Abstract
The present paper deals with a theoretical analysis of 4-pocket capillary compensated conical hybrid journal bearing system operating with micropolar lubricant. The modified Reynolds equation for a conical journal bearing system operating with micropolar lubricant has been derived. In the present study, Eringen's micropolar theory has been used to model micropolar lubrication in cylindrical coordinate system. The study has been carried out for the different values of micropolar parameters, that is, characteristic length () and coupling number (). The conical bearing configurations having semicone angle 10∘, 20∘, 30∘, and 40∘ have been studied. The study suggests that micropolar lubricant offers better performance vis- á-vis Newtonian lubricant for bearing configurations having values of semicone angle 10∘and 20∘.
Highlights
The noncircular journal bearings such as lobed bearing, pressure dam bearing, and conical journal bearing provide better performance than that of the circular journal bearings for different considerations
The influence of micropolar lubricant on the bearing performance characteristics has been presented with respect to the external radial load (Wr) as shown through Figures 5(a)–12(a)
An analytical study of a 4-pocket capillary compensated hybrid conical journal bearing system operating with micropolar lubricant has been carried out
Summary
The noncircular journal bearings such as lobed bearing, pressure dam bearing, and conical journal bearing provide better performance than that of the circular journal bearings for different considerations. Conical journal bearing system can support both radial and axial load within less space visa-vis different combinations of circular journal and rotary thrust bearing. These bearings are more economical for the machining point of view [1, 2]. Prabhu and Ganesan [4, 6, 7] analyzed the dynamic stiffness characteristics of capillary compensated annular recess conical hydrostatic thrust bearings. In their study, they discussed the conditions of tilt, eccentricity, and rotation. Srinivasan and Prabhu [5] studied the steady state performance of externally pressurized gas-lubricant conical bearings under rotation
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