| Disc centrifuge is an efficient centrifugal separation machine,but there is a high temperature rise in the actual operation.The high temperature in the centrifuge will result in a significant reduction in separation efficiency,reduced working time,increased cost of manual cleaning,and a change in the thermal balance of the drum,affecting the safe and stable operation of the centrifuge.Therefore,it is of great significance to study the temperature rise process and heat dissipation problem of disc centrifuge.In this paper,the three-dimensional model of the centrifuge was established.Based on the basic theory of heat transfer and hydrodynamics,the CFD numerical simulation of the flow field of the centrifuge cavity was carried out.According to the simulation results,the temperature distribution of the centrifuge cavity area and the drum wall,and the heat transfer condition on the different surfaces in the centrifuge were obtained.Combined with the law of air flow in the cavity,the temperature rise and heat dissipation characteristics of the centrifuge were analyzed.Then,the thermocouple was measured at different positions in the LX660 disc centrifuge,and the temperature rise test and the brake test were carried out.The temperature rise curve of each measuring point was obtained by temperature experiment.The temperature rise process and temperature field distribution of the centrifuge were studied.The reliability of the simulation results was verified and the heat transfer law of the centrifuge was analyzed.Based on the brake experiment,the motor brake and electromagnetic brake devices were compared on the centrifuge temperature rise.Finally,the numerical simulation of the flow field and temperature field of the centrifuge cavity under different working conditions was carried out.The effects of different rib structure,drum speed,inlet velocity and environmental factors on the temperature rise and heat transfer characteristics of the centrifuge were analyzed and compared. |
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