Machinery's Handbook, 31st Edition
Journal Bearings
2407
1100 1000
900 800 700 600 500 400 300 200 100
0 20 40 60 80
100 120 140 160 180
t R , degrees F
Fig. 4. Heat-Radiating Capacity Factor, Ct R , versus Bearing Temperature Rise, t R —Journal Bearings.
Journal Bearing Design Notation.— The symbols used in the following step-by-step procedure for lubrication analysis and design of a plain sleeve or journal bearing are as follows: c = specific heat of lubricant, Btu/lb/degree F
c d = diametral clearance, inches C n = capacity number bearing d = journal diameter, inches e = eccentricity, inches h o = minimum film thickness, inch K = constants l = bearing length as defined in Fig. 5, inches L = actual length of bearing, inches m = clearance modulus N = rpm p b = unit load, psi p s = oil supply pressure, psi P f = friction horsepower P ′ = bearing pressure parameter q = flow factor Q 1 = hydrodynamic flow, gpm Q 2 = pressure flow, gpm Q = total flow, gpm Q new = new total flow, gpm
Copyright 2020, Industrial Press, Inc.
ebooks.industrialpress.com
Made with FlippingBook - Share PDF online