For Use at Low-temperature
When applying conveyor chains at low-temperature such as within a refrigerator or inside a cold environment, the next problems might occur.
1) Low temperature brittleness
In general, a materials is embrittled at low-temperature and shock resistance is lowered. This phenomenon is called low-temperature brittleness, and also the degree of embrittlement differs from material to material.
The support limit of a conveyor chain depends on its specifications.
2)Influence of freezing
At low-temperature, bending failure, roller rotation failure, fixing of chain, and so on. could possibly be brought on by the freezing of penetrated water or deposited frost inside the clearance in between pins and bushings, bushings and rollers or inner plates and outer plates. These conditions trigger an overload to act about the chain and drive, diminishing the life from the chain.
To avoid freezing, usually, it really is advisable to fill the clearances which has a low-temperature lubricant appropriate on the services temperature to avoid water, frost, etc. from penetrating the respective portions in the chain. For lubrication, a silicon based grease is recommended.
For Use at High-temperature
Chains strength is diminished by high-temperature environment, direct conveying of high-temperature loads, or radiated heat, etc. The support limit at high-temperature depends not about the temperature with the support natural environment but the temperature and material with the chain entire body.
Following disorders could come about when chains are utilised at high-temperature:
one) High temperature brittleness and fracture by lowered hardness of heat handled materials
two) Brittleness caused by carbide precipitation
three) Abnormal put on by scale
4) Fatigue fracture triggered by repeated thermal shock (cooling and expansion)
five) Abnormal wear due to an increase from the coefficient of friction
6) Creep fracture
7) Fracture as a result of thermal fatigue of welded location
8) Effects brought on by thermal growth
?Stiff hyperlinks and rotation failure as a consequence of decreased clearance ?Fatigue fracture on account of lowered fitting force
9）Lubrication failure and stiff backlinks as a result of deterioration and carbonization of lubricating oil
Grease great in heat resistance incorporate these determined by silicon, graphite or molybdenum disulfide.
For use at high-temperature, high-temperature resistance bearings and stainless steel bearings are proposed.