Journal
TRIBOLOGY INTERNATIONAL
Volume 157, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.triboint.2021.106881
Keywords
Frequency response; Bearing stiffness; Heat generation; Thermal expansion
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Funding
- National R&D Program through the National Research Foundation of Korea (NRF) - Ministry of Science and ICT [2020M3H4A3106236]
- National Research Foundation of Korea [2020M3H4A3106236] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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This paper discusses the thermal effects on bearing stiffness and natural frequencies of a high-speed spindle system. Experimental and numerical analysis showed that the third natural frequencies decreased with increasing temperature. The simulated results were in good agreement with the experimentation.
This paper discusses thermal effects on bearing stiffness, and consequently, the natural frequencies of a highspeed spindle system. Heat is generated due to friction torque at the contacts between the raceways and the balls of the angular contact ball bearings. In our experimental spindle system, the heat sources included six bearings and a built-in motor. Five-by-five bearing stiffness matrices were computed based on the thermal mechanical parameters. The stiffness matrices were used as inputs for a finite element model generated in the ANSYS Workbench environment, in which the bearings were simulated as bushing joints, to compute frequency response numerically. The simulated results showed that the third natural frequencies decreased with increasing temperature and were in good agreement with the experimentation.
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