The current study represents a full investigation into the behaviour of a fluid film squeezed between two circular parallel plates by normal velocity which is produced by three types of loading condition: steadily-applied, impact-loaded, or oscillatory motion, in which the fluid in between the two plates is considered to be Newtonian or non-Newtonian and the solid boundary materials used are either both rigid or one of them is flexible. A mathematical model has been developed to include the effect of the fluid inertia, non-Newtonian fluid film, and flexibility of the solid material in determining the behaviour of a squeeze film bearing. The non-Newtonian power law model has been adopted in the current theoretical analysis, and the compliant surface bearing has been simulated in terms of the deflection of a mild steel diaphragm. The theoretical analysis was also developed to demonstrate the generation of the steady-state force generated in the oil film when it was subjected to an oscillatory squeeze motion and to show the distinction between a fixed and a free bearing system. The theoretical results are presented in graphical form to demonstrate the behaviour of the squeeze film bearing for different lubrication properties and solid material condition in which a comparison of conventional bearing behaviour with compliant surface, non-Newtonian fluid behaviour has been carried out. An experimental test rig was modified to permit a wide range of experiments to be performed utilising up-to-date, computerised data collection and manipulation procedures. A series of tests were carried out and a comparison of the results was made with predicted theoretical solutions and published work. The results of the investigation show that the new theoretical development can be utilised for a wide range of operating conditions and that it has been validated by comparing results with published literature of other workers and also with the results of experiments conducted in the laboratory.
| Identifer | oai:union.ndltd.org:bl.uk/oai:ethos.bl.uk:635694 |
| Date | January 1994 |
| Creators | Al-Makhlafy, A. N. |
| Publisher | Swansea University |
| Source Sets | Ethos UK |
| Detected Language | English |
| Type | Electronic Thesis or Dissertation |
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