Large Air-cooled Turbine Generator Vibration Problems

With the rapid development of our national economy and electrical industry,the market requirement of large air-cooled turbogenerator is increasing continually ,and so is the single-unit capacity of air-cooled turbogenerator . The most difficult problem of increasing the single-unit capacity of air-cooled turbogenerator is how to control the vibration..With the. object of large air-cooled turbogenerator applicated technology of Co.ALSTOM.,research large air-cooled turbogenerator, futher from theory and practice.First summarize each vibration problem of large air-cooled turbogenerator, analyse and summarize former physical model, theory base and method of analysis.Then introduce the structure of WX series large air-cooled turbogenerator. Establish double shell model by particular hanging spring structure of WX25R-127 330MW large air-cooled turbogenerator stator.Analyse the affect of angular rigidity of spring system to inhere frequency of stator and inhere frequency of the shell in different boundary.Last analyse the affect of electromagnetism angular rigidity to inhere frequency of stator system by electromagnetism angular rigidity expression.By the research of this subject ,the important theoretic bases have been provided for the development of large-capacity air-cooled turbogenerator in this factory ,and the meaning of the research on the vibration counteraction of large-capacity air-cooled turbogenerator in our country has been more abundant.The vibration counteraction technology researched in this paper has realistic directive significance for this factory to develop air-cooled turbogenerator with larger capacity ,its adoption has remarkably improved the level of development and manufacture of large-capacity air-cooled turbogenerator in this factory ,thereby has further improved the posseeesd rate in market of its large-capacity air-cooled turbogenerator .This vibration counteraction technology has well economic benefit and social benefit ,and it can be extend to the whole trade of air-cooled turbogenerator ,so as to reduce the technical difference between our country and other ones .