As the supporting device of rotary kiln, the structure of support roller and bearing is essential. Kiln support roller device withstands the weight of the entire rotary part (mainly rotary kiln cylinder, lining brick, kiln heat transfer device, materials, rolling ring and girth gear), and makes rotary kiln cylinder and rolling ring can rotate smoothly. According to the types of bearing, support roller device can be divided into slide-bearing support roller, rolling-bearing support roller and slide-rolling bearing support roller (radial sliding bearings, axial rolling bearings). Rolling-bearing support roller set has advantages of simple structure, easy maintenance, small friction resistance, low power consumption and simple process, but because the load of support roller can be up to hundreds of tons, the required size of the rolling bearing is larger, which is subject to supply constraints. However, with the improvement of industrial technology, the use of rolling bearings in the roller device will be more and more.

CHAENG is specialized in manufacturing rotary kiln for 60 years, using rolling bearings in the support roller device. Force characteristics are: radial force is large; axial force is also great comparing with radial force. Separately set the left and right bearing seats, radial bearings and thrust bearings are required to use self-aligning spherical bearings. In order to ensure the rotation of the two bearings are flexible, the spherical centers of the two bearings must coincide with the O point, for which an axial spacer ring is arranged between the two bearings for adjustment.

But if the left and right bearing seats are made together, can use the general thrust bearing instead of self-aligning thrust bearing, at the same time use double-row spherical roller bearings to withstand radial forces. When the load is smaller relatively, can use tapered roller bearings to support radial and axial forces.