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Vibration Analysis and Control of the Turbine Unit

Author: LiuQing
Tutor: LinYing；HuangFeiZhou
School: South China University of Technology
Course: Mechanical Engineering
Keywords: Steam Turbine Vibration Analysis Control Balance
CLC: TM621
Type: Master's thesis
Year: 2009
Downloads: 89
Quote: 0
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Abstract


Steam Turbine is a major key equipment of the electric power industry . Steam Turbine running reliability , largely by the state of vibration of the unit is determined . Unit defects excessive vibration , the vibrating force , the connection between the various components of the units will loosen , thereby weakening the connection between the cylinder , bearing housing, the base platen and foundation stiffness , stiffness reduction in turn will exacerbated the vibration of the unit . Vibration intensified friction or bite might rotating parts and stationary parts , resulting in unit severely damaged and forced to shut down . Some parts of the turbine , such as bearing tungsten gold and base in the long-term effects of the mutations stress cracks . The vibration can also result in damaged equipment and building of the foundation and around the resonance occurs . Vibration caused by the noise of the running staff feel tired and easily fatigued . Therefore , the time to identify the causes of vibration , to take the necessary measures to reduce the vibration level is essential for the safe operation of the turbine generator premise . Vibration monitoring and fault diagnosis in a power plant 25MW units and engineering background , starting from the analysis of typical vibration faults and Steam Turbine common characteristics of rotor imbalance Rubbing , the asynchronous vibration , rotor misalignment, typical failure and the characteristics of the systems analysis, research and analysis of vibration analysis and comprehensive analysis of the basic failure analysis methods . On this basis , focusing on the analysis of the introduction and application of the composition of the vibration test systems and VMS-04B vibration monitoring and analysis and balance system . Applying the principle of vibration diagnosis early fault detection and diagnosis of steam turbine field is a core part of this paper , the article accurately determine the blade fracture failure according to the characteristics of vibration burst spectrum vibration fault of Steam Turbine Blade Fracture Analysis and control ; against the phenomenon of the generator air temperature affect the unit amplitude Steam Turbine hot unbalanced fault analysis and treatment , and ultimately to eliminate vibration , to ensure the normal operation of the steam turbine unit . The results prove that the vibration test and analysis system and related methods of dealing with the validity of the vibration fault , therefore , the subject of research with theoretical and practical significance .

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CLC: > Industrial Technology > Electrotechnical > Power generation, power plants > Power plant > Thermal power plants, thermal power stations
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