This paper provides a quick and readily available method for predicting feed-pressure flow in a journal bearing. A comprehensive feed-pressure flow equation, obtained by judiciously curve-fitting a vast amount of predicted dimensionless flow data, is presented, which: a. considers any rectangular grooving at any position in the bearing, b. considers any journal eccentricity and angular position of the journal center, c. takes into account the variation of film thickness at the groove. This equation forms the focal point of the paper and is in fair agreement with computed results from an accurate finite difference model. Feed-pressure flow-prediction charts are presented for a selection of the more common forms of groove arrangement. Presented at the 37th Annual Meeting in Cincinnati, Ohio, May 10–13, 1982

Feed-Pressure Flow in Plain Journal Bearings

Shape factors in conduction heat flow for circular bars and slabs with various internal geometries

Feed pressure flow in plain journal bearings

Flow parameters are presented for journal and circular pad hydrostatic bearings supplied with oil through a central port shaped as a regular polygon with rounded corners. Load parameters are evaluated for the circular pad bearing. The analysis, by the method of conformal mapping, is extended to the rectangular port and also yields solutions for narrow oilways radiating from a central point in the bearing.

Flow and Load Parameters of Hydrostatic Oil Bearings for Several Port Shapes

Paper 24: Hydrodynamic Journal Bearing Performance at High Speed under Steady Load:

Using conformal representation, the oil flow coefficient of the pressure-fed journal bearing with an axial oil groove is calculated. Though the graphical conformal mapping by Wilcock and Rosenblatt gives merely the data for particular forms of the groove, the coefficient for any value of l/L and b/L can be obtained by this analytical method where l and b are the length and width of the groove respectively, and L is the axial length of the bearing. And also the coefficient for nearly circular hole is simply calculated.

Fujio Hirano

Papers

Oil-Flow Coefficient of Pressure-Fed Journal Bearing