Load-sensing pump that can automatically adjust the output flow and output pressure according to the system load have good energy-saving effects.However,load-sensing pump are prone to oscillation and sometimes even instability in the process of use.In order to better study and apply the load-sensing pump,a theoretical analysis of the operating state of the load-sensing pump was conducted,and the corresponding mathematical model was established to find out the open-loop transfer function in the control process,and the AMESim software simulation model of the load-sensing pump was built.The effect of parameters such as bypass damping hole diameter,load-sensing valve spring stiffness,spool diameter and bypass damping hole diameter on the dynamic response of the load-sensitive pump is derived from the dynamic response analysis,and appropriate changes of these parameters can make the system respond faster and reach the smooth state more quickly.
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