Research And Design Of Oil Distribution System Of MD2.5 Diaphragm Compressor

The diaphragm compressor is a special structure gas compressor.The special diaphragm is used to separate the compressed gas from the liquid.The sealing performance is good,the compression ratio is high,and the cylinder does not need lubrication.Since the compressed gas is not in contact with any lubricant,the diaphragm compressor can be used to compress extremely high purity gas,and is widely used for compressing and conveying various high purity gases,precious rare gases,toxic and harmful gases and corrosive gases.Since the diaphragm compressor requires liquid as the medium for energy transfer,its oil chamber structure directly affects the energy consumption of the liquid in the chamber,which has an important influence on the working efficiency of the machine.According to the analysis,the internal flow field change of the oil chamber and the size of the oil chamber structure have significant influence on the energy consumption,which is of great significance to the internal flow field analysis and structural optimization of the diaphragm compressor oil chamber.In this paper,MD2.5 diaphragm compressor is taken as the research object,and the two-dimensional model and local three-dimensional model of oil chamber structure are established.The model is meshed and numerically simulated by CFD simulation software.The flow field distribution inside the oil chamber structure is analyzed.The structural optimization study of the oil chamber was carried out.The main research contents of this paper are:1.According to the functional requirements and design parameters of the MD2.5 diaphragm compressor,the oil chamber structure model is established,and the design of the oil chamber structure optimization process is based on CFD software.2.Establish the physical model of the initial oil cavity and the mathematical model of the computational fluid.The FLUENT software is used to simulate and analyze the internal flow field of the initial oil cavity structure,and the flow characteristics of the liquid in the oil cavity channel are analyzed according to the turbulent flow energy distribution.3.Based on the single factor numerical simulation method,several structural factors affecting the liquid flow performance were compared and compared.According to the simulation results,the influence of different oil cavity structure sizes on the liquid flow performance was discussed to optimize the size of the crude oil cavity structure.These include cylinder liner fillet,oil distribution plate convex structure,cone angle,oil distribution plate aperture and so on.4.The simulation analysis of the optimized structure results,compared with the liquid kinetic energy consumption in the oil chamber before and after optimization,the results show that the sealing effect of the optimized sealing structure is better than the initial structure.It effectively reduces the kinetic energy consumption caused by the liquid as the medium for energy transfer,and provides a reliable reference for engineering practice design.