Design And Research Of 2D Buffer Valve Based On Rigid Pressure-torsion Coupling

Transmission device is the intermediate equipment that transmits the power to the working mechanism.As the main component of the vehicle,it is one of the important factors to determine the performance of the vehicle.In recent years,with the attention to the feeling of the driver and occupant on the heavy vehicle,the research on the drive stability is more and more in-depth.The working performance of the vehicle shift system directly affects the service life of heavy vehicles,as well as the comfort of drivers and occupants.There are many solutions to this problem.At present,the most commonly used method is to connect the buffer valve in series in the oil path of entering the clutch cylinder,so that the oil pressure in entering the clutch cylinder rises slowly in a certain period of time.In the early stage,most of the heavy vehicles on the use of traditional mechanical hydraulic buffer valve,but the traditional mechanical buffer valve has its own structure and performance and many other shortcomings,so the electromagnetic buffer valve arises at the right moment,its application has greatly improved the quality of heavy vehicles shift,but with the development of hydraulic technology,The combination of 2D digital technology and buffer valve has a qualitative leap,but there are weak anti-pollution ability and large lateral sliding friction gear,resulting in energy waste,so it is necessary to design a fast response,strong adaptability,high precision,more compact structure of the buffer valve.Aiming at the above problems,this paper proposes a digital buffer valve combining 2D technology and pressure-torsion transmission idea to improve the shift stability of heavy vehicles in use.The main content is introduced as follows:(1)Based on the performance requirements of the shift buffer valve,the structure design of the 2D buffer valve based on the rigid pressure-torsion coupling is carried out,which mainly includes the design,drawing and processing of each component.Based on the working principle of the rigid pressure-torsion coupling,the working principle of the two-position buffer valve is explained.(2)The research process refers to the idea of co-simulation,using AMESim to achieve the structure simulation of the main valve part,and using Simulink to achieve the characteristic output of the pilot valve on the basis of mathematical modeling.Get the input/output relationship between the whole system.(3)The step response,buffer characteristic and impulse response at different frequencies of the output pressure curve of the two-dimensional buffer valve based on the pressure-torsion coupling were analyzed.The response time,peak time,overshoot and steady-state error of the system were calculated based on the analysis of experimental data,and the feasibility of the two-dimension buffer valve structure was verified.(4)Build a buffer system experiment platform,use Simulink module to design the acquisition control program,control the opening and closing of the control oil directional valve on each pipeline,and collect the pressure value of the pressure sensor of the output pressure port of the buffer valve.Based on the analysis of the experimental data,the performance of the2 D buffer valve is verified.