Affiliation:
1. School of Mechatronics Engineering, Henan University of Science and Technology, Luoyang 471003, China
Abstract
Due to the coupling of the damper journal with the elastic ring and oil film, the elastic ring squeeze film damper (ERSFD) shows better dynamic performance in comparison with the traditional squeeze film damper (SFD). Therefore, a novel rigid–elastic–oil coupled mathematical model was established. The elastic ring deformation, as the key point, is solved according to the planar bending theory. Then, based on the pressure governing equation of the oil film, using the central finite difference method, the oil film pressure was addressed. Meanwhile, the Simpson method was implemented to calculate the dynamic characteristic coefficients (equivalent stiffness and damping Ce) of ERSFD (DCCEs). Also, we analyzed the influence of journal eccentricity, oil film radius clearance, flexibility coefficient and damping hole diameter on the DCCEs, and the results were compared and verified with the existing literature. The sensitivity of each parameter to the DCCEs was analyzed by using the linear regression method. According to the results, the flexibility coefficient has the greatest effect on the DCCEs, followed by the oil film radius clearance. The eccentricity of the journal and damping hole diameter have the least impact. This work will provide a theoretical basis for reflecting on the bearing dynamic characteristics more truly and accurately.
Funder
National Natural Science Foundation of China
Subject
Surfaces, Coatings and Films,Mechanical Engineering
Reference37 articles.
1. Wang, Z., Xu, N., Yu, X., Liu, Z., and Zhang, G. (2017, January 26–30). The dynamic characteristic analysis of elastic ring squeeze film damper by fluid-structure interaction approach. Proceedings of the ASME Turbo Expo 2017: Turbomachinery Technical Conference and Exposition, Charlotte, NC, USA.
2. Recent advances in nonlinear passive vibration isolators;Ibrahim;J. Sound Vib.,2008
3. Advanced designs of elastic damper supports for aircraft engine rotors;Balyakin;Russ. Aeronaut.,2015
4. Preliminary study on vibration reduction mechanism of elastic ring squeeze film damper;Cao;J. Vib. Eng.,2007
5. Experimental study on vibration reducing effect of elastic ring squeeze film damper;Zhao;J. Propuls. Technol.,2021