US 11,873,812 B2
Rotary pump comprising an adjusting device
Moritz Raatschen, Bad Schussenried (DE); Thomas Finsterle, Ravensburg (DE); Fabian Eisele, Herbertingen (DE); and Gerd Jäggle, Ertingen (DE)
Assigned to Schwäbische Hüttenwerke Automotive GmbH, Aalen (DE)
Filed by Schwäbische Hüttenwerke Automotive GmbH, Aalen (DE)
Filed on Sep. 30, 2022, as Appl. No. 17/957,449.
Claims priority of application No. 10 2021 125 709.3 (DE), filed on Oct. 4, 2021.
Prior Publication US 2023/0105862 A1, Apr. 6, 2023
Int. Cl. F03C 2/00 (2006.01); F03C 4/00 (2006.01); F04C 2/00 (2006.01); F04C 2/067 (2006.01); F04C 14/22 (2006.01); F04C 2/344 (2006.01)
CPC F04C 14/226 (2013.01) [F04C 2/344 (2013.01); F04C 2/3441 (2013.01)] 16 Claims
OG exemplary drawing
 
16. A rotary pump having an adjustable delivery volume, the rotary pump comprising:
(a) a pump housing having a low-pressure inlet and a high-pressure outlet for a fluid to be delivered; and
(b) a delivery rotor arranged such that it is rotatable about a rotational axis in the pump housing and comprising multiple delivery means which are distributed over a circumference of the delivery rotor for delivering the fluid from the low-pressure inlet to the high-pressure outlet; and
(c) a setting element which is adapted to be translationally moved back and forth in relation to the pump housing for adjusting the delivery volume of the rotary pump, wherein
(d) an inlet end of the setting element comprises:
(d1) a first circumferential portion which extends circumferentially in a rotational direction of the delivery rotor and an axial width of which is smaller than an axial width of the delivery means and
(d2) a second circumferential portion which adjoins the first circumferential portion in the rotational direction of the delivery rotor and an axial width of which is greater than the axial width of the first circumferential portion, wherein
(e) a transition, in the rotational direction of the delivery rotor, from the first circumferential portion to the second circumferential portion is arranged in the low-pressure inlet in each position of the setting element,
wherein the axial width of the second circumferential portion corresponds to or is smaller than the axial width of the delivery means,
wherein the second circumferential portion comprises a cavity which is radially open towards the delivery rotor and is not axially continuous, and the cavity exhibits a circumferential extent, from the first circumferential portion in the rotational direction of the delivery rotor, which at most corresponds to a maximum distance between two adjacent delivery means as measured in the circumferential direction.