Regulation method of pump and fan system based on speed regulating device of power-split

Based on the characteristic that planetary differential gear train is able to achieve the combination of power and rotational speed, a new method is presented in this paper, which is applicable to the power divided speed regulating device and flow regulation in large pump or fan system. In this transmission device, the dominant power transfers efficiently in mechanical transmission patterns; and through hydraulic speed regulating deceive, another power makes advantage of combination with differential gear system simultaneously to regulate the output speed, which substitutes partial power speed regulation for full power one to meet the flow regulation required by pump or fan. Meanwhile, based on the use of differential transmission speed regulating device developed, this paper proposes a regulating method with the combination of partial power speed regulation and pipeline system throttling, which can reduce the inevitable part of power loss caused by adopting traditional full power hydraulic speed regulating device system, and this provides a new solution to the energy saving of pump and fan.