大型秸秆打捆机液压系统的节能优化研究

Study on energy saving optimization of hydraulic system of large straw baler

为有效提升大型秸秆打捆机液压系统的节能性,设计一种能量回收系统,分析打捆机液压系统的工作模式,根据打捆成型液压控制方案对节流和溢流阶段的能量损失进行计算;采用三腔液压缸与蓄能器直连的方式对能量回收回路进行设计,有效提升系统的能量利用率并降低液压回路的复杂性;基于AMEsim软件构建系统仿真模型,研究单个打捆成型周期内的液压缸动力响应特性和液压泵能耗变化规律。结果表明,在能量回收系统作用下,液压泵的能耗可降低60%以上,三腔液压缸行程能够保持较高的控制精度和稳定性;在蓄能器压力释放阶段,液压泵的平均功率可减小75%以上,整个液压系统的节能效果和性价比均有显著提升。研究为提升大型秸秆打捆机液压系统的工作寿命和稳定性提供借鉴。

In order to significantly improve the energy saving of the hydraulic system of large straw baler,an energy recovery system was designed.The working mode of baler hydraulic system was analyzed,and the energy loss in throttling and overflow stage was calculated according to the hydraulic control scheme of baling forming.The three-chamber hydraulic cylinder was directly connected with the accumulator to design the energy recovery circuit,therefore,the energy utilization of the system was effectively improved and the complexity of the hydraulic circuit was reduced.The system simulation model was built based on AMESim software to study the dynamic response characteristics of hydraulic cylinder and the change law of hydraulic pump energy consumption in a single baling forming cycle.The results show that under the action of the energy recovery system,the energy consumption of the hydraulic pump can be reduced by more than 60%,and the stroke of the three-chamber hydraulic cylinder can maintain high control accuracy and stability.In the pressure release stage of the accumulator,the average power of the hydraulic pump can be reduced by more than 75%.The energy saving effect and cost performance of the entire hydraulic system were significantly improved.The research provides a reference for improving the working life and stability of the hydraulic system of large straw baler.