LUBRICATION 2tw

ciicular to the paper. As soon as a load Is on tk Iwvirltu

"block, the liquid begins to be squeezed out i*>t*x»i : tlr

surfaces. If this space is divided into the tvtiJ .,r*vi*

indicated by the dotted lines, these lines, moving wnh *ht *r.«; I
"will after a time occupy the positions of the curved Ikt^; ui*d
the distances moved "by the particles are by th» dNtai, ^

"between tbe corresponding points on the two <et> o*" ui v* ^ .4-
^J3*1 for the pointPj and the slopes of the curves iT dk at ^+L* air* •-
tions of the forces in the fluid Just, as if the liius wero ^ reti VI

A < " 8
FIG. 83.—The simplest case of lubrication. Two parallel, surfaces.
elastic threads. The pressures exerted
along CD are shown in the curve of pressures CFD, the
being proportional to the vertical height above the line CED.
-At the center of the block the pressure is a the
liquid is squeezed out to the right left of this For
-fctds section alone, there is a uniform "variation of
~A. R to CD, siich as would be true of all if the
-A J3 and CD were not approaching.
Case IL Surfaces Indined— —•
If now the bearing block is tilted, we have the
condition for continuous lubrication, for the is
to sustain a load without the surfaces
"Were we to assume that in this the velocity
formly from U at AR to zero at CD, the quantity of
ajxy cross-section Jf JV would be proportional to MN X CT/2,
or simply to MN. But since the quantity of
cross-section must be the same, there must be an to
the right and left of the cross-section MW, at the
is a' maximum, so the flow at any section MN is
(MN - MWO 17/2
At the cross-section MN, the -velocity