Applicability Analysis of Slide Valve in 3D Transient Flow Field Analysis of Sliding Mesh Method

Abstract:

In the three dimensional finite element analysis of slide valve’s reversing, calculation convergence of transient flow field may not be gained because of large mesh deformation caused by fluid structure interaction. For this reason, sliding mesh method oriented to three dimensional transient flow field analysis of slide valve is proposed in this study, using parallel sliding mesh connected between static and dynamic grid to build a three dimensional analytical model, in order to avoid calculation divergence caused by repeating reconstruction of dynamic mesh in the transient flow field. Taking the swing way of multi way valve used in hydraulic excavator as the object of the research and basing on the results of dynamic characteristics test bench for hydraulic components, the comparison between analytical and experimental results verifies the applicability of sliding mesh method in transient flow field analysis of slide valve, providing an engineered expression possibility to build mapping relationship between dynamic load of excavator and its valve’s structural morphology.

Key words:spool valve; three dimensional finite element analysis; sliding mesh method; hydraulic excavator