【摘要】 针对寒冷地区电液制动器制动力和制动力矩不足等导致水闸制动系统发生溜车问题，基于液压油Vogel黏温模型以及当地温度变化数据，构建了油液黏度随时间变化的黏度-时间模型，并基于该模型对电液制动器制动过程中油液流动特性进行了研究，然后对电液制动器制动性能进行了定量分析。结果表明：在制动过程中，电液制动器液压油压力主要分布在活塞底腔，且随着黏度增大而逐渐增大，当油液黏度为662.4 Pa·s时，压力达到1.455×10^-3 MPa,电液制动器液压油在叶轮中心轴部位会出现涡流循环，其循环强度随着油液黏度的增加而逐渐增加；在给定工况下，该电液制动器的最小制动力为1098 N,最小制动力矩为274 N·m。而这一制动力矩已低于该电液制动器工作力矩范围，此时可以通过更换该月份黏度更小的液压油或增设预加热系统等措施来提高其制动力和制动力矩，从而实现正常制动。更多还原

【Abstract】 Aiming at the sliding problem of the brake system caused by insufficient braking force and braking torque of the electro-hydraulic brake in the cold regions, based on the oil Vogel viscosity-temperature model and the local temperature change datas, an oil viscosity-time model was constructed. Based on this model, the electro-hydraulic brake oil flow characteristics in the braking process are studied. Then the braking performance of the electro-hydraulic brake is quantitatively analyzed. The results show that in the braking process, the hydraulic oil pressure of the electro-hydraulic brake is mainly distributed in the piston bottom cavity, and increases gradually with the increase of the viscosity. When the oil viscosity is 662.4 Pa·s, the pressure reaches 1.455×10^-3 MPa. The eddy circulation of the hydraulic oil appeared in the impeller central shaft, whose intensity gradually increases with the increase of the viscosity. Under the given working conditions, the minimum braking force and braking torque of the electro-hydraulic brake are 1098 N and 274 N·m, respectively. This braking torque is lower than the working torque range of the electro-hydraulic brake. Therefore, the braking force and braking torque can be improved by replacing the hydraulic oil with smaller viscosity in the month or adding a pre-heating system, so as to realize normal braking.更多还原