Research On Force Balanced Multi- Output Radial Plunger Pump

In a complete hydraulic system,the hydraulic pump plays a very important role.It can convert mechanical energy into hydraulic energy which is required urgently in a hydraulic system,so it always be named the heart of hydraulic system.Traditional radial piston pumps tend to subject their drive shafts to unbalanced radial forces due to eccentricity and can only give one type of flow output.The new radial piston pump proposed in this project overcomes the imbalance of force on the basis of the advantages of traditional radial piston pump retained,and it can adjust the working mode to give two or more kinds of flow output.First of all,the structure of the new radial piston pump is confirmed.We changed the force transfer form and plunger restraint form in the traditional radial piston pump,and proposed a new plunger model with middle force behavior.On this basis,its unique structural features is introduced and its working principle is analyzed.The basic parameters such as displacement are calculated.And then in the application level,a new type of hydraulic synchronous loop is designed,which validated its practicality.Secondly,considering the condition that the shaft is balanced by the radial force,the curve of the important equal-width rectangular groove is designed.Only on the aspects of soft and hard impact,the elliptic curve is preferred.But it need to be optimized and adjusted when considering the structure and working conditions.On this basis,the radial acceleration,radial velocity and flow pulsation were calculated by MATLAB software.Thirdly,the analysis of its structural characteristics,mainly including leakage,stress,and flow field analysis.In the analysis of leaks,it focuses on the site where leakage will occur,then analyzes and deduces the leakage value according to the conclusions of hydrodynamics for different leaks.In the analysis of stress characteristics,focusing on the most complex force behavior of the plunger to start.And three working conditions were calculated respectively,which is to get the position and size of the most serious plunger force.By the means of ANSYS Workbench software the dangerous section can be identified,and its conclusion can be used to optimize it.Then,the FLUENT module is used to simulate the flow field inside the pump.From the perspective of the flow field,we can find a good proposal to optimize the flow field.Finally,a force balanced multi-output radial piston pump experimental platform was set up and a theoretical experiment was carried out to verify the feasibility of its work,which is to provide experimental basis for further design optimization in the future.