盾构机主驱动用丁腈橡胶密封材料的加工、力学及耐磨性能研究  

Processing,Mechanics and Wear Resistance Performance of Nitrile Rubber Sealing Material for Main Drive of Shield Machine

作　　者：张彩霞[1] 王廷梅[1] 陈守兵[1] 张新瑞[1] 王齐华[1] ZHANG Caixia;WANG Tingmei;CHEN Shoubing;ZHANG Xinrui;WANG Qihua(Lanzhou Institute of Chemical Physics,State Key Laboratory of Solid Lubrication,Chinese Academy of Sciences,Gansu Lanzhou 730000,China)

机构地区：[1]中国科学院兰州化学物理研究所固体润滑国家重点实验室,甘肃兰州730000

出　　处：《摩擦学学报(中英文)》2024年第12期1730-1738,共9页Tribology

基　　金：国家重点研发计划(2020YFB2006900);中国科学院稳定支持基础研究领域青年团队计划项目(YSBR-023)资助。

摘　　要：盾构机主驱动密封件是1种大型异形橡胶密封件,橡胶材料的加工性能在其精细结构成型过程中发挥着举足轻重的作用,而焦烧时间和门尼黏度是影响橡胶材料加工性能的关键因素.针对盾构机主驱动橡胶密封件的成型工艺对丁腈橡胶(NBR)加工性能的要求,本研究中以松明油、癸二酸二丁酯和固体古马隆树脂为原料,合成复合增塑剂;并使用高结构炭黑和低结构炭黑并用的补强体系,对NBR密封材料进行加工性能、物理机械性能和摩擦性能的宏观调控.结果表明:由于复合增塑剂中三组分的协同作用,当复合增塑体系中松明油的使用量为0.9 phr(parts per hundred parts of rubber,每百份橡胶中组份的重量份数)时,本研究中制备的高性能NBR密封材料,不仅满足大型盾构机用异形密封圈的成型工艺要求,混炼胶焦烧时间T_(10)可长达168.6 s,门尼黏度值M_(L(1+4))可低至46.95;还是1种兼具高强度、高韧性、高耐磨、高回复性与高耐热性的自润滑橡胶密封材料,且该材料的耐磨性能已在盾构机主驱动模拟试验台中进行了验证,可以满足盾构机主驱动系统对密封有效性和寿命的需求,本研究可以为大型盾构机主驱动密封材料的设计制备提供支撑.Nitrile Butadiene Rubber(NBR)has polar nitrile group(-CN)and trans-1,4 structure in the molecular structure,with excellent oil resistance,heat resistance and wear resistance,widely used in aerospace,petrochemical,engineering machinery,pharmaceutical and vehicle equipment hydraulic seal,pneumatic seal and mechanical seal auxiliary sealing device.The severe working conditions of the main drive seal of large Shield Tunneling Machine are matched with the performance of NBR,and the wear resistance of NBR plays a crucial role in its sealing performance,and even directly determines the working life of the whole machine.The main drive seal material of Shield Tunneling Machine is a large special-shaped rubber seal,and the processing performance of rubber material plays an important role in its forming process its fine structure.The scorch time and Mooney viscosity are the key factors affecting the processing properties of rubber materials.According to the processing requirement of NBR for the main drive rubber seal of Shield Tunneling Machine,in this study,the compound plasticize was synthesized from pine tar,dibutyl sebacate and solid coumarone resin.The reinforcement system formed by high structure carbon black and low structure carbon black was used to control the processing performance,physical and mechanical properties and friction properties of NBR sealing materials.In this paper,the effects of different contents of pine oil in composite plasticizer on the processability,physical and mechanical properties and frictional properties of NBR composites were systematically studied.The results showed that pine oil could reduce the softening point of solid gumarone resin,and could effectively improve the elongation at break of rubber materials and enhance the flexibility of rubber materials due to the synergistic action of three components in the composite plasticizer.When the amount of pine oil used in the composite plasticizing system was 0.9 phr(parts per hundred parts of rubber),and the amount of high structure carbon

关 键 词：丁腈橡胶 盾构机主驱动密封 焦烧时间 门尼黏度 密封材料 

分 类 号：TH117.1[机械工程—机械设计及理论]