Analysis of unbalanced response for coupled double-rotor spindle system of high speed grinder

作者：Li Changhe^*; Wang Sheng; Ding Yucheng

来源：Key Engineering Materials, 2012, 522: 383-387.

DOI：10.4028/www.scientific.net/KEM.522.383

• Critical speed
• Different speed
• First-order
• Front end
• Moment balance
• Numerical results
• Rotate speed
• Rotor dynamic
• Spindle systems
• State vector
• Theoretical modeling
• Theoretical models
• Transition matrices
• Unbalance response
• Unbalanced response
• Vibration amplitude

This study was focused on the theoretical modeling and numerical simulation about the unbalanced response for coupled double-rotor spindle system of high speed grinder. Based on the rotor dynamics, a theoretical model was established using the transfer matrix method. The moment balance equations, and the transition matrix, the state vector, field matrix of coupled double-rotor spindle system of high speed grinder were analyzed and calculated. The numerical results showed that the amplitude of unbalance response increased by the same multiple as that of the amount of unbalance at different locations and at different speeds. Furthermore, the position most sensitive to the unbalance was the front end of rotor 2, followed by the middle and back end of rotor 2. Rotor 2 was especially sensitive to unbalance. Moreover, the vibration amplitudes of the front end, front and back bearings of rotor 1 increased in response to unbalanced increase of rotate speed. The vibration amplitude abruptly increased at 17500r/min corresponding to first-order critical speed.

• 出版日期2012