Study of the spatial distribution of forces and stresses on wear surfaces at optimization of the excavating part of an earthmoving machine transverse profile
Kyznetsova V.N. Savinkin V.V. Ratushnaya T.Yu. Sandu A.V. Vizureanu P.
February 2021MDPI AG
Coatings
2021#11Issue 21 - 16 pp.
The relevance of this research lies in the need to develop a scientifically-grounded methodology for designing the optimal profile of the contact frontal surface of an energy-efficient earthmoving machine operating device, which ensures the redistribution of resistance forces along the cutting elements during the excavation of frozen soil when extracting hydrocarbons. The relevance is confirmed by the need to improve domestic methods for designing the profiles of effective operating devices, ensuring the excavation of frozen soils during the laying of oil and gas pipelines and geological exploration in permafrost areas. Increasing the energy efficiency and service life of highly loaded ripper teeth is done by optimizing the geometric profile and designing a spatial shape that provides minimal resistance to cutting the soil. The object of the research is the process of dynamic interaction of the ripper tooth cutting profile with the frozen soil environment. The research method used was kinematic analysis and force calculation. The cyclic process of dynamic loading of the ripper operating device was investigated. The methodology of system analysis, as well as the method of distribution of resistance forces over the geometric elements of the cutting edge, were used. The mathematical apparatus has been effectively applied to establish the dependences of the change in energy and power properties on performance indicators, soil rheology, and dynamic loads of the ripper tooth. The process of interaction of the ripper tooth tip with frozen soil was investigated. A method for substantiating the design parameters of the operating device by using Legendre polynomials was proposed. Separate calculation results subject to the introduced re-strictions were presented for the condition for solving the problem. The optimal parameters of the transverse profile of the contact frontal surface of the earth-moving machine operating device were determined taking into account the coefficient of reducing the fracture resistance of frozen soils.
Earth moving equipment , Frozen soil , Mathematical model , Optimization , Overburden operations , Resistance , Ripper effective profile
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Faculty of Oil and Gas and Construction Engineering, Siberian State Automobile and Highway University, 5 Mira Avenue, Omsk, 644080, Russian Federation
Transport and Mechanical Engineering Department, M. Kozybaev North Kazakhstan University, 86, Pushkin Street, Petropavlovsk, 150000, Kazakhstan
Faculty of Materials Science and Engineering, Gheorghe Asachi Technical University of Iaşi, Boulevard D. Mangeron, No. 51, Iasi, 700050, Romania
Romanian Inventors Forum, Str. P. Movila 3, Iasi, 700089, Romania
National Institute for Research and Development for Environmental Protection INCDPM, 294 Splaiul Independentei, Bucharest, 060031, Romania
Faculty of Oil and Gas and Construction Engineering
Transport and Mechanical Engineering Department
Faculty of Materials Science and Engineering
Romanian Inventors Forum
National Institute for Research and Development for Environmental Protection INCDPM
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