| With the continuous development of science and technology, engineering machineryindustry has been developing rapidly in recent years. Cranes as an important tool forconstruction machinery is playing an increasing role in the construction machineryindustry. Synchronous regulation technology is a key technology for the truck crane,what’s more, this technology is widely used in the large tonnage truck cranes. The urn(multi-cylinder) synchronous precision is a major factor that restricts our car cranes’development. According to different hydraulic system on the accuracy of the differentrequirements synchronicity, hydraulic sync technology mainly includes five hydraulicsync system, they’re throttle speed regulation system shunt valve current collector,synchronous system, motor synchronization systems, proportion synchronizationsystems, and servo synchronization system.The car urn synchronous technology system used by the large tonnage crane mainlyincludes the balance weight urn synchronous hydraulic system, appling luffinghydraulic system, super up luffing hydraulic system, and super up on hydraulicsystem. This paper uses the balance weight urn synchronous hydraulic system as anexample, and the hydraulic system mainly uses the shunt valve adjust currentcollector synchronous technology. Meanwhile, this paper analyzes urn synchronousbalance weight typical hydraulic components, and the results show that shunt valvecurrent collector accuracy has a great influence on the synchronicity of the system.According to the working principle of rainfall flow valves, this paper focuses on theshunt collecting the main performance, the flow, the valve core force, variable, thearea of the mouth throttling, diversion accuracy is analyzed in details, and shunt valvetesting according to collecting data. At the same time, the paper attempts to establishthe mathematical model of the valve shunt current collector by using the AMESimsoftware to analyze the performance of the simulation in order to find out the work ofcollecting the shunt the mechanism and influencing factors of the shunt precision key, and validated by experiment. In order to study the balance weight hydraulic systeminfluence of ynchronicity factors, analyzed the system balancing valve staticperformance and dynamic performance, and established the mathematical model ofthe balance valve. The balancing valve’s anti-wizard mainle simulated and analyzedthrough from the load stress and control. according to the simulation results, we set upthe balancing valves’ anti-breakover pressure, and verified the simulation resultsthrough analysis the experiment data. This paper established the balance weighthydraulic system AMESim mode according to the actual situation, by analyzed thesimulation results and experimental test data, identified the key factors affect thebalance weight hydraulic system-cylinder out of sync, to solve the balance weighthydraulic system of system failure. Proposed the improvement measures and wastested according to analysis experimental test data for find out the factors that affectthe system jitter. Finally, according to the system analysis, gave up improvementmeasures of the balance weight-cylinder synchronization, designed a new hydraulicsystem and real vehicle test, and improved the program effectiveness. |
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