CN107502434A - 一种电动汽车变速箱专用油及其制备方法 - Google Patents

一种电动汽车变速箱专用油及其制备方法 Download PDF

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CN107502434A
CN107502434A CN201710825870.6A CN201710825870A CN107502434A CN 107502434 A CN107502434 A CN 107502434A CN 201710825870 A CN201710825870 A CN 201710825870A CN 107502434 A CN107502434 A CN 107502434A
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丁杨
张柏华
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Liaoning Lanjing Technology Co Ltd
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Abstract

本发明涉及电动汽车传动系统领域,特别涉及一种电动汽车变速箱专用油及其制备方法。按重量份数计,该专用油含有:组分A,至少一种基础油;组分B,至少一种粘度指数改进剂;组分C,至少一种极压抗磨剂;组分D,至少一种抗氧剂;组分E,至少一种密封材料容胀剂;组分F,至少一种降凝剂;组分G,至少一种无灰分散剂;组分H,至少一种防锈剂;组分I,至少一种金属钝化剂;组分J,氟碳材料;组分K,至少一种修饰剂。该专用油能满足电动车变速箱中齿轮和轴承的润滑要求,具有优良的低温性能、极压抗磨特性、抗氧化性、防锈防腐性,且成分简单、制造工艺简单。

Description

一种电动汽车变速箱专用油及其制备方法
技术领域
本发明涉及电动汽车传动系统领域,特别涉及一种电动汽车变速箱专用油及其制备方法。
背景技术
随着石油资源的日益紧缺、油价的高涨以及生态环境压力的不断加大,新能源逐步替代并最终取代传统能源将是大势所趋,而新能源技术也必将成为人类未来赖以生存的核心技术。近年来,电动汽车已被世界公认为21世纪汽车工业改造和发展的主要方向。
在新能源汽车方向选择上,目前主要有三个选择方面:混合动力汽车、纯电动汽车及氢燃料电池车。氢燃料电池车以氢作为动力源,通过和氧化剂的作用将化学能转换为电能,转换过程不涉及燃烧,无机械损耗,但氢燃料电动车目前技术尚不成熟,还存在着安全隐患。因此低排放、低油耗的电动汽车成为研究热点,与此同时各种新材料和新技术在电动汽车上不断被开发应用,电动车已经进入全新的发展阶段。
目前的电动车都配有2档、3档或多档变速箱,该变速箱的输入转速通常是4000~5000r/min左右,与传统柴油机公交车上的变速箱相比,输入转速提高1倍以上,同时齿轮箱体积小,输出扭矩大,这些特点导致传统的齿轮油在该变速箱上使用,齿轮油温升过高,导致过早氧化,并出现后齿轮磨损严重的现象,无法正常工作。从上述这些要求来看,纯电动车变速箱润滑油若要保证变速箱的齿轮部件润滑顺畅,就需要采用特定的配方技术。
氟化石墨烯是一种氟与碳的插层状化合物,面间距约为石墨层间距的两倍,具有良好的润滑性能。并且,CFx(x=0.2~0.9)不受任何气氛影响,而石墨在惰性和还原气氛、二硫化钼在惰性气氛下润滑性能都会显著降低。纳米级别的CFx,润滑性能比二硫化钼好,不但减摩抗磨性优良,且不腐蚀金属。基于CFx的上述性能特点,CFx可作为固体润滑剂使用。因为石墨层间电子与氟产生强的共价键,F-C键不易断开,层间键能大幅减小。CFx的层间结合能非常小(约为9.36kJ/mol),远低于石墨层间结合能(41.8kJ/mol),故CFx层间更容易滑移产生薄片状体。CFx中氟原子间有相互的斥力,能抵消外部压力。因此,即使在高温度、高速度和高压力的条件下,也能表现出良好的润滑性。
国内对电动车的研究起步较晚,对电动车及变速箱用润滑油产品的公开报道还很少,亟需对现有技术进行改进,以提供一种性能更优异的变速箱专用油。
发明内容
为了克服现有产品存在的以上问题,本发明的目的在于提供一种具有优良的低温性能、极压抗磨特性、抗氧化性、防锈防腐性,且成分简单、制造工艺简单的电动汽车变速箱专用油及其制备方法。
为了达到上述效果,本发明的技术方案是:
一种电动汽车变速箱专用油,按重量份数计,该专用油含有:
其中,基础油为矿物基础油或合成基础油中的一种或两种以上;粘度指数改进剂为聚甲基丙烯酸酯、聚异丁烯中的一种或两种以上;极压抗磨剂选自单烷基长链酸性亚磷酸酯、二硫代氨基甲酸酯、二巯基噻二唑、含羟基噻二唑衍生物中的一种或两种以上;抗氧剂为酚型抗氧剂或胺型抗氧剂中的一种或两种以上;氟碳材料为氟化石墨烯、改性氟化石墨烯、氟化碳中的一种或两种以上;密封材料容胀剂为酯类油;修饰剂为胺类化合物。
所述的电动汽车变速箱专用油,矿物油选自III类矿物油,合成基础油选自聚α-烯烃PAO合成油、酯类合成油、聚醚类合成油中的一种或两种以上。
3、根据权利要求1所述的电动汽车变速箱专用油,其特征在于,含羟基噻二唑衍生物,其具有如下结构式:
其中,R为:
其中,R1、R2分别独立选自C5~C30的直链烷基或C5~C30的环烷基。
所述的电动汽车变速箱专用油,极压抗磨剂选自十八烷基亚磷酸酯、2-乙烷-二硫代氨基甲酸酯、2-(2-羟基丙基)-5-巯基-1,3,4-噻二唑、2,5-二(2-羟基十二烷基)-1,3,4-噻二唑中的一种或两种以上。
所述的电动汽车变速箱专用油,胺型抗氧剂选自戊基二苯胺、双丁基二苯胺、二辛基二苯胺、苯乙烯化二苯胺等,酚型抗氧剂选自2,6-二叔辛基酚、含硫醚基的高分子量酚类中的一种或两种以上。
所述的电动汽车变速箱专用油,密封材料容胀剂为三羟甲基丙烷辛癸酸酯;降凝剂为聚甲基丙烯酸酯;无灰分散剂为聚异丁烯基丁二酰亚胺;防锈剂为烯基丁二酸半酯;金属钝化剂为噻二唑十八胺乙醛缩合物。
所述的电动汽车变速箱专用油的制备方法,该方法的步骤如下:先按比例将所需量的基础油加入到带搅拌器的不锈钢调和釜中,其次将按比例所需量的粘度指数改进剂、极压抗磨剂、抗氧剂、密封材料容胀剂、降凝剂、无灰分散剂,防锈剂、金属钝化剂加入到调和釜中,以45~55℃调和2~4小时,直至各组分均匀溶解;然后按比例加入氟碳材料和修饰剂,球磨20~40h,得到成品。
本发明的优点及有益效果是:
本发明专用油能满足电动车变速箱中齿轮和轴承的润滑要求,具有优良的低温性能、极压抗磨特性、抗氧化性、防锈防腐性,且成分简单、制造工艺简单。
具体实施方式
在具体实施过程中,本发明的电动汽车变速箱专用油,按重量份数计,该专用油含有:组分A,至少一种基础油;组分B,至少一种粘度指数改进剂;组分C,至少一种极压抗磨剂;组分D,至少一种抗氧剂;组分E,至少一种密封材料容胀剂;组分F,至少一种降凝剂;组分G,至少一种无灰分散剂;组分H,至少一种防锈剂;组分I,至少一种金属钝化剂;组分J,氟碳材料;组分K,至少一种修饰剂。
A组分较适宜的基础油选自矿物油或合成基础油中的一种或两种以上,含量为68~91份;优选地,矿物油选自III类矿物油,合成基础油选自聚α-烯烃(PAO)合成油、酯类合成油、聚醚类合成油中的一种或两种以上;
更优选地,为了满足使所得润滑油具有最佳的低温性能的要求,同时具有最佳的竞技性,基础油为III类矿物油或III类矿物油与PAO合成油的混合物,PAO合成油优选为PAO4或PAO10。
B组分较适宜的粘度指数改进剂为聚甲基丙烯酸酯或聚异丁烯中的一种或两种以上,含量为5~10份,其作用是:调节油品粘度和粘度指数,改善润滑油的粘温性能;
C组分较适宜的极压抗磨剂为单烷基长链酸性亚磷酸酯、二硫代氨基甲酸酯和二巯基噻二唑、含羟基噻二唑衍生物中的一种或两种以上,含量为0.5~4份,其作用是:在极压条件下在较高负荷的部件上生成薄的韧性很强的膜来防止金属与金属接触。
所述的含羟基噻二唑衍生物,其具有如下结构式:
其中,R为:
其中,R1、R2分别独立选自C5~C30的直链烷基或C5~C30的环烷基。
优选地,极压抗磨剂选自十八烷基亚磷酸酯、2-乙烷-二硫代氨基甲酸酯、2-(2-羟基丙基)-5-巯基-1,3,4-噻二唑、2,5-二(2-羟基十二烷基)-1,3,4-噻二唑中的一种或两种以上;
D组分较适宜的抗氧剂选自酚型抗氧剂或胺型抗氧剂,或酚型抗氧剂和胺型抗氧剂的任意组合物,含量为0.5~4份,其作用是:抑制油品氧化。胺型抗氧剂选自戊基二苯胺、双丁基二苯胺、二辛基二苯胺、苯乙烯化二苯胺等,酚型抗氧剂选自2,6-二叔辛基酚、含硫醚基的高分子量酚类等;
E组分较适宜的密封材料容胀剂为酯类油,含量为0.5~2份,其作用是:吸收多余溶剂;优选地,密封材料容胀剂为三羟甲基丙烷辛癸酸酯;
F组分较适宜的降凝剂优选为聚甲基丙烯酸酯,含量为0.3~2份,其作用是:降低产品倾点和改善低温流动性;
G组分较适宜的无灰分散剂优选为聚异丁烯基丁二酰亚胺,含量为0.5~4份;其作用是:使固体污染物以胶体状态悬浮于油中,防止油泥、漆膜和淤渣等物质沉积在发动机部件上;
H组分较适宜的防锈剂优选为烯基丁二酸半酯,含量为0.5~5份,其作用是:在金属部件表面形成一层薄膜防止金属锈蚀;
I组分较适宜的金属钝化剂优选为噻二唑十八胺乙醛缩合物,含量为0.1~0.5份,其作用是:使金属钝化失去催化活性;
J组分较适宜的氟碳材料为氟化石墨烯、改性氟化石墨烯和氟化碳中的一种或两种以上,含量为0.1~0.5份,其作用是:提高润滑性能;
K组分较适宜的修饰剂为胺类化合物,含量为1~3份,其作用是:提高氟碳材料在油品中的分散;优选地,修饰剂为乙醇胺、聚乙二醇醚胺和聚四氢呋喃醚胺中的一种或两种以上;
上述电动汽车变速箱专用油的制备方法是:先按比例将所需量的组分A加入到带搅拌器的不锈钢调和釜中,其次将按比例所需量的粘度指数改进剂B、极压抗磨剂C、抗氧剂D、密封材料容胀剂E、降凝剂F、无灰分散剂G,防锈剂H、金属钝化剂I加入到调和釜中,以45~55℃调和2~4小时,直至各组分均匀溶解。然后按比例加入氟碳材料J和修饰剂K,球磨20~40h,得到成品。
本发明通过纯电动车动力总成台架试验和纯电动车行车试验来评价纯电动车变速箱专用油的性能。
纯电动车动力总成台架试验具体为:试验台所允许的变速箱最高输入转速6000rpm,变速箱最大输出转矩1000Nm。变速箱的转速可以通过总控制台进行手动实时控制,也可以通过编程来实现预定的转速和转矩调整。通过试验来考察齿轮油的抗磨损和抗疲劳性能,试验结束后检查主动轮和从动轮表面的磨损、点蚀和擦伤状况。通过对试验后的油品的性能进行分析,判定油品的适应性。
纯电动车行车试验具体为:试验在纯电动车上开展油品的实际应用情况,通过分析油品的粘度分析油品的适应性。
以下实例便于更清楚了解本发明,对本发明作进一步说明,但并不限定本发明。
实施例1:
本实施例中,按重量份数计,电动汽车变速箱专用油,由以下组分配制而成:
实施例2:
本实施例中,按重量份数计,电动汽车变速箱专用油,由以下组分配制而成:
实施例3:
本实施例中,按重量份数计,电动汽车变速箱专用油,由以下组分配制而成:
检测及分析评定结果见表1,同时选用市售的电动车变速箱油作为参比油进行性能对比。
表1实例1.、2、3和参比油的性能比较
从表1的实验结果可以看出:本发明专用油具有更好的抗磨损性、抗氧化性和润滑性,通过纯电动车的低速高扭矩试验、高速低扭矩试验、冲击试验以及加速试验,可以满足纯电动车变速箱中齿轮和轴承等部件的润滑要求。
以上所述仅为本发明的优选实例而已,并不用于限制本发明,对于本领域的技术人员来说,其依然可对本发明进行修改或等同替换。凡在本发明的精神和原则之内,所作的任何修改、等同替换、改进等,均应包含在本发明的保护范围之内。

Claims (7)

1.一种电动汽车变速箱专用油,其特征在于,按重量份数计,该专用油含有:
其中,基础油为矿物基础油或合成基础油中的一种或两种以上;粘度指数改进剂为聚甲基丙烯酸酯、聚异丁烯中的一种或两种以上;极压抗磨剂选自单烷基长链酸性亚磷酸酯、二硫代氨基甲酸酯、二巯基噻二唑、含羟基噻二唑衍生物中的一种或两种以上;抗氧剂为酚型抗氧剂或胺型抗氧剂中的一种或两种以上;氟碳材料为氟化石墨烯、改性氟化石墨烯、氟化碳中的一种或两种以上;密封材料容胀剂为酯类油;修饰剂为胺类化合物。
2.根据权利要求1所述的电动汽车变速箱专用油,其特征在于,矿物油选自III类矿物油,合成基础油选自聚α-烯烃PAO合成油、酯类合成油、聚醚类合成油中的一种或两种以上。
3.根据权利要求1所述的电动汽车变速箱专用油,其特征在于,含羟基噻二唑衍生物,其具有如下结构式:
其中,R为:
其中,R1、R2分别独立选自C5~C30的直链烷基或C5~C30的环烷基。
4.根据权利要求1所述的电动汽车变速箱专用油,其特征在于,极压抗磨剂选自十八烷基亚磷酸酯、2-乙烷-二硫代氨基甲酸酯、2-(2-羟基丙基)-5-巯基-1,3,4-噻二唑、2,5-二(2-羟基十二烷基)-1,3,4-噻二唑中的一种或两种以上。
5.根据权利要求1所述的电动汽车变速箱专用油,其特征在于,胺型抗氧剂选自戊基二苯胺、双丁基二苯胺、二辛基二苯胺、苯乙烯化二苯胺等,酚型抗氧剂选自2,6-二叔辛基酚、含硫醚基的高分子量酚类中的一种或两种以上。
6.根据权利要求1所述的电动汽车变速箱专用油,其特征在于,密封材料容胀剂为三羟甲基丙烷辛癸酸酯;降凝剂为聚甲基丙烯酸酯;无灰分散剂为聚异丁烯基丁二酰亚胺;防锈剂为烯基丁二酸半酯;金属钝化剂为噻二唑十八胺乙醛缩合物。
7.一种权利要求1至6所述的电动汽车变速箱专用油的制备方法,其特征在于,该方法的步骤如下:先按比例将所需量的基础油加入到带搅拌器的不锈钢调和釜中,其次将按比例所需量的粘度指数改进剂、极压抗磨剂、抗氧剂、密封材料容胀剂、降凝剂、无灰分散剂,防锈剂、金属钝化剂加入到调和釜中,以45~55℃调和2~4小时,直至各组分均匀溶解;然后按比例加入氟碳材料和修饰剂,球磨20~40h,得到成品。
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