调压室计算软件

为防止过高的压力从压力水管传播到引水隧洞中，引水式电站通常设置调压室。调压室的设计较为复杂，必须妥善解决其尺寸大小与运行的关系，以及施工与维修的关系。阐述引水式水电站利用计算机对调压室进行稳定分析、形状确定及调压室的尺寸计算。对该计算软件的理论基础、数据输入以及计算步骤作了介绍。     

水轮机更新改造的经验教训

美国西雅图城市电灯公司１９８７年开始对使用年代久远的１６台水轮机进行更新改造，并按水轮机损坏的严重程度和在系统中的重要性进行排序修复。叙述计划中的主要电站乔治电站、西达瀑布电站、地亚波罗电站水轮机更新改造的经验教训。     

大型直流电机关键部位绝缘结构和工艺的分析(摘要)

本文在吸收国内外先进技术的基础上对大型直流电机关键部位的绝缘结构及工艺作了分析,着重描述了主极铁芯对地绝缘的绕包工艺、单面补强少胶粉云母箔在电枢线圈对地绝缘上卷包工艺的应用,电枢真空压力浸漆(VPI)后采用旋转烘焙工艺的优越性,浇铸涂封树脂工艺在换向器上的应用以及电机裸露部位采用静电粉末喷涂(EPC)工艺的推广应     

TEOS-化学液相沉积法改性ZSM-5催化剂上的高选择性甲苯择形歧化反应

Shape-selective catalysts for the disproportionation of toluene were prepared by the modification of the cylinder-shaped ZSM-5 zeolite extrudates with chemical liquid deposition with TEOS (tetraethyl orthosilicate).Various parameters for preparing catalysts were changed to investigate the suitable conditions.The resulting cata-lysts were tested in a pressured fixed bed reactor and characterized by SEM (scanning electron microscopy).The conversion of toluene and para-xylene selectivity were influenced remarkably by the n(SiO2)/n(Al2O3) ratio of ZSM-5 zeolite,the type and amount of deposition agent,acid and solvent used,and the time and cycle of deposition treatment.TEOS was proved to be a more efficient agent than the conventional polysiloxanes when the deposition amount was low.The catalyst prepared at the suitable conditions exhibited a high para-xylene selectivity of 91.1% with considerable high conversion of 25.6%.SEM analyses confirmed the formation of a layer of amorphous silica on the external surface of ZSM-5 zeolie crystals,which was responsible for the highly enhanced shape-selectivity.