EP 2235374 A2 20101006 - VARIABLE-VOLUME INTERNAL GEAR PUMP
Title (en)
VARIABLE-VOLUME INTERNAL GEAR PUMP
Title (de)
VOLUMENVERÄNDERBARE INNENZAHNRADPUMPE
Title (fr)
POMPE À ENGRENAGE INTÉRIEUR, À VOLUME VARIABLE
Publication
Application
Priority
- EP 2009050630 W 20090121
- EP 08100673 A 20080121
- EP 09704115 A 20090121
Abstract (en)
[origin: US2011038746A1] The invention relates to a variable-volume internal gear pump, in particular for use as an engine lubrication pump for automobiles. The internal gear pump comprises a housing (7, 10) and a rotor set chamber (40) formed therein comprising a low pressure chamber (17) and a high pressure chamber (18) for a fluid. Inside the rotor set chamber (40) are an inner rotor (2) that can be rotatably driven by a shaft (1) about an axis of rotation (Di) and a rotatable outer rotor (3) with an outer rotor axis of rotation (Da) that is arranged eccentric with respect to the axis of rotation (Di). When a rotational force is applied, conveyance cells (30, 31) form between the inner rotor (2) and the outer rotor (3) in which the fluid is conveyed from the low pressure chamber (17) to the high pressure chamber (18). An adjusting member (5) upon which axial springs (8) act and which is guided in the internal gears (34) of the outer rotor (3) in axial motion causes a pressure-related axial movement of the inner rotor (2). The outer rotor (3) comprises radial channels (41) in the gaps between the teeth of the internal gears (34) thereof proximate to the low pressure chamber (17) and the high pressure chamber (18). The axial position of the inner rotor (2) relative to the outer rotor (3) can be adjusted by the axial motion of the adjusting member (5), whereupon the volume of the conveyance cells (30, 31) changes depending on the pressure.
IPC 8 full level
F04C 2/10 (2006.01); F04C 14/18 (2006.01)
CPC (source: EP US)
F04C 2/102 (2013.01 - EP US); F04C 14/185 (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 MK MT NL NO PL PT RO SE SI SK TR
Designated extension state (EPC)
AL BA RS
DOCDB simple family (publication)
WO 2009092719 A2 20090730; WO 2009092719 A3 20091203; AT E517262 T1 20110815; CA 2712550 A1 20090730; EP 2235374 A2 20101006; EP 2235374 B1 20110720; US 2011038746 A1 20110217
DOCDB simple family (application)
EP 2009050630 W 20090121; AT 09704115 T 20090121; CA 2712550 A 20090121; EP 09704115 A 20090121; US 86389909 A 20090121