Orifice compensated performance characteristics of hybrid hole-entry conical journal bearing

Abstract

Influence of semi-cone angles on the performance of the non-recessed hybrid/hydrostatic hole-entry conical journal bearing compensated with orifice restrictor has been carried out analytically. The analysis comprises two rows of symmetric hole-entry contour in the circumferential direction of hybrid/hydrostatic conical journal bearing. An orifice restrictor is used in the hole-entry contour to allow the restricted flow in the clearance space of a journal and bearing. Well-known finite element method and Newton-Raphson method for restrictor have been used to solve the Reynolds equation, governing the fluid flow in the clearance space of a hybrid/hydrostatic conical journal and bearing. Further, the spherical coordinate system has been employed to solve Reynolds equation instead of cylindrical coordinate system. Performance characteristics in terms of stiffness coefficient, damping coefficient, bearing pressure, bearing flow, and minimum fluid film thickness have been discussed for variable external radial load ( " W r ) ¼ 0.25-1.5. The performance characteristics in terms of " h min , " Q, and " S 22 is found to be quite significant for hybrid hole-entry conical journal bearing when compared with hydrostatic hole-entry conical journal bearing, which allows the designer to choose appropriate non-recessed hybrid hole-entry conical journal bearing.

Restrictor-based studies of hybrid hole-entry conical journal bearings

“…Reynolds equation is applied to lubricant flow field for the given boundary conditions (Khakse et al, 2017):…”

“…Reynolds formula in the spherical coordinate form for conical hole-entry journal bearing in hybrid mode is as follow (Khakse et al , 2017): …”

Effect of Thermal Distortion on Performance of Hybrid Journal Bearing

“…These classes of bearings when designed appropriately perform superior to multi recessed bearing with the appropriate characteristics of hydrodynamic bearings at high speed and hydrostatic bearings at low speed. A thorough literature review [15][16][17]…”

Effect of wear on the performance of hole entry hybrid conical journal bearing employing constant flow valve compensation

“…Also, Khaske et al. 32 described the performance of orifice-compensated HEHCJB and suggested hybrid bearing for the improved performance. Recent paper of Kumar and Varma 33 reveals that the noncircular bearing using CFV restrictor with micropolar lubricant is better than the circular bearing.…”

“…Rajput and Sharma 30,31 reported an enhanced performance with micropolar lubricated bearing vis-a`-vis Newtonian lubricated bearing and the influence of geometric irregularities on the performance of misaligned hybrid journal bearing with membrane restrictor, respectively. Also, Khaske et al 32 described the performance of orifice-compensated HEHCJB and suggested hybrid bearing for the improved performance. Recent paper of Kumar and Varma 33 reveals that the noncircular bearing using CFV restrictor with micropolar lubricant is better than the circular bearing.…”