Page 224 - Tribology in Machine Design

Sliding-element bearings 209

total vertical load per unit length

where the summation sign covers N terms.
From the table of the Reynolds integrals, discussed in Chapter 2, it
follows

the mean value of

so that

Following usual practice, take the effective arc of action of the pads to be 80
per cent of the complete ring, then (NB) = 5r; hence neglecting leakage
?S P

For the pads, assume z = 1.69 and (/B)//l = 2.36, then
4 A r\

The tangential drag in each pad is/P, and so

If F is the total frictional resistance exerted on the journal per unit length

Again, from the table of integrals (see Chapter 2), the mean value of I/A
from 0 to 2n is

so that