Performance test of belt conveyor rollers

The performance test of belt conveyor rollers mainly includes the following aspects:

‌Appearance inspection‌: The surface of the roller should be free of defects such as cracks, sand holes, pores, etc., and the surface roughness Ra should not exceed 6.3μm. The anti-corrosion coating should be uniform, with a thickness of not less than 80μm, and no peeling or peeling.

‌Dimension inspection‌:

‌Diameter deviation‌: The diameter deviation of the roller body should be controlled within the range of ±0.2mm.
‌Length deviation‌: The length deviation of the roller shall not exceed ±2mm.
‌Coaxiality‌: The coaxiality error of the shaft necks at both ends of the roller shall not exceed 0.05mm.
‌Wall thickness measurement‌: Use an ultrasonic thickness gauge or a magnetic induction thickness gauge to ensure that the measuring points are evenly distributed.
‌Eccentricity measurement‌: Use a concentricity detector to ensure that the eccentricity is not greater than the specified value to avoid the impact of yaw on the smooth operation.
‌Rotation flexibility check‌:

‌Rotation resistance‌: Under no-load condition, the rotation resistance of the roller should not be greater than 2N.
‌Rotation stability‌: The roller should rotate smoothly without obvious jumping, and the jumping amount should not exceed 0.3mm‌.
‌Sealing performance check‌:

‌Dustproof performance‌: In the simulated dust environment test, the amount of dust entering the roller should not exceed 5g.
‌Waterproof performance‌: After the waterproof test, the accumulated water inside the roller should not exceed 10mL‌.
‌Hardness check‌: The surface hardness of the roller body should reach HRC40-45, and the surface hardness of the journal should not be less than HRC55‌.

‌Material inspection‌: The chemical composition and mechanical properties of the roller body material should meet the requirements of relevant standards, such as the yield strength of Q235 steel should not be less than 235MPa, and the tensile strength should not be less than 375MPa. The bearing material should comply with national standards, with an inner diameter tolerance of ±0.015mm and an outer diameter tolerance of ±0.01mm‌.