Global Patent Index - EP 1019633 A1

EP 1019633 A1 2000-07-19 - SCREW-TYPE COMPRESSOR

Title (en)

SCREW-TYPE COMPRESSOR

Title (de)

SCHRAUBENVERDICHTER

Title (fr)

COMPRESSEUR A VIS

Publication

EP 1019633 A1 (DE)

Application

EP 98955416 A

Priority

  • DE 19744466 A
  • EP 9806389 W

Abstract (en)

[origin: DE19744466A1] The auxiliary rotor (16) is supported axially against the driven rotor (14). Only the driven rotor has a rotating bearing face (22) supported axially by a fixed bearing surface (66) of the casing (12). The axial bearing (15) formed by the adjacent faces (22, 66), is a plain bearing. The auxiliary rotor axial support comes exclusively from the interengaging threads (21, 25) of the rotors (20, 26). An hydraulic axial clamping unit (80) preloads the auxiliary rotor towards the outlet side, acting on its shaft (24) or screw. The axial bearing acts against the screw of the driven rotor. This bearing is formed by the rotor axial end wall, running against an annular bearing surface of the casing. These parts together form the plain bearing. The end bearing surface of the driven rotor is formed by a large bearing washer (22). The rotor end wall or washer have radial grooves for lubricant supply. These grooves can have various shapes, e.g. spiral or T-shaped. Part of the end surface of the auxiliary rotor is supported by the bearing washer of the driven rotor. The bearing washer may be cast, screwed or otherwise fixed to the shaft or screw of the driven rotor. A radial bearing surface is applied to the shafts of the rotors.

IPC 1-7 (main, further and additional classification)

F04C 18/16

IPC 8 full level (invention and additional information)

F04C 18/16 (2006.01); F01C 21/02 (2006.01); F04C 29/00 (2006.01)

CPC (invention and additional information)

F01C 21/02 (2013.01); F04C 29/0021 (2013.01); F04C 2240/56 (2013.01)

Citation (search report)

See references of WO 9918355A1

Designated contracting state (EPC)

AT BE CH DE DK ES FR GB GR IE IT LI NL PT SE

EPO simple patent family

DE 19744466 A1 19990422; DE 19744466 C2 19990819; AT 231220 T 20030215; AU 1226599 A 19990427; AU 743902 B2 20020207; CN 1274410 A 20001122; EP 1019633 A1 20000719; EP 1019633 B1 20030115; ES 2191976 T3 20030916; JP 2001519503 A 20011023; RU 2212564 C2 20030920; US 6312239 B1 20011106; WO 9918355 A1 19990415

INPADOC legal status


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