Comparison of static performance characteristics ofud3-Axial groove water lubricated journal bearings:udReynolds and JFO models

摘要

The steady state characteristics of water lubricatedudjournal bearings having multiple axial grooves areudobtained theoretically. The novelty of theseudbearings is that the lubricant (water) is fed underudpressure from one end of the bearing, through theudmultiple axial grooves (groove angles may vary).udThese bearings can use the process fluid as theudlubricant, as in the case of feed water pumps.udThe Reynolds equation is solved numerically by theudfinite difference method satisfying the Jacobsson-udFloberg-Olsson boundary conditions.udExperimental results indicate that the pressureudremains constant for a major portion of theudgroove, while theory predicts a linear pressureuddrop from inlet to exit. Comparison of loadudcapacity, attitude angle, volume flow rate andudfriction variable for various bearing number andudeccentricity ratios, assuming linear pressure dropudalong the groove, shows that there is a significantuddifference between those obtained by the Reynoldsudmodel and the Jacobsson-Floberg-Olsson model.udThe Jacobsson-Floberg-Olsson model takes intoudaccount continuity of flow at both cavitation andudreformation boundaries and therefore gives audbetter prediction of bearing characteristics.