Calculation of fluid pivot of tilting pad journal bearing

The article presents a description of the design and the results of numerical studies of static features of a single pad of the fluid pivot tilting pad journal bearing. The authors describe a system of equations for the non-isothermal flow of lubricant in a hydrodynamic lubricant film; the conditions for the transition of the pad to an equilibrium mode; the flow of lubricating fluid in a hydrostatic recess. Moreover, the change in the pressure of the lubricant film along the length of the pads is illustrated depending on the magnitude of the relative eccentricity. Therefore, the features of the bearing operation mode are determined, in which a complete or unilateral “ascent” of the pad is observed.

1. Schnepp V. B. Konstruktsiya i raschet tsentrobezhnykh kompressornykh mashin [Design and calculation of centrifugal compressor machines]. Moscow, 1995. 240 p. ISBN 5-217-01196-3. (In Russ.).

2. Martsinkovsky V. S., Yurko V. I. Sovershenstvovaniye konstruktsii radial’nykh dempfernykh podshipnikov s vkladyshami na gidrostaticheskom podvese [Improvement of the design of damper fluid pivot journal bearings]. Proizvoditeli i potrebiteli kompressornoy tekhniki. Manufacturers and Consumers of Compressor Equipment. Kazan, 2010. P. 248–259. ISBN 978-5-98356-099-4. EDN: QMKYRP. (In Russ.).

3. USA Patent no. 3549215. Hydrostatically supported tilting pad journal bearing. L. W. Hollingsworth. Filled at 21.10.1968. Patented at 22.12.1970.

4. Nelson D. V., Hollingsworth L. W. The fluid pivot journal bearing. ASME. Journal of Lubrication Technology. 1977. Vol. 99. P. 122–127. DOI: 10.1115/1.3452958.

5. Khamidullin I. V. Issledovaniye i raschet opornykh podshipnikov skol’zheniya s samoustanavlivayushchimisya podushkami tsentrobezhnykh kompressorov [Investigation and calculation of tilting pad journal bearings of centrifugal compressors]. Leningrad, 1983. 18 p. (In Russ.).

6. Maksimov V. A., Batkis G. S. Vysokoskorostnye opory skol'zheniya gidrodinamicheskogo treniya [High-speed fluid film bearings of hydrodynamic friction]. Kazan, 2004. 406 p. ISBN 978-5-93165-081-7. (In Russ.).

7. Lou M., Bareille O., Chen W. [et al.]. Experimental and numerical investigation on the performance of fluid pivot journal bearing in one-side floating state. Tribology International. 2019. Vol. 138. P. 353–364.

8. Nguyen T. V., Li W. Numerical investigation of dynamic and hydrodynamic characteristics of the pad in the fluid pivot journal bearing. Proceedings of the Institution of Mechanical Engineers, Part J. 2021. Vol. 236, no. 5. P. 1008–1019. DOI: 10.1177/13506501211033045.

9. Nikitin G. A. Shchelevye i labirintnye uplotneniya gidroagregatov [Slot and labyrinth seals of hydraulic units]. Moscow, 1982. 135 p. (In Russ.).

10. Khadiev M. B., Khamidullin I. V. Kompressory v tekhnologicheskikh protsessakh. Raschet podshipnikov skol’zheniya tsentrobezhnykh i vintovykh kompressorov: monografiya [Compressors in technological processes. Calculation of fluid film bearings of centrifugal and screw compressors]. Kazan, 2021. 260 p. ISBN 978-5-7882-3004-7. (In Russ.).

11. Nguyen T. V., Li W. Floating conditions of the pads in fluid pivot journal bearing. Preprint (Version 1). 2020. DOI: 10.21203/rs.3.rs-36101/v1.