Transactions of Materials and Heat Treatment

Title：Throttling automatic control load sensing hydraulic system of hydraulic press and its Simulink simulation

Authors： Li Kunhong1 Jiang Guiyun2 Zhu Daibing3

Unit： 1. College of Mechanical Engineering and Automation Chongqing Industry Polytechnic College 2. School of Mechanical Engineering Chongqing University 3.Chongqing Hongjiang Machinery Co. Ltd.

KeyWords： load sensing system inlet-outlet automatic control hydraulic system throttling pressure loss

ClassificationCode：

year,vol(issue):pagenumber：2022,47(3):169-173

Abstract：

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.

Funds：

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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