Machinery's Handbook, 31st Edition
2406
Journal Bearings
W
Bearing
W
Journal
Lubricant
N
e
θ
Bearing
Shaft
h o
Pressure Distribution
d
d + c d
Fig. 2. Typical Pressure Profile of Journal Bearing.
Fig. 1. Basic Components of a Journal Bearing.
Types of Journal Bearing Oil Grooving
Fig. 3a. Single Inlet Hole
Fig. 3b. Circular Groove
Fig. 3d. Straight Axial Groove with Feeder Groove
Fig. 3c. Straight Axial Groove
Fig. 3e. Straight Axial Groove in Shaft
rise to an unsatisfactory level. The heat-radiating capacity H R of the bearing in foot- pounds per minute may be calculated from the formula H R = Ld Ct R in which C is a con- stant determined by O. Lasche, and t R is temperature rise in degrees Fahrenheit. Values for the product Ct R may be found from the curves in Fig. 4 for various values of bearing temperature rise t R and for three operating conditions. In this equation, L = total length of the bearing in inches and d = bearing diameter in inches.
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