DFMEA在车用燃料电池空压机设计中的应用

Application of DFMEA in Air Compressor Design of Fuel Cell Vehicles

氢气具有资源丰富、热值高和无污染等特点,因而是燃料电池汽车最理想的二次能源。空压机作为燃料电池汽车的关键总成,掌握其核心部件的设计和制造技术非常必要。应用传统的设计方法进行相关零部件如空气轴承、压气叶轮、外壳等开发容易出现精度、可靠性及寿命等问题,导致反复修改提高了研发的成本,因而在零部件设计中引入设计潜在失效模式及影响分析(DFMEA)等分析理论有助于提升设计的合理性。论文首先回顾DFMEA的产生背景、分类及在汽车行业的应用现状,其次分析了使用时存在的问题,最后以DFMEA在空压机核心零部件设计中的应用为例,评估了设计的风险并给出了改进的建议。相关研究有助于提升车用燃料电池空压机的设计水平,进一步缩小与国外的技术差距,促进燃料电池汽车的快速普及。

Hydrogen is of the outstanding characteristics including abundant resources, high calorific value and no pollution, so it is the most ideal secondary energy for fuel cell vehicles. Considering air compressor is viewed as the key assembly for the fuel cell, it is extremely significant to master the design and manufacturing technology for the core components. In fact, the application of traditional design methods frequently leads to problems such as accuracy, reliability and life during the development process for the air bearings, compressor impeller, shell, etc., and the cost is increased distinctly by the repeated modifications. Hence, design potential failure mode and effects analysis(DFMEA) and other advanced analysis theories are introduced to improve the rationality of design.Firstly, the background, classification and application status of DFMEA in automobile industry are reviewed. Secondly, the existing problems in using DFMEA have been investigated. Finally, DFMEA is applied in the design of core parts of compressor, and the risk of design is evaluated and thus several improvement suggestions will be offered. Relevant research in this study is crucial to promote the design level of the air compressor for fuel cell vehicle, exerting a beneficial effect on reducing the technical gap between domestic and oversea and accelerating the rapid popularization of fuel cell vehicles.