CN109135882A - 一种盾构机主轴承密封油脂及其制备方法 - Google Patents
一种盾构机主轴承密封油脂及其制备方法 Download PDFInfo
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Abstract
本发明公开了一种盾构机主轴承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:10‑20%的基础油、1‑5%的缓蚀剂、2‑6%的纤维材料、10‑20%的润滑脂、15‑24%的增粘剂、40‑50%的粉状填料、0.5‑3%的离子液体以及1‑4%的石墨烯。本发明通过加入离子液体及石墨烯,提高了密封油脂的抗磨性能和润滑性,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性。
Description
技术领域
本发明涉及一种密封油脂及其制备方法,特别是一种盾构机主轴承密封油脂及其制备方法。
背景技术
盾构机是指在软土和软岩地层中进行地下工程作业的工程机械,因其施工不受自然条件的影响,机械化、自动化程度高,所以广泛应用于地铁、铁路、公路、市政、水电等隧道工程。而盾构机主轴承是整个盾构机的核心部位,起支撑盾构刀盘的作用,其可靠性左右着盾构机施工的质量和安全性。盾构机在工作过程中,刀盘在泥沙、岩石、水、粉尘的环境下运行,同时,还承受着一定的土压或水压。为避免杂质进入主轴承和螺旋输送轴承而造成盾构机的损坏,必须使用盾构机主轴承密封油脂对主轴承进行密封。如果主轴承密封失效,施工过程中的泥沙等杂质将会与主轴承直接接触,影响主轴承的运行,增大盾构施工的风险,并影响施工的效果,更严重时会损坏主轴承,甚至直接造成盾构机停机。并且,由于外界条件限制,在地下对盾构机主轴承进行修复是十分困难的。这将额外增加施工难度,延长工期,增加成本,给施工企业带来巨大的损失。所以,盾构机的主轴承密封对盾构机的运行至关重要。因此,需要一种同时兼具良好的密封性、耐磨性和泵送性的主轴承密封油脂。
中国专利CN 102604725 A公开了一种盾构机主轴承专用密封脂,以该密封脂的总重量为基准,包含以下组分:35~50重量%的基础油、5~15重量%的增强剂、5~11重量%的增粘剂、5~10重量%的稠化剂、3~10重量%的固体润滑剂以及余量的填料,其还提供了一种所述密封脂的制备方法。
本发明所提供的盾构机主轴承密封油脂,具有更好的密封性和抗水冲性能,可以有效地防止杂质进入主轴承和螺旋输送轴承而造成盾构机的损坏,同时还具有良好的耐磨性能、抗乳化性以及可泵送性能。
发明内容
本发明的一个目的在于提供一种盾构机主轴承密封油脂,该密封油脂具有良好的密封性和抗水冲性能,可以有效地防止杂质进入主轴承和螺旋输送轴承而造成盾构机的损坏,同时还具有良好的耐磨性能、抗乳化性以及可泵送性能。
本发明的另一个目的在于提供一种上述盾构机主轴承密封油脂的制备方法。
本发明公开的盾构机主轴承密封油脂,包括以下质量百分比的组分:10-20%的基础油、2-6%的纤维材料、10-20%的润滑脂、15-24%的增粘剂、1-5%的缓蚀剂、0.5-3%离子液体,40-50%为粉状填料。
本发明中加入了离子液体,在现有技术中,离子液体多用于润滑油中,在其中所起的作用一般为改善润滑油摩擦性能,改善极压抗磨性能,同时提供好的热安定性和防腐性能等。离子液体虽然在密封油脂中有使用,但均是作为防腐剂的组分,起到防腐作用。本发明中,离子液体加入之后,能够提高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性。这个作用目前并未披露。
优选的,基础油为植物油中的一种或多种,植物油包括蓖麻油、玉米油、花生油、大豆油。
优选的,缓蚀剂为咪唑啉类、亚磷酸芳香脂、磷酸三烷基酯、巯基三嗪化合物、脂肪酸氨基酰胺、磺化烷基酚中的一种或几种。其中,巯基三嗪化合物优选为2,4,6-三巯基-1,3,5-三嗪。
优选的,纤维材料为植物纤维和矿物纤维中的一种或多种。该植物纤维包括棉纤维、亚麻纤维、竹纤维。矿物纤维包括海泡石纤维、水镁石纤维。
优选的,纤维材料长度为0-5mm。
优选的,润滑脂为锂基脂、钛基脂、牛脂、复合磺酸钙基润滑脂中的一种或几种。
优选的,增粘剂为聚异丁烯、聚丙烯醇、聚丙烯酰胺、乙烯丙烯共聚物、聚正丁基乙烯基醚中的一种或几种。
优选的,粉状填料为碳酸钙、硫酸镁、膨润土、云母粉、滑石粉、高岭土中的一种或几种。
更优的,该粉状填料粒度为200-2000目。
优选的,离子液体为1-辛基-3-甲基咪唑四氟硼酸盐,1-辛基-3-甲基咪唑六氟磷酸盐,1-癸基-3-甲基咪唑四氟硼酸盐,1-癸基-3-甲基咪唑六氟磷酸盐中的一种或多种。
优选的,本发明中加入了石墨烯,石墨烯是一种新型二维平面纳米材料,具有与石墨完全不同的空间结构,其特殊的单原子层结构决定了它具有丰富而新奇的物理性质,石墨烯是世界上最薄的二维材料,其厚度仅为0.35nm。这种特殊结构蕴含了丰富而新奇的物理现象,如杨氏模量、热导率、载流子迁移率以及比表面积等均比较高,还具有分数量子霍尔效应、量子霍尔铁磁性和激子带隙等现象。这些优异的性能和独特的纳米结构,使石墨烯成为近年来广泛关注的焦点。
本发明中石墨烯的加入,与传统的添加石墨相比,不仅提高了密封油脂的抗磨性能和润滑性,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性。
本发明还公开一种制备该密封油脂的方法,包括如下步骤:将质量分数为0.5-3%的离子液体加入10-20%的基础油中,常温下搅拌0.5-1h;然后加入10-20%的润滑脂、1-5%的缓蚀剂、15-24%的增粘剂,搅拌2-3h;然后加入2-6%的纤维材料,搅拌2-3h,再加入40-50%的粉状填料,继续搅拌1-2h。
与现有盾构机主轴承密封油脂相比,采用本发明的配方制备的盾构机主轴承密封油脂具有较好的密封性、抗乳化性和耐磨性:
(1)耐磨性优异,在ASTM D4172标准下的磨斑直径最小为0.48mm;
(2)密封油脂的抗水冲流失量和耐水喷射性得到提高,密封油脂具有更好的密封性。
具体实施方式
下面结合实施例对本发明的具体实施方式作进一步说明:
实施例1
一种盾构机主轴承密封油脂,其组分及其质量百分比如下:
制备方法:按上述质量百分比,将1-辛基-3-甲基咪唑四氟硼酸盐加入蓖麻油中,常温下搅拌0.5h;然后加入3号通用锂基脂、聚异丁烯、咪唑啉,搅拌2h,然后加入棉纤维材料,搅拌2h,再加入轻质碳酸钙,继续搅拌1h即可。
实施例2
一种盾构机主轴承密封油脂,其组分及其质量百分比如下:
制备方法:按上述质量百分比,将1-辛基-3-甲基咪唑六氟磷酸盐加入花生油中,常温下搅拌1h;然后加入牛脂、聚异丁烯、聚丙烯酰胺、磷酸三烷基酯,搅拌2.5h,然后加入竹纤维材料,搅拌2.5h,再加入膨润土,继续搅拌1.5h即可。
实施例3
一种盾构机主轴承密封油脂,其组分及其质量百分比如下:
制备方法:按上述质量百分比,将1-癸基-3-甲基咪唑四氟硼酸盐加入大豆油中,常温下搅拌1h;然后加入钛基脂、复合磺酸钙基润滑脂、乙烯丙烯共聚物、2,4,6-三巯基-1,3,5-三嗪,搅拌3h,然后加入海泡石纤维,搅拌3h,再加入滑石粉,继续搅拌2h即可。
实施例4
一种盾构机主轴承密封油脂,其组分及其质量百分比如下:
制备方法:按上述质量百分比,将1-癸基-3-甲基咪唑六氟磷酸盐加入玉米油中,常温下搅拌0.5h;然后加入玉米油、复合磺酸钙基润滑脂、聚丙烯醇、聚正丁基乙烯基醚、脂肪酸氨基酰胺,搅拌2h,然后加入水镁石纤维材料,搅拌2h,再加入高岭土,继续搅拌2h即可。
实施例5
一种盾构机主轴承密封油脂,其组分及其质量百分比如下:
制备方法:按上述质量百分比,将1-辛基-3-甲基咪唑六氟磷酸盐加入玉米油和花生油中,常温下搅拌0.5h;搅拌1.5h,然后加入钛基脂、聚异丁烯、亚磷酸芳香脂、磺化烷基酚,搅拌2.5h,然后加入亚麻纤维,搅拌2.5h,再加入硫酸镁,继续搅拌1.5h即可。
实施例6
一种盾构机主轴承密封油脂,其组分及其质量百分比如下:
制备方法:按上述质量百分比,将1-癸基-3-甲基咪唑四氟硼酸盐加入蓖麻油中,常温下搅拌1h;然后加入钛基脂、聚异丁烯、磺化烷基酚,搅拌2.5h,然后加入亚麻纤维和竹纤维,搅拌2.5h,再加入云母粉和高岭土,继续搅拌1.5h即可。
实施例7
一种盾构机主轴承密封油脂,其组分及其质量百分比如下:
制备方法:按上述质量百分比,将离子液体粉体加入花生油中,常温下搅拌1h;然后加入牛脂、聚异丁烯、磺化烷基酚,搅拌2.5h,然后加入竹纤维,搅拌2.5h,再加入云母粉,继续搅拌1.5h即可。
实施例8
一种盾构机主轴承密封油脂,其组分及其质量百分比如下:
制备方法:按上述质量百分比,将1-辛基-3-甲基咪唑四氟硼酸盐、石墨烯粉体加入蓖麻油中,常温下搅拌0.5h;然后加入3号通用锂基脂、聚异丁烯、咪唑啉,搅拌2h,然后加入棉纤维材料,搅拌2h,再加入轻质碳酸钙,继续搅拌1h即可。
对比例1
本实施例中各组分及其含量与实施例3一致,其不同在于没有加入离子液体。
其制备方法也与实施例3一致:按实施例3的用量,将大豆油在常温下搅拌1h;然后加入钛基脂、复合磺酸钙基润滑脂、乙烯丙烯共聚物、2,4,6-三巯基-1,3,5-三嗪,搅拌3h,然后加入海泡石纤维,搅拌3h,再加入滑石粉,继续搅拌2h即可。
本发明的密封油脂的各项指标如下:
表1
从表1可以看出,本发明实施例1-3都表现除了优异的抗水冲性(水冲流失量和耐水喷射性的测试)、泵送性、耐磨性和密封性,并且由于缓蚀剂的加入,在腐蚀测试和轴承腐蚀测试中也都表现优异。
实施例1-3都添加了离子液体,对比例1中各组分及其含量与实施例3一致,其不同仅在于未添加离子液体。根据表1可以看出添加了离子液体的实施例1-3中,水冲流失量及耐水喷射性远远优于未添加离子液体的对比例1,说明离子液体的加入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性。
对比例2及对比例3
对比例2中各组分及其含量与实施例8一致,其不同在于加入的是石墨粉体。
对比例3中各组分及其含量与实施例8一致,其不同在于不加入石墨烯。
对比例2、3制备方法也与实施例8一致:按实施例8的用量,将1-辛基-3-甲基咪唑四氟硼酸盐、石墨粉体(对比例3此处只添加1-辛基-3-甲基咪唑四氟硼酸盐)加入蓖麻油中,常温下搅拌0.5h;然后加入3号通用锂基脂、聚异丁烯、咪唑啉,搅拌2h,然后加入棉纤维材料,搅拌2h,再加入轻质碳酸钙,继续搅拌1h即可。
本发明的密封油脂的各项指标如下:
表2
从表2可以看出,本发明实施例8表现除了优异的抗水冲性(水冲流失量和耐水喷射性的测试)、泵送性、耐磨性和密封性,并且由于缓蚀剂的加入,在腐蚀测试和轴承腐蚀测试中也都表现优异。
实施例8添加了石墨烯,对比例2中各组分及其含量与实施例8一致,其不同仅在于添加的为石墨粉末。根据表2,可以看出添加了石墨烯的实施例8中,磨斑直径为0.48mm,而添加石墨的对比例1中,磨斑直径为0.60mm,说明石墨烯粉体的加入提高了密封油脂的耐磨性。
实施例8添加了石墨烯,对比例3中各组分及其含量与实施例8一致,其不同仅在于不添加石墨。根据表2,可以看出添加了石墨烯的实施例8中,磨斑直径为0.48mm,而不添加石墨的对比例3中,磨斑直径为0.67mm,说明石墨烯粉体的加入提高了密封油脂的耐磨性。
本发明的盾构机一般是在含有泥沙、水、粉尘等环境下工作,如果施工过程中的水等杂质进入主轴承,直接与主轴承接触,将会影响主轴承的正常运行,更严重时会损坏主轴承。从水冲流失量和耐水喷射性试验中可以看出,实施例的密封油脂在水冲刷(ASTMD1264)和水喷雾(ASTM D4049)试验中均取得了出色效果,证明密封油脂即使在有压力水喷雾时也能附着在主轴承上,从而起到良好的密封效果。
根据上述说明书的揭示和教导,本发明所属领域的技术人员还可以对上述实施方式进行变更和修改。因此,本发明并不局限于上面揭示和描述的具体实施方式,对发明的一些修改和变更也应当落入本发明的权利要求的保护范围内。此外,尽管本说明书中使用了一些特定的术语,但这些术语只是为了方便说明,并不对本发明构成任何限制。
Claims (10)
1.一种盾构机主轴承密封油脂,其特征在于:所述密封油脂包括以下质量百分比的组分:10-20%的基础油、1-5%的缓蚀剂、2-6%的纤维材料、10-20%的润滑脂、15-24%的增粘剂、40-50%的粉状填料、0.5-3%的离子液体。
2.根据权利要求1所述的盾构机主轴承密封油脂,其特征在于:所述离子液体为1-辛基-3-甲基咪唑四氟硼酸盐,1-辛基-3-甲基咪唑六氟磷酸盐,1-癸基-3-甲基咪唑四氟硼酸盐,1-癸基-3-甲基咪唑六氟磷酸盐中的一种或多种。
3.根据权利要求1所述的盾构机主轴承密封油脂,其特征在于:所述纤维材料为植物纤维和矿物纤维中的一种或多种。
4.根据权利要求3所述的盾构机主轴承密封油脂,其特征在于:所述纤维材料长度为0-5mm。
5.根据权利要求1所述的盾构机主轴承密封油脂,其特征在于:所述润滑脂为锂基脂、钛基脂、牛脂、复合磺酸钙基润滑脂中的一种或几种。
6.根据权利要求1所述的盾构机主轴承密封油脂,其特征在于:所述增粘剂为聚异丁烯、聚丙烯醇、聚丙烯酰胺、乙烯丙烯共聚物、聚正丁基乙烯基醚中的一种或几种。
7.根据权利要求1所述的盾构机主轴承密封油脂,其特征在于:所述缓蚀剂为咪唑啉类、亚磷酸芳香脂、磷酸三烷基酯、磺化烷基酚中的一种或几种。
8.根据权利要求1所述的盾构机主轴承密封油脂,其特征在于:所述密封油脂还包括石墨烯,石墨烯的含量为:1.0-4.0%。
9.一种制备权利要求1-8任一项所述密封油脂的方法,其特征在于,所述方法包括如下步骤:将质量分数为0.5-3%的离子液体加入10-20%的基础油中,常温下搅拌0.5-1h;然后加入10-20%的润滑脂、1-5%的缓蚀剂、15~24%的增粘剂,搅拌2-3h,然后加入2-6%的纤维材料,搅拌2-3h,再加入40-50%的粉状填料,继续搅拌1-2h。
10.根据权利要求9所述的制备密封油脂的方法,其特征在于,所述方法包括如下步骤:在加入离子液体时,同时加入质量分数为1.0-4.0%的石墨烯。
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CN112903807B (zh) * | 2021-01-22 | 2023-10-20 | 辽宁工程技术大学 | 一种利用霍尔效应测含水软土载流子浓度的仪器及方法 |
CN116004306A (zh) * | 2022-12-20 | 2023-04-25 | 中铁建华南建设(广州)高科技产业有限公司 | 盾构机主轴承密封油脂及其制备方法 |
CN116004306B (zh) * | 2022-12-20 | 2023-08-18 | 中铁建华南建设(广州)高科技产业有限公司 | 盾构机主轴承密封油脂及其制备方法 |
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