大吨位车辆传动轴电磁制动与半轴湿式制动集成系统设计及开发

Design and Development of the Transmission Shaft Electromagnetic Brake and Half Shaft Wet Brake Integrated System in Heavy Vehicle

为了解决传统大吨位车辆制动系统的制动效能不稳定、安装布置空间局限性大等问题,提出了在驱动桥动力输入轴处布置传动轴电磁制动器和在整体式驱动桥内部布置半轴湿式制动器的集成系统方案,通过对装置结构布置方案和工作原理分析,建立了制动集成系统数学模型,并通过实验对制动集成系统进行可行性验证。实验表明,半轴湿式制动器制动力矩总体呈现增加趋势,制动末期制动集成系统制动转矩完全由半轴湿式制动器提供,而传动轴电磁制动器制动转矩先增后减,制动结束后制动转矩变为零;制动集成系统制动转矩随半轴转速降低而降低,期间均存在一定的波动现象;制动集成系统联合制动过程能够明显降低湿式制动器负荷,并将油液温度控制在一个合适的变化范围内。

In order to solve the traditional heavy vehicle braking system braking performance are not stable, installation space limitations, a brake integrated system scheme through arranging electromagnetic brake on the drive axle dynamic input shaft and layout wet brake Inside the integral drive axle is proposed, the mathematical model of integrated brake system is established through the analysis of the layout scheme of device structure and working principle, and through the experimental methods to verify the feasibility of integrated brake system. The results show that the half shaft wet brake torque presents increased trend, at the end of the braking, the brake torque of the brake integrated system is provided solely by the half shaft wet brake, the electromagnetic brake torque first increased and then decreased, the torque at the end of the braking become to zero; the brake integrated system braking torque decreases with the half shaft speed decreases, a certain fluctuation exists during the period; in the braking process of brake integrated system, the wet brake load can be significantly reduced and the oil temperature can be controlled in a suitable range.