What Are The Conditions That Roll Crushers Need To Replace Roll Skins? Roller crusher wear parts roll skin replacement standards need to be integrated wear level, equipment operating status and production results and other aspects of judgement, the specific criteria are as follows:
Roller skin wear degree
1. Thickness reduction: when the roll skin wear reaches 20%-30% of the original thickness, it needs to be replaced. For example, the original thickness of 100mm roller skin, the remaining thickness of less than 70-80mm should be considered for replacement. Some manufacturers recommend measuring the remaining thickness below the minimum allowable value (such as 60mm) need to be scrapped.
2. Surface damage: If the surface of the roll skin has obvious depression, cracks, flaking or hardened layer off, it should be replaced in time. Such damage will lead to uneven crushing of materials and accelerate the wear of equipment.
Decrease in production efficiency and quality of roll crusher
1. Decrease in crushing effect: If the particle size of the material is uneven, dust increases or the output decreases significantly (e.g. the output decreases by more than 20%), it indicates that the roll skin is worn out seriously and needs to be replaced.
2. Abnormal energy consumption and efficiency: a sudden increase in energy consumption (such as motor overload) and a decrease in crushing efficiency may be due to increased friction resistance caused by the wear of roll skins, which needs to be checked and replaced.
Abnormal operation of equipment
1. Vibration and noise: when the roll skin is unevenly worn or the bearing is damaged, the vibration amplitude of the equipment will increase, accompanied by abnormal friction or impact sound, and it is necessary to stop the machine for inspection.
2. Increased bearing temperature: If the bearing temperature exceeds 65℃ (the normal range is below 35℃), the load may be uneven due to roller wear, and the condition of roller skin needs to be checked.
