FlexLink X45 (43 мм) Тех. обслуживание - Manual (Page 9)

Maintenance 9
Inspection – conveyor chains
Conveyor chains
The most common types of conveyor chains are:
• Plain conveyor chains.
.
• Chain with cleats for inclined or vertical conveyor sec-
tions. The cleats are generally spread over the chain
at a predetermined distance.
• Chain with flexible cleats for vertical wedge convey-
ors.
• Chain with friction surface for conveyors with an
incline up to 30°. The friction surfaces are normally
distributed over the chain at a predetermined dis-
tance.
Cleated, friction and wedge chains
Cleated chains, friction chains and wedge chains, or
other special chains should be inspected regularly, and
any defective links replaced or cleaned.
Warning
Only warm water (50°C), with soap if necessary, may be
used for cleaning conveyor chains.
• Check the guards on cleated chain conveyors.
Checking the tension of conveyor chain
The chain is made of elastic material. The chain eventu-
ally stretches as the material creeps. The extent of the
stretch depends on the traction force in the chain. The
stretch shows itself as slack on the return side of the
drive unit.
The tension of the conveyor chain should be checked
after 50, 250, 500 hours of operation and thereafter every
500 hours.
In operation there will be some slack in the conveyor
chain. How much slack is acceptable depends on the
length of the conveyor chain. The most suitable places to
check the slack in the chain are at intermediate or end
drive units.
Plain conveyor chain
Cleated chain
Chain with flexible cleats
Chain with friction surface