Research On Optimal Design Of Hydraulic Integrated Block Runner Based On 3D Printing Technology

The hydraulic integrated block is an important part of the hydraulic system,which is highly integrated and easy to maintain.Due to the limitation of the traditional processing technology,many unnecessary process holes will appear inside the integrated block,and the flow channel is mostly a right-angle turn.These structures will cause energy loss and severely restrict the improvement of the efficiency of the hydraulic system.This article takes the internal flow channel of the hydraulic manifold as the research object,uses computer simulation technology to perform numerical simulation analysis,find out the cause of energy loss,and optimize the design of the flow channel.In addition,the lightweight design of the honeycomb structure of the integrated block itself is finally printed and manufactured using light curing molding technology.The main contents are as follows:(1)The basic equations of fluid mechanics and the turbulence model commonly used in computational fluid dynamics are introduced,and the two pressure losses inside the flow channel are analyzed.(2)Fluent software was used to simulate and analyze the typical flow path inside the integrated block,and the pressure cloud diagram and velocity cloud diagram were obtained to analyze the causes of the pressure loss of the flow channel,the dimensional characteristics of the flow channel were changed to further study the characteristics of the flow channel.For example: study the influence of the extension length of the blade angle cavity and the position of the blade angle cavity on the pressure loss of the right-angle flow channel;study the effect of the distance between the two channels of the Z-shaped flow channel on the pressure loss;and study the diameter of the process hole volume cavity.(3)The right-angle turns in the flow channel are replaced with arc transitions,and simulation analysis is performed.Then,based on the excessive arc,a size optimization design method based on the proxy model is proposed.The pressure loss is used as the optimization target,the flow channel diameter and the radius of each arc are design variables,and the integrated block flow channel is optimally designed.Comparative analysis of the pressure loss of the model before and after optimization shows that the pressure loss is reduced by 52.12%.(4)Through fluid-structure coupling analysis,the integrated block has small stress and uniform distribution,which can be designed for lightweight.The bionic honeycomb structure is used to lightly design the integrated block,and the appropriate honeycomb size is selected by the size optimization method.The weight analysis of the model before and after optimization shows that the weight is reduced by 23.01%.(5)Finally,3D printing technology is used to print and manufacture the optimized model to verify the machinability of the optimized model.The results show that the model is of high quality.