考虑流固耦合作用下电液伺服阀滑阀形变特性分析OA

As the core component of a hydraulic control system,the spool valve stage of an electro-hydraulic servo valve deforms under multi-physics coupling,which changes the clearance between components and further affects the valve performance.To explore the structural deformation characteristics of the spool valve stage under fluid-structure interaction at different opening degrees,a 3D simulation model is established,and the one-way fluid-structure interaction numerical simulation is adopted to systematically study the deformation laws of the valve spool,valve body and valve sleeve within different opening degree ranges,while the dynamic change of the matching clearance is quantified by a radar chart.The simulation results show that when the valve port pressure difference is 7 MPa,the maximum deformation of the valve body reaches 11 μm and is concentrated at the oil return port,and the maximum deformation of the valve spool is 1.86 μm and that of the valve sleeve is 2.32 μm,both concentrated at the oil inlet port;with the increase of opening degree,the valve spool and valve sleeve show an inward compression trend,while the valve body shows an outward expansion trend.This study reveals the structural deformation characteristics and dynamic clearance changes of the spool valve stage under different opening degree conditions and provides an important basis for the structural optimization design of electro-hydraulic servo valves.