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Parametric synthesis of elastic damping devices in digging mechanisms of excavators for open pit mining

Dynamic stresses of excavator attachments are the main cause of loss in reliability of the machines during open pit mining. One of the ways to control dynamics of digging mechanisms is addition of their design with elastic damping devices which reduce total stiffness and increase dissipative forces in the mechanisms. For synthesizing parameters of such devices, it is proposed to use the concept of the inverse dynamic problems in combination with the structural mathematical modeling of mechanical systems. This approach enables generalization of the known designs of damping devices in the form of inverse mechanical coupling, while the concept of the inverse dynamic problem makes it possible to synthesize parameters using a preset law of force variation in a mechanism. The resultant correlations exhibit the analytical connections between the required motion pattern and the mechanical system parameters, and determine the boundaries of physical implementability and efficiency of the study devices. The analytical results are confirmed by the motion equations-based modeling of excavator EKG-5A lifting mechanism equipped with an elastic damping device with the synthesized parameters. It is shown that in this case, in standard operating conditions, the dynamic stresses are reduced, the duration of transient processes is cut-down, and the damping properties of the mechanism are improved.

Keywords: digging mechanisms, dynamic stress, elastic damping devices, inverse dynamic problem, synthesis of parameters.
For citation:

Zyrianov I. V., Iov A. A., Iov I. A., Khramovskikh V. A. Parametric synthesis of elastic damping devices in digging mechanisms of excavators for open pit mining. MIAB. Mining Inf. Anal. Bull. 2024;(4):121-133. [In Russ]. DOI: 10.25018/0236_1493_2024_4_0_121.

Acknowledgements:
Issue number: 4
Year: 2024
Page number: 121-133
ISBN: 0236-1493
UDK: 622.271.4; 62-567
DOI: 10.25018/0236_1493_2024_4_0_121
Article receipt date: 09.09.2023
Date of review receipt: 02.02.2024
Date of the editorial board′s decision on the article′s publishing: 10.03.2024
About authors:

I.V. Zyrianov, Dr. Sci. (Eng.), Professor, Head of Chair, Mirny Polytechnic Institute, Branch of Ammosov North-Eastern Federal University, Mirny, Russia, e-mail: ZyryanovIV@alrosa.ru,
A.A. Iov, Service Engineer, SLC-JH Ltd., Moscow, e-mail: alexander.iov@rambler.ru, ORCID ID: 0000-0003-4684-106X,
I.A. Iov1, Cand. Sci. (Eng.), Assistant Professor, e-mail: iovivan@rambler.ru, ORCID ID: 0000-0003-3980-0681,
V.A. Khramovskikh1, Cand. Sci. (Eng.), Assistant Professorr, Acting Head of Chair, e-mail: wax@istu.edu, ORCID ID: 0000-0003-0590-0393,
1 Irkutsk National Research Technical University, 664074, Irkutsk, Russia.

 

For contacts:

I.A. Iov, e-mail: iovivan@rambler.ru.

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