Dynamic Characteristics of Sealed Squeeze Film Damper With a Central Feeding Groove
Author:
Kim Keun-Joo1, Lee Chong-Won1
Affiliation:
1. Center for Noise and Vibration Control (NOVIC), Department of Mechanical Engineering KAIST, Science Town, Daejeon, 305-701, Korea
Abstract
In this paper, the dynamic characteristics of an oil-lubricated, sealed squeeze film damper (SFD) with a central feeding groove are analytically derived based on an enhanced dynamic pressure field analysis, accounting for the effect of the seal and feeding grooves, and its validity is experimentally verified. A test rig using an active magnetic bearing system as an exciter is introduced to identify the dynamic characteristics of SFDs with high accuracy and efficiency. Experiments are conducted with the seal gap varied, in order to investigate its effect on the dynamic characteristics of the SFD. The estimated and analytical damping and inertia coefficients for the sealed SFD with a groove are compared and it is found that the pressure field analysis, when neglecting the effect of the seal groove, tends to far underestimate the SFD dynamic coefficients.
Publisher
ASME International
Subject
Surfaces, Coatings and Films,Surfaces and Interfaces,Mechanical Engineering,Mechanics of Materials
Reference22 articles.
1. Zeidan, F. Y., San Andre´s, L., and Vance, J. M., 1996, “Design and Application of Squeeze Film Dampers in Rotating Machinery,” Proceedings of the 25th Turbomachinery Symposium, pp. 169–188. 2. Zeidan, F. Y.
, 1995, “Application of Squeeze Film Dampers,” Turbomach. Int., 36, pp. 50–53. 3. Mohan, S., and Hahn, E. J., 1974, “Design of Squeeze Film Damper Supports for Rigid Rotors,” ASME J. Eng. Ind., 96, pp. 976–982. 4. Gunter, E. J., Barrett, L. E., and Allaire, P. E., 1977, “Design of Nonlinear Squeeze-Film Dampers for Aircraft Engines,” ASME J. Lubr. Technol., 99, pp. 57–64. 5. Rabinowitz, M. D., and Hahn, E. J., 1977, “Stability of Squeeze-Film-Damper Supported Flexible Rotors,” ASME J. Eng. Power, 99, pp. 545–551.
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