	US 12,000,391 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-Wasseralfingen (DE)
Appl. No. 17/414,192
Filed by Schwäbische Hüttenwerke Automotive GmbH, Aalen-Wasseralfingen (DE)
PCT Filed Dec. 27, 2019, PCT No. PCT/EP2019/087123 § 371(c)(1), (2) Date Jun. 15, 2021, PCT Pub. No. WO2020/136277, PCT Pub. Date Jul. 2, 2020.
Claims priority of application No. 10 2018 133 680.2 (DE), filed on Dec. 28, 2018.
Prior Publication US 2022/0145884 A1, May 12, 2022
Int. Cl. F04C 2/356 (2006.01); F01C 19/00 (2006.01); F04C 2/344 (2006.01); F04C 14/06 (2006.01); F04C 15/00 (2006.01)

CPC F04C 15/0023 (2013.01) [F01C 19/005 (2013.01); F04C 2/3446 (2013.01); F04C 15/0026 (2013.01); F04C 15/0034 (2013.01); F04C 2240/30 (2013.01)]

20 Claims

1. An outlet gasket which has a gasket structure made of a gasket material, for sealing off a first pressure outlet and a second pressure outlet of a pump and separating the first pressure outlet from the second pressure outlet, the gasket structure comprising:

a first sealing stay which circumferentially encloses a first fluid passage of the outlet gasket, provided for the first pressure outlet, in a seal in an axial plan view onto the outlet gasket; and

a second sealing stay which circumferentially encloses a second fluid passage of the outlet gasket, provided for the second pressure outlet and located laterally next to the first fluid passage, in a seal in the plan view,

wherein the gasket structure forms the sealing stays contiguously as a unit, and/or the outlet gasket comprises a support structure on which the sealing stays are arranged, and the gasket structure is fixedly connected to the support structure, and the support structure extends, in the plan view, into the first fluid passage and/or into the second fluid passage in order to form a flow resistance in the region of the respective fluid passage for pressure fluid flowing through the respective fluid passage,

wherein the outlet gasket comprises the support structure, and in the plan view, the support structure completely or at least mostly fills the cross-sectional area of the respective fluid passage and has one or more passages which are narrower than the cross-sectional area of the respective fluid passage, in order to form the flow resistance as a perforated shutter or in the manner of a perforated shutter.

12. An outlet gasket which has a gasket structure made of a gasket material, for sealing off a first pressure outlet and a second pressure outlet of a pump and separating the first pressure outlet from the second pressure outlet, the gasket structure comprising:

a first sealing stay which circumferentially encloses a first fluid passage of the outlet gasket, provided for the first pressure outlet, in a seal in an axial plan view onto the outlet gasket; and

wherein the outlet gasket has a first flange and a first bulge projecting axially from the first flange;

the first flange extends around the first bulge and the first fluid passage;

and wherein

the first sealing stay extends along the end-face side of the first flange facing axially away from the first bulge and is fixedly connected to the first flange,

and/or

the outlet gasket comprises a first circumferential region, made of the gasket material, which extends along an outer circumference of the first bulge and is fixedly connected to the outer circumference of the first bulge, in order to form a plug connection and/or a first radial sealing stay with a pump housing when the outlet gasket is arranged on the pump housing.

15. A pump for supplying an assembly with a pressure fluid, the pump comprising:

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;

a rotor, which can be rotated 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;

a pump housing comprising a circumferential wall, which surrounds a from a low-pressure side of the pump to a high-pressure side of the pump;

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 can be discharged from the delivery chamber;

wherein the pump is optionally a multi-flux pump and has a first flux comprising the pressure outlet as a first pressure outlet and a second flux comprising a second pressure outlet which emerges on the outer end-face side of the first end-face wall next to the first pressure outlet; and

an outlet gasket, which has a gasket structure made of a gasket material, for sealing off a first pressure outlet and a second pressure outlet of a pump and separating the first pressure outlet from the second pressure outlet, the gasket structure comprising:

a first sealing stay which circumferentially encloses a first fluid passage of the outlet gasket, provided for the first pressure outlet, in a seal in an axial plan view onto the outlet gasket; and

wherein the outlet gasket is provided on the outer end-face side of the first end-face wall, for sealing off the pressure outlet and, if provided, also on the second pressure outlet.