CAJ | 학술논문

动力换挡变速器换挡时动力不中断，且能够将复杂的换挡过程简化为按钮操作，在国外的拖拉机上已得到了广泛应用。为此，设计了一种新型的负载换挡行星齿轮副变速器，增加了原变速箱的挡位数，并实现了增扭负载换挡与梭行换挡。在分析了整体功能要求的基础上，确定了变速器的传动方案及结构，设计了副变速器液压控制系统，并对拖拉机各挡总传动比及理论车速进行了设计计算。同时，绘制了拖拉机牵引力和比油耗曲线，定义拖拉机牵引功率利用率和比油耗损失率用以评价拖拉机动力性和燃油经济性，并通过计算比较了改进前后拖拉机的动力性和燃油经济性情况。
동력환당변속기환당시동력불중단，차능구장복잡적환당과정간화위안뉴조작，재국외적타랍궤상이득도료엄범응용。위차，설계료일충신형적부재환당행성치륜부변속기，증가료원변속상적당위수，병실현료증뉴부재환당여사행환당。재분석료정체공능요구적기출상，학정료변속기적전동방안급결구，설계료부변속기액압공제계통，병대타랍궤각당총전동비급이론차속진행료설계계산。동시，회제료타랍궤견인력화비유모곡선，정의타랍궤견인공솔이용솔화비유모손실솔용이평개타랍궤동력성화연유경제성，병통과계산비교료개진전후타랍궤적동력성화연유경제성정황。
With the advantage of uninterrupted output power in the process of gear shift, power shift transmission is wide-ly used on Tractor abroad.In this paper, a new type power shift auxiliary gearbox is developed.The new type auxiliary gearbox increases the number of gear positions and has the function of torque booster and shuttle shift.Based on the anal-ysis of function requirements, the general drive scheme and structural style is obtained.The hydraulic control system is designed, and gear ratios and theoretical travel speeds are calculated.The tractor traction and specific fuel consumption curves are drawn.The traction power utilization and specific fuel consumption loss rate is defined to evaluate the tractor dynamic and fuel economy performance .The tractor dynamic and fuel economy performance of original tractor and im-proved tractor is compared through calculation.