Page 96 - Electric Drives and Electromechanical Systems

Chapter 3 Power transmission and sizing 89

FIG. 3.11 Three possible approaches to supporting a rotating shaft. (A) Locating and non-locating bearing. (B)
Adjusted bearing arrangement. (C) Floating bearing arrangements.

Floating bearing arrangements are also cross located and are suitable where demands
regarding axial location are moderate or where other components on the shaft serve to
locate it axially. Deep groove ball bearings will satisfy this arrangement, Fig. 3.11C.
In many applications, the load can be predominantly axial, for example a vertically
mounted motor and pump. In these applications thrust bearings are used to minimise
the friction between the axial loaded shaft and a second, normally stationary, compo-
nent. Two examples of thrust bearings are shown in Fig. 3.12;