Transactions of Materials and Heat Treatment

Title：Simulation study on influence of orifice diameter on opening and closing performance of unloading relief valve

Authors： Shi Qing Huang Zhouxuan Zhao Chunling Wu Wenbin

Unit： Lanzhou LS Group Co. Ltd. Gansu Key Laboratory of Metal Plasticity Forming & Equipment Intelligent Control

KeyWords： unloading relief valve orifice AMESim switching pressure difference opening and closing performance

ClassificationCode：TH137

year,vol(issue):pagenumber：2018,43(8):140-143

Abstract：

In order to fully understand the opening and closing performance of unloading relief valve，the AMESim model of unloading relief valve was established by the HCD hydraulic components library in AMESim simulation software, and the response curves of flow and pressure changing with load were obtained. Then, the change curves of loading and unloading pressures，switching pressure difference of unloading relief valve versus orifice diameter were obtained by adjusting the orifice diameter Ra and Rb. The simulation result shows that the change of Ra and Rb affects the opening and closing performance of unloading relief valve directly. With the increasing of Ra from Φ1.2 mm to Φ1.4 mm, the loading pressure increases from 23.61 MPa to 24.54 MPa, the unloading pressure increases from 27.20 MPa to 30.00 MPa, and the switching pressure difference increases from 15.20% to 22.25%. With the increasing of Rb from Φ1.1 mm to Φ1.3 mm, the loading pressure decreases from 25.33 MPa to 24.02 MPa, the unloading pressure decreases from 32.94 MPa to 28.39 MPa, and the switching pressure difference decreases from 30.04% to 18.19%.

Funds：

史青（1989-），女，硕士，助理工程师 E-mail：shi_qing1989@163.com

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