Пути повышения надежности работы механизма изменения вылета портальных кранов

Abstract

The existent directions and methods of improvement of portal cranes derricking mechanism are considered. There are problems of upgrading of existing derricking mechanism structures. The solutions thereof are being considered on the basis of the analysis of kinds and consequences of operational failures and experimental data as well. A mathematical model has been developed to research and appraise the influence of portal crane derricking mechanism rack working travel full-circle portal crane 16/20/ 32-36/28/20 on the efforts in the elements of metal cranes. The following is a comparative analysis of rack loads depending on the working path and luffing. The proposed constructive decision allows solve a problem of uncontrolled dynamic loads by crane upgrading. The obtained with modeling results can be used by design new cranes and by researching of the duty of derricking process with capacity of rack geometrics variation.