Shield tunneling machine shield tail sealing grease and preparation method thereof

The invention discloses a shield tunneling machine shield tail sealing grease and a preparation method thereof. The sealing grease is prepared from, by mass, 20%-35% of base oil, 20%-40% of powdery filler, 15%-30% of fibrous materials, 8%-15% of thickener, 2%-8% of viscosity index improver, 0.5%-3% of mildew preventive, 0.3%-1.5% of ionic liquid and 1%-4% of graphene. According to the shield tunneling machine shield tail sealing grease and the preparation method thereof, by adding the ionic liquid and the graphene, the sealing performance and adhesivity of the sealing grease are improved, thewater washing resisting loss amount and water jet resistance of the sealing grease are remarkably improved, and the sealing grease has better sealing performance, and safe operation of a shield tunneling machine is guaranteed. 本发明公开了种盾构机盾尾密封油脂及其制备方法，该密封油脂包括以下质量百分比的组分：20-35％基础油，20-40％的粉状填料，15-30％的纤维材料，8-15％的增稠剂，2-8％的粘度指数改进剂，0.5-3％的防霉剂，0.3-1.5％的离子液体及1％-4％的石墨烯。本发明通过加入离子液体和石墨烯，提高了密封油脂的密封性和粘附性，还显著提高了密封油脂的抗水冲流失量和耐水喷射性，使其具有更好的密封