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문수범(Soo Beom Moon),최현규(Hyun Kue Choi),최순열(Soon Yeol Choe),김창복(Chang fu Jin),김경근(Kyung Kun Kim),최순호(Soon-Ho Choi) 대한기계학회 2006 대한기계학회 춘추학술대회 Vol.2006 No.6
An ejector driven by a liquid is a fluid transfer equipment to be used for mixing, for maintaining vacuum, and for overcoming a poor suction condition. At present, most ejectors have been made from the casting process, which is time and cost consuming process. Therefore, a new production method is desired to produce a ejector massively. In this experimental study, we proposed a new type ejector produced from the commercial fitting materials and the welding process with an orifice type motive nozzle. The proposed ejector has a good integrity compared with the conventional ejector because the forging materials of the fittings has more strength than the casting materials. Furthermore, we adopted a multi-opening orifice type nozzle for improving a suction capacity and compared with a single-opening orifice type nozzle. From the experiments, we confirmed that the multi-nozzle had a good suction capacity than the single nozzle and the proposed new type ejector showed higher vacuum than the conventional type ejector in non-load condition. These improved characteristics of a new type one suggests a new manufacturing method to produce an ejector by using the commercial fittings. Therefore, the proposed ejector in this study can considerably reduce the manufacturing time and cost while its performance is largely increased.