1.Selection of Wire Rope
Refer to GB8918-2006"Steel wire ropes for important purposes"and
GB/T20018-2006"Steel wire ropes for general purposes"on how to
select from different constructions of wire rope.Please also refer
to this section of our product catalogue in selecting wire rope.We
suggest choosing equal lay
steel wire rope,Compacted wire rope for general usage.The technical
parameters such as lifting load,safety coefficient,and the lifting
capacity of the lifting eauipment should be taken into conside
ration when selecting the strenath class of wire rope.Do not
blindly choose hiah strenath and high breaking force wire rope,this
may compromise results.
2.Installation of Wire Rope Unwinding: Put a piece of iron tube
through the reel or coil of wire rope,then install the reel onto a
dedicated carrier.Keep the wire rope parallel to the ground and
turn to unwind.The arrangement of wire rope on the reel:The winding
direction of wire rope on the reel Should depend on the lay
direction of wire rope from left to right for right-lay wire
rope,from right to left for left-lay wire rope. Wind the wire rope
neatly onto the reel without the wire rope overlapping each other.
Cutting: For wire rope with relatively high residual stress,use a
soft iron wire to tie the rope 10-20mm from the cutting point.The
length of the soft iron wire should be 1-4 times that of rope
diameter.Then cut with cutting tool.
3.Maintenance and Inspection of Steel Wire Rope Operarion: In
operation, the wire rope should be in steady speed,never
overload,and never shock load a wire rope.
Maintenance: Lubricant is applied to the wires and strands of a
wire rope when manufactured.This lubricant is depleted when the
rope is in service.And various nocuous matters will stick to the
surface of the rope.These will cause abrasion between wire rope and
the block,and rusting of the rope.lt is important to clean and
replace lubricant to the wire rope periodically.
Record of inspection: wire rope should be inspected regularly,and
all the records should be kept carefully.Other than cleaning and
adding lubricant,the inspection should include checking the
following: abrasion of wire rope,condition of broken wires,and
corrosion.Also check the condition of metal parts such as pulley
groove,loading ring,hook,etc.Pay special attention and check for
external and internal broken wires in the fixed end of wire
rope,and the section of wire rope that passes through pulley blocks
and drums.
4.Contact between Wire Rope and Pulley Groove
The appropriate contact between pulley groove and wire rope is
indicated in (figure 1).If the pulley groove is too wide(figure).
2),the wire rope and its metal core are subiect to more broken
wires owing to fatigue. lf the pulley groove is too narrowf(igure).
3),the wire rope will be worn seriously. The ratio between the
radius of pulley groove and that of the wre rope should
be:R/d=0.525~0.550.
