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First name, Middle name, Last name, Scientific degree, Scientific rank, Current position. Full and brief name of the organization, The organization address.Mudrov Alexander Grigorjevich doctor of technical sciences, professor E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it Kazan State University of Architecture and Engineering The organization address: 420043, Russia, Kazan, Zelenaya st., 1
Title of the articleReduction of peak loads when starting the mechanism of lifting the load in the cranes
Abstract.Problem statement. The work of the lifting mechanisms of the load of building cranes refers to a re-short-term operation, which is characterized by the number of inclusions from 60 to 360 per hour, depending on the mode of operation. Each cycle has three periods of operation: start and acceleration, steady motion, braking and stopping. During the periods of starting and braking loads, there are large dynamic loads from the lifting of the load and from the rotating parts of the drive, which negatively affect the strength of the elements of the mechanism and the overload of the drive source. The purpose of the study is to find options for reducing dynamic loads in the lifting mechanism. Results. Calculation of the mechanism of lifting the load according to the specified parameters is carried out. The mathematical values of the dynamic loads from the lifting of the load and from the rotating elements of the drive are determined. It is established that the dynamic moments from the rotating elements of the drive are 19 times greater than those from lifting the load. Practical methods of reducing peak loads by reducing the moment of inertia of the coupler, fabricating it from composite materials and increasing the starting time of the electric motor are shown. Conclusions. The significance of the results obtained for the construction industry is to significantly reduce the effect of dynamic loads during start-up and braking on the elements and source of the drive, and increase the resource of its operation and productivity through the use of composite materials for the manufacture of the coupling.
Keywords.variable linear and angular velocities, acceleration, dynamic loads from variable speeds of lifting and rotation of drive elements, composite materials.
For citations:Mudrov A.G. Reduction of peak loads when starting the mechanism of lifting the load in the cranes // Izvestiya KGASU. 2018. №2(44) P.239-245.


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