Transactions of Materials and Heat Treatment

Title：Simulation analysis and experiment of energy efficiency characteristics for variable revolving speed hybrid power hydraulic press

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ClassificationCode：TH137

year,vol(issue):pagenumber：2021,46(5):216-221

Abstract：

In order to compensate for the loss of throttling and overflow caused by the transmission electric drive hydraulic pump of hydraulic press, a control method of variable revolving speed hybrid hydraulic system was proposed. Then, after the system was equipped with an accumulator, it realized the energy recovery of electro-hydraulic motor, achieved the compensation effect of system leakage and the pre-compression function of hydraulic actuator, and accurately controlled the operating speed and position. Furthermore, the simulation model was built by software Simulation X, and the analysis was carried out from two aspects of dynamic characteristics and energy efficiency characteristics. The results show that after 2.5 s, the two motors both rotate in a positive direction to get the total pressure, and the system pressure reaches 9.1 MPa at 2.7 s. However, the pressure changes stably between 2.7-6.0 s, and the total pressure signal decreases to zero at 6.6 s. Therefore, the system shows excellent operating characteristics and forms a smooth velocity curve, and the steady power change is formed during the driving process of electric motor. When the energy recovery is carried out in a hydraulic-electric way, the system achieves the highest energy recovery rate and shows the best energy-saving effect. The experimental test shows that the system can accurately locate, the speed curve runs smoothly, there is basically no impact, and the entire system has good operating characteristics.

Funds：

山西省高等学校科技创新项目(2019L1000)

关锋（1980-），男，硕士，讲师 E-mail：zetuojinai@126.com

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