PI系统在设备状态分析中的应用

PI系统是国华准电SIS的核心模块和技术平台,通过该系统可实现对机组生产流程和设备运行状态的实时监控,例如:通过生产日报表为各级管理人员提供信息;借助PI-Processbook与PI-Datalink 2个功能模块快速判断给水泵勺位偏差大等设备异常问题,统计锅炉再热器超温次数及时间,显示汽轮机各瓦瓦温及轴振异常数据等。实践证明,PI系统在国华准电的设备状态监测及分析中起着重要作用,从而为该系统在设备状态分析方面的应用提供依据。     

1000MW机组动调风机故障诊断及处理

我厂两台1000MW机组采用的是上海鼓风机厂生产的PAF20-13．3-2型一次风机以及FAF26．6-14—1型送风机,均为动叶可调式轴流风机。液压调节系统是动叶调整式轴流风机的重系统之一,主包括动叶组件、液压油缸、风机传动臂、伺服马达、液压油系统等附属设备。液压调节系统故障是引起风机振动的主因素,本文通过介绍动调式轴流风机动叶调节的原理,对动调风机易发生的故障原因进行分析来说明相应故障的处理措施。     

立体生态景观的适应性重构 ——山地城市河流护岸草本植物群落生态种植

Plant communities in mountainous cities play significant roles in revetment protection, sediment interception, water purification, ecological buffer, biodiversity conservation, and landscape quality improvement. Meanwhile, the local complex hydrologic conditions may pose adversity stress to the structure, function, and ecological process of these plant communities. This paper introduces the restoration practices of river revetments in the Jiulong Waitan section of Chongqing employing ecological planting strategies. First, a technical framework was proposed for the re-establishment of riparian herbaceous communities as the multilayered semi-natural meadows that were planted by strips and zones upon hydrologic conditions. Second, principles and modes of these ecological planting practices were elaborated. Third, an evaluation on the communities’ performance indicated that they could adapt to the complex hydrological conditions in mountainous cities, including sharp rise and fall of river level during summer floods, high temperature, and storm runoff. This study may provide a scientific reference for riverfront landscape optimization of the main stream of the Yangtze River, and a paradigm for the ecological conservation and the establishment of ecological barrier for the upper reaches.     

长轴类工件定位调节器

一般长轴毛坯件不能直接利用中心架打中心孔。以往利用钻床或手电钻预先打一中心孔,这样加工的中心孔偏斜严重,而且,即使利用这种中心孔加工出中心架位置后,还要利用中心架架住工件重新平端面打中心孔。需要反复两次,很麻烦。采用定位调节器可以省去预打中心孔这一工序,且调整方便,定位准确。对于有些加工余量小的工件     

定位调节器

采用定位调节器加工长轴类工件,可省去用钻床或手电钻打中心孔这一工序,对加工余量小的工件更为实用。使用时将调节器套在工件端部,调节螺钉,压紧工件。装央     

基于生物多样性保育的采煤塌陷区生态修复模式

以山东省兖州煤田邹城市太平采煤塌陷区为例,在多年调查研究基础上,分析太平采煤塌陷区新生湿地生物多样性特征及变化趋势,结合动态塌陷特点,重点针对生物多样性保护,探索基于自然的解决方案、以塌陷区新生湿地生物多样性保育为核心的生态修复技术.从生态系统整体设计与修复的角度,提出了6种基于生物多样性保育的采煤塌陷区生态修复模式,...