For Use at Low-temperature
When employing conveyor chains at low-temperature such as in a refrigerator or in a cold ambiance, the next disorders may well come about.
1) Minimal temperature brittleness
On the whole, a material is embrittled at low-temperature and shock resistance is lowered. This phenomenon is known as low-temperature brittleness, as well as the degree of embrittlement differs from materials to materials.
The support restrict of a conveyor chain is determined by its specifications.
2)Influence of freezing
At low-temperature, bending failure, roller rotation failure, repairing of chain, and so forth. may be induced through the freezing of penetrated water or deposited frost in the clearance concerning pins and bushings, bushings and rollers or inner plates and outer plates. These problems induce an overload to act within the chain and drive, diminishing the lifestyle of your chain.
To prevent freezing, generally, it is actually suggested to fill the clearances which has a low-temperature lubricant suitable on the service temperature to stop water, frost, and so forth. from penetrating the respective portions with the chain. For lubrication, a silicon based grease is encouraged.
For Use at High-temperature
Chains strength is diminished by high-temperature ambiance, direct conveying of high-temperature loads, or radiated heat, etc. The service limit at high-temperature depends not within the temperature with the support environment but the temperature and material with the chain entire body.
Following circumstances might come about when chains are used at high-temperature:
1) High temperature brittleness and fracture by lowered hardness of heat handled material
two) Brittleness brought about by carbide precipitation
three) Abnormal dress in by scale
four) Fatigue fracture induced by repeated thermal shock (cooling and growth)
five) Abnormal wear resulting from a rise in the coefficient of friction
six) Creep fracture
seven) Fracture resulting from thermal fatigue of welded region
eight) Effects triggered by thermal expansion
?Stiff links and rotation failure resulting from decreased clearance ?Fatigue fracture because of lowered fitting force
9)Lubrication failure and stiff links resulting from deterioration and carbonization of lubricating oil
Grease excellent in heat resistance consist of people dependant on silicon, graphite or molybdenum disulfide.
For use at high-temperature, high-temperature resistance bearings and stainless steel bearings are encouraged.