Roller skis are used by cross-country skiers, biathletes and ski-orienteers for their snow-free training and in roller ski competitions. Additionally, much of the current sports research into the physiology and biomechanics of crosscountry skiing is conducted indoors on treadmills using roller skis. For elite athletes, the differences in performance are quite small, thus emphasising the importa...

The premature failure of a cylindrical roller bearing took place during service, with total operation time 100 h. cause was analyzed by macroscopic and microscopic observation, metallographic analysis, hardness testing, tightening axial force influence test verification. results show that modes the are contact fatigue spalling, wear, fracture. outer ring, inner rollers, cages all have suffered ...

The aim of this project is to develop methods for scaling up roller compaction process from lab scale to pilot scale, to determine the effect of processing parameters of roller compactors at both lab scale (instrumented roller compactor at University of Birmingham, micro-pactor at Pfizer) and pilot scale (mini-pactor from Gerteis) on the attributes of dry-granulated formulations, including the ...

Reducing start and stop time without destroying the pavement surface is important in enhancing productivity of double-drum roller and compact quality of asphalt pavement, but it is difficult in confirming the maximum brake deceleration or start acceleration of double-drum roller. Dynamic analysis is used in studying these questions, and a mathematic model of double-drum roller is established, b...

Vibration analysis is an effective tool for the condition monitoring and fault diagnosis of rolling element bearings. Conventional diagnostic methods are based on the stationary assumption, thus they are not applicable to the diagnosis of bearings working under varying speed. This constraint limits the bearing diagnosis to the industrial application significantly. In order to extend the convent...

In the sugar mill machine, equipment is operated under high temperature. This temperature will affect to roller shaft and journal bearing. Additionally, damages could be caused by various factors that affected directly this research, operations of equipments were modelled using finite element analysis program (FEA), determine maximum bearing after a specified period time. An experiment with phy...