| High-pressure High-pressure axial piston pump is not only widely used in engineering machinery,metallurgical and mining equipment,petrochemical equipment and other mainframe industries,but also has a large number of applications in water conservancy projects,marine logistics and other fields.High-pressure axial piston pump works in a variety of ways.As one of the three friction pairs,slipper pair is prone to wear and scuffing under high-speed,high-pressure and other adverse conditions,which directly affects the reliability and service life of piston pump.In order to study the friction and wear performance of slipper pairs and improve the bearing capacity of slipper pairs under dry friction caused by accidental failure,it is necessary to develop a slipper pairs friction and wear test platform for high pressure axial piston pump to prolong its working life and bearing capacity.In this paper,the mechanical structure,electric control system,hydraulic loading technology and spindle speed regulation of slipper pair friction and wear test platform are studied.First of all,through the actual needs of slipper pair friction and wear test platform,the overall electro-mechanical and hydraulic analysis of the test platform,and on this basis,draw up mechanical systems,electrical control systems,hydraulic loading system and spindle speed control four aspects of the program,so as to determine the overall results of this study and the basic structure of the experimental platform.(1)According to the test requirements of the slipper pair test platform,the mechanical part of the test platform is studied.Firstly,the structure of the whole machine is analyzed,and then the next step analysis of the spindle system,which is an important part of the experimental platform,is put forward.Secondly,multi-objective function is established for the spindle,neural network and genetic algorithm are introduced to optimize the spindle structure,and the replacement of the original spindle material with carbon fiber material is proposed to enhance the overall efficiency and spindle rotation accuracy.(2)According to the stability requirement of the hydraulic system,the hydraulic loading system of the experimental platform is studied.Firstly,to meet the requirements of slipper pair friction and wear test platform for hydraulic loading system,the overall hydraulic system is designed.Secondly,the hydraulic loading system is designed and simulated according to the actual machining parameters of friction and wear test platform.Finally,the stability and size of the output flow,the specific parameters and performance requirements of each hydraulic circuit in the hydraulic loading system of the test platform are obtained and analyzed.(3)According to the requirement of the experimental platform,the electric control system of the platform is designed and analyzed.Firstly,the control scheme is selected,the hardware model is determined,and the software and control parameters are analyzed.Secondly,the schematic diagram of the electric control system of the slipper pair friction and wear test platform is designed and analyzed.Finally,the mechanical part and hydraulic loading system are studied,and the satisfactory PID control method is introduced to control the electrical control system,and the upper computer is added to design and analyze the picture.(4)In the slipper pair friction and wear test platform,the key to test is to select the spindle.This part mainly studies the speed adjustment of the platform spindle.First of all,analyze and formulate the spindle speed control scheme and analyze.Secondly,the general variable frequency speed regulation and space vector control(SVPWM)are selected to control the speed,and the two kinds of analysis are simulated respectively.Finally,through the simulation of the two structures of this comparative analysis,so as to determine the use of space vector control in this experimental platform for control is more reasonable and stable. |
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