Flow Control Performance Investigation of a Load Control Valve Using Modelling Method Directly Based on Irregular Shaped Groove Parameters

This paper presents the modelling method of flow control performance directly based on irregular shaped groove parameters in a load control valve. Flow control is the key performance of load control valve because it directly determines the operability of the system. For better proportional flow control ability, the orifices in load control valves are usually designed as irregular shaped grooves, which increase the modelling difficulty of the valve. Geometrical computation of the irregular shaped orifices was firstly conducted. Force balance and circuit calculation of the components and orifices were secondly considered. The model that directly based on the groove parameters of the pilot orifice and the feedback orifice were obtained. Finally, the modelling method was validated by experiment results. The modelling method of load control valve flow control performance can provide guidance for the modelling of other hydraulic valves.