摘要
根据混合动力传动系统原理和拖拉机工作特性和传动特性要求,设计了一种并联式混合动力拖拉机传动系统。在对混合动力拖拉机牵引特性理论分析的基础上,提出了混合动力拖拉机动力性和经济性评价指标及其计算公式。并对其动力传动系统各部件主要参数的设计计算进行了探讨,提出了混合动力拖拉机传动系统的设计理论和计算方法。以某混合动力拖拉机为研究对象,通过计算分析了不同挡位下,发动机分别提供60%和40%负荷时的驱动力和爬坡度,以及混合动力拖拉机犁耕作业稳定工作1 h的等效能耗随发动机和电动机转速的变化关系,并对犁耕作业时的理论计算结果进行了仿真验证。结果表明,各挡驱动力和爬坡度与发动机提供的负荷呈正比,而转速匹配范围随发动机负荷的增大而减小。犁耕作业时,理论计算结果与仿真分析结果的最大误差不超过4%,理论计算结果可靠;且在某一挡位下,等效能耗随发动机和电动机转速的增高而增高。对混合动力拖拉机与同功率燃油拖拉机进行了仿真比较分析,发现混合动力拖拉机在犁耕作业下,最高可节能24%。
According to the theory of hybrid electric drive train and requirements of working properties and transmission characteristics of tractors, a drive train for parallel hybrid electric tractor （PHET） was designed. Evaluation indicator and calculation model for dynamic and economic performance of hybrid electric tractor （HET） were suggested based on the theory analysis of traction characteristics of HET. The parameter design methods of each component of drive train were discussed. The theory of design and calculation method for drive train of HET was proposed. Taking a designed HET as study object, the changing relationship of driving force and climbing property with the speed changing of engine and motor under different gearshift when engine was working on 60% and 40% of load, and the changing relationship of equivalent energy consumption for 1 h steady operation on plowing with the speed changing of engine and motor under different gearshift were analyzed by calculating. The calculation result of plowing status was checked by simulation model. Results showed that driving force and climbing property were directly proportional with the load of engine, but speed matching range of engine and motor decreased with the increasing of working load of engine. Moreover, when plowing, the error rate was not over 4% in maximum between calculation result and simulation result, and when increasing the speed of engine and motor, equivalent energy consumption increased under a certain gearshift. Furthermore, the energy conservation of HET was higher by 24% in maximum compared to traditional tractor with the same power.
出处
《农业机械学报》
EI
CAS
CSCD
北大核心
2012年第8期24-31,36,共9页
Transactions of the Chinese Society for Agricultural Machinery
基金
引进国际先进农业科学技术计划(948计划)资助项目(2010-Z18)
江苏省普通高校研究生科研创新计划
关键词
混合动力拖拉机
传动系统
评价指标
设计理论
计算方法
Hybrid electric tractor, Drive train, Evaluating indicator, Design theory, Calculationmethod
