| 摘要 |
The invention relates to machine building and can be used for belt conveyers, roller conveyers of the transportation devices used in metallurgical, mining and carbon industry, in the construction roadmachines, in agriculture and other branches of national economy. A roller of belt conveyer contains a drum cowling, a bearing housing with end wall, through the opening of which supporting shaft, bearings, sealing unit are passed, last of which consists of sealing elements in the form of rings and labyrinth pairs of sealing elements, with main annular lugs. The sealing elements in the form of rings are placed between the labyrinth sealing elements and the end wall of bearing housing. One of sealing elements of labyrinth pairs is equipped with additional annular lug executed on side of one of the main annular lugs of mentioned element. The sealing elements of the sealing unit have different modulus of elasticity. The change of the elements of structure and interrelation between them allows to exclude leakage and extrusion of lubricant from the bearing unit of roller and penetration into its cavity of dust and impurities from the environment, that increases reliability and service life.
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