Тип публикации: статья из журнала
Год издания: 2019
Идентификатор DOI: 10.12737/article_5d5fcf0c6c92d2.74743996
Ключевые слова: thread inspection, eddy current, cracks in thread, non-destructive testing, mechanization, scanner, mining machines, technical state, dragline excavators, diagnosis, acoustic emission
Аннотация: Представлены результаты исследований по оценке возможности мониторинга состояния несущих элементов металлоконструкций экскаваторов - драглайнов на примере модели ЭШ-20.90 с использованием метода акустической эмиссии. The article describes the research into the feasibility of monitoring operation of load-bearing metal structures of Показать полностьюdragline excavators [in terms of walking dragline excavator ESH-20/90] based on the acoustic emission method. Efficiency of equipping high-performance excavators with monitoring system for early detection of eventual failure points in metal structures and for prevention of accidents by that is substantiated. It is proposed to carry out monitoring using the nondestructive testing method of acoustic emission, well-reputed in other branches of industry and having a high potential in the dynamic equipment control. During the research, the on-stream diagnosis of ESH-20/90 dragline excavator was carried out using the method of acoustic emission. From the research data obtained in the active excavator, the main sources of acoustic noise affecting the monitoring accuracy were identified. The frequency band for the recording of acoustic emission at the optimal signal/noise ratio was selected. The most defect-prone elements of load-bearing metal structures of the excavator were identified. The failure location capability was proved for the elements operated in the conditions of increased noise and high dynamic loading.
Журнал: В мире неразрушающего контроля
Выпуск журнала: Т. 22, № 3
Номера страниц: 18-21
ISSN журнала: 16093178
Место издания: Санкт-Петербург
Издатель: Общество с ограниченной ответственностью "Свен"