A study of bearing and its types conference Paper

Fig. 6 Thrust bearings with different features: Leading edge grooves (top left), spray lubrication (top 
middle), load equalization (top right), PEEK coated pad (bottom left); oil injection pockets (bottom 
right). 
Other designers have eliminated the pivot and positioned the pad on a bed of springs allowing for a thinner pad 
in which the thermal deflection is opposed by pressure bending induced by the springs. Traditionally, bearings 

---

International Journal of Advance Research In Science And Engineering http://www.ijarse.com
IJARSE, Vol. No.4, Special Issue (01), March 2015 ISSN-2319-8354(E) 
1681 | 
P a g e
are operated in an oil bath under fully flooded conditions. In slow speed bearings movement of the oil in the oil 
bath does not induce a large energy loss. In high-speed bearings however the churning loss may constitute a 
significant part of the total friction loss. In such bearings oil is often directly sprayed onto the collar in the 
groove between the pads or supplied through leading edge grooves. In large applications starting up a loaded 
rotor from zero velocity causes high temperatures to develop due to dry friction and the white metal surface may 
melt. To avoid this, hydrostatic jacking is often used. In recent years attention has turned to using polymer 
materials such as Polyetheretherketones (PEEK) as coating materials instead of white metal because of their low 
friction coefficients against steel. Hydrostatic jacking may then be avoided. 
 
VII. CONCLUSION 
This paper focus on importance of bearing and details about the types of bearing. We have studied mainly four 
types of bearing as they are having unique characteristics and applications in mechanical field. Thrust bearing is 
not in common use, but it is very useful mainly in heavy duty applications. Michell principle shows the tilting 
fundamentals of thrust bearing which will then leads to proper pressure and lubrication wedge distribution.