US 11,719,258 B2
Pump
Brian Lundsted Poulsen, Langå (DK); and Nielas Winther Laue, Aalborg (DK)
Assigned to GRUNDFOS HOLDING A/S, Bjerringbro (DK)
Appl. No. 17/255,042
Filed by GRUNDFOS HOLDING A/S, Bjerringbro (DK)
PCT Filed Jun. 19, 2019, PCT No. PCT/EP2019/066206
§ 371(c)(1), (2) Date Dec. 22, 2020,
PCT Pub. No. WO2020/002093, PCT Pub. Date Jan. 2, 2020.
Claims priority of application No. 18180917 (EP), filed on Jun. 29, 2018.
Prior Publication US 2021/0180613 A1, Jun. 17, 2021
Int. Cl. F16C 35/06 (2006.01); F04D 29/62 (2006.01); F04D 1/06 (2006.01); F04D 29/041 (2006.01)
CPC F04D 29/628 (2013.01) [F04D 1/063 (2013.01); F04D 29/0413 (2013.01); F05B 2240/52 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A pump comprising:
a rotor shaft extending along a rotor axis;
a bearing body circumferentially encompassing the rotor shaft and comprising a radially outer bearing surface; and
a locking ring circumferentially encompassing the rotor shaft and limiting an axial movement of the bearing body relative to the rotor shaft, wherein the locking ring comprises at least two radially inwardly protruding teeth, wherein the locking ring is radially expandable from a locking state to a mounting state against an elastic restoring force of the locking ring, wherein the locking ring is, in the mounting state, positionable at a desired axial position on the rotor shaft, wherein the teeth are configured to press, in the locking state, against a radial outer surface of the rotor shaft by the elastic restoring force of the locking ring, wherein the pump is a single stage or multistage centrifugal pump for pumping a fluid, wherein the fluid to be pumped serves as a lubricant on the radially outer bearing surface of the bearing body.