Optimum Design of Damper Bearing for Cylindrical Bearing-Rotor System

• Published in: Transactions of the Japan Society of Mechanical Engineers Series C Vol. 57; no. 540; pp. 2696 - 2702
• Main Authors: Kikuchi, Katsuaki, Yoshioka, Masahiro
• Format: Journal Article
• Language: Japanese
• Published: The Japan Society of Mechanical Engineers 25.08.1991
• Subjects: Bealing; Cylindrical Bearing; Damper; Design Engineering; viblation of Rotating body; Vibration Control
• ISSN: 0387-5024; 1884-8354
• DOI: 10.1299/kikaic.57.2696

The vibration control effect of damper bearings is analyzed by a new analysis method that does not need to solve complex inherent values for the single-disk flexible rotor supported by cylindrical bearings. The following assertions can be made: (1) In order to improve the vibration response of damper bearings at the critical speeds, the viblation response of the main bearing must be improved. (2) Increase in the dimensionless shaft stiffness coefficient Ks spreads the region of Q ≤ 8 in the map of Q-factors. (3) The dimensionless system number Wb has the optimum value that spreads mostly throughout the region of Q ≤ 8 in the map of Q-factors, and the value is 0.2∼1.0. (4) In the optimum design of damper bearings, the design needs to consider the region near Kb = 0.1 and Da = 0.2 (Kb: stiffness ratio, Da: dammping ratio) in Q-factors map, where the value of the Q-factor is below 2 in the region.