Test and Simulation Analysis of Multi-Circuit Valve for Excavator
Firstly,a test plan for excavator multi-circuit valve test bench was designed.The main units of the multi-circuit valve test bench include power source unit,simulated load unit,control system unit,etc.This test bench can test the flow characteristics,pressure loss characteristics,secondary pressure rise characteristics of the main safety valve,opening and closing characteristics of the holding valve,flow distribution characteristics of the logic valve,regeneration characteristics,etc.Then,the flow characteristics of the left linear walking slide valve of the multi-circuit valve were tested under no-load conditions.Finally,a comparative analysis was conducted on the experimental and simulation data of the left linear walking slide valve of the multi-circuit valve,and the following conclusions were drawn:(1)In the bench test,the selection and placement of sensors have an impact on the test results,(2)A comprehensive comparison was made between the experimental data and simulation data of the left linear walking slide valve,and the model accuracy was over 90%.A high-precision simulation model can further optimize and analyze the performance of the left linear walking slide valve.
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