基于Matlab的浸锑石墨密封材料的分形特征研究

Study of Fractal Characteristics of Antimony Impregnated Graphite Seal Material Based on a Matlab

针对电厂用的2种浸锑和1种不浸锑的磨煤机用石墨密环材料，利用Matlab编写的分形维数计算程序计算其分形维数，并进行摩擦磨损实验．结果表明：未浸锑材料的相对磨损率约为浸锑的10～30倍，摩擦因素约为2倍；浸锑石墨材料的分形维数（约1．5～1．7）小于不浸锑的（约1．8）；摩擦因数随着分形维的增加而增大，磨损量亦随着分形维数的增加而增大．

Taking two kinds of antimony impregnated graphite and one pure graphite seal rings used in medium speed coal mill as samples, the fractal dimensions were calculated by a Matlab program and friction and wear experiments were carried out. The results show that the relative wear rate and friction factors of the non-antimony impregnated graphite are about 10--30 times and 2 times that of the antimony impregnated graphite, respectively. The fraetal dimension of antimony impregnated graphite （ about 1.5--1.7） is lower than the non-antimony impregnated graphite （ about 1.8 ）. The friction factors and wear loss increase along with the increasing of fractal dimension.