Study On Structure And Dynamic Characteristics Of Single Net Algae Cleaning In South To North Water Diversion Channel

The South-to-North Water Diversion Project is a strategic project aimed to alleviate the shortage of water resources in North and Northwest China.To enable the social benefits of South-to-North Water Transfer Project effectively exerted,various factors that may adversely affect the water quality in the process of water transfer are necessarily and comprehensively considered to ensure the water quality.In recent years,more and more pollutants are found in the water channel of the middle line of the South-to-North Water Diversion Project,among which the seasonal outbreak of planktonic algae makes the water turbid and has a serious impact on the water quality of the South-to-North Water Diversion Channel.The variety of planktonic algae is difficult to handle.Not only the water quality obtained in the water receiving area will be reduced,but also increase the post-processing cost of the water plant,resulting in a significant reduction in the water quality and economic benefits of the Midline Project of the South-to-North Water Diversion Project,which arouses public concern.Therefore,how to ensure the water quality of the aqueduct and effectively algae remove has become a prominent problem that needs to be solved.Through the overall study of the actual situation of the Middle Route Project of South-to-North Water Diversion,a single-net type algae-cleaning equipment was designed in this dissertation.The mechanical automation equipment was designed to work on the water transfer diversion gate of the South-to-North Water Transfer Project.The wire mesh device for underwater capture of algae was driven by a wire rope and then to the top of the algae-removal water tank driven by an electric push rod,where algae on an algae barrier net was cleared by a dedicated flushing device to realize the integrates of interception,cleaning and treatment of algae.The three-dimensional model of the algae removal system was established through the three-dimensional software SOLIDWORKS,and imported into the finite element analysis software ANSYS.The static analysis of the key components was completed in the 3D model based on the Workbench module,it was concluded that the maximum deformation and the maximum equivalent stress under the load meet the normal working conditions.The three-dimensional model created by SOLIDWORKS was imported into multi-body system dynamics analysis software ADAMS.Dynamics simulation and analysis of the tilting mechanism was performed through the View module.The motion trajectory of the specified point of the mechanism and the curve of the speed and acceleration of the mechanism movement was obtained.The algae removal machinery and equipment designed in this dissertation had been used in the channel of the Middle Route of South-to-North Water Diversion.The test proved that the equipment could meet the requirements of institutional flexibility and manufacturing process with the characteristics of easy operation,obvious effect,high degree of automation,and environmental protection,and has certain guiding significance for algae removal in the South-North Water Transfer Project.