履带车辆双流传动液压转向功率流设计

Design of Steering Power Flow for Tracked Vehicles with Power Shift Steering System

以零差速式液压转向双流传动为研究对象,进行了液压转向功率流的匹配设计.引入转向功率流运动学设计系数φv、液压转向调速回路工作压力设计系数φp和液压转向功率设计系数φw来表征匹配过程.研究表明：中轻型高速履带车辆的φv取3.6-6.0为宜,在水泥路上的φp取0.65-0.80为宜,基型车在水泥路上的φw取0.45-0.55为宜.通过多个系列液压转向功率流的成功匹配设计与样车试验表明,φv,φp和φw的取值范围保证了车辆液压无级转向性能的实现.

Matching design of zero differential power shift steering transmission is carried out.In order to characterize the matching design of hydrostatic steering power flow,three important parameters were introduced,namely the kinematic design coefficient of steering power flow φv,the working pressure coefficient of hydrostatic steering circuit φp,and the hydrostatic steering power flow coefficient φw.Through theoretical and experimental analysis,the experimental results are reported.For high-speed tracked vehicles of light-or-medium-duty,a better steering performance is obtained when φv ranges from 3.6 to 6.0.For vehicles on cement road,it is recommended that φp should range from 0.65 to 0.80.And for basic type of vehicles on cement road,φw is recommended to be from 0.45 to 0.55.Based on series of successful matching design examples of steering power flow and experiments of prototype vehicles,this paper concludes that： if φv,φp and φw take the value ranges derived from the present study,a good performance of hydrostatic continuously variable steering system can be guaranteed.