Stress Analysis And Numerical Simulation Of Moving Parts Of Piston Compressor

Energy demand was a necessary condition for the rapid economic growth of our country.High-efficiency and low-energy-consumption air-conditioning products had important energy-saving effects not only for the majority of users but also for the entire society.As an important part of refrigeration system,compressor efficiency was very important to unit performance.The force analysis and numerical simulation of piston and connecting rod in compressor were to provide reference for the research of compressor in later period.The mathematical model of piston and connecting rod established and the motion law of piston studied with MATLAB.The results showed that the displacement,velocity and acceleration of piston change periodically with the crank angle.From bottom stop to top stop of the piston,the displacement increase gradually,and the maximum value is about 20 mm.The velocity firstly increase and then decrease,the acceleration firstly decrease and then increase.At the top and bottom stop,the maximum acceleration is about 1.2×106 mm/s2.When the crank angle is 270°,the speed of piston is maximum.The maximum speed is about 3900mm/s.The three-dimensional model of refrigerant piston and connecting rod built with Solid Works,the model meshed and simulated the temperature field and pressure field with FLUENT,and obtained the variation law of temperature and pressure of refrigerant gas in the cylinder with the crank angle when the piston reciprocated a week.The temperature and pressure of the refrigerant increase first and then decrease with the crank angle.The dynamic analysis of piston and connecting rod is carried out with ANSYS software,the piston temperature,stress and deformation increase with the increase of crank angle from bottom to top.When the piston reciprocates,the connecting rod is subjected to the combined action of tension and pressure,which indicates that the position of the connecting rod body near the big head is the highest stress value and the most severe damage Figure 36;Table 6;Reference 56...