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CSME 2026/02
Volume 47 No.1
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49-58
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Study on the Meshing Impacts of Gear and Rack Systems of Pumping Machines by SPH-FEM Coupling Method
Xing-Jia Tang a, Mutellip Ahmat b and Fan-Kai Di a
aGraduate Student, School of Electrical Engineering, Xinjiang University, Urumqi 830063, China.
bProfessor, School of Electrical Engineering, Xinjiang University, Urumqi 830063, China.
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Abstract:
This paper aims to explore the adaptability of the SPH-FEM coupling method in simulating gear and rack meshing impacts. Taking the gears and racks of a pumping unit as the research object, the adaptive SPH-FEM coupling method is used to simulate gear and rack meshing impacts. This provides a new approach for studying the impact of gear mechanisms that may involve structural damage. The propagation law of the impact stress is obtained, which reveals the microscopic mechanism of formation of the tooth-face impact wear and deduces that the metal debris generated in the meshing impact process is the main reason for the appearance of tooth surface defects. The results show that the peak residual stresses in section Ⅰ and section Ⅱ are 6.694×10² MPa and 2.935×10² MPa, respectively, after impacting for 0.6 ms, and the error of micro-experiment verification is very small, which indicates that the method is effective.
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Keywords: Gear and rack systems, SPH-FEM coupling method, Meshing impact, Microscopic wear mechanism, Miniaturized modeling experiment
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©
2026
CSME , ISSN 0257-9731
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