Performance Analysis And Simulation Of Dual-pump Drive System For Single Drum Roller

The single drum roller is one of the main models for compaction of soil and stable materials,which is widely used in the field of subgrade,foundation,embankment and other infrastructure construction.When compaction is carried out on loose and thick layer soil foundation or embankment,the single drum roller must have enough traction force and large climbing capacity to ensure the quality of compaction operation.With the emergence of larger tonnage roller,the traditional driving system of single pump and double motor has gradually failed to meet the power demand of single drum roller,especially when the slope is vibrated and compacted,the steel wheel has serious slip and low driving capacity,which seriously affects the compaction quality.Therefore,according to the driving ability and load characteristics of single drum roller,it is very important to design a dual pump independent driving system and study the dynamic characteristics of dual pump independent walking driving system for improving the driving ability,climbing performance and compaction operation ability of single drum roller.In this paper,the running system of a single drum vibratory roller is tested,and the test results are analyzed.This paper analyzes the change of speed of roller in different working gear,and studies the load characteristics of the walking system in three stages: acceleration starting,smooth operation,parking and deceleration.Combined with the performance test of the hydraulic system of the vibratory roller,the main factors affecting the pressure of the walking system are analyzed theoretically.In view of the phenomenon of skidding and insufficient driving force of the roller under the bad working conditions,a new independent driving system of double pump and double motor is proposed.The mass distribution of the front and rear wheels is determined,and the driving resistance under the stable working conditions and climbing conditions is calculated,the maximum driving force of the whole machine is obtained,and the design and calculation of the main power components of the double pump and double motor hydraulic driving system are completed and selection.The simulation model of walking system is established,and the system pressure changes under different slopes are simulated and analyzed,which verifies the correctness and feasibility of the system model.This paper analyzes the main factors that affect the power of the walking system of the roller,puts forward the method of reducing the inertia load of the walking system,and simulates and analyzes the influence of different damping hole diameter on the pressure and acceleration of the hydraulic system.The simulation results show that the peak pressure of the system can be reduced by adjusting the size of the damping hole.