摘要
该文旨在研究径向型六缸内燃泵楔面凸轮机构对起动性能的影响,介绍了内燃泵的工作原理,建立了楔面凸轮机构的效率特性模型和弹簧对曲轴的阻力矩模型。通过仿真分析,楔面凸轮机构的机械效率在97%以上,与楔角呈单调递增的抛物线形。柱塞回程弹簧对曲轴的阻力矩之和为幅值4.43N·m、周期120°(CA)的余弦波形,使曲轴起动阻力矩增大4.43N·m,但对起动功率没有影响。提出了考虑楔面凸轮机构效率特性的内燃泵起动电机的匹配方法。该研究以期为内燃泵的性能分析和起动系统设计提供重要依据。
Aiming at influence of wedge-cam mechanism on the starting character of radial six-cylinder internal combustion pump,the working principle was described,and the models of mechanical efficiency of wedge-cam mechanism and the resistance torque to crankshaft by springs were constructed.Simulation results showed that the efficiency was more than 97%,which was a incremetal parabolic curve versus the wedge angle.The resistance torque sum of all springs was a cosine wave with an amplitude of 4.43 N·m and cycle of 120°（CA）,which resulted in a starting resistance torque of 4.43 N·m to the crankshaft,but had no influence on the starting power.The matching method of starting motor considering the efficiency of wedge-cam mechanism was put forward.The study will provide important base for performance analysis of internal combustion pump and design of starting system.
出处
《农业工程学报》
EI
CAS
CSCD
北大核心
2010年第6期152-156,共5页
Transactions of the Chinese Society of Agricultural Engineering
基金
国家自然科学基金项目(50975146)
国家高技术研究发展计划("863"计划)项目(2008AA04Z117)
关键词
凸轮
起动
模型
内燃泵
机械效率
cams
starting
models
internal combustion pump
mechanical efficiency
