18.104.22.168 The measurement of abrasion in
The sketch in Figure 99 illustrates some
of the measurement set-ups used, consisting of a shaft and
test body (a), a shaft and test body with grinding material
(b), and a pin and disc arrangement (C).
Figure 99: Set-ups used for measuring abrasion
Using the test bed for slip ring seals shown,
it is possible to measure the speed of rotation, temperature
and torque under operating conditions. The rotation speed,
and the choice between dry and wet machining, can be varied.
Figure 100: Measurement set-up for slip ring
Jet abrasion in open systems can relatively
easily and quickly be measured in a blasting test. Materials
can be compared, and ranked according to their abrasion resistance.
Figure 101: Experimental set up for jet
The blasting medium, blasting speed and
the size of the blasting particles have a critical effect
on the results of such measurements.