CN111303967A - 一种可生物降解的主轴承密封脂 - Google Patents
一种可生物降解的主轴承密封脂 Download PDFInfo
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Abstract
本发明公开了一种可生物降解的主轴承密封脂，其各组分的重量百分比为油酸甲酯38.6～47.0％、聚α烯烃21.5～28.0％、十二羟基硬脂酸4.5～7.5％、硬脂酸1.5～2.6％、氢氧化锂0.5～1.1％、氢氧化钙0.1～0.3％、氰尿酸三聚氰胺盐2.5～3.5％、二苯胺0.4～0.6％、石油磺酸钡0.9～1.2％、硫化异丁烯1.3～1.8％、木质纤维素2.9～3.8％、聚异丁烯链段共聚物4.7～9.7％、轻质碳酸钙4.5～8.5％，该可生物降解的主轴承密封脂保证城市地下隧道盾构机作业对主轴承润滑密封的需要，保证城市地下水资源不受污染，也可以替代进口产品，应用于江、河、湖地下隧道盾构机作业对主轴承密封脂的性能要求。
Description
技术领域
本发明涉及润滑密封材料技术领域，具体为一种可生物降解的盾构机主轴承密封脂。
背景技术
盾构技术是目前国际上发达国家较为广泛采用的地下隧道全机械化开挖施工技术，盾构技术运用的关键是使用了盾构机。盾构机是盾构法施工中的最主要施工机械。主轴承密封脂是盾构法施工中隧道盾构掘进带动切削驱动装置、动力运转来源的主轴承润滑密封主材料。防止轴封滑动面磨损，防止土、砂、地下水、添加剂等进入。经受得住压力舱内的泥土压、地下水压、泥浆压、添加剂注浆压和压力压等压力，要求有很好的润滑、密封作用。
目前国内市场上普遍使用的（国产）主轴承密封脂，皆是由矿物油生产的润滑脂（不可生物降解），污染城市地下用水（180公斤矿物油可污染45平方公里地下水）。
发明内容
本发明要解决的技术问题是克服现有的缺陷，提供一种生物可降解，润滑密封性能好的主轴承密封脂。满足盾构机在城市、江、河、湖地下掘进工作的需要，不污染地下水资源、有效地解决背景技术中的问题。
为实现上述目的，本发明提出：一种可生物降解的主轴承密封脂。所述可生物降解的主轴承密封脂中各组分的重量百分比如下：油酸甲酯38.6～47.0％、聚α烯烃21.5～28.0％、十二羟基硬脂酸4.5～7.5％、硬脂酸1.5～2.6％、氢氧化锂0.5～1.1％、氢氧化钙0.1～0.3％、氰尿酸三聚氰胺盐2.5～3.5％、二苯胺0.4～0.6％、石油磺酸钡0.9～1.2％、硫化异丁烯1.3～1.8％、木质纤维素2.9～3.8％、聚异丁烯链段共聚物4.7～9.7％、轻质碳酸钙4.5～8.5％。
本发明还提供一种可生物降解的主轴承密封脂的制备方法，包括以下步骤：
S1）：启动搅拌，将油酸甲酯、聚α烯烃的各1/3投入，启动升温装置70.0～90.0℃保持5min，将十二羟基硬脂酸、硬脂酸，氢氧化锂、氢氧化钙投入反应釜，升温100.0～120.0℃反应1h。反应后升温到150.0～170.0℃，投入蓖麻油甲酯、聚α烯烃的另1/3，且升温到190.0～210.0℃。
S2）：转入调合釜，过程中投入最后的1/3油酸甲酯、聚α烯烃。搅拌降温过程中投入氰尿酸三聚氰胺盐、二苯胺、石油磺酸钡、硫化异丁烯、木质纤维素，降温到100.0～120.0℃，实施剪切，泵压>1Mpa，运行20min，取样测25.0℃±1.0℃锥入度（中控），后加入聚异丁烯链段共聚物、轻质碳酸钙（在剪切状态下）20min时取样测锥入度，在符合要求的情况下，经脱气入包装，得到成品。
作为本发明的一种优选技术方案：所述的可生物降解是排除了全部矿物油，选用了油酸甲酯、合成油聚α烯烃、植物纤维素、聚异丁烯链段共聚物、轻质碳酸钙。对保护地下水资源起到了关键。
与现有技术相比，本发明的有益效果是：
1、本发明利用氢氧化锂、氢氧化钙与十二羟基硬脂酸、硬脂酸反应后生成的混合皂基与油酸甲酯、聚α烯烃（二者配伍性好）有非常好的亲和力，皂分散体系有极好的润滑性、耐压性、抗水淋性、氧化安定性。皂体系的性能可满足与其他原料的配伍要求，使最终产品在盾构机主轴承运行时完成润滑、密封、抗水淋和生物降解的需要。
2、氰尿酸三聚氰胺盐是一种有机固体润滑载荷填充剂，憎水，与硫化异丁烯抗磨剂复合使用，可承载重负荷运转部位的润滑需要，增加密封性。
3、二苯胺，用量少，抗氧化性好，与石油磺酸钡防锈剂协和使用，可产生好的抗氧、抗锈蚀，有效地延长产品的使用寿命，起到长效的效果。
4、天然可降解的木质纤维素，在主轴承密封脂中各种原料混合以后起到好的骨架作用，抗剪切、增稠，提高密封性能、抗水淋。
5、聚异丁烯链段共聚物生物降解，使整体结构的结合强度提高，对金属的粘附力增加，润滑性、抗水性提高。
6、轻质碳酸钙：无毒、生物降解、分散性好、补强、骨架稳定，可提高撕裂强度，提高受压承载力、密封性。
7、可生物降解的锂钙基脂，在极压剂、粘附剂、抗氧剂、固体润滑填充剂、抗剪切天然木质纤维素等的促和作用下，有了适中的稠度（锥入度25.0℃±1.0℃、0.1mm、220～240）有非常好的润滑性、极压抗磨性、粘附性、密封性、抗水性、生物降解，目前国内尚未见。
保证城市地下隧道盾构机作业对主轴承润滑密封的需要，保证城市地下水资源不受污染，也可以替代进口产品，应用于江、河、湖地下隧道盾构机作业对主轴承密封脂的性能要求。
具体实施方式
为使本发明的目的、技术方案及优点更加清楚明白，以下结合具体实施例，对本发明进一步详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本发明，并不用于限定本发明。
实施例一：
一种可生物降解的主轴承密封脂，其各组分的重量百分比如下：油酸甲酯47.0％、聚α烯烃21.5％、十二羟基硬脂酸4.5％、硬脂酸2.6％、氢氧化锂1.0％、氢氧化钙0.2％、氰尿酸三聚氰胺盐2.7％、二苯胺0.5％、石油磺酸钡1.1％、硫化异丁烯1.5％、木质纤维素3.2％、聚异丁烯链段共聚物9.7％、轻质碳酸钙4.5％。其中蓖麻油甲酯、聚α烯烃做为稀释剂；十二羟基硬脂酸、硬脂酸做为稠化剂；氢氧化锂、氢氧化钙做为皂化剂；氰尿酸三聚氰胺盐为极压剂；二苯胺为抗氧剂；石油磺酸钡为防锈剂；木质纤维素为膨松剂；聚异丁烯链段共聚物为增粘剂；轻质碳酸钙为润滑填充剂。
本发明还提供一种可生物降解的主轴承密封脂的制备方法，包括以下步骤：
S1）：启动搅拌，将油酸甲酯、聚α烯烃的各1/3投入，启动升温装置70℃保持5min，将十二羟基硬脂酸、硬脂酸，氢氧化锂、氢氧化钙投入反应釜，升温100℃，反应1h。反应后升温到150℃，投入蓖麻油甲酯、聚α烯烃的另1/3，且升温到190℃。
S2）：转入调合釜，过程中投入最后的1/3油酸甲酯、聚α烯烃。搅拌降温过程中投入氰尿酸三聚氰胺盐、二苯胺、石油磺酸钡、硫化异丁烯、木质纤维素，降温到100℃，实施剪切，泵压>1Mpa，运行20min，取样测25.0℃±1.0℃锥入度（中控）。后加入聚异丁烯链段共聚物、轻质碳酸钙（在剪切状态下）20min时取样测锥入度，在符合要求的情况下，经脱气入包装，得到成品。
所得成品的技术参数：锥入度（25℃±1℃、0.1mm）220，磨斑直径MMASTMD 22960.8，水封性（35bara 25℃）修改MATSUMURA方法 无水，泵送性（25℃ 10bars g/min ASTMD）45，生物降解（CECL-33-93）87%。
实施例二：
一种可生物降解的主轴承密封脂，其各组分的重量百分比如下：油酸甲酯38.6％、聚α烯烃28％、十二羟基硬脂酸7.5％、硬脂酸2.0％、氢氧化锂0.5％、氢氧化钙0.3％、氰尿酸三聚氰胺盐2.5％、二苯胺0.6％、石油磺酸钡0.9％、硫化异丁烯1.3％、木质纤维素3.8％、聚异丁烯链段共聚物7.0％、轻质碳酸钙7％。
本发明还提供一种可生物降解的主轴承密封脂的制备方法，包括以下步骤：
S1）：启动搅拌，将油酸甲酯、聚α烯烃的各1/3投入，启动升温装置80℃保持5min，将十二羟基硬脂酸、硬脂酸，氢氧化锂、氢氧化钙投入反应釜，升温110℃，反应1h。反应后升温到160℃，投入蓖麻油甲酯、聚α烯烃的另1/3，且升温到200℃。
S2）：转入调合釜，过程中投入最后的1/3油酸甲酯、聚α烯烃。搅拌降温过程中投入氰尿酸三聚氰胺盐、二苯胺、石油磺酸钡、硫化异丁烯、木质纤维素，降温到110℃，实施剪切，泵压>1Mpa，运行20min，取样测25.0℃±1.0℃锥入度（中控）。后加入聚异丁烯链段共聚物、轻质碳酸钙（在剪切状态下）20min时取样测锥入度，在符合要求的情况下，经脱气入包装，得到成品。
所得成品的技术参数：锥入度（25℃±1℃、0.1mm）230，磨斑直径MMASTMD 22960.85，水封性（35bara 25℃）修改MATSUMURA方法 无水，泵送性（25℃ 10bars g/minASTMD）46，生物降解（CECL-33-93）88%。
实施例三：
一种可生物降解的主轴承密封脂，其各组分的重量百分比如下：油酸甲酯41.3％、聚α烯烃26.0％、十二羟基硬脂酸7％、硬脂酸1.5％、氢氧化锂1.1％、氢氧化钙0.1％、氰尿酸三聚氰胺盐3.5％、二苯胺0.4％、石油磺酸钡1.2％、硫化异丁烯1.8％、木质纤维素2.9％、聚异丁烯链段共聚物4.7％、轻质碳酸钙8.5％。
本发明还提供一种可生物降解的主轴承密封脂的制备方法，包括以下步骤：
S1）：启动搅拌，将油酸甲酯、聚α烯烃的各1/3投入，启动升温装置90℃保持5min，将十二羟基硬脂酸、硬脂酸，氢氧化锂、氢氧化钙投入反应釜，升温120℃，反应1h。反应后升温到170℃，投入蓖麻油甲酯、聚α烯烃的另1/3，且升温到210℃。
S2）：转入调合釜，过程中投入最后的1/3油酸甲酯、聚α烯烃。搅拌降温过程中投入氰尿酸三聚氰胺盐、二苯胺、石油磺酸钡、硫化异丁烯、木质纤维素，降温到120℃，实施剪切，泵压>1Mpa，运行20min，取样测25.0℃±1.0℃锥入度（中控）。后加入聚异丁烯链段共聚物、轻质碳酸钙（在剪切状态下）20min时取样测锥入度，在符合要求的情况下，经脱气入包装，得到成品。
所得成品的技术参数：锥入度（25℃±1℃、0.1mm）240，磨斑直径MMASTMD 22960.85，水封性（35bara 25℃）修改MATSUMURA方法 无水，泵送性（25℃ 10bars g/minASTMD）45，生物降解（CECL-33-93）87%。
本发明通过添加不同的组分材料，对主轴承密封脂的特性进行增强，提高其极压抗磨性、密封性、泵送性、抗氧性、润滑性、生物降解性。保证盾构机掘进过程对主轴承润滑密封的使用要求，延长其使用寿命，地下水资源不受污染。
尽管已经示出和描述了本发明的实施例，对于本领域的普通技术人员而言，可以理解在不脱离本发明的原理和精神的情况下可以对这些实施例进行多种变化、修改、替换和变型，本发明的范围由所附权利要求及其等同物限定。
Claims (2)
1.一种可生物降解的主轴承密封脂，其特征在于：所述可生物降解的主轴承密封脂中各组分的重量百分比如下：油酸甲酯38.6～47.0％、聚α烯烃21.5～28.0％、十二羟基硬脂酸4.5～7.5％、硬脂酸1.5～2.6％、氢氧化锂0.5～1.1％、氢氧化钙0.1～0.3％、氰尿酸三聚氰胺盐2.5～3.5％、二苯胺0.4～0.6％、石油磺酸钡0.9～1.2％、硫化异丁烯1.3～1.8％、木质纤维素2.9～3.8％、聚异丁烯链段共聚物4.7～9.7％、轻质碳酸钙4.5～8.5％。
2.根据权利要求1所述的可生物降解的主轴承密封脂，其特征在于：其制备方法，包括以下步骤：
S1）：启动搅拌，将油酸甲酯、聚α烯烃的各1/3投入，启动升温装置70.0～90.0℃保持5min，将十二羟基硬脂酸、硬脂酸，氢氧化锂、氢氧化钙投入反应釜，升温100.0～120.0℃反应1h；
反应后升温到150.0～170.0℃，投入蓖麻油甲酯、聚α烯烃的另1/3，且升温到190.0～210.0℃；
S2）：转入调合釜，过程中投入最后的1/3油酸甲酯、聚α烯烃；搅拌降温过程中投入氰尿酸三聚氰胺盐、二苯胺、石油磺酸钡、硫化异丁烯、木质纤维素，降温到100.0～120.0℃，实施剪切，泵压>1Mpa，运行20min，取样测25.0℃±1.0℃锥入度（中控），后加入聚异丁烯链段共聚物、轻质碳酸钙（在剪切状态下）20min时取样测锥入度，在符合要求的情况下，经脱气入包装，得到成品。
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