Study on the Characteristics of Multiway Valve with Compensator with Variable Pressure Difference

The existing pre-valve pressure compensation flow control valve has the problems of low flow control accuracy, poor operating performance. In this regard, a load-sensitive flow valve with controllable pressure compensation ability is proposed, which improves the rapidity of large flow conditions and the energy saving and control accuracy of small flow conditions by ensuring that the pressure difference of the main valve is consistent with the change of pilot pressure. The working principle of variable pressure differential pressure compensation multi-way valve is clarified, and the simulation model of the multi-way valve is established on the AMESIM simulation platform for simulation analysis. The results show that when the compound movement requires a large flow, a wide range of no-flow saturation function can be achieved by increasing the pilot pressure, and the flow change curve is smooth in the whole process, and the whole machine runs without jitter, which has good controllability. When a small flow rate is required at low speeds, the pressure loss of the system is reduced by reducing the pressure drop, and the energy saving of the system is improved.