Performance Optimization Of Vibratory Hydraulic Drive System For Single Drum Vibratory Roller

With the great support of the state for infrastructure construction,vibratory roller is more and more widely used in engineering operation.Due to the harsh working environment of the vibratory roller,the oil supply is often difficult to meet,and the continuous operation will cause great damage to the machine,which makes it unable to work in the best condition in most cases.The concrete manifestations are as follows: insufficient utilization of engine power leads to increased fuel consumption and emission of harmful gases;frequent starting and stopping causes impact of hydraulic system and energy loss;unreasonable matching of the whole machine leads to reduced reliability of the roller,etc.This paper takes a single drum vibratory roller as the research object,combines the operating conditions and load characteristics,and mainly optimizes the vibration hydraulic drive system of vibratory roller to improve the overall performance and energy-saving efficiency.The main research conclusions are as follows:The whole working cycle of the prototype is tested and the test results are analyzed and processed.Main parameters such as main pump pressure and engine output power curve of the vibratory roller under the whole operating cycle are obtained.By analyzing the characteristics of different stages of operating cycle,a stage-by-stage power matching scheme is proposed and analyzed theoretically.Aiming at the working cycle process of vibratory roller,the method of identifying the main pump pressure in hydraulic drive system is adopted to intelligently identify and accurately divide each working stage.Establish pressure estimation model of hydraulic drive system based on neural network to predict and monitor circuit pressure in real time.The results show that the recognition method has high accuracy and speed,and can effectively identify and classify the whole cycle process.The relative error of pressure estimation results is basically within 10%with high accuracy,which can be further applied to real-time monitoring and prediction of system pressure during engineering operation.Aiming at the dynamic characteristics of vibratory roller during traditional vibration starting process,the disadvantages are analyzed and clarified.A flow control energy-saving vibration starting process is proposed to reduce power loss and energy waste caused by poor flow matching between pump and vibration motor during vibration starting process.Mathematical model and simulation model of energy-saving vibration starting process were established.By comparing flow characteristics,pressure characteristics and power consumption characteristics of traditional vibration starting system,energy-saving vibration starting system has a better optimization effect.The simulation results show that the energy-saving vibration starting model can effectively reduce the energy loss during the vibration-starting process.Compared with traditional vibration system,energy saving is more than 20% and vibration effect is basically not affected.