As a supporting device for a rotary kiln, the structure of the supporting roller and the bearing is crucial. The supporting roller device bears the weight of the whole rotating part (mainly the rotary kiln shell, lining brick, kiln heat exchange device, material, rolling ring gear), and enables the rotary kiln shell and roller ring to rotate smoothly on the supporting roller. . The supporting roller device can be divided into a sliding bearing roller, a roller bearing roller set, and a roller bearing roller roller bearing (radial sliding bearing, axial rolling bearing) according to the bearings used in the device. Rolling bearing wheel sets can be divided into two types according to shaft rotation and non-rotation. They have the advantages of simple structure, easy maintenance, low frictional resistance, reduced power consumption and simple manufacturing, but due to the load of the supporting roller can reach hundreds of tons, the required rolling bearing size is large. Subject to availability conditions. However, with the improvement of industrial technology level, the use of rolling bearings in roller support devices will increase.
Rotary kiln support rollers are equipped with rolling bearings. Force characteristics are: radial force is great; axial force is also very large compared with radial force. For the left and right bearing seats separately set, radial bearings and thrust bearings need to adopt spherical spherical bearings. In order to ensure the flexible rotation of the two bearings, the spherical center of the two bearings must be coincident with the O point. For this reason, an axial distance ring is provided between the two bearings to facilitate adjustment.
However, when the left and right bearing seats are integrated, the thrust bearings can be replaced by ordinary thrust bearings. At the same time, double row spherical roller bearings are used to withstand radial forces. When the load is small, a tapered roller bearing can be used while receiving radial and axial forces.
