Research On The Bio-inspired Anti-wear Characteristics Of Water Hydraulic Valves And Data Collaborative Management

With the acceleration of green energy and the objective requirement of sustainable development, it has become an important direction of hydraulic technology to replace the fossil oil medium with aqueous medium. The re-emergence of water hydraulic technology also attributes to its own advantages, such as a variety of sources, environmental protection and safety, etc. At the same time, as an indispensable part of the hydraulic system, the hydraulic valve is faced with new requirements on the structure and materials, due to the difference of the physical and chemical characteristics between the fossil oil and the water.Consequently, my research concentrates on the loss of solutions for the cavitation and erosion problems occurring in the water hydraulic valve, the less data for optimization, and the high subjectivity for the parameter selection in the simulation process.Firstly, the mechanism of the cavitation damage in the aqueous medium is introduced.The full cavitation model is adopted to deploy the flow field analysis on the typical orifice structure of the water hydraulic valve. And the principle of reducing and preventing the cavitation damage is discussed. Based on these, an anti-cavitation orifice structure of the hydraulic valve is designed and simulations are implemented on it, which can be used as a reference for the design of the orifice structure of the water hydraulic valve.Secondly, according to the water quality of high sand content in our country, BioTRIZ theory is adopted to deploy the mapping from the biological model to the engineering model,then, the tamarisk-inspired anti-erosion shape is utilized to improve the erosion resistance of the valve core. Through analyzing the anti-erosion characteristics of tamarisk, six kinds of bionic anti-erosion structures and their different arrangements are proposed, then they are applied to the areas where the valve core suffers from serious erosion. Subsequently,combining with the cone-sphere anti-cavitation structure, the gas volume rate and erosion rate of each bionic model are calculated using the FLUENT Hybrid model, and the optimal bionic structure is selected which is with the best compound anti-cavitation and anti-erosion performance. What’s more, DOE(Design of Experiments) is applied to determine the contribution of each variable to the objective function, then to judge the necessity of each variable. ISIGHT is utilized to optimize the structural parameters of the valve core, to make its anti-cavitation and anti-erosion performance reach the best. In this way, the life of the water hydraulic valve in the water with high sand content is increased satisfyingly.Finally, the research concentrates on the less data for optimization, the poor accuracy of results and the high subjectivity for the parameter selection in the simulation process in the traditional design. The collaborative design process of the Internet-enabled manufacturing under the "Made in China 2025" strategy is discussed. And, in view of the water hydraulic valve, the data collaboration management and the main function process are deployed. On this basis, collaborative system structure and system databases are established in B/S structure mode, which adopts PHP, MySQL, MVC and other technologies. Eventually, a prototype system --- "Data Collaboration Management System" is developed based on Internet, which can achieve various functions, such as authority management, task management, data management, etc.