目前变速箱仿真载荷谱的相关研究对驾驶员意图考虑不足,难以全面反映变速箱挡位的受载状态。为了提高变速箱可靠性分析的准确性,以装备12挡变速箱的矿用车辆为研究对象,在动力性与经济性换挡规律的基础上,充分考虑不同车速的许用挡位,提出一种考虑挡位组合策略的多挡变速箱仿真载荷谱获取方法。基于矿用车辆行驶工况,采用所提方法获得了多挡变速箱仿真载荷谱,并与基于动力性或经济性换挡规律获得的仿真载荷谱进行对比。结果表明:与基于换挡规律获得载荷谱的传统方法相比,所提方法得到了不同的危险挡位。传统方法得到的危险挡位是6挡,工作时间占循环工况的53.25%,载荷区间为2000~2400N.m时占比最大,为53.14%,所提方法得到的危险挡位是7挡,工作时间占循环工况的54.49%,载荷区间为2400~2800N.m时占比最大,为52.78%；从载荷累积量的角度可发现,所提方法得到的7挡载荷累积量较传统方法得到的6挡载荷累积量增加了2.33%。研究结果证明了所提方法的有效性,为多挡变速箱可靠性设计奠定了基础。

The current transmission simulation load spectrum is difficult to fully reflect the load state of the transmission gear because of considering driver’s intention is not fully. In order to improve the accuracy of transmission reliability analysis, a mining vehicle equipped with a 12 speed gearbox is taken as the research object. Based on the shifting rules of power and economy, a multi speed transmission simulation load spectrum acquisition method considering gear combination strategy is proposed by fully considering the allowable gears of different vehicle speeds. based on the driver conditions of mining vehicle, the proposed method was used to obtain multi-speed transmissions simulation load spectrum, and compared with the simulation load spectrum obtained based on power and economic shifting schedule. The result show that compared with the traditional method of obtaining load spectrum based on shifting schedule, the method was proposed obtain different dangerous gears. The dangerous gear obtained by traditional method is 6th gear, with a working time accounting for 53.25%, the proportion is highest in the load range of 2000~2400N.m, with 53.14%. the method was proposed obtain the dangerous gear is 7th gear, with a working time accounting for 54.49%, the proportion is highest in the load range of 2400~2800N.m, with 52.78%. From the perspective of load accumulation, it can be observed that the load accumulation of the proposed method obtain 7th gear increases 2.33% compared with the load accumulation of the traditional method obtain 6th gear. The research result prove the effectiveness of the proposed method and lay the foundation for the reliability design of multi-speed transmissions.

U463.212??????

江苏省科技成果转化专项资金项目（BA2022033）；江苏省双创团队项目（JSSCTD202239）