Energy-saving improvement and simulation study on digital hydraulic system

In order to solve the inefficiency problem of the constant pressure digital hydraulic system, this paper built the model of the system and found primary reasons leading to power losses through model simulation. With the pressure compensation technology and the variable frequency hydraulic technology, a new load-sensing digital hydraulic system was designed to instead of the original system and the energy-saving controller of the new system was also designed. Through the simulation comparison study of two systems, it was found that the load-sensing system can effectively reduce the overflow loss and the throttling loss and that the average efficiency of the new system is 30% more than the original system.