ВДОСКОНАЛЕННЯ ПРИСТРОЇВ ЗАХИСТУ РОБОЧИХ ВУЗЛІВ ГРЕЙФЕРІВ.

Reliable operation of ship and shore cargo handling equipment during bulk processing using cranes with clamshell suspension is provided by the appointment of the crane operation mode and maintaining the technical condition of its elements and assemblies. In the context of increasing volumes of bulk cargo transportation by sea and the development of these cargo flows by modern specialized of ships. An analysis of the operation of a ship crane with a clamshell suspension showed that the cargo suspension with a clamshell is vulnerable leading to malfunctions. Diagnostic processes do not always reflect the destructive processes in its elements at the early stages, therefore, the main measures to increase the crane's productivity are to improve the circuit of technical solutions of clamshell units. vessels, an urgent problem is the reduction of parking time due to increased productivity of handling equipment. Of the whole range of bulk cargo, lumpy rock cargo is considered difficult to handle, therefore the work-ing elements of cargo grabs for severe operating conditions were analyzed. In this situation, the use of the classic vibration damping device, which is based on the use of a spring damper, has several disadvantages for the sea, with the need for additional connecting elements of the working bodies with the damper and the cost of repair work to replace the springs. The use of a damping device with additional rods and a hydraulic cylinder-damper has a vulnerability of the rod and sealing elements from shock loads, which are typical for work at sea. The recommended circuit solution is a device for damping oscillations of a cargo grab, the base of which is mounted on the working bodies of the grab, and which differs in that the base contains torsion shafts that rotate in rolling bearings, on the one hand through the splined bushings fixed in the base, on the other hand contain paddle shock absorbers and rigidly mounted with racks which are mounted with a traverse of a grab. Combination of torsion shafts and vane hydraulic shock absorbers provides damping of destructive oscillations at all stages of the working cycle of the grab. [ABSTRACT FROM AUTHOR]