7'110 ./lrrirl ,filrrt lrcbrictrtioir eqt~(~tiori f i r a zero-speed, orificecorrrprr~.vrtt(~l, rrr rtllipockrt Iryrlrostntic joz~rrtal bearing is solved by a fir1ik11 r l~r r r~r~t rrr~lIro(/,~)r (deterrrtii~i~~g ils slca4-slate performance cot(/ rltr rljrrcrrrric slifj51r.v~ cord d(~otrpirig co(II/ficients. TI(ese coefficirrtl.~ of /Ir(~,filttr it!flrrorct~ tit(! re.spoitsr! of tlrc .slrrrfi-bectring system. Prr:fi~rrtrrrr~cr (Itlo h n v~ brrtt cottr/)uted for o,filrr-pockct Oenriiig o j LIL) = 1 .O, roillt vnriorts orqice rirsipr parc~rrreters a i d ecceiitricity r.nlio.s. For sln/)i/ilj .slrcdirs, critirrr/ ~n m s for the lii~enrizrd syste~tl Itcrs brrrr drtrrtrtiiied 19 liorr/lr~s criterioir. By n'iscretiziizg lirrrr n~t d rtsi,trg /lrp Rrorgv-Kr~ll~t ttr(~tho(1, rnotiorr trNjectori(!s of ~I I P ~O I I W I ( I I rrrrlpr ~( I V P OPPII /h~orelic(~lly ( i~~t e r ) n i i~~~I for (I. small arbitrary itiiticrl rlislri r1)orrcr.
Using finite element method steady state and dynamic performance of a capillary compensated hydrostatic journal bearing have been investigated. For stability studies, the critical mass of the bearing system has been determined by Routh’s criterion. The locus of the journal center has been predicted by discretizing time and numerically integrating the equations of motion governing the journal bearing system.
A theoretical solution, using finite element method, to predict performance characteristics of a capillary compensated hydrostatic oil journal bearing has been presented. Load capacity curves for two load directions of a typical bearing with four pockets are given for various design parameters and eccentricity ratios, and the four fluid film stiffness coefficients are computed. The effect of the feeding system on bearing load capacity and stiffness is discussed. Without using the flow approximations of Raimondi and Boyd [1] and Kher and Cowley [2], which are essentially valid for small eccentricity ratios and small circumferential land widths, the bearing flow has been computed both as the sum of nodal flows on the external boundary and as the inflow to the pockets.
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