STUDY OF THE DYNAMICS OF SPINDLE SHAFT ON GAS-STATIC BEARINGS
DOI:
https://doi.org/10.18372/0370-2197.1(102).18433Keywords:
spindle dynamics, gas-static bearings, natural frequencies, computationAbstract
This study delves into the complex dynamics of spindle shafts mounted on gas-static bearings, employing computational experiments and analysis to reveal crucial insights for optimizing high-precision machining processes. We identify natural frequencies and resonant tendencies of spindle vibrations through advanced Finite Element Method (FEM) simulations, highlighting their impact on operational stability and machining quality. Deliberately introduced imbalances further illuminate the dynamic behavior, displaying the detrimental effects of resonance on spindle performance. To mitigate these effects, we explore various technical solutions, including reducing rotor imbalances and intensifying acceleration through critical regions. Ultimately, this investigation provides a comprehensive understanding of spindle dynamics on gas-static bearings, guiding the development of robust and high-precision spindles for a range of industrial applications beyond just machining, such as precision robotics and microfabrication.
References
Zhang H., et al. (2016). High-speed electro-spindle running on air bearings: Design and experimental verification. International Journal of Mechanical Sciences. 87: 9-18.
Breshev O.V. (2019). Modernization of a single-bearing contactless drive to improve its technical characteristics. Newsletter of the Eastern Ukrainian National University named after V. Dahl, 17 (206): 15-21.
Childs B. (2019). Rotor dynamics for gas-lubricated turbomachinery. Cambridge University Press.
Wang Z., et al. (2023). Development of a high-speed air-bearing spindle using one-directional porous bearing. Journal of Mechanical Science and Technology. 37(9): 1707-1716.
Pat. 98084 Ukraine, IPC F16C 32/06 (2006. 01). Spindle assembly with gas supports. Nosko P.L., Breshev V.E., Breshev O.V. Applicant and patent holder Eastern Ukrainian National University after V. Dahl. No. a201106472. Application 05.23.11; publ. 04/10/12, Bulletin. No. 7.
Yang J., et al. (2019). Modeling and analysis of a high-speed spindle with hybrid bearings considering the influence of bearing parameters. Mechanical Systems and Signal Processing. 130: 262-279.
Wu J., et al. (2023). Active balancing control of a high-speed aerostatic spindle using piezoelectric actuators. Mechanical Systems and Signal Processing. 189: 109903.
Nelson H.D. (1976) The dynamics of rotor bearing systems using finite elements. Journal of Engineering for Industry. Vol. 98: 593-600.
Genta G. (2009) Vibration Dynamics and Control. Springer Science and Madia Business Media, LLC: 855.
