CN110436925B - 一种高速列车受电弓用纯炭滑板及其制备方法 - Google Patents
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Abstract
本发明涉及一种高速列车受电弓用纯炭滑板及其制备方法,属于高速列车受电弓滑板用材料及其制备方法技术领域,解决炭质滑板使用寿命短、配方原料种类繁多、制备工艺复杂的技术问题。解决方案为:原料由焦粉、石墨粉、酚醛树脂和沥青构成;制备过程包括配料、混捏、模压、焙烧、浸渍和二次焙烧六个工艺段。具有原料和工艺简单、强度高、润滑性好、使用寿命长等特点,可完全满足高速列车受电弓用滑板材料的要求。
Description
技术领域
本发明属于高速列车受电弓滑板用材料及其制备方法技术领域,具体涉及的是一种高速列车受电弓用纯炭滑板及其制备方法。
背景技术
受电弓滑板需要在高速滑动过程中完成电能的传输,同时还要承受机械磨损、硬点冲击、电弧烧蚀和化学腐蚀的共同损坏,工作环境十分恶劣。作为机车组的动力部件,滑板材料的性能和质量稳定性对于车辆的稳定性、安全性和可靠性等方面至关重要。
现用的滑板材料主要有粉末冶金滑板和碳质滑板两种,其中粉末冶金滑板虽然导电性较好,但其基体成分主要以铜和铁等金属为主,对金属导线的磨损比较严重。所以,粉末冶金滑板只有部分低速的电力机车在使用,大部分电力机车,特别是高速列车动车组使用的是炭质滑板材料。炭质滑板又可分为纯炭滑板和浸金属炭滑板,二者性能上各有千秋,其中纯炭滑板以其突出的轻质、耐磨、对导线磨损小、抗电弧性能好等优点,大量应用在各种速度、各种型号的高速列车受电弓上。
国外炭滑板的产品使用寿命都在十几万公里以上,而国内炭滑板使用寿命都比较短,一般不超过十万公里,而且配方原料种类繁多,制备工艺复杂。如专利一种采用新工艺制备高速列车受电弓炭滑板的方法(CN105236983A),其原料就包含鳞片石墨、胶体石墨、碳粉、氧化石墨烯、改质沥青、炭纤维等至少六种组分,制备工艺包括配料、干混、混捏、轧片、磨粉、再混合、等静压压制、焙烧、浸渍、再焙烧等至少十一道工序,十分复杂,而且最终产品的磨耗也比较高,2.45mm/万公里,折合使用寿命6.94万公里。
专利一种用于装备电力机车受电弓炭滑板的制备方法(CN102898143A),原料种类也比较多,包括沥青焦、人造石墨粉、炭黑、沥青、硬脂酸、铜等六种组分, 产品的磨耗也很高,4.3mm/万公里,折合使用寿命4.0万公里。
发明内容
为了克服现有技术中存在的不足,解决炭质滑板使用寿命短、配方原料种类繁多、制备工艺复杂的技术问题,本发明提供一种高速列车受电弓用纯炭滑板及其制备方法。
本发明的设计构思为:通过在沥青粘结剂中引入酚醛树脂,利用树脂炭的难石墨化、硬度高、强度高等特点,提高纯碳滑板的耐磨性、强度、抗冲击性能;同时,在骨料中引入石墨粉,提高材料的润滑性、导电性和耐磨性,制备出使用寿命长的高性能高速列车受电弓用纯炭滑板材料。
本发明通过以下技术方案予以实现。
一种高速列车受电弓用纯炭滑板,其中:所述纯炭滑板材料的原料包括粉体原料和液体原料,粉体原料和液体原料的质量比为1:0.18~1:0.32;所述粉体原料包括焦粉和石墨粉,焦粉和石墨粉的质量比为1:0.1~1:0.6;所述液体原料包括沥青与酚醛树脂,沥青与酚醛树脂的质量比为1:0.1~1:0.4。
进一步地,所述焦粉为石油焦或者沥青焦,焦粉的粒径为30~300目。
进一步地,所述石墨粉为人造石墨粉或鳞片石墨粉,石墨粉的粒径为50~300目。
进一步地,所述酚醛树脂为热塑性酚醛树脂。
进一步地,所述沥青为煤沥青或石油沥青。
一种高速列车受电弓用纯炭滑板的制备方法,包括以下步骤:
S1、配料:将焦粉和石墨粉按质量比1:0.1~1:0.6混合均匀,获得粉体原料;将沥青与酚醛树脂按质量比1:0.1~1:0.4混合均匀,获得液体原料,留待后步使用;
S2、混捏:将步骤S1中混合好的粉体原料和液体原料按质量比1:0.18~1:0.32放入混捏机中混捏,混捏温度为130~200℃,混捏时间为0.5~2小时;
S3、模压:将步骤S2混捏后的原料放入模具中加压成型,成型压力为120~200MPa;
S4、焙烧:将步骤S3模压成型制得的压坯放入焙烧炉中焙烧,焙烧温度为700~1300℃;
S5、浸渍:将步骤S4焙烧后的碳制品放入浸渍釜中进行沥青浸渍,浸渍釜的压力为1~3MPa,浸渍温度为200~280℃,浸渍时间为0.5~3小时;
S6、二次焙烧:将步骤S5浸渍好的碳制品重新放入焙烧炉中进行二次焙烧,二次焙烧温度为800-1100℃,制得受电弓用纯炭滑板。
本发明具有如下有益效果:
本发明提供的一种高速列车受电弓用纯炭滑板及其制备方法,与现有技术相比,具有原料构成简单,制备工艺简化、耐磨性好、强度高、使用寿命长等特点,可完全满足高速列车受电弓用滑板材料的要求。
具体实施方式
下面结合实施例对本发明作进一步的详细描述。
实施例1
S1、配料:将粒径为30目的石油焦与粒径为300目的人造石墨粉按质量比1:0.1混合均匀,获得粉体原料;将煤沥青与热塑性酚醛树脂按质量比1:0.18混合均匀,获得液体原料,留待后步使用;
S2、混捏:将步骤S1中混合好的粉体原料和液体原料按质量比1:0.18放入混捏机中混捏,混捏温度为200℃,混捏时间为0.5小时;
S3、模压:将步骤S2混捏后的原料放入模具中加压成型,成型压力为200MPa;
S4、焙烧:将步骤S3模压成型制得的压坯放入焙烧炉中焙烧,焙烧温度为1300℃;
S5、浸渍:将步骤S4焙烧后的碳制品放入浸渍釜中进行沥青浸渍,浸渍釜的压力为2MPa,浸渍温度为200℃,浸渍时间为2小时;
S6、二次焙烧:将步骤S5浸渍好的碳制品重新放入焙烧炉中进行二次焙烧,二次焙烧温度为800℃,制得受电弓用纯炭滑板材料,其密度为1.73 g/cm3,抗弯强度为32 MPa,电导率为38.0μΩ.m,磨损率为1.7mm/万公里。
实施例2
S1、配料:将粒径为300目的沥青焦与粒径为50目的天然鳞片石墨粉按质量比1:0.3混合均匀,获得粉体原料;将煤沥青与热塑性酚醛树脂按质量比1:0.1混合均匀,获得液体原料,留待后步使用;
S2、混捏:将步骤S1中混合好的粉体原料和液体原料按质量比1:0.32放入混捏机中混捏,混捏温度为130℃,混捏时间为2小时;
S3、模压:将步骤S2混捏后的原料放入模具中加压成型,成型压力为160MPa;
S4、焙烧:将步骤S3模压成型制得的压坯放入焙烧炉中焙烧,焙烧温度为700℃;
S5、浸渍:将步骤S4焙烧后的碳制品放入浸渍釜中进行沥青浸渍,浸渍釜的压力为3MPa,浸渍温度为280℃,浸渍时间为1.5小时;
S6、二次焙烧:将步骤S5浸渍好的碳制品重新放入焙烧炉中进行二次焙烧,二次焙烧温度为1100℃,制得受电弓用纯炭滑板材料,其密度为1.76 g/cm3,抗弯强度为40 MPa,电导率为35.0μΩ.m,磨损率为1.0mm/万公里。
实施例3
S1、配料:将粒径为150目的沥青焦与粒径为100目的人造石墨粉按质量比1:0.6混合均匀,获得粉体原料;将石油沥青与热塑性酚醛树脂按质量比1:0.2混合均匀,获得液体原料,留待后步使用;
S2、混捏:将步骤S1中混合好的粉体原料和液体原料按质量比1:0.25放入混捏机中混捏,混捏温度为160℃,混捏时间为1小时;
S3、模压:将步骤S2混捏后的原料放入模具中加压成型,成型压力为100MPa;
S4、焙烧:将步骤S3模压成型制得的压坯放入焙烧炉中焙烧,焙烧温度为1100℃;
S5、浸渍:将步骤S4焙烧后的碳制品放入浸渍釜中进行沥青浸渍,浸渍釜的压力为2.5MPa,浸渍温度为250℃,浸渍时间为0.5小时;
S6、二次焙烧:将步骤S5浸渍好的碳制品重新放入焙烧炉中进行二次焙烧,二次焙烧温度为800℃,制得受电弓用纯炭滑板材料,其密度为1.75 g/cm3,抗弯强度为35 MPa,电导率为32.0μΩ.m,磨损率为1.0mm/万公里。
以上所述仅为本发明的优选实施例而并不用于限制本发明,在实施例技术方案中对单个或者多个技术参数进行同等替换形成新的技术方案,同样都在本发明要求保护的范围内;对于本领域的技术人员来说,本发明可以进行各种更改和变化。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 (6)
1.一种高速列车受电弓用纯炭滑板,其特征在于:所述纯炭滑板材料的原料包括粉体原料和液体原料,粉体原料和液体原料的质量比为1:0.18~1:0.32;所述粉体原料包括焦粉和石墨粉,焦粉和石墨粉的质量比为1:0.1~1:0.6;所述液体原料包括沥青与酚醛树脂,沥青与酚醛树脂的质量比为1:0.1~1:0.4。
2.根据权利要求1所述的一种高速列车受电弓用纯炭滑板,其特征在于:所述焦粉为石油焦或者沥青焦,焦粉的粒径为30~300目。
3.根据权利要求1所述的一种高速列车受电弓用纯炭滑板,其特征在于:所述石墨粉为人造石墨粉或鳞片石墨粉,石墨粉的粒径为50~300目。
4.根据权利要求1所述的一种高速列车受电弓用纯炭滑板,其特征在于:所述酚醛树脂为热塑性酚醛树脂。
5.根据权利要求1所述的一种高速列车受电弓用纯炭滑板,其特征在于:所述沥青为煤沥青或石油沥青。
6.一种如权利要求1所述的高速列车受电弓用纯炭滑板的制备方法,其特征在于包括以下步骤:
S1、配料:将焦粉和石墨粉按质量比1:0.1~1:0.6混合均匀,获得粉体原料;将沥青与酚醛树脂按质量比1:0.1~1:0.4混合均匀,获得液体原料,留待后步使用;
S2、混捏:将步骤S1中混合好的粉体原料和液体原料按质量比1:0.18~1:0.32放入混捏机中混捏,混捏温度为130~200℃,混捏时间为0.5~2小时;
S3、模压:将步骤S2混捏后的原料放入模具中加压成型,成型压力为120~200MPa;
S4、焙烧:将步骤S3模压成型制得的压坯放入焙烧炉中焙烧,焙烧温度为700~1300℃;
S5、浸渍:将步骤S4焙烧后的碳制品放入浸渍釜中进行沥青浸渍,浸渍釜的压力为1~3MPa,浸渍温度为200~280℃,浸渍时间为0.5~3小时;
S6、二次焙烧:将步骤S5浸渍好的碳制品重新放入焙烧炉中进行二次焙烧,二次焙烧温度为800-1100℃,制得受电弓用纯炭滑板。
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