The present paper deals with the theoretical study of geometric imperfections of journal and its influence on the performance of capillary-compensated six-pocket hybrid journal bearing configurations with different geometric shapes of recess. The analysis includes the geometric imperfections of journal such as barrel shape, bellmouth shape, and circumferential undulations and various geometric shapes of recess (square, circular, elliptical, triangular) of same pocket area. The governing Reynolds equation is solved using Galerkin’s technique. The numerically simulated results indicate that the selection of suitable geometric shape of recess is important to have the least influence of different geometric imperfections of journal on the bearing performance.
FranchekNMChildsDW. Experimental test results for four high speed high pressure, orifice compensated hybrid bearing. ASME J Tribol1994; 116(1): 147–153.
2.
SharmaSCSinhasanRJainSC. Performance of hydrostatic/hybrid journal bearings with unconventional recess geometries. STLE Tribol Trans1998; 41(3): 375–381.
3.
SinghNSharmaSCJainSC. Performance of membrane compensated multirecess hydrostatic/hybrid flexible journal bearing system considering various recess shapes. Tribol Int2004; 37: 11–24.
4.
NicodemusERSharmaSC. A study of worn hybrid journal bearing system with different recess shapes under turbulent regimes. ASME J Tribol2010; 132: 41704–41712.
5.
NicodemusERSharmaSC. Orifice compensated multirecess hydrostatic/hybrid journal bearing system of various geometric shapes of recess operating with micropolar lubricant. Tribol Int2011; 44(3): 284–296.
6.
SharmaSCJainSCSinhasanR. Comparative study of the performance of six-pocket and four-pocket hydrostatic/hybrid flexible journal bearings. Tribol Int1995; 28(8): 531–539.
7.
WilsonDS. The effect of geometry variations on hydrodynamic bearing performance. ASLE Trans1966; 9: 411–419.
8.
MokhtarMOAAlyWYShawkiGSA. Computer-aided study of journal bearings with undulating surfaces. ASME J Tribol1984; 106(4): 468–472.
9.
MokhtarMOAAlyWYShawkiGSA. Experimental study of journal bearings with undulating journal surfaces. Tribol Int1984; 17(1): 19–24.
10.
Alderson A and Webster W. The effects of crankshaft lobing on connecting rod bearings. SAE Technical Paper 881286, 1988.
11.
ChennabasavanTSRamanR. The effects of geometric irregularities of journals on the performance of porous bearings. Proc IMechE, Part J: J Engineering Tribology1994; 208: 141–145.
12.
SharmaSCRajputAK. Effect of geometric imperfections of journal on the performance of micropolar lubricated 4-pocket hybrid journal bearing. Tribol Int2013; 60: 156–168.
13.
SinhasanRSharmaSCJainSC. Performance characteristics of an externally pressurized capillary-compensated flexible journal bearing. Tribol Int1989; 22: 283–293.
14.
ChandrawatHMSinhasanR. A study of steady state and transient performance characteristics of a flexible shell journal bearing. Tribol Int1988; 21(3): 137–148.
15.
ChandrawatHNSinhasanR. A comparison between two numerical techniques for hydrodynamic journal bearing problems. Wear1987; 119(1): 77–87.
16.
MetmanKJMuijdermantEAVanHJJ. Load capacity of multi-recess hydrostatic journal bearings at high eccentricities. Tribol Int1986; 19(1): 29–34.
17.
StoutKJRoweWB. Externally pressurized bearings—design for manufacturer part 1—journal bearing selection. Tribol Int1974; 7(3): 98–106.
18.
HoYSChenNNS. Performance characteristics of a capillary-compensated hydrostatic journal bearing. Wear1979; 52: 285–295.
19.
HoYSChenNNS. Pressure distribution in a six-pocket hydrostatic journal bearing. Wear1984; 98: 89–100.
20.
RoweWB. Advances in hydrostatic and hybrid journal bearing technology. Proc IMechE, Part C: J Mechanical Engineering Science1989; 203: 225–242.
21.
ChenCHKangYHuangCC. The influences of orifice restriction and journal eccentricity on the stability of the rigid rotor-hybrid bearing system. Tribol Int2004; 37: 227–234.
