153S-1 153S-1 scraper blade factory direct wholesale price transom bolts Accessories] [Benniu scraper scraper conveyor sprocket assembly with thin oil lubrication oil lubrication manner conducive to bearing lubrication and cooling, using for a long time, easy maintenance, sprocket assembly seal failure is the main reason for the oil spill, the sprocket assembly seal failure following main reasons. (1) Transportation and installation lead to seal failure, scraper conveyor sprocket bearing sets for thin-walled parts, sprocket assemblies in the transport and installation process, if the improper handling can lead to seal failure and oil spills. (2) affected the working environment, the sprocket assembly is basically a work in slime, coal has some corrosion and mobility. Full rotation of the sprocket and bearing coal, floating metal lip seal chamber wear, Ο-ring to permanent plastic deformation, loss of elasticity and failure. (3) the influence of the structure of the seal in the form of floating oil from two identical shape wear-resistant metal seal ring, Ο-ring and with the support chamber composed of parts, sealing ring rotates, face contact to form a seal surface, Due to various parts of the bearing size error exists, bearing the sample size given bearing width control tolerance -0.508 ~ + 0.711 mm, the axial dimension difference of more than 1 mm. The seal ring and O-ring is not the performance of different batches of the same, there are some differences, resulting in sealing contact surface of the pressure change is large, difficult to control, the seal ring contact surface is difficult to form a stable oil film. To prevent leakage of the initial sprocket assembly, had to increase pressure on the seal ring wear and Ο-ring leak causing accelerated aging.