For Use at Low-temperature
When employing conveyor chains at low-temperature this kind of as inside a fridge or within a cold environment, the next disorders may possibly take place.
1) Low temperature brittleness
Normally, a materials is embrittled at low-temperature and shock resistance is lowered. This phenomenon is called low-temperature brittleness, as well as the degree of embrittlement differs from material to material.
The service limit of the 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. may be triggered through 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 trigger an overload to act about the chain and drive, diminishing the life of the chain.
To prevent freezing, normally, it’s proposed to fill the clearances having a low-temperature lubricant appropriate to your service temperature to prevent water, frost, and so forth. from penetrating the respective portions on the chain. For lubrication, a silicon based mostly grease is encouraged.
For Use at High-temperature
Chains power is diminished by high-temperature ambiance, direct conveying of high-temperature loads, or radiated heat, and so on. The services restrict at high-temperature depends not on the temperature in the services setting however the temperature and materials on the chain body.
Following situations might come about when chains are utilised at high-temperature:
one) High temperature brittleness and fracture by lowered hardness of heat treated materials
two) Brittleness brought about by carbide precipitation
3) Abnormal put on by scale
four) Fatigue fracture triggered by repeated thermal shock (cooling and expansion)
five) Abnormal wear because of a rise inside the coefficient of friction
six) Creep fracture
seven) Fracture on account of thermal fatigue of welded area
eight) Effects brought about by thermal growth
?Stiff links and rotation failure as a consequence of decreased clearance ?Fatigue fracture as a result of lowered fitting force
9）Lubrication failure and stiff back links because of deterioration and carbonization of lubricating oil
Grease excellent in heat resistance include these determined by silicon, graphite or molybdenum disulfide.
For use at high-temperature, high-temperature resistance bearings and stainless steel bearings are proposed.