| With the acceleration of the application process of green renewable energy and the objective requirement of sustainable development,the replacement of traditional mineral oil medium by water medium has become an important direction for the development of hydraulic technology.Due to its own advantages,such as its wide source,no pollution,high security and so on,making this technology rise again.Water hydraulic technology has put forward new requirements for the material and structure of the hydraulic valve because of the different physical and chemical characteristics of oil and water.In this paper,a test platform is built to study the phenomenon of cavitation and other phenomena of the existing water hydraulic valves.A collaborative design platform is built to study the design of the pure water hydraulic valve.Firstly,to improve the design efficiency of water hydraulic technology,a key component of water hydraulic technology,a cooperative design system is established for pure water hydraulic valves.Based on that,a collaborative system structure and system database under B/S structure mode are established.PHP and MySQL technologies are applied to develop an Internet based collaborative design system,to realize task management,parametric design,bionic model base and knowledge base.Meanwhile,the water hydraulic valve experimental data module and the experimental database are established,through many experimental data,provide data support and case support for the design of water hydraulic valve.Secondly,to do experimental research on the characteristics of water hydraulic valve,a data collection system is designed and built with comprehensive functions for the comprehensive experimental system of water hydraulic valve.The experimental data acquisition system uses PLC programmable controller to connect industrial control computer and hydraulic system.The Kingview acquisition software is used to design user interface of test valve and transparent valve experimental data acquisition.In the visual experimental image acquisition module,a high-speed camera suitable for shooting the phenomenon of water hydraulic cavitation is selected,and the transparent water hydraulic valve is photographed by computer software,so that the complete cavitation phenomenon can be achieved.Thirdly,the experiments are carried out on the water hydraulic experimental table and the experimental data are recorded and collected according to the data acquisition system designed in this paper.The transparent throttle valve is analyzed,openness-flow characteristics tests and differential pressure-flow characteristics tests are given according to the inherent characteristics of the transparent valve.The accuracy of the data acquisition system designed in this paper is verified by comparison of data from system and from digital display meters.Then the experiments are carried out on the other three water hydraulic valves,and the acquisition and storage of experimental data are realized by using the operation interface designed by Kingview software.Cavitation erosion of transparent valves are analyzed by using the high-speed camera,and the multi angle imaging method is used in cavitation test of the transparent valve.Finally,MATLAB image processing method is used to conduct image processing and result analysis for transparent valve experimental images,then experimental data can be uploaded and collated,and the distributed collaboration of the system is examined.In addition,a case model of cavitation erosion in the design of water hydraulic valve based on CBR(Case Based Reasoning)is established as a reference for design.At last,the use process of the whole collaborative design system of water hydraulic valves and the significance of the system are expounded through a design example of a water hydraulic valve. |
