单级离心泵的安装与润滑

对单级离心泵的安装和轴承润滑所存在的问题进行了分析 ,提出了改进措施 ,以便达到增产降耗、提高离心泵使用寿命的目的     

小尺寸装药爆轰在有机玻璃隔板中的衰减规律

利用锰铜压阻传感器法测量了某聚奥传爆药在不同直径下的小尺寸装药爆轰输出冲击波经不同厚度有机玻璃隔板衰减后的冲击波压力,通过对实验数据进行拟合,得到了有机玻璃介质中冲击波衰减系数与装药直径的指数型关系.实验中传爆药装药密度为90%的理论密度,约束条件分45#钢和有机玻璃两种,装药直径为1.5 mm、3 mm、5 mm和8 mm.结果表明: 衰减系数随装药直径增大而减小,装药的约束条件越弱,这种变化越明显.     

Electrothermal energy conversion mechanism of micro-scale semiconductor bridge

The response characteristics of resistance is observed by the analysis of experimental data of micro-scale semiconductor bridge(MSCB)under different voltage inputs.Two critical voltages are found.One is called exploding voltage,above which the MSCB can be melted and vaporized without generating a plasma,and the other is called producing a plasma voltage,above which the MSCB is entirely vaporized,and then the current flows through the vapor producing the plasma.Based on the non-Fourier heat conduction theory,the electrothermal energy conversion model is established for the stage from heating to exploding,and then the correlation of MSCB and time is obtained by graphic calculation.Importantly,the critical exploding voltage and exploding time are also derivate.With the comparison between the analytical result from the theoretical model and that from experimental data,it has been demonstrated that the theoretical model is reasonable and feasible for designing the exploding voltage and exploding time.     

压力容器及管道带压补漏操作技术

压力容器和压力管道在生产过程中会出现泄漏，这必将会对生产过程产生影响。因此，带压堵漏就成为保证生产正常进行的一种必要技术手段。介绍了手工电弧焊带压堵漏的常用方法。     

装药直径和约束条件对小直径装药爆速影响研究

采用探针法测试了不同条件下小直径装药的爆速,得出了某传爆药在45#钢约束条件或有机玻璃约束条件下小直径装药爆速与装药直径的经验关系式。结果表明小直径装药爆速随着装药直径和约束阻抗的增大而增大。随着装药直径增大,装药尺寸和约束条件对爆速的影响逐渐减小。在装药密度一定时,可以通过调整约束条件和装药直径控制爆速满足不同需求。