Numerical study of dynamic contact loads in an eccentric-cycloidal transmission of a transport conveyor drive used in the mining industry
Численное исследование динамических контактных нагрузок в эксцентрико-циклоидной передаче привода транспортирующего конвейера, применяемого в горной промышленности
Tatybaev M.K. Saidinbayeva N.D. Seiitkazy N.S. Assan A.E.
2025North Caucasian Institute of Mining and Metallurgy, State Technological University
Sustainable Development of Mountain Territories
2025#17Issue 31630 - 1641 pp.
Introduction. Eccentric–cycloidal gear reducers represent a promising type of drive for mining conveyor equipment due to their high shock resistance, multi-tooth load distribution and tolerance to contamination. However, the dynamic behavior of the contact interaction between the eccentric tooth and the cycloidal wheel has not been sufficiently quantified. This limits their large-scale implementation in heavy industrial environments. A detailed analysis of vibration stability, contact force patterns, and geometric conformity of the tooth profile is required to assess operational reliability. Purpose of the study. The aim of this research is to perform a numerical investigation of dynamic contact forces and vibration processes in an eccentric–cycloidal gear reducer used in mining conveyor drives and to evaluate the geometric conformity of the transmission by means of spectral and time-domain analysis. Materials and methods. A multibody dynamic model was developed in MSC Adams. The reducer geometry was imported from Autodesk Inventor, including real bearing parameters, material properties, inertial characteristics, and kinematic constraints. The tooth contact was described using a nonlinear Hertzian model with damping and Coulomb friction. Simulations were performed at an input speed of 750 rpm, gear ratio i = 9 and load torque of 2 kN·m. Vibration acceleration, contact force histories, frequency spectra, and impulse loads during tooth engagement were analyzed. Results. The acceleration of the eccentric shaft reached 350 mm/s2due to local oscillations in bearing units, while vibrations in the gear mesh were effectively damped to 0.004 mm/s2. The contact force exhibited a pronounced impulse of approximately 300 N during tooth engagement. Frequency analysis revealed a single dominant harmonic corresponding to the meshing frequency, without additional resonance peaks, indicating high geometric conformity of the cycloidal profile. The minimal contact area reduces the likelihood of pitting and surface chipping. Discussion. The results demonstrate high vibration resistance of the eccentric–cycloidal transmission and its suitability for mining conveyor applications with variable dynamic loads. The impulse nature of the contact force was quantified and shown to be within acceptable limits. Validation on a laboratory conveyor confirmed the accuracy of the numerical model and uniform motion transfer without phase delays. Conclusions. The investigated gear reducer exhibits low dynamic losses, stable load transfer and high vibration resistance. Numerical simulation confirms its potential for reliable operation in mining conveyor drives and its feasibility for replacing traditional gear systems under harsh industrial conditions. General conclusions. The eccentric–cycloidal reducer demonstrates favorable dynamic behavior, with low contact stresses and absence of detrimental resonant harmonics. The results support its further industrial implementation and optimization. Practical significance and future research. The findings may be used for designing energy-efficient conveyor drives, optimizing cycloidal tooth profiles, estimating fatigue life and developing digital twins of gearbox systems. Future research should focus on wear modeling, shaft misalignment effects, and thermo-mechanical behavior of the gear mesh.
Adams MSC , conveyor drive , dynamics , eccentric-cycloidal transmission , Hertzian contact; geometric consistency , numerical models , vibration
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K.I. Satbayev Kazakh National Research Technical University, Almaty, Kazakhstan
Kazakh Automobile and Road Institute named after L.B. Goncharov, Kazakhstan
K.I. Satbayev Kazakh National Research Technical University
Kazakh Automobile and Road Institute named after L.B. Goncharov
10 лет помогаем публиковать статьи Международный издатель
Книга Публикация научной статьи Волощук 2026 Book Publication of a scientific article 2026