In view of the defect of existing hydraulic technology of pump controlled differential cylinder, a new type of hydraulic system of double-stator multi-output pump controlled differential cylinder is put forward based on double-stator multi-output pump.On the basis of the multi-output ration pump and multi-output variable displacement pump, two new hydraulic circuits of pump controlled differential cylinder are designed.The cavity area ratio differential is countervailed through the displacement ratio of multi-output pump in two new hydraulic circuits, and it can achieve accurately countervailing by the check value which can greatly improve its energy efficiency.The multi-output ration pump can countervail the asymmetry flow of the multiple differential cylinder through changing the connection of inner and outer pumps, thus it will improve the applicability of the multi-output pump.The experimental platform of the system is built.The results show that the circuit of the multi-output ration pump controlled differential cylinder can solve the problem that the asymmetry flow of differential cylinder due to the area difference, then it can achieve the same speed of differential cylinder in both directions, and it can improve energy efficiency of the system.The experimental result is consistent with the theoretical analysis, which showed the correctness of the theoretical analysis.%针对现有泵控差动缸液压技术的不足,基于双定子多输出泵提出了新型双定子多输出泵控差动缸液压系统.在多输出定量泵和多输出变量泵的基础上,分别设计出两种新型泵控差动缸液压回路.两种新型液压回路是通过多输出泵中内、外泵排量比来补偿差动缸两腔有效面积比,进而通过单向阀实现精确补偿,其很大程度上提高了系统能量效率,其中多输出定量泵可通过切换多输出泵中内、外泵的连接方式,来补偿多种差动缸的不对称流量,提高了多输出泵的适用性.同时对该新型液压回路搭建了试验测试平台,试验结果表明:多输出泵控差动缸液压回路可解决差动缸流量不对称问题,实现差动缸两方向运动速度相同的目的.试验结果和理论分析基本一致,证明了理论分析的正确性.
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