Numerical simulation and correction of rotor mass eccentricity for hydro-generator set

作者：Guo Tao^*; Zhang Lixiang; Yao Ji

来源：Journal of Vibration, Measurement & Diagnosis, 2012, 32(2): 244-249.

• Adjustment method
• Centerlines
• Correction method
• Dynamic balance
• Dynamic behaviors
• Dynamic characteristics
• Eccentricity
• Finite element method FEM
• Guide bearing
• Gyroscopic Effects
• Hydro generator
• Machining error
• Micro holes
• Oil film forces
• Oil films
• Processing technique
• Rotor mass
• Symmetric rotors
• Vibration

A correction method based on traditional processing techniques and modern advanced numerical simulation is used to correct the rotor eccentric caused by machining error, called the micro hole & level adjustment method. The method can effectively track the vibration and the throw at upper and lower guide bearing. It overcomes the limitation of dynamic balance on engineering which is expensive and needs restrict equipment condition. The supper effect, gyroscopic effect and the role of oil film are used for simulating the dynamic characteristics of rotor eccentric with finite element method (FEM), and the details of dynamic behaviors of the unbalance mass whose magnitude and position are effectively captured. The focus of paper is on the oil-film force and orbit of shaft centerline of guide bearing which is main vibration performance. The comparisons with symmetric rotor and the results show that the method is able to well correct the eccentricity caused by machining error.

• 出版日期2012