The Study Of The Shafting Stability For The Subcritical Steam Turbo-generator Produced

Steam turbine unit is the important equipment in the process of power generation. Its status is directly related to the level of electricity production, and the stability of the shaft system is an important aspect of the generating sets’performance, based on this, The object of the study is the shaft system’s vibration of the subcritical600MW turbine, Combined with vibration fault phenomena in the field practice, analysis and explore the influencing factors of exceptional vibration, and from the design, installation, maintenance and operation, find the methods and measures of reducing vibration to eliminate of vibration fault, guiding the security and stability of the operation purpose.Subject research results show that the turbine shaft vibration causes are the quality of shaft system imbalance, in the process of operation components touch grinding, the oil film bearing establish bad and bearing support stiffness is poorer, While to generate obvious influence of the parameters of the vibration in the operation are vacuum, lubrication temperature, sealing oil temperature, shaft seal pressure, temperature maintain level, electromagnetic, electrical abnormalities and so on. and in the process of maintenance gap adjusting and adjusting parts with valve way to work shaft vibration also has a direct impact. Thus, improving shaft stability work involved to host equipment design, installation and maintenance, We should consider from all-round, after analysis, this paper sums up the actual operation of the vibration of the more common fault reasons, and puts forward corresponding measures away vibration, the production and operation of the unit has practical significance.