| The rape mechanized harvesting was an important link of rape mechanization process, the mechanization level has an important influence on the development of rape industry. Rape segmented harvest machinery has the characteristics of low loss rate and controllable,and strong adaptability to rape varieties and harvest state, long suitable harvest period and so on. Hydraulic transmission technology has used transmission system of swather has great significance for simplify the transmission system, realizing the automation and energy saving. Based on disadvantages with the traditional hydraulic transmission device largely used rubber oil pipe, valve block dispersion has caused complex oil system and tube loss, and the existing hydraulic components of hydraulic drive system for rape windrower as matching unreasonable has resulted in low energy efficiency of the series motor system, which was affect the working performance and stability. This topic take the 4SY-1.8 rape swather in high ground gap as the research object. To analyze the significant factors that affecting the power consumption of series motor circuit in swather, which was achieves the optimization of system power consumption on the basis of the original hydraulic drive system to improve and design. By using simulation software of AMESim and Fluent respectively on the correlation analysis of pressure and flow characteristic parameters and the numerical analysis of the power distribution of the system pipeline, combined with experimental research on hydraulic test bench has obtained the main motor speed, torque and energy efficiency characteristic.This paper from the overall test and power optimization of the hydraulic drive system to local series motor circuit analysis of the load driving stability and simulation of piping system, At the same time, a single motor-load system is simulated and tested. Using the method of reverse design provides basis for motor components selection of the swather hydraulic driving system and improvement of pipeline structure. Its main research contents are:(1)In the analysis based on the working principle and process of the parts of a swather, the hydraulic drive system was improved and designed, that optimized speed regulation mode of the hydraulic driving system; using the series motor system drives the load torque, that ensured the speed ratio stability of the working parts; oil tank and the control valve group was small and the whole assemble and dismantle, hydraulic drive system overall improvement and design was advantageous to achieve the best operation effect for windrower.(2)Under the premise of meet the normal operation of the key components, The ground no-load test was carried out by the combination design of orthogonal and quadratic regression equation. To explore under the different experimental factors condition affects power consumption significantly factors and optimal power combination of series motor system for the swather. Research shows that, when the engine speed to take the minimum value was 1600 r / min, multi-channel valve opening degree to take the minimum value was 30 degrees, shunt valve opening degree to take the minimum value was 126 degrees, The total power consumption of series motor circuit was 2.55 kW, Comparing with the commonly used condition power, reduced power consumption is about to 14.5%. Using the method of reverse design, researched and obtained the motor Operation condition when the optimal power and maximum load, and inverse calculation of the excess reserves of the hydraulic motor, supplies basis for reasonable selection of hydraulic motor and re-optimize or design.(3)Through simulated field load characteristics, AMESim software was applied to study power consumption of import and export oil of the motor, Carried out the numerical analysis of power allocation for the series motor circuit, and conducted the correlation analysis of the pressure and flow characteristic parameters influence for the motor, the influence of load torque on the fuel supply pressure and flow rate of several groups of actuators was obtained when working in series circuit of multiple actuator. At the same time, further used the Fluent simulation was analyzed internal complex flow field characteristics of the pipe joint, bending parts and steel pipe binding site on the basis of the previous research of our research group, that got tube loss of main pressure loss point and power consumption condition of the series motor system pipeline. Quantitative analyze that the pressure loss of the selected pipeline was about 0.066 ×106Pa, after optimization of the pipeline structure, pressure loss decreases by about 0.021 x 106 Pa.(4)Carry out the study of motor-load rotational inertia system on multi-function hydraulic test stand. The results show that set loading conditions of different types was simulated field more complicated load condition, and avoided the rape windrower cannot meet the need of harvesting operations and testing requirements due to rape growth seasonal restrictions, Application Research on the key part of the driving parameters of swather. Using hydraulic test bench to carry out the simulation test of motor energy efficiency of speed- torque characteristics and variable load cycle conditions, provided a basis for strategy and scheme in energy consumption control to further was improved the rape windrower hydraulic. |
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