Compressor element for a screw compressor and screw compressor in which such a compressor element is applied

A compressor element of a screw compressor for compressing gas, with the compressor element comprising:

• a housing with an inlet for the gas on an inlet side, and an outlet for the gas on an outlet side;
• and
• two rotor chambers in which two helical rotors are mounted on bearings that upon being driven mesh together in order to compress the gas, said two helical rotors comprising a male rotor with a drive for rotating the male rotor and a female rotor that is driven by the male rotor by means of synchronisation gearwheels with at least one synchronisation gearwheel on the male rotor and one synchronisation gearwheel on the female rotor,
• wherein the drive and the synchronisation gearwheels of the male rotor are chosen such that, upon being driven with acceleration of the rotors of the compressor element without gas forces, a resulting mechanical drive force that is exerted by the drive and by the synchronisation gearwheel on the male rotor has an axial component that is directed in an axial direction from the outlet side to the inlet side and that a movement of the male rotor in the axial direction from the outlet side to the inlet side is fixed by means of a single axial single-acting or double-acting bearing,
• wherein the synchronisation gearwheel of the male rotor is provided with an oblique or helical toothing, whereby a pitch of the oblique or helical toothing of the synchronisation gearwheel and a pitch of the helix of the male rotor with respect to the axial direction of the male rotor have the same orientation.

A compressor element of a screw compressor for compressing gas, with the compressor element comprising:

• a housing with an inlet for the gas on an inlet side, and an outlet for the gas on an outlet side;
• and
• two rotor chambers in which two helical rotors are mounted on bearings that upon being driven mesh together in order to compress the gas, said two helical rotors comprising a male rotor with a drive for rotating the male rotor and a female rotor that is driven by the male rotor by means of synchronisation gearwheels with at least one synchronisation gearwheel on the male rotor and one synchronisation gearwheel on the female rotor,
• wherein the drive and the synchronisation gearwheels of the male rotor are chosen such that, upon being driven with acceleration of the rotors of the compressor element without gas forces, a resulting mechanical drive force that is exerted by the drive and by the synchronisation gearwheel on the male rotor has an axial component that is directed in an axial direction from the outlet side to the inlet side and that a movement of the male rotor in the axial direction from the outlet side to the inlet side is fixed by means of a single axial single-acting or double-acting bearing,
• wherein the female rotor is mounted on axial bearings in the housing by means of two axial bearings that are both mounted on the outlet side of the female rotor and which together block the female rotor in the axial direction, both from the inlet side to the outlet side and from the outlet side to the inlet side.

A compressor element of a screw compressor for compressing gas, with the compressor element comprising:

• a housing with an inlet for the gas on an inlet side and an outlet for the gas on an outlet side;
• and
• two rotor chambers in which two helical rotors are mounted on bearings, which when driven mesh together to compress the gas, said two helical rotors comprising a male rotor with a drive for rotating the male rotor and a female rotor that is driven by the male rotor by means of synchronisation gearwheels with at least one synchronisation gearwheel on the male rotor and one synchronisation gearwheel on the female rotor,
• wherein the compressor element is an inlet-driven compressor element with the drive of the male rotor on the inlet side of the male rotor and the synchronisation gearwheels on the outlet side of the male rotor and that the male rotor is mounted on bearings so that movement of the male rotor in an axial direction from the outlet side to the inlet side is axially fixed by only one single axial bearing that is mounted on the outlet side.