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- Title
Experimental studies on the effects of bearing supply gas pressure on the response of a permanent magnet disk-type motor rotor.
- Authors
Han, Dongjiang; Tang, Changliang; Hao, Long; Yang, Jinfu
- Abstract
Vibrations, particularly low-frequency vibrations caused by self-excited gas films, significantly affect the safety and economy of turbomachinery, which becomes dangerous at high rotational speeds. This experimental study focuses on the dynamic characteristics of a Permanent magnet (PM) disk-type motor rotor supported by gas aerostatic bearings. Nonlinear dynamic behavior, including double low frequency and gas film half whirling, was analyzed in the experiments. The dynamic features of double low frequency and gas whirling are described in the paper. The most important finding is that the sum of the whirling ratios of low frequencies 1 and 2 is always 1.00. The occurrence mechanism requires further study. The effects of bearing supply gas pressure on the dynamic response characteristics of the multi-disk PM rotor are implemented to improve rotor stability.
- Subjects
TURBOMACHINES -- Bearings; GAS-lubricated bearings; AEROSTATICS; PERMANENT magnet motors; ROTOR bearings
- Publication
Journal of Mechanical Science & Technology, 2016, Vol 30, Issue 11, p4887
- ISSN
1738-494X
- Publication type
Article
- DOI
10.1007/s12206-016-1008-6