Helical rotor pump or compressor - has rotors and stator assembled from series of discs to give required profile

摘要

The machine has two rotors revolving in opposite directions and meshing with each other within a stator casing. The rotors and stator have helical profiles which form spaces varying in volume along the length of the machine. Each rotor is assembled from a series of discs bolted together axially. Each disc has a recess over part of its circumference and the recesses on successive discs are displaced circumferentially from each other. The radius of the remaining parts also varies. The stator is also constructed from a series of discs bolted together axially. This provides an easy method of producing the required profile.