| 摘要 |
The invention relates to an arrangement at oil-injected screw compressors for high pressures. The arrangement is characterized in that the length/diameter ratio of the rotors is lower than 1,3:1, that taper roller bearings in pairs (19-21) are used at both shaft ends (15-18) of the rotors, that the bearings (19,21) at the high-pressure end (13) of the rotors are arranged so that the wider edges of the inner rings of the bearings are facing toward each other and are capable to take up both radial and axial forces, that the bearings (20,22) at the low-pressure end (14) of the rotors are arranged so that the narrower edges of the inner rings of the bearings are facing toward each other and are capable to take up only radial forces, and that oil-pressure actuated balancing pistons (23,24) are provided at the shaft ends (16,18) on the low-pressure end of the rotors to take up the major part of the axial forces initiated by the compressor. |
