摘要
为提高传统发动机曲轴连杆动力传输机构的机械传动效率,以及减小缸壁和活塞组件间的侧压力,设计新型内啮合齿轮齿条机构作为发动机动力传输机构。对齿轮齿条动力传输机构运动过程进行仿真验证;对齿轮齿条动力传输机构与曲轴连杆动力传输机构的机械传动效率和缸壁侧压力进行对比分析;制造应用齿轮齿条式动力传输机构的发动机样机并调试运行,实验测量同条件下齿轮齿条式和曲轴连杆式发动机样机的输出功率和缸壁磨损量。仿真与分析结果表明:齿轮齿条动力传输机构在三种冲击较大的危险工况下均满足强度要求,其机械传动效率比曲轴连杆动力传输机构的提高12.7%,缸壁侧压力降低68.5%;实验结果表明:发动机样机运行良好,结构简单可行,齿轮齿条式比同条件下曲轴连杆式发动机样机的实测输出功率大,缸壁磨损量小,验证了分析结果。
To improve the transmission efficiency of crankshaft connecting rod power transmitting mechanism and reduce the side pressure between cylinder wall of engine and piston assembly, a new internal gearing gear-rack power transmitting mechanism of engine is designed. Simulation verification of motion of gear-rack power transmitting mechanism is finished, and comparative analysis on transmission efficiency and side pressure of gear-rack and crankshaft connecting rod power transmitting mechanism is done, engine prototype which used gear-rack power transmitting mechanism is manufactured and operated, and the output power and wear loss of cylinder wall of gear-rack and crankshaft connecting rod under the same condition is measured. The analysis results show that gear-rack power transmitting mechanism meets strength requirement under three dangerous conditions which have severe impact, and that transmission efficiency of gear-rack power transmitting mechanism increases by 14.7% , side pressure decreases by 68.5% compared to crankshaft connecting rod power transmitting mechanism. The experiment results show that the engine prototype operates well and has simple structure, the output power is higher and the wear loss of cylinder wall is smaller than crankshaft connecting rod engine prototype, The analysis results are verified by the experiment results.
出处
《机械设计与研究》
CSCD
北大核心
2016年第4期74-78,84,共6页
Machine Design And Research
基金
优秀国家重点实验室基金(20121368572)
