US 12,071,949 B2
Screw compressor having rotors mounted on one side
Ulrich Thomes, Kulz (DE)
Assigned to Gardner Denver Deutschland GMBH, Bad Neustadt (DE)
Appl. No. 17/799,125
Filed by GARDNER DENVER DEUTSCHLAND GMBH, Bad Neustadt (DE)
PCT Filed Feb. 10, 2021, PCT No. PCT/EP2021/053220
§ 371(c)(1), (2) Date Aug. 11, 2022,
PCT Pub. No. WO2021/160677, PCT Pub. Date Aug. 19, 2021.
Claims priority of application No. 102020103384.2 (DE), filed on Feb. 11, 2020.
Prior Publication US 2023/0071320 A1, Mar. 9, 2023
Int. Cl. F04C 18/16 (2006.01); F04C 2/16 (2006.01); F04C 23/00 (2006.01); F04C 29/04 (2006.01)
CPC F04C 18/16 (2013.01) [F04C 2/16 (2013.01); F04C 23/001 (2013.01); F04C 29/04 (2013.01); F04C 2240/51 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A screw compressor assembly for compressing a fluid medium comprising:
a drive unit configured to drive a first shaft and a second shaft, the first shaft defining a first axis of rotation and the second shaft defining a second axis of rotation, the first axis of rotation parallel to the second axis of rotation, the first shaft having a first end and a second end, the first end configured to be directly driven by the drive unit;
a compressor unit including a compressor housing, a main rotor and a subsidiary rotor, the main rotor and the subsidiary rotor having mutually engaging screw profiles and positioned parallel from each other, the first shaft rotatably driving the main rotor around the first axis of rotation and the second shaft rotatably driving the subsidiary rotor around the second axis of rotation; and
a bearing unit disposed between the drive unit and the compressor unit, the bearing unit housing the first shaft and the second shaft and including a pair of gearwheels, each one of the pair of gearwheels respectively coupled to the first shaft and the second shaft and configured to synchronously drive the second shaft with respect to the first shaft;
wherein the main rotor and the subsidiary rotor are respectively mounted to the first shaft and the second shaft on a first axial direction, the first axial direction facing the drive unit.