For Use at Low-temperature
When making use of conveyor chains at low-temperature such as in a fridge or inside a cold atmosphere, the following problems might happen.
1) Lower temperature brittleness
Generally, a materials is embrittled at low-temperature and shock resistance is lowered. This phenomenon is termed low-temperature brittleness, and also the degree of embrittlement differs from materials to material.
The support limit of the conveyor chain depends upon its specifications.
2)Influence of freezing
At low-temperature, bending failure, roller rotation failure, repairing of chain, and so on. may very well be brought on through the freezing of penetrated water or deposited frost during the clearance involving pins and bushings, bushings and rollers or inner plates and outer plates. These conditions cause an overload to act within the chain and drive, diminishing the daily life with the chain.
To prevent freezing, in general, it is advisable to fill the clearances which has a low-temperature lubricant suitable on the service temperature to avoid water, frost, and so forth. from penetrating the respective portions in the chain. For lubrication, a silicon primarily based grease is advisable.
For Use at High-temperature
Chains power is diminished by high-temperature environment, direct conveying of high-temperature loads, or radiated heat, and so on. The service limit at high-temperature depends not over the temperature from the service surroundings however the temperature and materials in the chain entire body.
Following circumstances may arise when chains are employed at high-temperature:
1) High temperature brittleness and fracture by lowered hardness of heat taken care of material
2) Brittleness induced by carbide precipitation
three) Abnormal put on by scale
four) Fatigue fracture brought on by repeated thermal shock (cooling and expansion)
five) Abnormal wear due to a rise within the coefficient of friction
six) Creep fracture
7) Fracture as a result of thermal fatigue of welded place
8) Effects triggered by thermal expansion
?Stiff back links and rotation failure resulting from decreased clearance ?Fatigue fracture because of lowered fitting force
9)Lubrication failure and stiff backlinks due to deterioration and carbonization of lubricating oil
Grease fantastic in heat resistance involve those depending on silicon, graphite or molybdenum disulfide.
For use at high-temperature, high-temperature resistance bearings and stainless steel bearings are encouraged.