A process for the discharge - generating in the vapors of a radio frequency electrode for prolonged even sputtering and evaporation of the electrode

摘要

The invention relates to a device for connecting a screw rotor machine provided with a male rotor (1) and a female rotor (2), especially a supercharger/expander for an internal combustion engine, to an exterior driving or driven pulley (28), wherein one end of the rotors is provided with shaft pivots (5, 6) to which pulleys (12, 16) are attached for coupling the rotors by means of a belt (29) to the exterior pulley. The device permits changing between two different gear ratios relative to the exterior pulley by the pulley (16) of the female rotor (2) being attached to its shaft pivot (6) via an engageable and disengageable clutch (18), and the pulley (12) of the male rotor (1) being attached to its shaft pivot (5) via a freewheel clutch (14) permitting the shaft pivot (5) to rotate faster than the pulley (12) when the clutch (18) of the female rotor is engaged.