影响复合锂基润滑脂性能的因素探讨

STUDY ON THE FACTORS INFLUENCING THE PERFORMANCE OF LITHIUM COMPLEX GREASE

探讨了复合锂基润滑脂的组成、工艺和添加剂对复合锂基润滑脂性能的影响。结果表明:复合锂基润滑脂的制备宜采用黏度较大的基础油;最高炼制温度为230～240℃,冷却方式为慢冷方式;聚异丁烯可改善复合锂基润滑脂的抗水性,LaF_3和三聚氰胺氰脲酸络合物可提高复合锂基润滑脂的抗磨性,硫代氨基甲酸盐可提高润滑脂的抗磨极压性。采用优化配方和工艺制备的复合锂基润滑脂具有高滴点,并具有良好的胶体安定性、机械安定性、氧化安定性、防腐性、抗水性和润滑性。

Lithium complex grease is a kind of multifunction grease. The effect of compositions, process conditions and additives on the performance of lithium complex grease is discussed in this paper. Results show that high viscosity base oil is preferred for preparing the grease; the maximum preparation temperature should be in the range of 230- 240 ℃ and slowly cooling mode is recommended. The functions of additives on the grease are as follows：poly-isobutene for improving water resistance property, I.aF3and MCA for improving anti-wear property and dithiocarbamate for enhancing anti-wear and EP property. Lithium complex grease prepared by the optimized formula and process conditions possesses high dropping point, superior colloidal stability, shear stability and oxidation stability, as well as good anti-corrosion, water resistance and lubricating properties.