For Use at Low-temperature
When applying conveyor chains at low-temperature such as in the fridge or within a cold atmosphere, the following situations may happen.
1) Reduced temperature brittleness
On the whole, a materials is embrittled at low-temperature and shock resistance is lowered. This phenomenon is termed low-temperature brittleness, as well as the degree of embrittlement differs from material to materials.
The service restrict of a conveyor chain is dependent upon its specifications.
2)Influence of freezing
At low-temperature, bending failure, roller rotation failure, repairing of chain, and so forth. could possibly be brought on by the freezing of penetrated water or deposited frost in the clearance between pins and bushings, bushings and rollers or inner plates and outer plates. These circumstances induce an overload to act to the chain and drive, diminishing the daily life on the chain.
To prevent freezing, on the whole, it is recommended to fill the clearances having a low-temperature lubricant suitable for the service temperature to stop water, frost, and so on. from penetrating the respective portions from the chain. For lubrication, a silicon based grease is advised.
For Use at High-temperature
Chains strength is diminished by high-temperature atmosphere, direct conveying of high-temperature loads, or radiated heat, and so on. The services limit at high-temperature depends not around the temperature of your support atmosphere however the temperature and materials of the chain entire body.
Following conditions may perhaps come about when chains are employed at high-temperature:
1) High temperature brittleness and fracture by lowered hardness of heat treated material
2) Brittleness brought on by carbide precipitation
three) Abnormal wear by scale
four) Fatigue fracture induced by repeated thermal shock (cooling and growth)
five) Abnormal wear because of a rise from the coefficient of friction
six) Creep fracture
7) Fracture as a consequence of thermal fatigue of welded location
eight) Effects brought on by thermal growth
?Stiff back links and rotation failure as a consequence of decreased clearance ?Fatigue fracture resulting from lowered fitting force
9)Lubrication failure and stiff hyperlinks as a result of deterioration and carbonization of lubricating oil
Grease outstanding in heat resistance contain individuals according to silicon, graphite or molybdenum disulfide.
For use at high-temperature, high-temperature resistance bearings and stainless steel bearings are recommended.