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地下金属矿山道路工况复杂,导致架线式电传动车辆运行时弓头离线率较高。笔者设计了具有多自由度的集电弓,举升臂采用双向浮动支撑,能够与弓头弹簧共同实时补偿过弯和坡道产生的位移。建立了整车虚拟样机,对车轮施加垂向位移以模拟车体在不同路面激振下弓头的离线状况;采用DOE方法,通过计算弓网接触力的均值及标准差,对举升液压缸的等效弹簧刚度与弓头弹簧刚度进行了优化匹配分析。结果表明,匹配优化后的刚度可以保证车辆在不同振幅和频率的激振下,集电弓离线率不大于5%。该设计及优化结果对提高电传动地下矿用汽车可靠性及运输效率具有实际的指导意义。
Underground metal mining road conditions are complex, resulting in wire electric drive vehicles bow bow off line rate higher. The author designed a multi-degree of freedom pantograph, lift arm with two-way floating support, with the bow spring in real time to compensate for cornering and ramp displacement. The vehicle virtual prototype is established and the vertical displacement is applied to the wheels to simulate the bow off-line condition of the body under different road surface excitation. By using the DOE method, the mean and standard deviation of bow contact force are calculated, The equivalent spring stiffness and bow spring stiffness were optimized match analysis. The results show that the optimized stiffness can ensure that the pantograph off-line rate is not more than 5% under different amplitude and frequency excitation. The design and optimization results have practical guiding significance for improving the reliability and transportation efficiency of electric mining underground mining vehicles.