Structure Optimization And Simulation Analysis Of Valve Plate Of Multi-Acting Internal Curve Radial Piston Pump

As the core power component of the hydraulic transmission technology,the multifunction internal curve radial piston pump has the advantages of high load pressure,large displacement,low speed stability and so on,which has been widely used in the fields of ships,mines,construction machinery and so on.The vibration and noise produced by the high-pressure plunger pump seriously limit the working performance and service life of the pump.With the development of science and technology,the hydraulic components are developing rapidly in the direction of safety,reliability,energy saving and environmental protection.It is an inevitable trend to optimize the design of vibration reduction and noise reduction of hydraulic pump in the future.The research object of this paper is the end port six action ten cylinder curve radial piston pump.As one of the most critical friction pairs of the end port radial piston pump,the port pair is most prone to wear and leakage due to its large contact area,and its operation status affects the working performance of the whole radial piston pump.First of all,the theoretical design of the end port plate is carried out,and the stress analysis of the port pair is carried out under the steady and transient conditions respectively.MATLAB is used to analyze the dynamic characteristics of the oil film of the port pair when the radial piston pump encounters sudden load.It is concluded that with the increase of the initial oil film thickness of the port pair in the steady state,the oil film of the port pair of the radial piston pump after the sudden load pressure change is obtained The abrupt amplitude of thickness decreases gradually,and the time of readjustment to equilibrium increases.Secondly,it is also the focus of this paper.The flow field of the six action ten cylinder piston internal curve radial piston pump is simulated by using the radial plunger moving grid module of the CFD simulation software pumplinx.Through the simulation analysis,it can be seen that at the connection of the valve port and the high and low pressure distribution windows of the valve plate,the pressure difference of the clearance oil film of the valve pair is large and the velocity distribution is uneven,which makes the flow pulsation at the pump outlet large The flow pulsation causes the pressure pulsation,which increases the pressure impact inside the radial piston pump,and finally causes serious cavitation,vibration and noise.In order to alleviate the above problems,the research idea of considering triangle damping groove and U-shaped damping groove is put forward.Through the simulation analysis,it can be seen that adding reasonable damping groove in the port window design of port plate can improve the pressure fluctuation characteristics of radial piston pump,the flow fluctuation characteristics and cavitation characteristics of pump outlet,and finally achieve the purpose of vibration reduction and noise reduction.Finally,ANSYS Workbench software is used to carry out the static analysis of the valve plate to determine the equivalent stress and the maximum deformation of the valve plate of different structures,and the strength and rigidity of the valve plate of different structures are calculated by simulation to meet the design requirements.