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Restrictor-based studies of hybrid hole-entry conical journal bearings

Prashant G. Khakse (Maintenance Training Organization, Air India Engineering Services Limited, Mumbai, India)
Vikas M. Phalle (Department of Mechanical Engineering, Veermata Jijabai Technological Institute, Mumbai, India)

Industrial Lubrication and Tribology

ISSN: 0036-8792

Article publication date: 9 June 2021

Issue publication date: 3 August 2021




This paper aims to describe how successfully a particular restrictor delivers its best in increasing the conical journal bearing performance. The restrictors are used in the hole-entry conical journal bearing subjected to hybrid mode. Thus, the restrictors, like constant flow valve (CFV), orifice and capillary, are studied comparatively.


Numerical simulation for the bearing results with the three restrictors are obtained by using finite element method (FEM) under the well-known modified Reynolds equation.


When the hole-entry conical journal bearings, with the restrictor design parameter range C¯s2 = 0.03 – 0.09, are operated, the results obtained are quite distinctive and significant. It indicates that the CFV restrictor-based conical bearing gives enhanced performance in comparison to orifice and capillary restrictors. Moreover, it suggests the performance-wise sequence of the restrictors in hybrid bearings as CFV > Orifice > Capillary.


The outcome of the research paper will give insight to help the bearing designer to choose the particular restrictor in hybrid conical bearing depending on the industrial need.



Author acknowledges the support and guidance provided by V.M. Phalle, Mechanical Engineering Dept. VJTI, Mumbai.


Khakse, P.G. and Phalle, V.M. (2021), "Restrictor-based studies of hybrid hole-entry conical journal bearings", Industrial Lubrication and Tribology, Vol. 73 No. 5, pp. 708-717.



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