Patent ID: 6848891

Claim:
A refrigerant compressor, comprising: an overall casing, an electric motor disposed in the overall casing with a stator and a rotor, a screw compressor disposed in the overall casing, a compressor screw of which is rotatably mounted in the overall casing, and a drive shaft, said drive shaft being a one-piece part extending in an axial direction beyond both sides of the rotor and said compressor screw and bearing the rotor and said compressor screw, said drive shaft being rotatably mounted in said overall casing by a first radial roller bearing between the rotor and the compressor screw and a second radial roller bearing disposed on a side of the compressor screw lying opposite the first radial roller bearing, and said drive shaft being mounted in the overall casing by a third radial roller bearing which is disposed on a side of the rotor lying opposite the first radial roller bearing, the drive shaft which extends between the third radial roller bearing and the second radial roller bearing being adapted to compensate for alignment errors between the three radial roller bearings.