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为了提高XG953型装载机的热平衡性能,针对机罩的原结构和几种改造结构,利用计算流体力学(CFD)技术,计算分析了机罩内冷却风流场,探索了准确计算流场的方法,获取了流动的细节数据,分析了原结构及改造结构中风道对冷却风的影响。由此可知,在满足改造工作量小、成本较低的要求下,采用封堵或尽量减小散热器周边间隙以及机罩出风口尽量靠上部的改进措施,可明显提高散热效果。对合理设计机罩及冷却风流道,改善整机热状态具有较大的指导意义。
In order to improve the thermal balance performance of XG953 loaders, aiming at the original structure of the hood and several reformed structures, CFD technology was used to calculate and analyze the flow field of the cooling wind in the hood and explore the method of accurately calculating the flow field. The details of the flow were obtained, and the influence of the air ducts on the cooling air in the original structure and the retrofit structure was analyzed. This shows that to meet the transformation of small workload, lower cost requirements, the use of block or minimize the heat around the gap and the hood outlet as far as possible by the upper part of the improvement measures can significantly improve the cooling effect. The reasonable design of the hood and cooling air runner to improve the thermal state of the whole has great guiding significance.