Study On Dynamic Characteristics Of Single Drum Vibratory Roller In The Starting Process

Full hydraulic dual-drive single drum vibratory roller is of good operating performance,strong dynamic performance, and able to work in a variety of complex conditions, whichhas been widely used in the compaction of roadbed and subbase. The development ofdomestic dual-drive single drum roller started relatively late, and roller’s performance isimproving, but the defects can not be ignored, such as higher dynamic power consumptionof the engine, the initial start-up difficulties, unstable working parameters, hydraulic systempressure impact and serious speed falling of engine, thus it’s of great practical significanceto improve the performance of domestic single drum vibratory roller.Theoretical analysis reveals the Nature of Things, and clearly reflects the relationshipamong various influencing factors. Experimental research can verify the rationality andaccuracy of the theoretical model. This paper studies on domestic single drum vibratoryroller, and focuses on the research of dynamic characteristics of the roller’s driving system,vibration system and the whole power system in the starting process, which is based on thetheoretical analysis and by means of experimental research.Through analyzing the established mathematical model of roller’s driving system,vibration system and the whole power system in the starting process, it’s discovered that thedynamic characteristics in the start-up process of roller’s driving system are associated withthe accelerated inertial load, and the larger the acceleration is, the more obvious thedynamic performance changes. Vibration system’s dynamic characteristics during thestart-up process are mainly affected by inertial load, and the larger the vibration motor’sangle acceleration is, the more intense the system performance fluctuates. The machine’sdynamic transient power consumption is large, and engine’s speed-falling is serious in thestart-up process. The prototype test showed that pressure impact and engine speed-fallingexisted in the process of starting for roller’s driving system, vibration system and the wholepower system. Pressure impact will seriously affects the reliability and service life of engineand the hydraulic components, so the large inertia load must be avoided when roller’s in thestart-up process. We applied the working parameters of roller’s driving system, vibration system and thewhole power system in the start-up process to the mathematic models established whendoing theoretical analysis work, compared the calculation results with test data to validatethe established models, and analyzed the cause for this difference between two kinds ofresults. For the impact of hydraulic system pressure impact and engine speed-fallingproblems, three kinds of control technologies to restrain the inertial load effectively wereintroduced.The mathematical model established in this paper of roller’s driving system, vibrationsystem and the whole power system in the start-up process, and the relevant researchconclusions provide references for the design and using of rollers, and further research ofroller’s dynamic characteristics.