回转窑轮带剥落掉块的原因与焊接处理

回转窑是水泥厂的关键设备,轮带发生剥落掉块是窑中的常见故障。轮带发生剥落掉块的原因主要是表面接触疲劳破坏,处理剥落掉块的方法主要是现场焊接。在焊接过程中,只要严格按照工艺技术措施操作,采取冷焊接工艺进行焊接,可以解决轮带现场焊接的技术难点。     

Handling of buses on slippery roads during the influence of side wind—a study of the effects of different tyres

Accident statistics assembled by the Swedish National Road and Transport Research Institute (VTI) have shown that buses are overrepresented when it comes to accidents on icy and snowy roads. For a better understanding of the problem, the performance of modern summer and winter tyres on winter road conditions had to be assessed. The objective of this work has been to go beyond standard road grip studies, and instead investigate how the driver's possibility to deal with one challenging situation depends on the tyres and tyre configuration. This paper describes a novel methodology where measurements with different tyres on ice in VTI's tyre test facility, enabled a simulator study for evaluating the impact of different tyre characteristics when driving in conditions with strong side wind on a slippery road.The main results of the study are: to deal with strong side wind, good front wheel grip is most important, and while non-studded winter tyres provided little or no improvement over summer tyres, studded winter tyres significantly reduced the risk to run off the road. Furthermore, it is very difficult for the drivers to judge, beforehand, whether a vehicle with a particular tyre configuration will perform good or bad.     

浅析客车轮胎磨损的原因及解决方案

分析客车在营运过程中出现的轮胎异常磨损问题,并对问题产生的原因及解决方案进行探讨。     

井下胶轮车油气悬架系统改进设计与分析

根据某型井下胶轮车油气悬架系统的结构特点和工作原理,阐述其在减振和调节车高两方面存在的问题和不足,提出新的油气悬架系统方案.详细分析新方案的工作原理,采用多体系统动力学的方法,在ADAMS中建立胶轮车油气悬架系统二自由度动力学振动模型,通过仿真分析,表明新油气悬架系统能够有效发挥阻尼阀的作用,对胶轮车振动的衰减更为显著,有利于改善胶轮车的行驶平顺性.     

Effect of Vinyl Alcohol-Phthalic Anhydride on Properties of Low Density Polyethylene (LDPE)/Tyre Dust (TD) Composites

The effect of vinyl alcohol-phthalic anhydride as a coupling agent on the tensile properties, morphology, and thermal degradation of low density polyethylene/tyre dust (LDPE/TD) composites was studied. LDPE/TD composites with different tyre dust loading and the addition of vinyl alcohol-phthalic anhydride were prepared with Z-blade mixer at 180°C and rotor speed of 50 rpm. The result indicated that LDPE/TD_M composites with vinyl alcohol-phthalic anhydride show higher values of tensile strength, Young's modulus and mass swell, but lower elongation at break than LDPE/TD composites without vinyl alcohol-phthalic anhydride. The SEM micrographs showed that the tyre dust was more widely dispersed in the LDPE matrix with the addition of vinyl alcohol-phthalic anhydride as a coupling agent. It was also found that the addition of vinyl alcohol-phthalic anhydride offers better thermal stability in the LDPE/TD_M composites than LDPE/TD composites.     

井下铲运机行驶路面质量对生产效率的影响

金岭铁矿以进口铲运机为雏型，设计制造了金－０７５型电动铲运机，并在该矿获得推广应用。文章介绍了金－０７５型电动铲运机的主要技术性能及应用简况，并重点就路面质量对材料消耗和生产效率的影响作了对比分析。     

Determination of physical and chemical properties of waste tyres in usage/storage areas

Used tyres interact with soil, water and the atmosphere during temporary or permanent storage and also when used as additive or paving materials in landscapes, asphalt, concrete and for coastal protection. Various organic and inorganic compounds can penetrate into the environment from used tyres at various rates dependent on climatic and soil conditions. In this study, laboratory leaching batch experiments were conducted to determine the heavy metals and other constituents that could possibly penetrate into the leachate created during tyre usage/storage. The results obtained in this study showed that tyres were dissolved due to their usage and the climatic and environmental conditions thus leading to soil and groundwater pollution in their usage/reuse/storage/disposal areas. Zinc concentrations were the highest among the heavy metals measured in the simulated leachate. The average weight loss for all tyre samples was calculated as 3.6‰.     

基于PLC与伺服液压的装胎机控制系统设计

设计了装胎机控制系统,该系统为电液闭环控制系统,以PLC为控制核心,结合变频器、伺服电机、位移传感器等,完成了轮胎的高效运送和精确定位,实现了自动组胎功能。     

采用神经网络轮胎模型的汽车操纵稳定性仿真

运用人工神经网络理论中的多层前向ＢＰ网络,建立轮胎侧偏特性模型,进而将人工神经网络轮胎代人车模型中进行操纵稳定性仿真研究。     

子午线轮胎用硫化剂

简要综述子午线轮胎用硫化剂的品种、生产方法和作用机理。普通硫黄,不溶性硫黄、硫给予体和酚醛树脂是子午线轮胎用的主要硫化剂。