Theoretical Analysis And Experimental Research Of Double-stator Couple Hydraulic Vane Motor

In the new development period,China has put forward new demands for the development of hydraulic components.Hydraulic components should accelerate the direction of high power to volume ratio,high pressure,high reliability,energy saving,long life,high quality,compactness and diversification.Among them,the hydraulic motor is a main actuator in the hydraulic transmission system,providing rotary motion for a variety of mechanical equipment,which is a basic component that has a great influence on the performance of the hydraulic system.High power-to-volume ratio,high reliability,and long-life performance requirements are certainly one of the major development trends in the future.In recent years,with the continuous improvement of motor power density and the continuous advancement of variable speed motors,hydraulic motors must continue to innovate in structural principles,manufacturing and material processing.Due to the limitation of the overall manufacturing level in the country,starting from the basic principle and structure of the hydraulic motor,research and development of new results with independent intellectual property rights can better change the situation that China’s hydraulic components are subject to people.Therefore,this paper takes the double-stator couple type hydraulic motor as the research object,and uses the theoretical analysis and experimental research methods to explore the key technical problems of the double-stator hydraulic motor and lay the foundation for its practical application in the future.Firstly,taking the radial force of the rotor as the starting point,the relationship between the number of blades and the couple of the double stator hydraulic motor under different action numbers is discussed,and the optimal number of blades satisfying the principle of the couple motor is obtained.The mathematical model of the rotor radial force of the double-stator hydraulic motor in four different working modes is established,and the characteristics of the rotor radial force of the motor under four different working modes are analyzed.In order to ensure the stability of the rotor during high-speed operation,the rotor dynamics theory and the finite element method are used to analyze the support mode of the rotor,so that the best support method for the double-stator hydraulic motor is obtained.Secondly,in order to make the coupler type double-stator hydraulic motor finalized,and based on this motor,serialization is extended,and the structure of the coupler type double-stator motor is parametrically designed.Based on the similarity principle of fluid mechanics,a mathematical model including dimensionless parameters is established,which shortens the development cycle of the motor and lays a foundation for the extension research of the coupler dual stator series.Thirdly,the force characteristics of the roller are studied,and the rod groove type line structure with small force of the roller,strong gap compensation ability and more stable work is sought.In order to improve the smoothness of the operation of the double-stator hydraulic motor and eliminate the pressure shock generated during the process of oil distribution in the sealing chamber of the motor,the dead angle of the pressure rising and pressure relief process of the sealed chamber is designed.A mathematical model of the pressure gradient of the oil in the sealed chamber during the pressure rise and pressure relief process is established.The variation law of the pressure gradient in the sealed cavity after the dead angle is established is analyzed.The transient CFD(Computational Fluid Dynamics)simulation model based on dynamic mesh is established,and the instantaneous pressure under various working conditions is obtained,which provides a powerful tool for the optimal design of the dual stator hydraulic motor.Finally,the experimental platform of the double-stator hydraulic motor prototype was built,and the performance of the prototype was tested by no-load and loading test,which verified the correctness of the motor principle and the rationality of the structural design.