Rolling bearing is generally used in the supporting wheel of three drum dryer. The supporting wheel device is provided with a rotary shaft type and a fixed shaft type two structures. The rotating shaft type supporting wheel rotates with the shaft, and a pair of roller bearings can bear radial and axial loads. The structure of the fixed shaft type supporting wheel is not only a shaft rotation, but only under static load, so the force condition of the shaft is good, but the structure is complex, the loading and unloading bearing is inconvenient, and the use is less.
Three cylinder dryer supporting wheel material by ZG310-570 steel castings, normalizing, the processed surface hardness of not less than HB190 and bearing seat is made of cast steel and cast iron materials, and higher than that of the tyre cylindrical surface hardness HB20. Supporting wheel outer round surface roughness degree to wear the impact is very large, the surface is too rough will lead to wheel and supporting wheel rapid wear, so t