Segmented Ring Gears Have No Size Limit


Finnish firm Moventas says it specializes in the design and manufacture of multi-segmented ring gears used to rotate large drums, kilns and mills of diameters from 3 m and more, with no upper size limit due to the company’s unique manufacturing process. With more than three decades of experience building large multi-segmented spur gears, Moventas has developed a multi-segmented helical ring gear that represents a continuation of the multi-segmented ring gear concept originally developed by the company for new installations and replacements in heavy-duty mineral processing applications. According to the company, the multiple segment design of its ring gears enables higher machining precision with more accurate tooth geometry. The length and number of segments depends on the gear diameter and is optimized for each application. The segments are bolted together to make large-diameter gears, resulting in a significant reduction in manufacturing lead times and fast installation. The company says gear wear is minimized by using Austempered Ductile Iron (ADI) material, which contributes to a high strength/weight ratio required for heavy industrial use. Highly accurate production and assembly techniques minimize vibration, contributing to lower lifecycle costs. Additionally, the segments are easier and less costly to transport, and individual segments are easy to replace when compared with traditional large castings. Moventas designs and delivers the complete package, including auxiliary drives, main reducers/gearboxes and bedplates. Full life-cycle support is augmented by a range of services with a strong focus on condition management and proactive maintenance.

www.moventas.com

As featured in Womp 08 Vol 9 - www.womp-int.com