防爆胶轮车发动机动力性研究及试验

针对现有矿用防爆胶轮车在巷道内运行过程中存在动力不足和燃油不充分问题,提出利用动力学理论模型和试验相结合的方法,分析最佳动力性、油耗及其能效。首先根据实际工况进行了发动机的选型,再利用MATLAB软件中的线性回归法得出最理想的四阶拟合曲线方程,建立了发动机的数学模型。基于该模型搭建了防爆胶轮车动力系统模型并对爬坡度、加速度和经济性进行了分析。最后进行了动力性试验,将试验得出的万有特性曲线与仿真对比研究。试验结果表明:该型号发动机转速1800r/min时为最佳经济性及动力性区域,最低油耗为222g/k W·h,由此建立的发动机数学模型及胶轮车动力系统模型是准确的,为后续的发动机研究和整车动力匹配奠定了基础。

Research on Engine Characteristics of Explosion-proof Rubber-tyred Vehicle

Aiming at the problem of insufficient power and insufficient fuel in the operation of existing mine explosion-proof rubber tire vehicles in the roadway, a combination of dynamic theory model and test method is proposed to analyze the optimal power, fuel consumption and energy efficiency. Firstly, the engine parameters were selected according to the actual working conditions. Then the linear regression method in MATLAB software was used to obtain the optimal fourth-order fitting curve equation, and the mathematical model of the engine was established. Based on the engine model, the dynamic system model of the explosion-proof rubber tire vehicle was built and the grade, acceleration and economy were analyzed. Finally, a dynamic test was carried out, and the universal characteristic curve obtained by the experiment was compared with the simulation. The test results show that the engine speed is 1800r/min, which is the best economic area and the best power area. The minimum fuel consumption is 222g/kWh. The mathematical model of the engine and the rubber wheel vehicle power system model are accurate. It laid the foundation for subsequent engine research and vehicle power matching.