Effects of adjustable and control parameters on performance characteristics of multi-controlled variable displacement pump

Energy efficiency and improving the performance of high-power hydraulic systems in machinery are essential trends. Various methods can be employed, and the widespread use of multi-controlled hydraulic pumps is one of the most popular approaches. In this work, the effects of adjustable and control parameters on the pump's performance characteristics are investigated. Regarding this, based on the operation principle of hydraulic pumps with a multi-function controller, a dynamic model within the mathematical equations and the corresponding simulation model are developed. An experiment study is also conducted to confirm the accuracy of the theoretical model. From the theoretical and experimental results with a given pump configuration, it is seen that the pump flow is regulated according to the changing the control signal within a range of 0 to 500 mA and varying load between 40 and 350 bar, and the pump power is adjusted according to the initial setting force of the pressure compensator from 50 to 150 bar which is guaranteed to correspond to the working load. The initial setting force adjustment of the load sensing valve should not exceed 400 N due to flow fluctuations and pump overload. The research results provide a foundation for properly installing and adjusting the pump to enhance its operational efficiency in hydraulic systems.