Studying the Effect of Load Direction Variation on the Performance of Three Tilted Pads Journal Bearing
Article Sidebar
Main Article Content
Abstract
This research studied, theoretically, the performance of a tilted pad journal bearing. This bearing consists three inclined pads. These pads are distributed circumferentially around the journal. These pads can be adjusted in two ways: by changing the tilt angle of each pad _and by changing the circumferential position of the pads around the journal, relative to the external load direction, in order to obtain the following goals: (1) Maximum external load, (2) Maximum oil flow rate in order to carry out as much heat as possible, (3) Minimum power consumption, and (4) Control the attitude angle magnitude in order to control the stiffness and damping coefficients then improve bearing stability. The thickness of the oil film between the pads and the shaft surface had been obtained using an equation that was derived specially for this purpose. Then the pressure of each point on the three pads surfaces were also calculated using Reynolds equation which solved numerically using a computer program. The results showed that there is a certain direction for the external load (a specific value for
Metrics
Article Details
This work is licensed under a Creative Commons Attribution 4.0 International License.
THIS IS AN OPEN ACCESS ARTICLE UNDER THE CC BY LICENSE http://creativecommons.org/licenses/by/4.0/
Plaudit
References
Nicholas JC, Wygant KD. Tilting pad journal bearing pivot design for high load applications. Proceedings of the 24th Turbomachinery Symposium: Texas A&M University. Turbomachinery Laboratories; 1995.
He M, Cloud CH, Byrne JM, Vázquez JA. Fundamentals of fluid film journal bearing operation and modeling. Asia Turbomachinery
& Pump Symposium 2016 Proceedings: Texas A&M University. Turbomachinery Laboratory; 2016.
Majed RH. Load line direction and bearing length effects on the tilting 4-pad bearing performance Engineering and Technology Journal 2009; 27 (9): 1691-1700.
Byrne JM, Allaire. Finding the load line direction in the three tilted pad bearing for load capacity. Power Loss, and Rigid Rotor Stability, Report No UVA /643092/MAE98/530 University of Virginia.
Navthar RR, Halegowda DN. Stability analysis of hydrodynamic journal bearing using stiffness coefficients. International Journal of Engineering Science and Technology 2010; 2 (2): 87-93.
Salant R, Fortier A. Numerical simulation of a slider bearing with an engineered slip/no-slip surface. 14th International Colloquium of Tribology, Esslingen, Germany; 2004. pp. 1699-1704.
Fortier AE. Numerical simulation of hydrodynamic bearings with engineered slip/no-slip surfaces. MSc. Thesis: Georgia Institute of Technology; 2004.
Sabnavis G. Test results for shaft tracking behavior of pads in a spherical pivot type tilting pad journal bearing. MSc. Thesis. Virginia Polytechnic Institute and State University; USA: 2005.
Mahesh A, Belkar S, Kharde R. Pressure distribution analysis of plain journal bearing with lobe journal bearing. International Journal of Engineering Research & Technology 2013; 2: 1-6.
Muhsin IB. Study of a four titled pad bearing. Tikrit Journal of Engineering Sciences 2009; 16 (2): 28-42. DOI: https://doi.org/10.25130/tjes.16.2.06
Dynamics of Simple Rotor-Fluid Film Bearing System, L. San Andrés, Lecture Notes (#5) in Modern Lubrication, http://phn.tamu.edu/TRIBGroup, 2002.