串联式混炼工艺对不同填充份数白炭黑配方胶料的适应性研究

串联式混炼下游转子类型对不同白炭黑填充量混炼胶的串联式混炼过程有着不同的适应性。本文详细介绍了下游啮合转子、下游共流转子的连续混炼特点。进行了两种转子类型在不同白炭黑填充量情况下的混炼实验。分析对比实验数据,获得了串联式混炼不同下游转子类型对白炭黑填充量变化的适应性,以及白炭黑填充量对能耗、功率和混炼胶物理机械性能的影响。     

印尼BAYAH电厂一次风机故障原因分析与处理

本文针对印尼BAYAH电厂一次风机设备故障,详细的分析了故障产生的原因,介绍了三点法找转子动平衡和工装车削式在线修复电机滑环工法,阐述了两种工法的原理以及实施步骤。     

超重力场内气液传质强化研究进展

气液传质过程广泛存在于化学工业当中。气液传质强化技术的研究, 对缩短工艺流程、缩小设备尺寸、降低投资和运行成本等具有重要的意义。以旋转床为核心装备的超重力技术, 是气液传质过程强化的有效技术之一。经过30多年的发展, 超重力过程强化技术在基础和应用研究方面都取得了长足的进展, 特别是在受混合和传递限制的过程中得到广泛应用。本文从旋转床转子结构出发, 综述了整体旋转式、双动盘式、动静结合式等转子结构的超重力旋转床气液传质强化的研究进展和理论成果, 并展望了超重力旋转床气液强化传质的发展方向。     

引进GKN密炼机的安装与调试

介绍了青岛第二橡胶厂引进KRUPP公司GK400N/GK255N密炼机生产线安装,调试及试生产过程中的一些经验,重点介绍了GKN密炼机的优特点,以及喂料门,排料门处的改进。     

新型共流转子与啮合转子构型对混炼胶料性能的影响

本文串联式密炼机中下游转子分别采用自行研发的新型共流转子和啮合型转子,对比两种不同转子构型的混炼机理以及混炼过程,利用传统全钢子午胎胎面胶配方,设计正交试验得到不同的工艺参数进行实验研究。通过对胶料性能测试实验数据的对比分析,探究新型共流转子相对于啮合转子在串联式混炼恒温反应式下混炼对胶料性能的影响。     

Optimization of Open-end Rotor Spinning Frame Parameter and Estimation of Relevant Quality Characteristics

The high-cleaning Lyocell fibers are used to spin the Ne 32 yarns for an open-end rotor spinning frame. The optimal processing parameters were obtained in demonstrating output speed, stretching roller speed, feed speed and rotor revolution. The quality characteristics, such as yarn count, strength, elongation and Um (%), are far beyond the rating standard of the combed yarn. No yarn breaking for continuous spinning during the experimental confirmation. The result presents lower yarn breaking rate and maintains stabilized output status of spinning conditions. The back propagation neural network was employed for learning, forecast and verification of the processing parameters.     

Water‐uptake kinetics in poly(methyl methacrylate) films with a fluorescent rotor probe

A fluorescence method was adapted to measure moisture‐uptake kinetics in films of poly(methyl methacrylate), and data were interpreted in the context of a Fickian diffusion model. The films, 2–60 μm thick, were supported on acid‐etched microscope slides. They were compared with several freestanding slabs about 1 mm thick. The moisture diffusion in the slabs was Fickian with a diffusivity of 3.2 × 10^?9 cm²/s. The apparent Fickian diffusivity in the films decreased substantially with decreasing film thickness; however, a careful examination revealed that the initial moisture uptake was governed by a thickness‐independent diffusivity for a wide range of film thicknesses. This suggested that the appearance of non‐Fickian behavior originated within about a micrometer of the buried interface, possibly as a result of water accumulation beneath the film or slight thickness variations. Moisture uptake in the thickest films was more rapid than in the slabs, most likely because of residual thermal stresses. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 86: 2463–2471, 2002     

转子速率正弦变化对流体混合的影响

建立了圆形转子混合设备的二维流动有限元模型,采用网格重叠技术,利用粒子跟踪法对瞬态混炼流场进行了数值模拟,对不同相位差下的的分散混合性能、分布混合性能、线拉伸以及混合效率进行了统计和比较;分析了相位角对流体混沌混合对效率的影响,为密炼机驱动系统的新的优化方向提供了一定的理论参考。     

转子结构对离心转子式选粉机性能的影响

通过模型实验 ,研究了在不同的转子结构下各操作参数对离心转子式选粉机性能的影响 ,并分析了性能差别的原因。结果表明 ,叶片式转子的选粉机具有更好的分级性能。该研究结果为解决离心转子式选粉机实际应用中所存在的问题 ,提供了一个有效的途径