Abstract:According to structural characteristics of electro-mechanical-hydraulic cutting transmission system of a coal cutter, an electro-mechanical-hydraulic coupled model was built for the transmission system including gears and pumps with flow fluctuation of piston pumps as the system’s external excitation and time-varying meshing stiffness of gear pairs as the system’s internal excitation. Then dynamic characteristics of the transmission system were analyzed under the external excitation and internal one. The results showed that the flow fluctuation of pumps affects vibrational and dynamic characteristics of the transmission system; as external excitation, the flow fluctuation is the main factor affecting the system’s dynamic characteristics; after considering the flow fluctuation, the motor output reveals torque fluctuation, the total efficiency of the cutting transmission system drops.
杨阳1 2 袁瑷辉1 李国伟1. 基于周期性激励的采煤机机电液截割传动系统特性分析[J]. 振动与冲击, 2018, 37(3): 217-222.
YANG Yang1 2 YUAN Ai-hui1 Li Guo-wei1. Dynamic characteristics of electro-mechanical-hydraulic cutting transmission system of a coal cutter under periodic excitations. JOURNAL OF VIBRATION AND SHOCK, 2018, 37(3): 217-222.
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