| 摘要 |
Nozzle for plasma arc torch includes internal and external forming nozzles mounted one within other and fitted to the torch housing to form first and second gaps. The first gap is formed between the torch cathode and the internal nozzle, an internal vortex generator mounted in it. An external vortex generator is fitted in the second gap and is connect to races machined in the torch housing. A forming canal is designed in the front end of the internal nozzle and an intermediary nozzle is mounted between the internal and external nozzles. A third gap is formed between it and the internal nozzle, and the second gap is formed between the intermediary and the external nozzle. A second forming race coaxial with that of the internal nozzle is provided in the front part of the intermediary nozzle, thus forming a common forming race. An intermediary vortex generator with tangential races is included in the contact surface of the intermediary and internal nozzles. The tangential races are connected by their ends to the common forming race, and to an internal circular race on the intermediary nozzle. This race is connected by holes to an external circular race connected with a pipe connection. The second gap is connected to the housing races by means of the external vortex generator, connecting races of the intermediary nozzle and third gap. The connecting races are designed above the intermediary vortex generator. |
