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Support roller and bearing structure of cement rotary kiln
2018-05-29 | Editor:
As the supporting device for rotary kiln, the structure of kiln support roller and bearing is very important. The kiln support roller assembly bears the weight of the whole rotary part (mainly rotary kiln barrel, lining brick, heat exchanger in kiln, material, riding ring and girth gear), and makes the rotary kiln barrel and riding ring rotate smoothly on the support roller. Support roller assemblies can be divided into sliding-bearing support roller set, rolling-bearing support roller set and sliding-rolling bearing support roller set (radial sliding bearing and axial rolling bearing). The rolling-bearing support roller sets can be divided into two types according to shaft rotation and non-rotation, possessing advantages of simple structure, easy maintenance, less friction resistance, less electricity consumption and simple manufacturing. However, because the load of the support roller can reach hundreds of tons, the size of the rolling bearing is large and is limited by the supply conditions. However, with the improvement of industrial technology, rolling bearings will be used more and more in wheel supporting devices.
CHAENG specializes in the production of kiln equipment for many years. The support roller assemblies produced by CHENG adopt rolling bearings. Stress characteristics are: radial force is great; axial force is also very large compared with radial force. Left and right bearing seats are separately set, radial bearings and thrust bearings need to adopt self-aligning spherical bearings. In order to ensure the flexible rotation of the two bearings, the spherical center of the two bearings must coincide at 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 self-aligning 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 to bear both radial and axial forces.
CHAENG support roller specifications:
| Item | Introduction |
| Weight | 7-42 t |
| Material | Carbon alloy, low alloy steel, etc |
| Process | Sand casting, rough machining, semi-finished machining, finished machining |
| Test | Chemical composition, mechanical property, UT/MT and so on. |
| Certificate | ISO9001:2015 |
| Heat treatment | Normalized,Normalized and Tempered, Quench and Tempered. |
| Others | according to drawings and demands |
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