Highland Gap Sprayer Walking Hydraulic Drive System Design Research

Highland gap sprayer has the characteristic of the chassis gap from the ground, can effectively solve the high stalk crops of corn growth later period does homework problems. At present, most highland gap sprayer adopts mechanical driving, the overall quality is big, the chassis layout is restricted, and adopts hydraulic drive system can simplify the system structure, simple operation, easy to realize stepless purpose. According to the actual working environment of high gap sprayer, in the full understanding high gap sprayer hydraulic technology at home and abroad research status and development trend, on the basis of the highland gap with the hydraulic drive system of the sprayer design research.On the mechanical, electrical, hydraulic and hydraulic drive mode based on comparison and analysis of the four, put forward the drive scheme of the system is driven by hydraulic drive as walking. According to the requirements of the walking hydraulic drive system design, based on the analysis of the characteristics of the open and closed systems principle basis, by comparing the throttle and volumetric speed control mode analysis and comparative analysis, the way of walking and according to the requirements of the hydraulic drive system design, and ultimately determine the variable pump drive double quantitative closed hydraulic system of hydraulic motor as the driving mode of highland gap sprayer.According to the main technical parameters of highland gap sprayer, the system work pressure, engine, hydraulic pump and hydraulic motor performance parameters for the reasonable calculation and selection, finally select Poclain 1DMS11-0 hydraulic motor crane, Rexroth A4V90 plunger pump, CZ480 ZQ engine designs as the highland gap sprayer executive component. Then the hydraulic tubing, pipe, tank and pump hydraulic auxiliary parts such as the selection.According to the requirement of the system in different operating mode, the selection of hydraulic components for the motor speed, system pressure and walking speed, so as to ensure that the design of the hydraulic system can satisfy the full use of the output power of engine, and can improve system reliability and service life requirements, and then using SOLIDWORKS software of hydraulic drive system main components on the 3 d modeling, simulation of the hydraulic system the overall layout of the chassis.Highland gap sprayer was established by AMESim software model of hydraulic drive system and the correctness of the design parameters for the simulation analysis and research. Through AMESim software setting different parameters, and analyzes the performance in a horizontal road, driving performance under different slope and many cases of the change of system parameters, the simulation results illustrate the feasibility of the selected system.The simulation analysis of the hydraulic system pipe internal flow field distribution, by building mathematical model, and by using CFD software FLUENT, the highland gap sprayer hydraulic drive system typical local block in the pipe bend internal flow field simulation analysis, studies the hydraulic oil flows through the pipe bending will follow local bend loss decreases with the increase of the radius of curvature; The pressure loss as flow decreases with increasing diameter, and on the basis of comparing the results of pipeline layout improvement measures are put forward.