反应注射成型设备混合系统的类型与性能

介绍了反应注射成型设备的撞击混合式、旋转混合式以及旋转Kenics混合器等混合系统的结构特点。

旋转磨料射流除锈实验研究

采用锈蚀钢板为试件,进行前混合式旋转磨料射流清洗试验.找出了喷嘴出口段长度、喷距、叶片导向角、叶轮长度等参数对清洗效果的影响规律.确定了旋转磨料射流进行表面清洗的压力应用范围为(1.5 ～ 8)MPa.

基于ANSYS的新型步进电机的齿层优化

为了得到最佳的齿层比例,根据一种新型混合式直线旋转步进电机的结构,建立电机的3D齿层模型,通过改变电机直线段和旋转段齿层的齿宽、齿高和气隙,分别进行ANSYS仿真,使同齿距下的磁感应密度达到最大;再对优化结构进行2D模型验证;在一定程度上可以验证电机整体设计的合理性。

新型二自由度电机的磁路模型研究

提出了一种新型混合式直线旋转步进电动机的结构,通过分析电机结构分析在不同励磁电流下电机旋转段和直线段的工作原理。依此工作原理为基础,建立电机的等效磁路网络模型。以一相绕组通电为例,对该步进电动机全网络进行了线性解析,进而给出了该电机的转矩特性解析式。

Ability of rotary compactor in compacting consistent slabs and effect of rotary compaction on engineering properties of stone mastic asphalt mixtures

A new automatic rotary compactor and its abilities in compacting stone mastic asphalt （SMA） are presented. Following an overview of the rotary compactor and the compaction procedure, it is demonstrated that the rotary compactor is able to produce uniform slabs with the desired thickness of 65 mm all over around. Furthermore, 132 cored samples from the rotary compactor had been compacted uniformly with approximately 4% optimum air void content. In addition, performance tests results indicate that the rotary compactor produces asphalt mixturures with the requirements of resilient modulus, Marshall stability and flow. A weight factor was introduced for each fraction of aggregates in the degradation analysis to compensate the crushing effect of aggregates during mixing and compacting.