US 11,719,240 B2
Reduced-noise rotary pump
Fabian Eisele, Herbertingen (DE); Thomas Wahl, Ertingen (DE); Sven Peters, Bad Schussenried (DE); Gerd Jäggle, Ertingen (DE); and Igor Pekrul, Aulendorf (DE)
Assigned to Schwäbische Hüttenwerke Automotive GmbH, Aalen (DE)
Filed by Schwäbische Hüttenwerke Automotive GmbH, Aalen-Wasseralfingen (DE)
Filed on Mar. 16, 2021, as Appl. No. 17/202,744.
Claims priority of application No. 102020107485.9 (DE), filed on Mar. 18, 2020.
Prior Publication US 2021/0293238 A1, Sep. 23, 2021
Int. Cl. F03C 2/00 (2006.01); F03C 4/00 (2006.01); F04C 18/00 (2006.01); F04C 2/00 (2006.01); F04C 2/344 (2006.01); F04C 2/332 (2006.01); F04C 14/22 (2006.01); F04C 15/00 (2006.01)
CPC F04C 2/3442 (2013.01) [F04C 2/332 (2013.01); F04C 2/3448 (2013.01); F04C 14/226 (2013.01); F04C 15/0049 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A rotary pump comprising:
(a) a stator and
(b) a rotor rotatable about a rotational axis within the stator, wherein
(c) the rotor comprises multiple delivery elements adapted to move radially in relation to the rotational axis, and
(d) two adjacent delivery elements limit a delivery cell together with an outer surface area of the rotor and an inner surface area of the stator, wherein
(e) at least two delivery cells, which exhibit a first maximum cell volume form a first delivery cell group and
(f) at least two other delivery cells, which exhibit a second maximum cell volume form a second delivery cell group,
wherein
(g) the first maximum cell volume of the delivery cells of the first delivery cell group is larger than the second maximum cell volume of the delivery cells of the second delivery cell group, and
(h) wherein the delivery elements which limit a delivery cell of the first delivery cell group are each arranged at a first angular distance from each other on the rotor, and the delivery elements which limit a delivery cell of the second delivery cell group are each arranged at a second angular distance from each other on the rotor, wherein the first angular distance is larger than the second angular distance.