Simulation Of Temperature And Flow Field For A Water-cooled Rotating Arc Sensor

Rotating arc sensor is a torch which integrate sensor with torch together by usingthe rotating arc sensing principle to develop out. The conventional cooling structureof the rotating arc sensor only cool the surface of torch off, the cooling effect is notideal. But the quality of cooling structure directly affects the welding quality andusing life of torch. Therefore, an efficient cooling structure is needed.On the basis of the summary of the existing torch cooling structure, this paperproposed a new cooling structure which added directly the cooling chamber onto theconductive rod. On the basis of the structure, according to principles of fluidmechanics、standard k-equations and SIMPLE algorithm, the3-Dflow field ofcooling chamber was simulated on the different cooling chamber structure throughthe FLUENT software. Depending on the speed distribution, the pressure distribution,and the pressure loss of the two models, the better cooling chamber structure weredetermined under the pure flow conditions.At the same time, according to the principles of the heat transfer, this papersimplified the simulation model of water-cooled conductive rod temperature field andbuilt it through the GAMBIT software. The heat transfer of fluid-solid coupling onwater-cooled conductive rod was simulated. According to the cooling chamber forcooling, the difference temperature of cooling water chamber is65℃, the toptemperature of the conductive rod is62℃. The lowering temperature of coolingwater chamber bottom on improved conducting rod model is80℃.The conclusions show that the cooling chamber structure of water-cooledconductive rod was reasonable. The cooling effect is excellent. The cooling chamberplayed a good role on the temperature cutting off.