CN113088365A - 一种耐高温型盾尾密封油脂及其制备方法 - Google Patents
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Abstract
本发明公开了一种耐高温型盾尾密封油脂及其制备方法。主要是解决盾构机在掘进过程中盾尾密封油脂在高温下使用的问题,原理是在盾尾密封油脂中加入高温稳定剂,当盾构机在高温施工过程中,盾尾油脂仍能保持原有的稳定状态。一种耐高温型盾尾密封油脂是将质量分数为5%‑20%的基础油,4%‑10%的高温稳定剂,8%‑35%的增粘剂,1%‑3%乳化剂,0.5%‑1%的防腐剂,2%‑5%吸水材料,35%‑55%的粉状填充料,3.5%‑5.5%的结构成型剂,捏合均匀成耐高温型盾尾密封油脂。本发明制备的耐高温型盾尾密封油脂粘附性强、泵送性高、抗水压密封性好,在盾构机在高温掘进过程中,盾尾密封油脂仍能起到良好的密封润滑作用。
Description
技术领域
本发明属于工程技术领域,尤其涉及一种用于盾构机用的耐高温型盾尾密封油脂。
背景技术
近年来,各大城市为了缓解和改善交通紧张状况,积极发展地下轨道交通。截至2020 年 12 月 31 日,中国内地累计 45 座城市开通地铁为 6302.79 km。由国家发展改革委批复已获公示的新一轮城轨交通建设规划或建设规划调整方案中涉及新增规划线路长度总计 4001.74 km,新增计划投资额总计29781.91 亿元。轨道交通建设过程中盾构法施工得到广泛应用,在盾构施工过程中,盾尾密封油脂应用于盾构掘进机尾部密封装置中,起到润滑、防水密封、防蚀等作用,能够有效地隔绝地下水、泥浆和保护盾尾刷,是盾构施工过程中的关键材料,直接影响到施工的安全。盾尾油脂通过注脂泵注入,借助盾尾密封油脂的挤压力填充在盾构掘进过程中隧道衬砌与钢丝刷之间的运动间隙 ( 一般为 3 -4mm) 。盾尾密封润滑脂与钢板、钢丝刷、隧道管片粘接,并填充其间的空隙,与弹簧钢板、钢丝刷共同作用,形成一圈密封环;借助材料与钢板和管片的良好附着力,起到防水与润滑的双重作用保障盾构的顺利推进。在盾构掘进过程中,如果盾构运行温度较高,油脂不能保证良好的润滑和密封性能,只能依靠加大油脂泵送,停机降温,减慢注浆等措施,解决问题,这些措施的实施会影响工期,增加施工费用,严重时还会发生安全生产事故,所以研究及开发耐高温型盾尾密封油脂势在必行。
发明内容
本发明的目的在于提供一种具有优异的高温稳定性、蠕动性好、粘附性强、泵送性高、抗水压密封性好的耐高温型盾尾密封油脂及其制备方法,采用的方法是在盾尾密封油脂中加入加入高温稳定剂;加入高温稳定剂是一种聚脲基润滑脂,聚脲基润滑脂是采用独特的有机稠化剂,聚脲基脂有二脲、四脲、多脲基脂稠化剂,它不含有金属离子,不存在金属离子存在的对基础油催化不足的问题;因其独特晶体及胶体结构,拥有极强的附着能力和高温氧化安定性,对润滑脂的使用和贮藏有很大的影响;聚脲基脂具有很高的滴点,聚脲化合物是有机化合物,与油类有比较不错的亲和性, 聚脲基润滑脂有良好的抗水淋性能,聚脲润滑脂的良好的高温性能使盾尾油脂具有优异的高温稳定性。
本发明的目的是通过以下技术方案实现:
将质量分数为5%-20%的基础油,4%-10%的高温稳定剂,8%-35%的增粘剂,1%-3%乳化剂, 0.5%-1%的防腐剂,2%-5%吸水材料,35%-55%的粉状填充料,3.5%-5.5%的结构成型剂,捏合均匀成耐高温型盾尾密封油脂。
所述基础油为矿物油或合成油的一种或两种;所述高温稳定剂为聚脲基润滑脂;所述增粘剂为聚异丁烯、石油树脂、氢化苯乙烯双烯共聚物和乙烯丙烯共聚物的一种或几种;乳化剂为失水山梨醇单油酸酯、失水山梨醇二油酸酯和失水山梨醇三油酸酯的一种或几种;防腐剂为苯甲酸钠、山梨酸钾、叔丁基对羟基茴香醚和没食子酸丙酯中的一种或几种;吸水材料为钠基膨润土和聚丙烯酰胺中的一种或几种;粉状填充料为碳酸钙、云母粉、重晶石和滑石粉中的一种或几种;结构成型剂为植物纤维或动物纤维或两者混合后的混合纤维,长度为0.5-3.5mm。
由于上述技术方案的运用,本发明与现有技术相比具有下列优点:本发明一种耐高温型盾尾密封油脂及其制备方法,制备出的耐高温型盾尾密封油脂当盾构机在高温施工过程中,盾尾油脂仍能保持原有的稳定状态。该耐高温型盾尾密封油脂具有优异的高温稳定性、蠕动性好、粘附性强、泵送性高、抗水压密封性好。
具体实施方式
实施例1
将质量分数为12%的基础油,8%的高温稳定剂,22%的增粘剂,1%乳化剂,0.5%的防腐剂,2.5%吸水材料,50%的粉状填充料,4%的结构成型剂,均匀捏合。
其中基础油为150SN矿物油;高温稳定剂为聚脲基润滑脂;增粘剂为聚异丁烯和氢化苯乙烯双烯共聚物质量比1:1混合物;乳化剂为失水山梨醇单油酸酯;防腐剂为苯甲酸钠;吸水材料为钠基膨润土;粉状填充料为重晶石;结构成型剂为棉纤维,长度为0.5-3.5mm。
实施例2
将质量分数为14%的基础油,5%的高温稳定剂,21.5%的增粘剂,1.5%乳化剂,0.5%的防腐剂,3%吸水材料,50%的粉状填充料,4.5%的结构成型剂,均匀捏合。
其中基础油为68号环烷油,高温稳定剂为聚脲基润滑脂,增粘剂为聚异丁烯;乳化剂为失水山梨醇双油酸酯;防腐剂为叔丁基对羟基茴香醚;吸水材料为钠基膨润土;粉状填充料为碳酸钙;结构成型剂为棉纤维,长度为0.5-3.5mm。
实施例3
将质量分数为15%的基础油,10%的高温稳定剂,15.5%的增粘剂,1%乳化剂,1%的防腐剂,3.5%吸水材料,50%的粉状填充料,4%的结构成型剂,均匀捏合。
其中基础油为400SN矿物油;高温稳定剂为聚脲基润滑脂;增粘剂为聚异丁烯和乙烯丙烯共聚物质量比1:2混合物;乳化剂为失水山梨醇单油酸酯;防腐剂为叔丁基对羟基茴香醚;吸水材料为聚丙烯酰胺;粉状填充料为碳酸钙和重晶石质量比5:1;结构成型剂为竹纤维,长度为0.5-3.5mm。
实施例4
将质量分数为18%的基础油,5%的高温稳定剂,15.7%的增粘剂,2%乳化剂,0.8%的防腐剂,3.5%吸水材料,50%的粉状填充料,5%的结构成型剂,均匀捏合。
其中基础油为150SN矿物油;高温稳定剂为聚脲基润滑脂;增粘剂为聚异丁烯和石油树脂质量比3:1混合物;乳化剂为失水山梨醇单油酸酯;防腐剂为没食子酸丙酯;吸水材料为聚丙烯酰胺;粉状填充料为碳酸钙和重晶石质量比8:1;结构成型剂为棉纤维,长度为0.5-3.5mm。
对比例
将质量分数为15%的基础油, 25.7%的增粘剂,1.5%乳化剂,0.8%的防腐剂,3%吸水材料, 50%的粉状填充料, 4%的结构成型剂,均匀捏合。
其中基础油为150SN矿物油,增粘剂为聚异丁烯;乳化剂为失水山梨醇双油酸酯;防腐剂为没食子酸丙酯;吸水材料为聚丙烯酰胺;粉状填充料为碳酸钙;结构成型剂为棉纤维,长度为0.5-3.5mm。
将实施例1-4及对比例做常规测试,并做如下50℃锥入度、泵送性和抗水压密封性测试。
本发明实施例1-4产品质量检测指标如下:
表一 盾尾密封油脂性能测试比较
从表一中可以看出,本发明实施例1~4及对比例的锥入度、泵送性、爬行时间挥发性抗水压密封性均在盾尾密封油脂的使用区间,说明这些盾尾密封油脂均可在常规下使用,实施例1~4及对比例的油脂升温测试结果说明,本发明的盾尾密封油脂在升温到50℃后锥入度和泵送性变化幅度远小于对比例,而对比例的50℃抗水压密封性不合格,因此,本发明的盾尾密封油脂高温稳定性远优于对比例。
最后应说明的是:以上实例仅用于对本发明进行说明,并不构成对权利要求范围的限制,本领域内技术人员可以想到的其他实质上等同的替代,均在本发明保护范围内。本发明以权利要求书保护范围为准。
Claims (5)
1.一种耐高温型盾尾密封油脂,其特征在于:包括的组分及其质量分数为5%-20%的基础油,4%-10%的高温稳定剂,8%-35%的增粘剂,1%-3%乳化剂, 0.5%-1%的防腐剂,2%-5%吸水材料,35%-55%的粉状填充料,3.5%-5.5%的结构成型剂。
2.根据权利要求1所述的一种耐高温型盾尾密封油脂,其特征在于:所述基础油为矿物油或合成油的一种或两种。
3.根据权利要求1所述的一种耐高温型盾尾密封油脂,其特征在于:所述高温稳定剂为聚脲基润滑脂。
4.根据权利要求1所述的一种耐高温型盾尾密封油脂,其特征在于:所述增粘剂为聚异丁烯、石油树脂、氢化苯乙烯双烯共聚物和乙烯丙烯共聚物的一种或几种;乳化剂为失水山梨醇单油酸酯、失水山梨醇二油酸酯和失水山梨醇三油酸酯的一种或几种;防腐剂为苯甲酸钠、山梨酸钾、叔丁基对羟基茴香醚和没食子酸丙酯中的一种或几种;吸水材料为钠基膨润土和聚丙烯酰胺中的一种或几种;粉状填充料为碳酸钙、云母粉、重晶石和滑石粉中的一种或几种;结构成型剂为植物纤维或动物纤维或两者混合后的混合纤维,长度为0.5-3.5mm。
5.一种制备如权利要求1-4中任一权利要求所述的耐高温型盾尾密封油脂的方法,其特征在于,所述的方法包括如下步骤:将质量分数为5%-20%的基础油, 4%-10%的高温稳定剂, 8%-35%的增粘剂, 1%-3%乳化剂, 0.5%-1%的防腐剂,2%-5%吸水材料, 35%-55%的粉状填充料, 3.5%-5.5%的结构成型剂,均匀捏合。
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