| Hydraulic supports test bed is the main equipment to test the performance of the hydraulic support; the isothermal forging hydraulic press is the key equipment of large-scale forging production. Synchronous loading platform is the important part of hydraulic supports test bed; the degree of the isothermal forging hydraulic press leveling agency determines the precision of material processing. This dissertation researched the design, simulation and improvement of performance of 30MN hydraulic support tester synchronous loading platform. The key problem is to realize precise synchronization loading of platform, and control strategy is also used in isothermal forging hydraulic slide mechanism. The main contents are as follows:1) The mechanical structures of two synchronous loading platforms are introduced; the stiffness of hydraulic support synchronous loading test platform and the force of piston cylinder on the typical working conditions are analyzed. Synchronous precision indexes are proposed.2) The strategy of the hydraulic servo control system in the 30MN hydraulic support tester synchronous loading platform using proportional valve closed loop control coupling master-slave control mode was introduced, the control system model is built in AMESim, and the synchronization error of drive cylinder while the control system in un-load or load conditions is tested. In order to measure cylinder force of the platform under motion state and the ability of keeping synchronous accuracy of the hydraulic system, co-simulation analysis in ADAMS and AMESim is carried on. Co-simulation validates that coupling synchronization control strategy is reasonable, effective.3) Control strategies is used in isothermal forging hydraulic leveling system, and the slider leveling accuracy is meeting the requirements, as a result, the control strategy has good versatility and adaptability of partial load and practical value for such large-scale synchronous platform are proved. |
PDF Full Text Request