Oshkosh Corporation JERR-DAN 20NGADF6T-LP, Руководство по эксплуатации и безопасности

Страница: 92 / 112

Section 6 - Maintenance
6-8 5376000207
Drum Winding
When wire rope is wound onto a sheave or drum, it should bend in the manner in
which it was originally wound. This will avoid causing a reverse bend in the rope.
Always wind wire rope from the top of the one reel onto the top of the other. Also
acceptable, but less so, is re-reeling from the bottom of one reel to the bottom of
another. Re-reeling may also be done with reels having their shafts vertical, but
extreme care must be taken to ensure that the rope always remains taut. It should
never be allowed to drop below the lower flange of the reel. A reel resting on the floor
with its axis horizontal may also be rolled along the floor to unreel the rope.
Wire rope should be attached at the correct location on a flat or smooth-faced drum,
so that the rope will spool evenly, with the turns lying snugly against each other in
even layers. If wire rope is wound on a smooth-face drum in the wrong direction, the
turns in the first layer of rope will tend to spread apart on the drum. This results in
the second layer of rope wedging between the open coils, crushing and flattening the
rope as successive layers are spooled.
UNDERWIND LEFT TO RIGHT
USE LEFT LAY ROPE
LEFT LAY
UNDERWIND
OVERWIND RIGHT TO LEFT
USE LEFT LAY ROPE
LEFT LAY
OVERWIND
START ROPE AT
LEFT FLANGE
START ROPE AT
RIGHT FLANGE
OVERWIND LEFT TO RIGHT
USE RIGHT LAY ROPE
RIGHT LAY
OVERWIND
UNDERWIND RIGHT TO LEFT
USE RIGHT LAY ROPE
RIGHT LAY
UNDERWIND
A simple method of determining how a wire rope should be started on a drum is
shown above. The observer stands behind the drum, with the rope coming towards
him. Using the right hand for right-lay wire rope, and the left hand for left lay wire rope,
the clenched fist denotes the drum, the extended index finger the oncoming rope.