The Research And Design Based On The Rollers Of3#Slab Casting Machine

Fan’s caster is an important part of the caster, including arc segment, straightening, level and basic framework supporting structure etc, arc segment, fan, straightening, the overall level of roller, densely, which is cooled through internal cooling water. Our3rd slab fan-shaped section in use appear serious water leakage phenomenon, which is due to the relative motion and lateral&lengthways angle that usually damage rubber gasket in sealing function among the sectioning rollers in the process of steel rolling for the design reason after the site verification and analysis. In the meantime, the production rhythm speeding up, meet the low cost requirement, avoid to frequently replace and maintain the fan section, also make sure the production quantity and quality, and cost saving, we need make the reasonable design improvement on link form among slab continuous casting machine fan section roller.This paper makes the summary about the current status of our3#slabcaster fan in our factory, which is produced by CERIS。 The size of section is180×1050～1600m,200,250×1050～1600m, the actual production volume is1MT/year. It has high production efficiency in these years, however, design defects gradually appear, for example the one is leakage between tilting fillet in the fan. The soft water recharge can reach20MT/day while the fan changes10times as leakage every year. Based on actual production, make the analysis of the root cause of leakage, and double check the drawing, anatomize the structure of foot roll, and ascertain that there is design defect in the roll of the fan. The loose roll in the fan of3#slab is section roll, the long and the short is contacted by the core retainer plate sealed by two "O Rings" in the end. The2separate loose roll are sustained by the tilting fillet. Due to not the axes between the loose roll, the long roll and the short roll can bring in relative motion, then"O Rings" can be easily abraded and fall off to leakage.On the basis of relative information and combine the test and the production practice, the point of the design line in my paper is surrounded by relative motion whether the long and the short roll have. Firstly, avoid the relative motion between the two part, then the seal ring can’t be abraded to prevent the leakage happening. Secondly, enable the relative motion, but re-design the seal ring to avoid the attrition or rotary joint connector. After several reasonable project design, combine theory with practice to determine the best reformation project, and make the last local perfect to fit the request of the production, so resolve the leakage completely in the roll of the fan to improve the service life of the foot roll and the fan and the function of the fan and also improve the driving dynamic rate of the slabcaster to raise the production rate.