EP 2195511 B1 20111116 - SPIRAL-TYPE POSITIVE-DISPLACEMENT MACHINE
Title (en)
SPIRAL-TYPE POSITIVE-DISPLACEMENT MACHINE
Title (de)
VERDRÄNGERMASCHINE NACH DEM SPIRALPRINZIP
Title (fr)
MACHINE DE REFOULEMENT À SPIRALES
Publication
Application
Priority
- CH 2008000309 W 20080710
- CH 13192007 A 20070822
Abstract (en)
[origin: WO2009023974A1] In a positive-displacement machine for compressible media, having a spiral-shaped delivery chamber (11) arranged in a housing (7b) between cylinder walls (14, 15), a spiral-shaped positive-displacement body is composed of a disk (2) with spiral-shaped strips (3). Said strips (3) are held eccentrically with respect to the housing, in such a way that, during operation, each point of the strip performs a movement which is limited by the peripheral walls of the delivery chamber. The contour (20) of the disk is formed, in the overlapped region of the spiral at the point provided for the mutual sealing of the traversed chambers (11, 16), in the shape of the movement path. The housing edge (19) is formed, as a transition between the raised first part (17) and lowered second part (18) of the outer cylinder wall (14) of the housing, as a bulbous thickened portion. The radial extent 'D' of said thickened portion is at least as great as the degree of eccentricity ('e'). In periods of machine operation, in which a higher pressure prevails in the outer, sickle-shaped working chamber (11) than in the suction chamber (16), said circular-arc-shaped projection (19) together with the contour of the disk forms a sealing line (21) which extends over the height of the projection.
IPC 8 full level
F01C 1/02 (2006.01); F01C 17/06 (2006.01); F01C 19/02 (2006.01); F04C 18/02 (2006.01); F04C 27/00 (2006.01)
CPC (source: EP US)
F01C 17/06 (2013.01 - EP US); F04C 18/0223 (2013.01 - EP US); F04C 18/0269 (2013.01 - EP US); F04C 27/001 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 2009023974 A1 20090226; AT E533920 T1 20111215; CN 101784754 A 20100721; CN 101784754 B 20120725; EP 2195511 A1 20100616; EP 2195511 B1 20111116; US 2011027116 A1 20110203; US 8425211 B2 20130423
DOCDB simple family (application)
CH 2008000309 W 20080710; AT 08757301 T 20080710; CN 200880103733 A 20080710; EP 08757301 A 20080710; US 67406808 A 20080710