Research On Design Of Low Speed Heavy Load Air Cushion Suspension Support System

Compared with the traditional contact support technology,the air cushion suspension support technology has the advantages of no wear,no pollution,low energy consumption and simple structure,and is widely used in heavy equipment such as precision machine tool guides,hovercrafts,hovercrafts and hover belt conveyors.In this paper,the low-speed and heavy rotating simulation equipment drive system is taken as the research background,the air cushion suspension support system is designed,and the structural parameters affecting the air cushion bearing performance are analyzed and optimized.The air cushion pressure proportional control system is used to realize multi-cushion synchronous suspension,which makes it have good adaptability and stability to the site and environment.The host computer control software has been written and has good human-computer interaction functions.Firstly,this paper establishes a mechanical model under static,rotating and wind load conditions,aiming at the actual operating conditions of low-speed and heavy-load rotation simulation equipment.Then,the basic structure and air pressure control circuit of the air bearing unit were determined,and the impedance characteristics of the system were analyzed.Secondly,the finite element analysis software Fluent is used to study the characteristics of the gas film flow field of the beari ng unit.The quantitative analysis of the gas film overflow process,the gas film pressure field,and the gas film stiffness is performed.AT the same time,the air cushion structure parameters were optimized to obtain the optimal film thickness parameter range.Then,the transfer function of air cushion pressure control is obtained by adopting the air pressure driving proportional control method.Based on conventional PID and self-tuning control strategies,the system stability conditions are analyzed,and the system dynamic characteristics and control accuracy are improved.Finally,the system hardware and software systems are designed and the control software of the upper computer of the pneumatic system is designed with a clear interface,complete functions,based on the Labview development environment and good human-computer interaction.