Patent ID: 6488488
Filing Date: 2002-12-03
Classification: F01C,F04C

Abstract:
A screw compressor with two rotors mounted in a rotor housing (3) with parallel axes, that engage one another with screw-shaped teeth and tooth gaps, and that convey air during operation from a suction end toward a pressure end of the rotor housing (3) and in the process compress the air,with a gear housing (1) located at one end of the rotor housing (3) in which a drive shaft (17) is mounted with drive gears (19, 21) for the rotors (9, 11) and in which oil lubrication is provided for the drive gears, and with a synchronizing gear (25, 27) that couples the rotors (9, 11) to run together in opposite directions synchronously without touching, characterized in that the drive gear (19, 21) and the synchronizing gear (25, 27) are both located in the gear housing (1) on the pressurized end of the rotor housing (3) and that bearings (53) for suction side shaft journals (55, 57) of the rotors (9, 11) are free of oil lubrication and are located in an inlet housing (4) that closes off the rotor housing (3) at the suction end, said housing exhibiting inlet openings (13) for the air intake by the rotors (9, 11) in a way that allows the section of the inlet housing (4) containing the bearings 53 to be cooled by means of the intake air, and that the inlet housing (4) is surrounded at a distance by an intake housing (5) attached to the rotor housing (3) that has at least one intake opening (69) and in which is located a filter (6) and a muffler insert (75) in the flow path of the air from the intake opening (69) to the inlet openings (13).