Performance behaviour of elliptical-bore journal bearings lubricated with solid granular particulates
Source abstract
Abstract
Abstract Journal bearings operating in hot environments and at high temperatures experience accelerated degradation of lubricating oils. In such situations, dry granular particulates have emerged as potential media for providing lubrication in journal bearings in place of lubricating oils. Granular particulates do not degrade thermally, even at considerably high temperatures. This work explores the static and dynamic performance characteristics of elliptical-bore journal bearings lubricated with granular particulates. It is found that a bearing lubricated with a larger size (2 μm) particles offers better performance compared with that using smaller size (1 μm) particles. Bore ellipticity reduces the load-carrying capacity and increases side leakage and the coefficient of friction; however, rotor stability is marginally improved at low eccentricity ratios ( 0.6).
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Tribology and Lubrication Engineering · Lubricants and Their Additives · Tribology and Wear Analysis
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (28)
Show source-provided references
1. An investigation of the performance of a journal bearing with a slightly irregular bore10.1016/0301-679X(92)90049-S ↗
2. On the lubrication mechanism of grain flows10.1080/10402009408983324 ↗
3. Grain flow as a fluid-mechanical phenomenon10.1017/S0022112083003419 ↗
4. The quasi-hydrodynamic mechanism of powder lubrication. Part II: Lubricant film pressure profile
5. The effect of slider geometry on the performance of a powder lubricated bearing — Theoretical considerations10.1080/10402000008982331 ↗
6. Performance of powder-lubricated journal bearings with MoS2 powder: Experimental study of thermal phenomena10.1115/1.2831282 ↗
7. Performance of a powder lubricated journal bearing with WS2 powder: Experimental study10.1115/1.2831563 ↗
8. The effect of slider geometry on the performance of a powder lubricated bearing10.1080/10402009908982264 ↗
9. High-temperature powder-lubricated dampers for gas turbine engines10.2514/3.23498 ↗
10. The basics of powder lubrication in high-temperature powder-lubricated dampers
11. Comparative evaluation of MoS2 and WS2 as powder lubricants in high speed, multi-pad journal bearings10.1115/1.2834113 ↗
12. Hirschfelder · 1954
13. A review of recent approaches for modeling solid third bodies10.1115/1.1467632 ↗
14. On the granular lubrication theory10.1098/rspa.2005.1510 ↗
15. Frictional–collisional constitutive relations for granular materials, with application to plane shearing10.1017/S0022112087000570 ↗
16. 100mm diameter self-contained solid/powder lubricated auxiliary bearing operated at 30,000rpm10.1080/10402000208982524 ↗
17. On the modeling of multi-body interaction problems in tribology10.1016/S0043-1648(96)07483-2 ↗
18. Khonsari · 2008
19. Kinetic theories for granular flow: Inelastic particulates in Couette flow and slightly inelastic particulates in a general flowfield10.1017/S0022112084000586 ↗
20. An analysis of powder lubricated slider bearings10.1115/1.2837080 ↗
21. Generalized boundary interactions for powder lubricated Couette flows10.1115/1.2831577 ↗
22. Flow characterization and performance of a powder lubricated slider bearing10.1115/1.1467634 ↗
23. The effect of perturbation amplitudes on eight force coefficients of journal bearings10.1080/10402009608983554 ↗
24. Stachowiak · 2013
25. An average lubrication equation for thin film grain flow with surface roughness effects10.1115/1.1484113 ↗
26. Characteristics of powder lubricated finite-width journal bearings: A hydrodynamic analysis10.1115/1.2162558 ↗
27. A review of dry particulate lubrication: Powder and granular10.1115/1.2647859 ↗
28. Flow characteristics of a powder lubricant sheared between parallel plates10.1115/1.555337 ↗