Abstract: With the increasing demand for high-power engineering vehicles, higher requirements have been placed on cooling modules. In the entire air-cooled cooling module, the guide cover system plays a crucial role. To meet market demands and achieve the goals of weight reduction, cost reduction, and efficiency improvement for cooling modules, this paper focuses on the cooling module of a 6 t excavator from a company, investigating its guide cover system. The material of the guide cover system is replaced from carbon structural steel to a glass fiber-reinforced polyamide material. Workbench software is used to conduct modal analysis and strength verification, predicting the inherent properties and application reliability of the product. The results show that the weight of the air guide cover is reduced by 44%, and the protective net by 65%. The optimized guide cover system meets the usage requirements of the entire vehicle, with significant weight reduction effects. Replacing steel with plastic has achieved the goal of cost reduction and efficiency improvement, which holds profound significance for the promotion of new materials and research on lightweight design of cooling modules.

Key words: cooling module; guide cover; simulation analysis; polyamide material

摘要： 随着高功率工程车需求量的增多，对冷却模块提出了更高的要求。在整个风冷的冷却 模块中，导流罩系统起着至关重要的作用，为迎合市场需求，实现冷却模块降重、降本、增 效的目标，文章以某公司 6 t 挖掘机冷却模块为研究对象，对其导流罩系统展开研究，将导流 罩系统的应用材料由碳素结构钢替换为一种玻璃纤维增强的聚酰胺材料，运用 Workbench 软 件进行模态分析、强度校核，预测产品的固有属性及应用可靠性。研究表明，导风罩降重 44%， 护网降重 65%，优化后导流罩系统满足整车使用要求，降重效果明显，以塑代钢，实现了降 本增效的目的，对新材料的推广及冷却模块轻量化设计研究具有深远的意义。

关键词: 冷却模块；导流罩；仿真分析；聚酰胺材料