锻压技术

液压机节流自控负载敏感液压系统及其Simulink仿真

英文标题：Throttling automatic control load sensing hydraulic system of hydraulic press and its Simulink simulation

作者：李坤宏1 江桂云2 朱代兵3

单位：1.重庆工业职业技术学院机械工程与自动化学院 2.重庆大学机械工程学院 3.重庆红江机械有限责任公司

分类号：

出版年,卷(期):页码：2022,47(3):169-173

摘要：

为克服液压机阀控系统运行能效低的问题，采用进出口技术和负载敏感技术相结合的方法来调节阀控系统，并对进出油口联动节流进行了适当调整。通过AMESim构建得到仿真模型，探讨了节流自控负载敏感系统运行控制过程。研究结果表明：与负载敏感系统相比，采用进出口自控系统能够实现节流口解调，阻抗条件下该系统能够对出油腔低压力状态进行自动调节，有效降低出油口的压力损耗。进入0.2~0.4 s的超越缩回工况后，右腔压力和泵输出压力均为1 MPa的稳定值；在0.4~0.6 s之间时，系统从超越缩回工况过渡至阻抗工况。为负载敏感系统设置节流自控后可以显著增大电机的输出功率，使液压系统达到更高的工作效率。

In order to overcome the problem of low energy efficiency for valve control system of hydraulic press, the valve control system was regulated by the method of inlet-outlet technology combiming with load sensing technology, and the linkage throttling for the inlet-outlet of oil was adjusted appropriately. Then, the simulation model was built by AMESim, and the operation control process of throttling automatic control load sensing system was discussed. The results show that compared with load sensing system, the inlet-outlet automatic control system can realize the throttle demodulation, and the system can automatically adjust the low pressure state for the outlet chamber of oil under the impedance condition, effectively reducing the pressure loss for the outlet of oil. After entering the over-retracting condition of 0.2~0.4 s, the pressure of right chamber and the output pressure of pump are both stable values of 1 MPa. Between 0.4~0.6 s, the system transitions from over-retracting condition to impedance condition. After setting the throttling automatic control for the load sensing system, the output power of motor can be significantly improved, so that the hydraulic system can achieve higher work efficiency.

基金项目：

重庆市科技计划（应用开发重大）项目（cstc2015yykfC40001）

李坤宏（1975-），男，硕士，副教授 E-mail：likunhong777@163.com

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