Transactions of Materials and Heat Treatment

Title：Research of pressure-relief characteristics of pump-controlled press based on the weakest noise intensity

Authors： AI Chao KONG Xiang-dong LIU Sheng-kai WANG Guang-ping

Unit： Yanshan University

KeyWords： power bond graph pump-controlled press pressure-relief characteristic noise intensity

ClassificationCode：TH137.5

year,vol(issue):pagenumber：2013,38(6):80-85

Abstract：

Point to the problem of pressure-relief shock for the hydraulic system in pump-controlled press, theoretical pressure-relief curve based on the weakest noise intensity was deduced with 0.6 MN pump-controlled press as a support incorporating power bond graph. The model of Proportion Variable Radial Piston Pumps (RKP) was established, while the working cylinder model, the sectional lumped parameter pipe model containing modified dynamic friction term and other unit models were deduced. Aim to obtain the minimum of maximum noise intensity during pressure relief process, the theoretical pressure-relief curve was deduced using Lagrange mean value theory. By simulating the main cylinder and pressure relief pipe pressure curve during pressure relief process under theory, exponential, linear and sinusoidal unloading curves were compared, and then experimentally studies were carried out on 0.6 MN pump controlled press. The results show that the simulation curve based on bond graph theory model matches actual curve well, in addition, the theoretical pressure-relief curve is of better pressure-relief effect, which is a new effective way for decreasing pressure-relief shock.

Funds：

高等学校博士学科点专项科研基金(20101333110001) ;国家自然科学基金资助项目（51375422）;秦皇岛市科学技术研究与发展计划项目（201302A020）

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