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Influence of Varnish on Bearing Performance and Vibration of Rotating Machinery
Joint Authors
Zhang, Chu
Yang, Jian-Gang
Liu, Shi
Gao, Qing-Shui
Yang, Yi
Source
International Journal of Rotating Machinery
Issue
Vol. 2017, Issue 2017 (31 Dec. 2017), pp.1-10, 10 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2017-10-19
Country of Publication
Egypt
No. of Pages
10
Main Subjects
Abstract EN
Varnish is a kind of fouling adhered on bearing inner face near the load zone.
The model to analyze its influence on bearing performance and rotor vibration was set up.
Pressure and temperature distribution were solved on the basis of the Reynolds equation by the iteration method simultaneously.
It is found that bearing performance is changed by the step flow effect at the leading edge of the varnish.
Its influence is more obvious when the rotating speed is low.
Bearing varnish results in a large decrease of minimum clearance and an increase in the oil film temperature and pressure.
Loading capacity of bearing is also decreased.
It is harmful to the bearing.
With the varnish, the minimum oil film thickness decreases.
This leads to an increase of bearing stiffness and damping coefficients.
Its influence is larger in the horizontal direction than that in the vertical direction.
The trend of unbalance response to rotating speed is similar.
There is little influence of the varnish on the modal frequency.
However, system stability is improved due to the increased bearing damping coefficients.
American Psychological Association (APA)
Zhang, Chu& Yang, Jian-Gang& Liu, Shi& Gao, Qing-Shui& Yang, Yi. 2017. Influence of Varnish on Bearing Performance and Vibration of Rotating Machinery. International Journal of Rotating Machinery،Vol. 2017, no. 2017, pp.1-10.
https://search.emarefa.net/detail/BIM-1169626
Modern Language Association (MLA)
Zhang, Chu…[et al.]. Influence of Varnish on Bearing Performance and Vibration of Rotating Machinery. International Journal of Rotating Machinery No. 2017 (2017), pp.1-10.
https://search.emarefa.net/detail/BIM-1169626
American Medical Association (AMA)
Zhang, Chu& Yang, Jian-Gang& Liu, Shi& Gao, Qing-Shui& Yang, Yi. Influence of Varnish on Bearing Performance and Vibration of Rotating Machinery. International Journal of Rotating Machinery. 2017. Vol. 2017, no. 2017, pp.1-10.
https://search.emarefa.net/detail/BIM-1169626
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1169626