Research On Key Technologies Of Vertical Air Cushion Belt Conveyor

The vertical air cushion belt conveyor has a special structure.In the vertical conveying part,the materials are clamped by the conveyor belts on both sides,so that the vertical lifting can be realized.In addition,there are vertical air chambers with air holes on both sides of the conveyor belt.When the conveyor operates stably,an air film will be formed between the conveyor belt and the air chamber,which greatly reduces the energy loss.Because the vertical air cushion belt conveyor has the above characteristics,it is widely used in ports,mines and other fields.However,with the continuous development of social production,the research on vertical air cushion belt conveyor can not meet the needs of production practice.It is necessary to analyze the relationship between various parameters and further study its operation mechanism,so as to optimize the structure,improve the conveying efficiency and reduce energy consumption.For the vertical air cushion belt conveyor,the vertical conveying part is one of the most critical parts,and its structure determines whether the conveyor can operate stably.In the vertical conveying part,it is mainly composed of material column,conveyor belt,air chamber and air film.The material column is used as the lifting load.In order to realize stable conveying,the air chamber and air film should be designed according to their stress state.In short,the stress state of the material column determines the structural form of the gas chamber and gas film,which will also affect the stable lifting of the material column.In this paper,the main research is about the vertical conveying part of the conveyor.Firstly,starting from the characteristics of the material,the stress of the material column is calculated;Then,the relevant theories of fluid mechanics are used to judge the gas state in the vertical chamber,and the calculation formula of chamber pressure is deduced;Then,the load,flow field and thickness of the gas film are studied;Finally,the models of the vertical air chamber of the vertical conveying part and the upper and lower gas film in the vertical direction are established through the three-dimensional modeling software,and imported into ANSYS Workbench for numerical simulation analysis.The optimization of the disk groove radius of the vertical gas chamber is studied.The outlet pressure of the gas chamber under different disk groove radius and different inlet pressure is simulated,and an optimal disk groove radius of the gas chamber is obtained.The pressure optimization research is carried out for the gas film in the vertical direction,and the pressure value of the material under different gas film pressure and different air hole row number is simulated and analyzed.The results show that when the air hole row number does not change,there is the best air hole pressure value under the condition of meeting the vertical lifting of the material.Under this pressure,there will be no waste of energy,and the best pressure value decreases with the increase of air hole row number.In view of the influence of the number of pore rows on the gas film pressure,it is found that the gas film pressure becomes stable with the increase of the number of pore rows by listing and drawing.In addition to the vertical distribution of stomata,the vertical distribution of stomata was studied.The research results of this paper lay a certain foundation for the structural optimization of vertical air cushion belt conveyor.