Abstract
Problem. The analysis of existing research and publications in which the main problem is highlighted, namely, that many factors are not taken into account when calculating the inertial loads of the car crane arrows. Accounting for these factors will allow you to more accurately determine the inertial loads of the boom of the car crane, to carry out strength-hunches of the elements of the boom and the selection of components of its drive mechanisms. Goal. The purpose of the work is to determine the inertial navan-loads acting on the load and arrow of the automobile-side crane during the unstable movement of its. Methodology. To calculate the inertial loads, the technique of determining the total inertial loads of the car crane boom during joint operations in accordance with the Safety Regulations has been developed. Total inertial loads were determined for the following cases: joint lifting (lowering) of cargo and arrows; lifting the load and turning the boom; lifting and turning the arrow. Results. The resulting dependencies for determining the inertial loads of the rotary boom of the car crane will allow more accurately taking into account multiple factors to calculate the values of these loads in order to conduct strong calculations of the boom, the selection of its components mechanisms. Originality. When calculating inertial loads, the weight and length of the boom are taken into account; weight and height of lifting of cargo; the radius of the arrow crane; rotation speed of the rotary part of the crane; speed of movement of cargo and arrows; start time and braking of cargo lifting mechanisms, change of departure and turn of the boom. The advantage of this technique is its originality. Practical value. The use of this technique allows more accurately taking into account multiple factors to determine the values of the inertial loads of the automobile crane during the unstable movement of the cargo lifting mechanisms, changes in the discharge of the boom and its rotation in order to conduct strong-standing calculations of the boom elements, the selection of its components.
Highlights
Loading and unloading works are an integral part of the technological process of construction
Among the elements of the crane construction, a crane's booms is an important place which it's of characteristics and technical condition depends on the safety technique in the performance of loading and unloading operations and the prevention of trauma of the maintenance staff
The purpose of the work is to determine the inertial loads acting on the load and the telescopic boom of the car crane when its mechanisms are unstable
Summary
Loading and unloading works are an integral part of the technological process of construction. Cranes and lifting mechanisms are mainly used to perform these works. Car cranes occupy the largest share of cranes used in construction, the main advantage of which is high mobility [1]. Mobile wheel cranes are used with mechanical, hydraulic and electrical drives of working equipment, with booms of constant length or with insert parts, retractable and telescopic. Most often used car cranes with hydraulic drive and telescopic arrow. Among the elements of the crane construction, a crane's booms is an important place which it's of characteristics and technical condition depends on the safety technique in the performance of loading and unloading operations and the prevention of trauma of the maintenance staff. The booms with a straight axis and an adjustable value of its departure are most widely used in automobile cranes [2]
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