Elaboration and testing of a stationary cantilever-rotary crane
Students Name: Seniuk Ruslan Stepanovych
Qualification Level: magister
Speciality: Robotics and Mechatronics
Institute: Institute of Mechanical Engineering and Transport
Mode of Study: full
Academic Year: 2020-2021 н.р.
Language of Defence: ukrainian
Abstract: Lifting machine (LVM) is a device for moving cargo or people in a vertical or close to it inclined plane. The correct choice of lifting equipment is the main factor of normal operation and high efficiency of production. Modern high-performance lifting machines with high speeds and high load capacity have emerged as a result of the gradual improvement of machines over time. Cranes, hoists and winches, in contrast to special machines, are general-purpose machines. Cantilever cranes - jib cranes, the load-grabbing body of which is suspended on a console connected to the column or support part of the crane or on a trolley moving on the console. The group of cantilever cranes includes cantilever crane on a column, wall and mobile. On the basis of the conducted information review in the design part of work the own constructive execution of the console-rotary crane consisting of a vertical basic column on which by means of a rotary knot the arrow is established is offered. The boom consists of two parts: horizontal, along which the telpher moves, and vertical (persistent), which serves to support the boom on a special track mounted on the crane column, and due to the electromechanical drive rotates the boom around the column. The vertical support column of the crane consists of the lower plate, which is used for its installation on the foundation, stiffeners, support track, pipe and the upper board, on which the support-rotary unit of the boom is mounted. The crane is intended for lifting and moving of loads weighing up to 1,5 t. The maximum departure of a hook of the telpher is 4,7 m. The column represents a pipe with a diameter of 530 mm and a wall thickness of 8 mm. The horizontal boom of the crane is made of a profile I-beam 36M. The vertical (stubborn) part of the boom is made in the form of a welded I-beam of variable cross section. The I-beam is welded from sheet details 18 mm thick. The plate of the pivot unit, the upper and lower plates of the column are also made of 18 mm thick sheet. The crane column is mounted on a specially prepared foundation with ten M30 pins. The movement of the telpher along the horizontal boom is limited by two vertical ribs welded between the upper and lower shelves of the I-beam on both sides of its base. The crane drive is provided by a planetary gear motor with an asynchronous electric motor with a nominal power of 0.75 kW and a speed of rotation on the output shaft of 8.7 rpm. The design features of individual elements of the crane are considered: support-rotary unit, support-drive unit, etc. The layout solution of the telpher is developed and its functional features are analyzed. The design of the crane boom is analyzed, the corresponding calculation scheme is developed and the calculation of static reactions in the supports is performed. The cross-sections of the horizontal and vertical sections of the crane boom were calculated from the conditions of bending strength. The cross section of the horizontal section of the boom in the form of an I-beam 36M was selected. Simulation of loading of elements of an arrow of the console rotary crane in the SolidWorks software product is carried out and maintenance of their durability is substantiated. The object of development and research is a cantilever-rotary crane with electromechanical drive. Subject of calculation and research - parameters of loading of elements of an arrow of the console and rotary crane; strength characteristics of the boom and support-drive units. The purpose of work - development of the constructive decision and research of separate parameters of durability of elements of an arrow of the console and rotary crane. Keywords - strength, load, power analysis, hoist, cantilever crane.