US 12,110,901 B2
Pump bearing retainer
Gunnar Gaba, Bjerringbro (DK)
Assigned to GRUNDFOS HOLDING A/S, Bjerringbro (DK)
Filed by GRUNDFOS HOLDING A/S, Bjerringbro (DK)
Filed on Jan. 14, 2021, as Appl. No. 17/148,778.
Claims priority of application No. 20152543 (EP), filed on Jan. 17, 2020.
Prior Publication US 2021/0222699 A1, Jul. 22, 2021
Int. Cl. F04D 29/02 (2006.01); F04D 13/06 (2006.01); F04D 29/046 (2006.01); F04D 29/047 (2006.01); F04D 29/06 (2006.01); F04D 29/58 (2006.01); F04D 29/62 (2006.01); F16C 33/76 (2006.01); F16C 35/02 (2006.01)
CPC F04D 29/046 (2013.01) [F04D 13/0606 (2013.01); F04D 13/0633 (2013.01); F04D 13/0646 (2013.01); F04D 29/02 (2013.01); F04D 29/0465 (2013.01); F04D 29/0473 (2013.01); F04D 29/061 (2013.01); F04D 29/586 (2013.01); F04D 29/628 (2013.01); F16C 33/76 (2013.01); F16C 35/02 (2013.01); F16C 2360/44 (2013.01); F16C 2361/63 (2013.01); F16C 2361/65 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A pump bearing retainer for a wet-running pump with a rotor shaft, the pump bearing retainer comprising:
a radially inner section;
a radial bearing with an inner sliding surface configured to allow a lubrication film between the inner sliding surface and the rotor shaft of the pump, the radial bearing being fitted into the radially inner section; and
a radially outer section extending radially outward from the inner section, wherein:
the radially inner section defines at least one first axial fluid channel providing a first fluid flow path in a first axial flow direction;
the at least one first axial fluid channel is located at a first radial distance to a rotor axis;
the first radial distance is larger than the radius of the inner sliding surface;
the radially outer section defines at least one second axial fluid channel providing a fluid flow path in a second axial flow direction through the at least one second axial fluid channel;
the at least one second axial fluid channel is located at a second radial distance to the rotor axis;
the second radial distance is larger than the first radial distance;
the second axial flow direction is opposite to the first axial flow direction; and
the at least one second axial fluid channel is formed as an arc-shaped slot having an arc radius equal to the second radial distance.