MLS MMLS3, Руководство оператора

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MLS Test Systems Pty Ltd
Revised: April 2013
23
4.2 The drive belts
The drive drum is driven by two V-belts. From time to time
(say every 500 000 axle loads) Remove the safety cover (two
M6 bolts on top and two at the bottom) and inspect the belts for
wear and damage. Replace and/or tension the belts if
necessary. The longer belt is tensioned by moving the motor.
Make sure that the two pulleys are in the same plane by laying a
long straight edge along their front surfaces. The shorter belt is
tensioned automatically by a tension pulley. The type
specification for the inner belt is 13x1080, while the outer one is
an 13x1860
4.3 The gap between the rails and the drum
Refer to fig. 6. Where the top and bottom rails meet the
rotating drum that drives the bogies around, the gaps between
the drum and the rail ends should be between 0.2mm and 0.5mm
(measured with a feeler gauge) at its narrowest point. The shaft
of the drum is mounted on horizontal slides and is spring loaded
in the horizontal direction to pinch the yellow guide wheels
between the drum and the outer rail. When the machine
operates there are small horizontal movements of the drum,
which may wear the slides. This can cause the drum to displace
vertically, changing the gaps mentioned above.
It is thus necessary to check the gaps from time to time (say
after every 1 000 000 wheel loads) with a feeler gauge. It is
only necessary to measure the gaps on the top side, assuming
that if they are correct, the bottom ones will be correct as well.
Excessive vertical displacement of the drum will cause the drum
to scrape against the rail ends either at the top or bottom. This
will cause a scraping sound and the motor will draw more
current to overcome the additional friction. Monitor the motor
current as described under 3.3.5 above.