Patent ID: 6287100
Filing Date: 2001-09-11
Classification: F04C,F16J

Abstract:
A rotary screw compressor having a rotor and at least one rotor shaft peg supported by an oil-lubricated bearing, the compressor further including a sealing arrangement along the rotor shaft peg for establishing a seal between the rotor and the oil-lubricated bearing, the sealing arrangement comprising a housing ring surrounding the shaft peg, in the portion of the housing ring located closer to the rotor, the housing ring including a labyrinth gap seal, which surrounds the shaft peg; in the portion of the housing ring located closer to the oil-lubricated bearing, the housing ring bears a lip seal ring, and in between the lip seal ring and the labyrinth seal, the housing ring defines a ring space with ventilation opening towards the atmosphere, and in that the shaft peg presents a cylindrical circumferential surface, opposite the labyrinth gap seal (11), the sealing arrangement further including a bearing race made of hardened material, which is attached to a shaft peg and works in cooperation with the lip seal ring.