US 11,719,242 B2
Axial pressure relief in slide bearings of pumps
Claus Welte, Aulendorf (DE); and Uwe Meinig, Bad Saulgau (DE)
Assigned to Schwäbische Hüttenwerke Automotive GmbH, Aalen (DE)
Filed by Schwäbische Hüttenwerke Automotive GmbH, Aalen-Wasseralfingen (DE)
Filed on Jun. 23, 2021, as Appl. No. 17/355,553.
Claims priority of application No. 10 2020 116 822.5 (DE), filed on Jun. 25, 2020.
Prior Publication US 2021/0404470 A1, Dec. 30, 2021
Int. Cl. F04C 29/00 (2006.01); F04C 2/344 (2006.01); F04C 27/00 (2006.01)
CPC F04C 29/0028 (2013.01) [F04C 2/344 (2013.01); F04C 27/009 (2013.01); F04C 29/0035 (2013.01); F04C 2240/30 (2013.01); F04C 2240/50 (2013.01); F04C 2240/56 (2013.01); F04C 2240/60 (2013.01); F04C 2240/603 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A pump comprising a pump insert adapted to be inserted into an accommodating housing, the pump insert comprising:
a drive shaft comprising a rotor;
a first housing part and a second housing part, between which a pump chamber is formed, in which the rotor is arranged; and
a rotary bearing via which the drive shaft is mounted on the first housing part such that it can rotate about its rotational axis;
wherein the drive shaft comprises a passage, a first opening forming a first end of the passage, and a second opening forming a second end of the passage,
wherein the rotary bearing is arranged between the pump chamber and the first opening, and the second opening of the passage opens onto the side of the second housing part which faces away from the pump chamber, and
wherein the second housing part comprises a fastening flange adapted to fasten the second housing part to the accommodating housing;
the pump insert further comprising a hollow space which is formed between a base of a blind hole formed by the first housing part and a first end of a drive shaft which is arranged in the first housing part, wherein the first opening of the passage emerges into the hollow space.