Fuel cell is the core technology of fuel cell electric vehicle, and it is also a hot technology hotspot in the world. Fuel cell special air compressor is one of the key technologies of fuel cell. It not only needs to meet the structural design of oil-free lubrication but also its Very strict requirements are imposed on the weight, volume, variable speed operating characteristics, and dynamic response to changes in stack parameters.
According to the technical research status of the international air compressors for automotive fuel cell engines, combined with the actual situation in China and the specific requirements of the "863" project, the researchers of the university who undertake the project have two types of structure: scroll and screw. The thermodynamic and dynamic analysis of the oil-free lubricating compressor was carried out, and the mathematical model of the compression process was established. The factors affecting the volumetric efficiency and the efficiency of the whole machine were analyzed. The sealing measures of the oil-free lubricating structure and the friction reduction were proposed. The method of work. After the initial prototype development, test analysis, prototype improvement, performance testing and other aspects, the prototype performance of the compressor developed over the past two years met the requirements of the project, and the overall performance test of the prototype was carried out by the Dalian Institute of Chemical Physics of the Chinese Academy of Sciences.
The scroll air compressor for 50 kW fuel cell engine developed by Xi'an Jiaotong University and the screw air compressor for 100 kW fuel cell engine have completely independent intellectual property rights and can work normally without any lubricating medium. The cleanliness requirement of the compressed gas is satisfied, and the reaction product of the fuel cell, water, can be used as a cooling medium to obtain higher compression efficiency.
In the research process of the project, 3 patent applications were applied, of which 1 was authorized and 2 were utility model patents; 8 were graduated. Professor Xing Ziwen, Professor Shu Pengcheng, Dr. Zhao Yuanyang (Lecturer), Dr. Wu Huagen (Lecturer), Senior Engineer of Bu Gaoxuan, Associate Professor Li Zhiwen, Associate Professor Wang Zhizhong, Lecturer Zhang Wei, Ming Chenghui Technician, Song Huxin Senior Engineer and Graduate students Li Jianfeng, Yang Qichao, Gao Xiguang, Hui Dengfeng, Yuan Qiang, etc. participated in the research of this topic. Tongji University and Shanghai Aninda Drive Technology Co., Ltd. participated in the simulation test of stack performance and the research work of DC permanent magnet motor.
The expert group believes that the project has completed the research content stipulated in the contract, basically reached the technical indicators stipulated in the contract, and made important progress in the key technologies for air compressor development, unanimously agreed that the project passed the acceptance, and suggested further reduction of air compressor noise. , increase its output and achieve greater results.
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