摘要
为了改善解决寒冷地区冬季运煤过程中改向滚筒、皮带上存在的冻粘问题,在查阅相关冻粘理论的基础上,受仿生学启发,对仿生凸包几何结构在改向滚筒、皮带上的应用进行了理论分析和试验研究。理论上验证了仿生凸包几何结构可变相增大材料表面的水接触角,即可在一定程度上减小冻粘强度;参考已有防冻粘特性试验研究,利用超高分子量聚乙烯(UHMW-PE),设计加工了一块高度为1.0 mm、投射半径为2.4 mm、中心距为6.4 mm的仿生凸包模板和另一块同种材料的光滑模板,通过自制的冻粘强度测试装置,在温度为-25℃和冷冻时间为3 h的条件下,测试了两种模板与含水率40%煤泥的冻粘特性。结果显示:仿生凸包模板的法向冻粘强与切向冻粘强度分别降低了8%、12%左右,即从试验方面验证了仿生几何型凸包的确具有一定的防冻粘性能,希望可以运用于防冻粘领域。
In order to solve the freezing adhesive problem on roller and belt during coal transportation process in winter, on the basis of referring to relevant freezing adhesive theory, inspired by bionics, we did the theoretical analysis and experimental research about the application of bionic convex hull geometry structure on the roller and belt. In theory, it is verified bionic convex hull geometry structure can increase the the water contact angle, to a certain extent, it can reduce the freezing adhesive strength. We referred to the existing anti-freezing adhesive experimental study, used the UHMW-PE, designed and processed a bionic convex hull template, the height is 1.0 mm, projected radius is 1.0 mm, the center distance is 6. 4 mm, and another same material smooth template, by homemade freezing adhesive strength test device, under conditions of - 25℃ temperature and 3h freezing time, we tested the freezing adhesive characteristics of two kinds of templates with moisture content 40% of the coal slime. The results showed that the normal freezing adhesive strength and tangential freezing adhesive strength of bionic convex hull template reduced about 8% and 12% respectively, we verified the bionic geometric convex hull indeed had certain anti- freezing ability from the experiment aspect, hope can be used in anti-freezing adhesive field.
出处
《机械强度》
CAS
CSCD
北大核心
2017年第2期291-296,共6页
Journal of Mechanical Strength
基金
国家自然科学基金项目(51374120)资助~~
关键词
仿生学
煤
冻粘
凸包
水接触角
超高分子量聚乙烯
Bionics
Coal
Freezing adhesion
Convex hull
Water Contact Angle
UHMW-PE
