某1000 MW超超临界机组配备的3台凝结水泵,在机组分部试运期间轴承相继严重损坏。通过对几台凝结水泵运行、结构、设计计算方面的分析,最终判断造成该故障的原因是凝结水泵工频改为变频运行后,在低转速下,轴承油位在正常水平时无法将足够的润滑油供送到轴承处,造成轴承润滑不足,进而导致轴承烧毁。在采取制订提高轴承油位、限制凝结水泵最低转速的措施后,这几台凝结水泵恢复正常运行。

In order to meet the information needs of geological data users,this paper,by using complex network theory,defines the concept of geological data information entity,constructs the complex network of geological data information entity,and put forward geological data information service model based on the complex network.To validate the model,this paper collects 513 geological data from National Geological Archives of China,chooses the applicable information entities,and construct the complex network of geological data according to the simulative user needs with the analysis results as feedback to the user.The results show that this model can provide the corresponding information service from vast geological data according to user needs.

During the adjustment and test running,large-scale steam turbine units have various problems inevitably.Through the adjustment and test running work,thoroughly analyse and ultimately solve the problems impacting of the security,stability and economy of the units. Not only for the transfer and pre-production of units lay a solid foundation,so the power generation companies can make considerable economic benefits,also discover relevant companies own improve space in installation,production or design of products.

During the whole process of integrated commissioning stage of Zhengzhou Gas Power Plant which installed with 2×390 MW(Siemens GUD1S.94.3A) Gas-Steam Combined Cycle Units,there are lots of commissioning works,such as GT ignition & start-up,synchronizing,blowing of HRSG,safety valve setting,GT high load adjust and test,ST startup and running with load,combined cycle full load test and reliability test,etc.have been executed successively.The abnormal shutdown events occurred in commissioning are analyzed in the article to avoid any duplication of similar in the future and lay the good foundation for units commissioning hereafter.

The mechanism of action, common variety of silane coupling agent and its application in coatings were introduced. The production and market situation of silane coupling agent in China were briefed also. In 2004, the production capacity of China’s silane coupling agent was about 10 thousand tons per year, and the output was 8 thousand tons. It was forecasted that the production capacity would reach 20 thousand tons per year by the end of 2010. Finally, the development trend of China’s silane coupling agent in coatings was analyzed.