【摘要】 针对现代机械产品在沙尘环境中的适应性问题 ,提出了基于摩擦学的沙尘环境分析法 ,并应用此方法进行了实验 ,采用干沉积法收集了西安市 4～ 6月份室外日常降尘以及一次沙尘暴降尘 ;使用感量为 0 1mg的电子天平测量了降尘的沉积通量 ,并用 2 0 0×的FMIII型铁谱显微镜分析了降尘粒子的特征粒径 (粒子二维投影图中的短径 )和形状不规则度 (粒子二维投影图中的长径与短径的比值 )。沉积通量分析的结果表明 :非沙尘暴期间平均沉积通量为 0 5 15 g·m-2 ·day-1,在沙尘暴期间出现最高值 (1 33g·m-2 ·day-1)。降尘粒子的分析结果表明 :不同降尘 (非沙尘暴降尘和沙尘暴降尘 )的特征粒径的平均值在 17μm左右波动 ,90 %的粒子的特征粒径小于 30 μm ;形状不规则度小于 1 5的粒子占 5 0 %～ 6 0 % ,小于 2的占 80 %以上 ,小于 3的占 90 %以上。更多还原

【Abstract】 Considering compatibility problem of modern mechanical product in dust environment,an analysis method for dust environment based on tribology is put forward and experimented.The experiment was done in Xi’An,a Chinese city.Dry deposition method was employed to collected fall dust outdoor,separately in April,May,July and KOSA (yellow sand storm).Deposition flux of the fall dust was studied statistically by using ecectronic balance with 0.1mg resoution.200×FMIII ferrograph microscope was employed to analyze character diameter (minor dimension in particle’s two-dimension project) and shape irregularity (ratio of major to minor dimension in particle’s two-dimension project) of the fall dust particles.The deposition flux analysis result displays the non-KOSA average value is 0.515 g·m -2 .day -1 ,while KOSA value 1.33 g·m -2 ·day -1 .The particle analysis result shows that the average character diameter values of different fall dust (non-KOSA and KOSA) fluctuates at 17μm,The particles with average character size below 30μm account for 90%,and the particles with shape irregularity below 1.5 account for 50～60%,2 for 80% and 3 for 90%.更多还原