Study On Transport Technology Of Weight By Aerostatic Levitation

Compared with the traditional transportation technology,the aerostatic levitation technology is widely used in shipbuilding,logistics,aerospace,oil drilling,large mechanical assembly and so on,because of its high cost-effectiveness,strong adaptability and environment-friendly energy.In this paper,the suspension mechanism of the air cushion module is simulated,and the experimental principle is verified by combining simulation and experiment with the hydrostatic air cushion transport technology of heavy load object as the research object.The general law of hydrostatic suspension with low pressure and large flow rate is obtained.Finally,a design example is given to complete the overall scheme design of20-ton load hydrostatic suspension platform.The air cushion assembly is simplified,the geometric model and mathematical model are obtained.In this paper,the finite volume method(FVM)of fluid is introduced,the structured grid is drawn by ICEM,and the flow field in gas chamber is simulated by Fluent solver.The relations among transient inflating time,gas consumption,load mass and film thickness are obtained.Through the simulation analysis of the steady and transient models,the relations of steady time,net air flow and steady torque under different conditions are obtained.A suspension experimental platform and a corresponding testing system for heavy load objects are built,and the principle verification experiment of the suspension platform is completed.By adjusting the static and dynamic experiments of different parameters under various operating conditions,the variation of suspension height,film thickness and load mass is obtained.The concepts of critical pressure and critical mass are put forward and defined theoretically.The vibration frequency of the suspension platform beyond the critical pressure is measured,and the vibration curves of the suspension height and inlet pressure are obtained,which provides a reference for the modal analysis of the suspension platform.By testing the suspension resistance coefficient of different materials,the more optimized track material is selected.Finally,an example is given to design the overall scheme of the hydrostatic suspended transport platform under the load mass of 20 tons.The interior ballistic characteristics and thrust characteristics of the combustion gas cylindrical actuator with high-pressure bunker are simulated by using Matlab/Simulink,and the characteristic curves of the interior ballistic characteristics of the gas-actuator roller with the high-pressure bunker are obtained.The characteristics of pressure coupling between high pressure bunker and low pressure bunker are analyzed.After loading the power system into the suspension system,the simulation results show that the overall design requirements are satisfied.