Static and Dynamic Performance Characteristics of Orifice Compensated Hydrostatic Flexible Journal Bearings with Non-Newtonian Lubricants

• Published in: Tribology transactions Vol. 44; no. 2; pp. 242 - 248
• Main Authors: Sharma, Satish C., Jain, Satish C., Sinhasan, R., Sah, P. L.
• Format: Journal Article
• Language: English
• Published: Colchester Taylor & Francis Group 01.01.2001; Taylor & Francis; Taylor & Francis Inc
• Subjects: Applied sciences; Bearings, bushings, rolling bearings; Drives; Exact sciences and technology; Hydrostatic; Journal Bearing; Mechanical engineering. Machine design; Non-Newtonian; Orifice Restrictor; Static characteristic; Constitutive equation; Performance evaluation; Viscosity; Dynamic characteristic; Elasticity; Hydrostatic bearings; Lubricant; Non Newtonian flow; Deformation measurement; Shell; Three dimensional model; Nonlinearity; Reynolds equation; Journal bearing
• ISSN: 1040-2004; 1547-397X
• DOI: 10.1080/10402000108982454

The combined effect of non-Newtonian lubricant behavior and bearing shell flexibility on the performance of an orifice compensated multirecess hydrostatic/hybrid journal bearing system is studied. The analysis considers the constitutive equations for the flow of a non-Newtonian lubricant through an orifice restrictor, the generalized Reynold's equation governing the flow of lubricant having variable viscosity and 3-D elasticity equations. The computed results demonstrate that loss in bearing performance due to the pseudo-plastic effect of the non-Newtonian lubricant can be mitigated by a proper selection of parameters such as the deformation coefficient (Ȼ 4 ) and non-linearity factor ([Kbar]) or power law index (n).