Stability Analysis of Swashplate with Small Swing Angle in Axial Piston Variable Displacement Pump
Swashplate axial piston variable displacement pump is used as the power source of the system.Because the throttling loss is low,compared with the valve controlled hydraulic system,it has a good energy-saving effect.Therefore,the research on it has attracted more and more attention.Its working stability under the condition of small swing angle of swashplate is one of the key problems affecting its application.According to the variable principle of axial piston variable displacement pump,the stability of variable displacement pump is transformed into the stability analysis of variable displacement cylinder.Firstly,the force condition of the swashplate is analyzed,and the balance torque equation of the swashplate is obtained,so as to obtain the load of the variable cylinder.Then,the transfer function of the variable cylinder is derived through the flow equation and dynamic equation of the variable cylinder,finally using the method of sensitivity analysis,so that the key factors affecting the stability of the variable pump can be analyzed,which provides a theoretical basis for the subsequent optimization of the axial piston variable pump.
small swing angle of swashplatestabilitymoment equationtransfer function
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