Performance Analysis And Optimal Design Of Hydrostatic Air Bearing In New Energy Vehicle

As an environmentally friendly and efficient power generation device for the new generation of the automotive industry,fuel cells have a very small negative effect on the Camot cycle compared to traditional internal combustion engines,and their energy conversion efficiency can be increased by approximately 30%to 50%.In the core structure of the fuel cell,the air compressor relies on compression to supply air to effectively improve the working efficiency of the fuel cell.There are many types of air compressors.Judging from the research status at home and abroad,most of the research work is mainly centered on centrifugal air compressors.Centrifugal air compressors have small volumes,long working life,and high efficiency due to their small size Characteristics and has good development prospects.In the current overall structure of the centrifugal air compressor,the air bearing is its core component,which is widely used because of its unique advantages such as high precision,high speed,and long life.In this paper,the numerical analysis of the static pressure air bearing is carried out.The three-dimensional mathematical model of the static pressure air bearing is established by combining the relevant equations of hydrodynamics.The current general method for analyzing the characteristics of the static pressure air bearing,the finite difference method,is simplified into two dimensions.Calculate the model,use Matlab programming to numerically solve the bearing model,integrate it to obtain the calculation method of the bearing capacity of the air static pressure bearing,and obtain the static stiffness of the air static pressure bearing by analyzing the change of the gas film pressure caused by the change of the film thickness The calculation method of the calculation method is to obtain the calculation method of the air volume flow of the bearing by analyzing the air flow in the orifice,and the relevant expression of the main performance of the static pressure air bearing is obtained.Based on the main performance of the static pressure air bearing calculated above,the hydrodynamic simulation analysis of the static pressure air bearing is performed,and the relevant characteristics of the air bearing model are solved using Fluent software,thereby obtaining the air film at the air bearing and the surface orifice Cloud chart of pressure change and gas film flow rate change.Through the static performance analysis of the air bearing,the main performance indicators of the air bearing are studied,such as the bearing capacity,stiffness,and air volume flow of the air bearing.The idea of multi-objective optimization is used to optimize the design of the air bearing,and the specific influence of the bearing size parameters and other factors on the performance of the air bearing is analyzed.At the same time,the particle swarm optimization algorithm is used to perform multi-objective optimization design on the existing air bearing structure,and the ideal optimal structure size parameters are obtained.In this paper,the numerical calculation of the static pressure air bearing is mainly carried out,the expression of the main characteristics of the static pressure air bearing and the related parameters affecting its characteristics are obtained,and the structure is optimized by the particle swarm optimization algorithm.The performance of compressed air bearings provides a new design idea for the processing and manufacturing of static air bearings.