Design And Simulation Of Multi-cylinder Hydraulic System Of 200T Lick Block Press

As an important medium for supplementing trace elements and nutrients in cattle and sheep,the market demand for high-quality lick blocks is also growing in the context of the rapid development of large-scale breeding of cattle and sheep in China.However,most of the domestic equipment for the suppression of lick blocks are small tonnage presses,and the compaction effect of the processing of large block blocks is generally not satisfactory,and the compaction degree and density distribution uniformity of the compact block need to be improved.Therefore,it is of great significance for the development of domestic lick block equipment to study a small tonnage automatic block press that can improve the compact compaction effect,control the cost and operate reliably.This paper takes 200T press as the research object,studies and designs a new multi-cylinder transmission hydraulic system,realizes a variety of pressing technology,and improves the compaction effect of the press;The mathematical model of the key pressing link of the hydraulic system is studied,and combined with the physical model of the hydraulic transmission system,the simulation analysis of the multi-cylinder hydraulic transmission system is performed based on AMESim software,which provides a certain theoretical basis for the design and optimization simulation of the multi-cylinder hydraulic transmission system of the lick block press.The main research contents are as follows.Firstly,based on the basic research theory of mechanical properties of powder forming and the molding process,the design of the bidirectional floating pressure multi-cylinder transmission scheme of 200T lick block press is completed,and the compaction effect of the bidirectional floating pressure multicylinder action scheme is verified through experiments and Deform simulation and other technical means.After determining the overall design requirements of the hydraulic system of the 200T lick block press,the design of the bidirectional proportional floating multi-cylinder transmission hydraulic system is completed,and the key hydraulic components in the system are calculated and selected.Secondly,the mathematical modeling of the proportional floating pressurization process is carried out,which provides important theoretical support for the modeling and simulation analysis of the important load pressurization and electro-hydraulic pressure control links in the hydraulic system based on AMESim.Based on the proportional floating pressure mathematical model and the physical model of the hydraulic transmission system,the AMESim modeling and simulation of key hydraulic components are completed.The dynamic and static characteristics of the pressure control loop of the electro-hydraulic proportional relief valve are simulated and analyzed,and the sample parameters of the electro-hydraulic proportional relief valve are compared with those of the selected electro-hydraulic proportional relief valve,and the debugging of the electro-hydraulic proportional relief valve is completed.Finally,the hydraulic system is simulated based on AMESim,focusing on the dynamic characteristics of displacement,speed,pressure and flow of each hydraulic cylinder in the full cycle of bidirectional proportional floating pressing and multi-cylinder transmission.The results show that the bidirectional proportional floating multi-cylinder transmission hydraulic system has achieved the expected design purpose.In summary,the design of the multi-cylinder drive action scheme of the 200T lick block press is completed in this paper,and the compacting degree and density distribution uniformity of the compact body under different pressing methods are analyzed and verified through experiments and simulation techniques.The results show that the bidirectional floating multi-cylinder action scheme has better compaction effect.According to the action scheme of multi-cylinder transmission,the design of bidirectional proportional floating multi-cylinder transmission hydraulic system is completed.The key proportional floating pressurization process in the hydraulic system is modeled mathematically,and the hydraulic system is simulated based on AMESim based on the mathematical and physical models.The control characteristics of the electro-hydraulic proportional relief valve are compared with the sample manual,which improves the simulation efficiency and reliability of the hydraulic system.Finally,the rationality of the design of the bidirectional proportional floating multi-cylinder transmission hydraulic system is verified,which provides certain guiding significance for the design and optimization simulation analysis of the multi-cylinder transmission hydraulic system of the lick block press.