Особенности динамических процессов в прокатных станах и их диагностические свойства

Abstract

Приведены некоторые результаты измерений момента сил упругости в главных линиях клетей прокатных станов и вибрации оборудования при захвате полосы валками. Установлен ряд особенностей переходных процессов, связанных с технологией прокатки и состоянием оборудования. Получены и обоснованы новые информативные и диагностические признаки. Впервые предложено и обосновано в качестве диагностического признака использовать время запаздывания реакции участков линии привода на ударную нагрузку. Разработаны и в промышленных условиях опробованы новые методы и способы диагностики угловых зазоров.

The results of measurements of the elastic force moment in the main line of the drive stand of rolls and equipment vibration when biting of band by rollers are provided. A number of features of transients associated with the technology of rolling and condition of the equipment is identified. New symptoms and diagnosis information are received and justified. For the first time the usage of time delay reaction in the biting of band rollers is proposed and justified as a diagnostic indicator. The time delay depends on the equipment wear and corner clearance. The larger the angular clearance the greater the delay time. Time lag is defined by signals of measurement of torque on the driving shafts, and by the vibration sensors. The sensors are mounted on a rolling stand and frame along the main line of the drive stand of rolls. The regularities of changes in the dynamic coefficient and delay time of the drive stand of rolls with the wear and angular clearances on the spindle and motor areas are set. New methods and ways to diagnose angular clearances based on measuring the moment of elastic force and vibration equipment are developed and tested in an industrial setting. An algorithm for diagnosing the technical condition of the spindle and motor areas as measured transients is developed. The method is recommended for systems of vibration diagnostics development.