Screw compressor element

A screw compressor element for compressing gas, wherein this screw compressor element comprises:

• a housing and two helical rotors that are rotatably affixed in the housing in a double cylindrical chamber provided to this end, composed of two single cylindrical rotor chambers that merge into one another along two axial ribs, and
• wherein the double cylindrical chamber is defined by cylindrical walls of the rotor chambers and two end faces of the housing, respectively, an inlet end face on an inlet side and an outlet end face on an outlet side of the screw compressor element,
• wherein the housing is provided on the inlet side of the screw compressor element with an inlet opening for a supply of a gas to be compressed,
• wherein the inlet opening at least partially extends in the cylindrical walls of the rotor chambers with at least an axial section that extends in an axial direction on either side of one of the aforementioned axial ribs, and a transverse section connected thereto in the form of a strip that extends from a base of the axial section on the inlet side of the screw compressor element at a side of the axial section in a direction essentially transverse to the direction of the axial ribs and connects to the inlet end face on the inlet side or is at a distance therefrom,
• wherein half of the sum of the areas of the axial section on one side of one of the aforementioned ribs, on the one hand, and of a transverse strip on this same side, on the other hand, is less than the area of a traditional inlet opening with a ‘delta’ shape on the side concerned of the aforementioned ribs, less the area of the inlet opening on the side concerned of the aforementioned ribs.

A screw compressor element for compressing gas, whereby this screw compressor element comprises:

• a housing and a helical rotor that is rotatably affixed in a cylindrical chamber in the housing,
• wherein the cylindrical chamber is defined by a cylindrical wall and two end faces of the housing, respectively, an inlet end face on an inlet side and an outlet end face on an outlet side of the screw compressor element,
• wherein the housing on the inlet side of the screw compressor element is provided with an inlet opening for a supply of gas to be compressed,
• wherein the inlet opening at least partially extends in the cylindrical wall of the rotor chambers with at least an axial section that extends in an axial direction in a way such that the supply of gas flows in the axial direction from the inlet side and a transverse section connecting thereto in the form of a strip that extends perpendicularly from a base of the axial section on the inlet side of the screw compressor element away from a side of the axial section in a direction transverse to the axial direction and connects to the inlet end face on the inlet side or is at a distance therefrom.