Degradable sealing grease for shield tail of tunnel shield tunneling machine and preparation method of sealing grease

The invention discloses degradable sealing grease for the shield tail of a tunnel shield tunneling machine. The sealing grease is prepared from components in percentage by mass as follows: 15%-30% of base oil, 20%-50% of auxiliary filler, 10%-25% of a tackifier, 10%-15% of lubricating grease, 3%-8% of fiber material and 1%-5% of water-absorbing particles. The sealing grease for the shield tail of the shield tunneling machine has good pumpability, oxidation resistance, outstanding sealing performance, excellent lubricating performance, degradability and adhesion and also has a good waterproof effect due to addition of crosslinked net-like water-absorbent particles in the grease. 本发明公开了种可降解型隧道盾构掘进机盾尾密封油脂，其由如下质量分数的组分构成：15％-30％的基础油、20％-50％的辅助填料、10％-25％的增粘剂、10％-15％的润滑脂、3％-8％的纤维材料、1％-5％吸水性颗粒。本发明所提供的种用于盾构机盾尾的密封油脂具有良好的泵送性、抗氧化性、优异的密封性、极好的润滑性、可降解性和粘附性，同时由于油脂中交联网状吸水颗粒的加入使得油脂具有良好的防水效果。