Rubber Coating Optimization And Fluid-thermal-solid Interaction Analysis Of Twin-screw Compressor Rotor

Twin-screw compressor has the advantages of high reliability,convenient operation and maintenance,good power balance and strong adaptability,so it is widely used in mining,metallurgy,refrigeration,food and other industries.The core component of the twin-screw compressor is a pair of meshing male and female rotors,and its performance is very important to the performance and life of the compressor.Male and female rotors are prone to wear,fatigue,pitting and other problems,which can easily lead to lower air tightness,lower efficiency,unstable operation,and may also lead to serious accidents.Rubber has the advantages of elasticity,wear resistance and good air tightness,while screw compressors need good air tightness to improve work efficiency.Combined with the advantages of rubber,the rubber coating is improved to verify the mechanical properties of the twin-screw compressor rotor,and the multi-field interaction numerical analysis of the compressor is carried out by comprehensively considering the pressure field and temperature field of the compressor.Verify the structural characteristics of the rubber coated rotor.The main work is as follows:Analysis of geometric characteristics of the twin-screw compressor.To a certain type of 1m~3screw compressor,the MATLAB software is used to calculate the inter-tooth volume of the rotor,the variation law of the inter-tooth volume,the pressure distribution under different rotation angles of the male rotor and the value of the suction angle and exhaust angle.Rubber coating optimization of the twin-screw compressor rotor.First,the three-dimensional model of the rotor with rubber coating is established with Solid Works software;then the mechanical properties of the rotor with and without rubber coating are analyzed;finally,the rotors with different thickness of rubber coating are simulated and analyzed,and the results show that the performance of the rotor with 0.8mm rubber coating is the best.Fluid dynamics simulation of internal flow field of twin-screw compressor.First,the fluid domain model of the twin-screw compressor is established with Space Claim software.Then the internal flow field of the twin-screw compressor is analyzed with CFD technology.Finally,the distribution rules of pressure field and temperature field in the compressor are obtained.Fluid-thermal-solid interaction analysis of rotor without rubber coating and rubber coating rotor.First,the static balance equation of rotor structure is solved.Then the distribution of equivalent stress and equivalent elastic strain of 0.8mm rubber coating rotor and rotor without rubber coating under the conditions of torque,fluid-solid interaction,thermal-solid interaction and fluid-thermal-solid interaction are studied,and the results verify the advantages of 0.8mm rubber coating rotor in mechanical properties and air tightness of compressor.