| 摘要 |
<p>A pivoted pad journal bearing for and method of supporting a journal member for bidirectional rotation with the effect of an offset pivot on the pivoted bearing pad, but without the necessity of mechanically shifting the bearing pad pivot point with change in direction of rotation of the journal. An oil distribution groove is provided in the journal bearing face of the pivoted bearing pad contiguous but spaced from each of the opposite circumferentially spaced first and second edges of the bearing pad. For a given direction of rotation of the journal, the first edge will be the "leading" edge, while the second edge will be the "trailing" edge. For the opposite direction of rotation, the converse will be true. The bearing pad includes a pivotal support permanently located midway between the first and second edges. Each of the opposite oil distribution grooves is adapted to be connected to a low pressure oil supply. For a given direction of rotation, means are provided for maintaining the oil distribution groove contiguous the "leading" edge at pump output pressure and for maintaining the oil distribution groove contiguous the "trailing" edge at sump pressure (essentially zero pressure). This provides a pressure profile of the oil film at the journal bearing surface of the pivoted bearing pad such that the mechanically fixed pivot point is effectively located further from the "leading" edge than from the effective "trailing" edge of the pivoted bearing pad, thus giving the advantages and effect of an offset pivot without the necessity of mechanically shifting the pivot.</p> |
