Influence of Geometric Irregularities of Journal on the Performance of Capillary Compensated Multirecess Hydrostatic Journal Bearing

摘要

Normally, during the machining operation of a journal, different types of geometric irregularities such as barrel, bellmouthand circumferential undulations occurs. In general, order of magnitude of these irregularities is equal to the order of bearingclearance space. Thus, the bearing performance gets affected. For realistic generation of bearing performance characteristicsdata, the inclusion of these irregularities in the analysis is essential. Therefore, the present work deals with the effect ofdifferent geometric irregularities on the performance of capillary compensated multirecess hydrostatic journal bearingsystem. The governing Reynolds equation is solved by using FEM. The computed results indicate that for a specified value ofthe external load, the value of minimum fluid film thickness (h_(min)) gets reduced due to journal irregularities, however, thereduction in the value of h_(min) is observed to be largest for a barrel shaped journal and lowest for the bellmouth shaped journalvis a vis ideal journal.