SCREW COMPRESSOR

PROBLEM TO BE SOLVED: To increase a mass flow rate of a working gas in a screw compressor by suppressing a scattering amount of liquid to a suction port.SOLUTION: In the screw compressor, a male-and-female pair of rotors having a twisted lobe are engaged with each other and rotate, a gas shut in a working space 5 formed by both of the rotors and a casing is compressed while the liquid is poured into the gas, and a beam 7 is provided, in particular, between the suction port 3 and a gap 6 between the male-and-female rotors. A distance from the center line 8 of an engagement part to an end on a male rotor 2 of the beam 7 is longer than a distance from the center line 8 of the engagement part to an end on a female rotor 1 of the beam 7.