Development Of Rotary Valve Test Bench And Rotayr Valve Simulation

Water hydraulic technology with its green environmental protection, safety, high efficiency, low cost, inherent cleanliness, flame resistance and other advantages, has a very broad application prospects, in engineering machinery as well as in marine development, new energy as well as other fields, can meet the modern society for environmental protection projects proposed and safety requirements. Because of water hydraulic control valve is a quite important part of water hydraulic transmission technology, large-scale popularization and application of water hydraulic transmission technology must be developed a high performance water hydraulic control valve is the premise. In this paper, in order to design a perfect rotary valve port test-bed as the ultimate goal, according to the specific requirements of the project and project design of the test bench, and improving the water hydraulic control valve theory and design method. The main work and achievements are as follows:According to the performance requirements for export experiment table rotary valve for water hydraulic power source, design principle and method of this paper refers to the hydraulic power system has been,in the full consideration of using pure water as special requirements of the hydraulic medium, assembly of water hydraulic power source finished size design together with mechanism, and with the drive system for the configuration and selection, the hydraulic the power source will provide high pressure water for other subsequent experimental equipment. The specific work is as follows:(1)According to the hydraulic transmission medium (water) the physic-chemical characteristics, we know that.analyzed and summarized the system design need and oil hydraulic water hydraulic under the system should have differences, so as to lay the foundation for the follow-up design and calculation, from the overall obtain understanding of design of rotary valve test bench system.(2)According to the research for the bionic robot electro hydrostatic drive technology of National Natural Science Fund Project (No.:51275495) requirements for hydraulic components, hydraulic test system according to the existing research results at home and abroad and the existing, calculated the dynamics and kinematics, then determine the design size and performance parameters of the core components of the system.(3)Referring to the experimental scheme preliminarily determined, according to the actual demand, the use of proe software to establish three-dimensional model of rotor core assembly valve test system part,in addition participated in the design of assembly drawing and 3D model parameters needed for testing hydraulic power source and pre determine the pumping station.(4) For the core components of the rotary valve test bench(in paper), test rotary valve parts, through the design and project size data calculated on the existing data, a series of rotary valve physical model (3d)that with different valve port opening is established by 3d graphics software proe, including 2.5 degrees,5 degrees,7.5 degrees, 10degrees,12.5degrees,15degrees,17.5degrees,20degrees,22.5degrees etc..(5) Using Ansys workbench mesh and using Fluent analysis of fluid flow, set up a series of entrance pressure, including 1 mpa,2 mpa,4 mpa,6 mpa,8 mpa,10 mpa,12mpa,14mpa and so on, the outlet pressure of 0 mpa. Through the calculation, using post-processing software post to get a series of entrance velocity contours and outlet velocity contours and entrance pressure field nephogram, outlet pressure, velocity vector field nephogram entrance, exit velocity vector diagram, jet angle line chart, flow chart and the flow field of the overall speed overall force diagram etc..Through the completion of the above work, the analysis of the results, draw the entrance jet angle to a maximum of 32 degrees or so, when the opening degree of the valve port is about 10deg For the export of the jet angle, found that when the rotary valve opening time is very small, under these circumstances the jet angle with the valve opening increases, but when the rotating valve opening reaches a certain value, the jet shaped outlet fluid showed a certain angle.the angle approximation close to the flow field in the valve sleeve opening. Seen in the flowchart can. in the same angle, along with the increase of entrance pressure.We can see mass flow rate of export and entrance about showing current growth, at the same pressure, different valve opening of the case, the mass flow rate of fluid through the import and export is about showing a linear relationship. The mass flow rate is the largest in the valve opening is 22.5 degree, entrance pressure is 14MPa, the mass flow rate is 0.19553883kg/s. The velocity vector plots analysis of entrance and exit, can deduce the cavitation location, this is also the future needs to focus on improving and optimizing the place.in addition, say about show a linear relationship because the simulation model is the ideal model, valve opening and the entrance pressure is a discontinuous discrete numerical, need to further strengthen the simulation quantity.