Abstract
Increasing of rolling and adjacent equipment operation reliability, decreasing of its emergency downtime, increasing of overall periods duration are actual tasks of personal of any sheet-rolling plant.Using data of the register of 2800 HSM of sheet-rolling shop (LPZ-1), JSC “Ural Steel”, the number and duration of downtimes of the mill No. 23 runway analyzed, caused by runway drive tooth coupling failure. The main reasons of tooth coupling failure determined. Modernization of No. 23 runway drives proposed, being its design modification by introducing of cardan shaft for rollers drives. This enabled for giving up the tooth coupling usage, pushing away the electric motors, that avoided water drops and vapor on them hitting, decrease unplanned equipment downtime. Certain parameters of drives determined and calculation of technical and economic indices before and after the runway drives modernization presented. The implementation of modernization actions resulted in a decrease of No. 23 runway repair and maintenance expenses, including the purchase and installation of the tooth coupling. The expenses for No. 23 runway drives modernization made1.7 mil Rubles and the payback period – 6 months.
Highlights
Modernization of No 23 runway drives proposed, being its design modification by introducing of cardan shaft for rollers drives. This enabled for giving up the tooth coupling usage, pushing away the electric motors, that avoided water drops and vapor on them hitting, decrease unplanned equipment downtime
Машиностроение и агрегаты металлургического производства / Н.В
Summary
Момент с учетом потерь на трение в подшип никах при передвижении металла по рольгангу определяем по формуле [10, 11]: Мтр.р = (бы + П р О ^ р ^ п .^ ),. По формуле (2) определяем вес металла, талла: приходящийся на один ролик рольганга:. Находим по формуле (1) момент с учетом по терь на трение в подшипниках при передвиже нии металла по рольгангу: Мтр.р = ^ м + ПрОр)Цп.р(^п.р/2) = (11819,1 + + 1х32078,7)х0,006х(0,225/2) = 29,63 И-м. Момент с учетом возможного буксования ро ликов по металлу при случайном упоре металла в препятствие определяем по формуле [1-12]: М-бук.р бмЦб.р^р^Х (3). Где пр = 1 — число роликов, приводимых от од ного электродвигателя; т р = 3270 кг — масса ро лика; Б р — диаметр инерции вращающейся детали (сплошного ролика), м.
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