US 11,953,007 B2
Rotary lobe pump with internal bearing
Paul Krampe, Essen (DE); and Henrik Ahrens, Essen (DE)
Assigned to VOGELSANG GMBH & CO KG, Essen (DE)
Appl. No. 17/312,426
Filed by VOGELSANG GMBH & CO. KG, Essen (DE)
PCT Filed Dec. 13, 2019, PCT No. PCT/EP2019/085094
§ 371(c)(1), (2) Date Jun. 10, 2021,
PCT Pub. No. WO2020/120746, PCT Pub. Date Jun. 18, 2020.
Claims priority of application No. 20 2018 107 141.6 (DE), filed on Dec. 13, 2018.
Prior Publication US 2022/0025883 A1, Jan. 27, 2022
Int. Cl. F04C 2/12 (2006.01); F04C 2/08 (2006.01); F04C 15/00 (2006.01)
CPC F04C 2/126 (2013.01) [F04C 2/084 (2013.01); F04C 15/0038 (2013.01); F04C 15/0061 (2013.01); F04C 15/008 (2013.01); F04C 2240/20 (2013.01); F04C 2240/50 (2013.01); F04C 2240/52 (2013.01); F04C 2240/805 (2013.01); F05B 2240/50 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A rotary lobe pump for conveying a particle-laden conveyed liquid, comprising:
a pump housing with a pump room;
an inlet opening and an outlet opening;
a first, multi-lobe rotary piston, which is arranged in the pump room and is rotatably mounted about a first axis of rotation;
a second multi-lobe rotary piston, which is arranged in the pump room, and is rotatably mounted about a second axis of rotation spaced apart from the first axis of rotation and meshingly engages in the first rotary piston;
wherein the first and the second rotary pistons are drivable in opposite directions and are designed to generate a flow of the conveyed liquid from the inlet opening through the pump room to the outlet opening by counter-rotation about the first and second axis of rotation, respectively;
a drive device arranged on one side of the pump housing, which is mechanically coupled to at least one of the first or second rotary pistons for driving the at least one of the first or second rotary pistons;
a first fixed axle body, which is arranged inside the first rotary piston and connected to the pump housing on the side of the drive device; and
at least one first bearing for rotably supporting the first rotary piston about the first fixed axle body, wherein the bearing is arranged on an outer surface of the first fixed axle body and inside the first rotary piston;
wherein the drive device comprises a first drive unit and a second drive unit; and
wherein the first rotary piston is directly coupled to the first drive unit and the second rotary piston is directly coupled to the second drive unit.