型拟合结果存在较大误差,说明其不适合拟合存在明显热效应的拖动曲线;四参数指数模型对整体实验数据的拟合精度较高,可以用来研究这种润滑脂的拖动特性。更多还原

【Abstract】 The traction behavior of a calcium sulfonate complex grease was tested on a self-made test-bed by simulating the actual working conditions of the bearing,and the traction curves of the complex grease were analyzed. The fitting and regression analysis of the experimental data were carried out by using the Teaarwerk-Jonson( T-J) elastic-plastic model and a four parameter exponential model,and the prediction model for the drag characteristics of this complex grease was discussed. The results indicate that this complex grease has excellent lubricating at medium and low speed,heavy and light load,its drag coefficient is increased with the increase of load and decreased with the increase of rolling speed,the slope in the linear region of the drag curve is almost the same at high speed. When the working load is large,there is a big error in the fitting result of T-J model,indicating that the T-J model is not suitable to fit the drag curves with obvious thermal effect. The four parameter exponential model has higher fitting accuracy to the overall experimental data,which can be used to study the drag characteristics of this complex grease.更多还原