Loading of hydraulic excavator implement in bucket movement

The relevance of the study is governed by the need of design offices engaged in engineering of hydraulic excavators in the design justification procedures based on the criteria of reliability and mass reduction. Hydraulic excavators currently in operation in the mining industry, with bucket capacity from 8 to 30 m3, have an essential mass and, consequently, cost. Reduction in mass can be achieved by elimination of excessive factors of safety of the excavator components. The strength calculations need determining effective forces in operation of the excavators. The research is aimed to determine the calculation procedure forces in components of hydraulic excavator implement in bucket movement. Bucket movement is carried out by cylinders of excavator implement from the digging endpoint to the unloading point with the simultaneous rotation of the platform, which actuates concurrently the gravity, centrifugal and inertia forces. The study is performed based on the mathematical modeling of operating process. For a hydraulic excavator with front attachment, the mathematical model is developed for calculating coordinates, velocities and forces in the implement components in bucket movement. The calculation program and algorithm allow investigation sin bucket movement along different trajectories and at different input data.

Bezkorovayny P. G., Shestakov V. S., Yusupov T. I. Loading of hydraulic excavator implement in bucket movement. MIAB. Mining Inf. Anal. Bull. 2021;(11-1):209—218. [In Russ]. DOI: 10.25018/0236_1493_2021_111_0_209.

Bezkorovayny P. G.^1,2, Senior Lecturer at the Department of Mechanics;
Shestakov V. S.², Cand. Sci. (Eng.), Professor at the Department of Mining Machines and Assemblies, E-mail: shestakov.v.s@mail.ru;
Yusupov T. I.², Post-Graduate Student at the Mine Electrification Department;
¹ Karaganda State Technical University, Karaganda, Kazakhstan;
² Ural State Mining University, Yekaterinburg, Russia.

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