轿车混合动力链传动系统设计及高速特性

对混合动力Hy-Vo齿形链系统进行理论啮合设计,结合设计实例完成轿车混合动力Hy-Vo齿形链参数计算以及传动系统布局设计,并在磨损试验台上进行高速磨损试验,绘制Hy-Vo齿形链磨损曲线,并对磨损部位进行微观扫描分析.微观形貌分析结果表明,由于Hy-Vo齿形链通过对滚销轴交替承载磨损,有效降低了承载表面比压值,使得Hy-Vo齿形链具有较高的耐磨性,在高速多冲条件下,轿车混合动力用链的磨损机制为疲劳磨损、磨粒磨损以及微动磨损.提高链条的制造精度并严格保证装配精度对于延长链条的使用寿命具有重大的现实意义.

Design and High-Speed Characteristics of Automotive Hybrid Chain System

The theoretic meshing of hybrid Hy-Vo silent chain system was designed. Based on design projects， the parameters were calculated and the transmission system was arranged. The wear test was performed to gain the wear curve of the novel Hy-Vo silent chain and the microscopic scanning of the wearing terrain. The results indicated that the special-shaped pin of the Hy-Vo chain can bear the load with rolling friction alternatively， and the bearing surface pressure of Hy-Vo chain is lower， resulting in a higher wear resistent property. The wear mechanism synthesizes fatigue wear， abrasive wear and fretting wear. The service life of automotive hybrid Hy-Vo chain system can be improved by enhancing the precision of fabrication and assembly.