| Crawler hydraulic excavator is growing proportion of infrastructure as a earthmovingmachinery. The Crawler walking device provided the ground reaction force to the work deviceand in the process of excavator work support, walking,which is directly related to theperformance of the crawler walking excavator’s working efficiency, Therefore, study theperformance of the crawler walking hydraulic excavator system becomes very important..In this article,the development situation of excavator crawler walking system isintroduced and then have analyzed to the structure and principle of the walking hydraulicsystem,load-sensitive system,the universal characteristics of engine and variable displacementpump matching.Firstly, sequence the analysis of the power transmission of crawler excavators andwalking the hydraulic system, simplified to the form of engine-hydraulic pump-hydrauliccircuit-hydraulic motor-reducer institutions-drive wheels,Collect relevant data analysis andtheoretical calculations walking force,derive the virtual crawler system model and crawlersystem dynamics mode,and then use the AMESim hydraulic simulation software to establishthe simulation model to walk the hydraulic system.At the last, set the parameters andsimulation,obtained several different operating conditions (start, braking, climbing, steering)pump, motor and drive wheels of the dynamic characteristics of the simulation datatheanalysis can be obtained at different the conditions speed, torque, flow, pressure variation. |
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