ROTERANDE SKRUVKOMPRESSOR FOR VARIABEL EFFEKT MED FOR VARIABELT HOGTRYCK AVSEDDA SUGINLOPP

摘要

A variable capacity multiple inlet rotary screw compressor having a pair of helical rotors mounted within a housing for compressing fluid drawn from a low pressure suction fluid chamber and a high pressure suction fluid chamber and discharging to a discharge chamber. A slide valve is provided in the housing to control the capacity of the compressor by changing the point of low pressure suction fluid cut off to the rotors. The point of high pressure suction fluid admission being changed in synchronism with the movement of the slide valve to connect the working chambers of the rotors to the high pressure fluid suction fluid chamber simultaneously with or just after low pressure suction fluid cut off.