Authors: A.P. Komissarov, V.S. Shestakov, R.S. Nabiullin

Title of the article: Research of loading of working equipment of hydraulic excavator «Back shovel»

Year: 2021, Issue: 6, Pages: 15-20

Branch of knowledge: 05.05.06 Mining machines

Index UDK: 622.271

DOI: 10.26730/1816-4528-2021-6-15-20

Abstract: The article explores the possibility of increasing the efficiency of the operation of hydraulic excavators by choosing rational parameters, on which the cost of mining significantly depends. When designing excavators, the parameters of the working equipment: the dimensions of the sections of the boom, stick and bucket are determined according to the strength conditions in which the calculations of stresses are performed based on the design forces. Unreasonably set values of forces in such calculations lead in some cases to an increase in the mass of the working equipment, or to the destruction of elements during operation. The values of the efforts during the execution of the working process vary widely depending on the position of the bucket in the working area, depending on the resistance on the teeth of the bucket. Having determined the exact values of the forces, it will be possible to set the cross-sections of the elements without excessive safety margins and thereby reduce the weight of the boom and stick. With a decrease in the weight of the boom and handle of the working equipment, it will be possible to increase the bucket capacity and thereby the performance of the excavator. Purpose of the work: development of a methodology for determining the loads on the working equipment when performing work operations. Research results. For a hydraulic excavator with "backhoe" working equipment, a mathematical model has been developed for calculating forces when digging and transporting a bucket, an algorithm and a program in an algorithmic language that allow determining possible forces in the elements of working equipment within the working area. The mathematical description allows you to determine the values of the forces on the rods of the hydraulic cylinders to ensure the required digging force and during transportation. The force values are used in the subsequent strength analysis.

Key words: hydraulic excavator working equipment boom stick bucket hydraulic cylinder digging transportation

Receiving date: 13.11.2021

Approval date: 03.12.2021

Publication date: 24.12.2021

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