US 11,746,780 B2
Rotary pump with axial compensation, outlet gasket for a pump and pre-fitted pump unit
Claus Welte, Aulendorf (DE)
Assigned to Schwäbische Hüttenwerke Automotive GmbH, Aalen (DE)
Appl. No. 17/268,504
Filed by Schwäbische Hüttenwerke Automotive GmbH, Aalen-Wasseralfingen (DE)
PCT Filed Dec. 27, 2019, PCT No. PCT/EP2019/087113
§ 371(c)(1), (2) Date Feb. 15, 2021,
PCT Pub. No. WO2020/136269, PCT Pub. Date Jul. 2, 2020.
Claims priority of application No. 10 2018 133 681.0 (DE), filed on Dec. 28, 2018.
Prior Publication US 2021/0254619 A1, Aug. 19, 2021
Int. Cl. F04C 2/10 (2006.01); F01C 19/00 (2006.01); F04C 29/02 (2006.01); F04C 15/00 (2006.01); F04C 15/06 (2006.01)
CPC F04C 2/10 (2013.01) [F01C 19/005 (2013.01); F04C 15/0023 (2013.01); F04C 15/06 (2013.01); F04C 29/02 (2013.01); F04C 2240/20 (2013.01); F04C 2240/30 (2013.01); F04C 2240/80 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A rotary pump for supplying an assembly with a pressure fluid, the pump comprising:
1.1 a pump housing comprising a circumferential wall, which surrounds a delivery chamber of the pump, a first end-face wall and a second end-face wall which delineate the delivery chamber at its end-face sides;
1.2 a rotor, which is rotatable about an axis of rotation in the delivery chamber, for forming delivery cells which periodically increase and decrease in size as the rotor rotates, in order to deliver pressure fluid from a low-pressure side of the pump to a high-pressure side of the pump;
1.3 a pressure outlet which emerges on an outer end-face side of the first end-face wall facing away from the delivery chamber and through which pressure fluid is dischargeable from the delivery chamber;
1.4 an outlet gasket which is provided on the outer end-face side of the first end-face wall, for sealing off the pressure outlet; and
1.5 a pressing device for charging the outlet gasket with an axial pressing force for pressing the outlet gasket against an attaching wall of an accommodating device which lies axially opposite the outer end-face side of the first end face wall when fitted,
1.6 wherein the pump housing is fittable on the accommodating device by means of a fitting structure which is a component part of the pump, such that the first end-face wall axially faces the attaching wall of the accommodating device, and wherein
1.7 the pump housing is axially movable relative to the fitting structure and is axially supported on the fitting structure via the pressing device and wherein the pressing device comprises a spring device which acts in an axial direction between the pump housing and the fitting structure in order to generate a spring force which forms at least part of the pressing force, and/or
1.8 wherein the outlet gasket is axially movable relative to the pump housing and is axially supported on the pump housing via the pressing device and wherein the pressing device comprises the spring device which acts in the axial direction between the pump housing and the outlet gasket in order to generate the spring force which forms at least part of the pressing force.