US 11,703,183 B2
System for lubricating a sealed bearing and associated method
Eric Choquet, Guilion (FR); and Eric Robba, Domecy sur Cure (FR)
Assigned to Aktiebolaget SKF, Gothenburg (SE)
Filed by Aktiebolaget SKF, Gothenburg (SE)
Filed on Jul. 19, 2021, as Appl. No. 17/379,211.
Claims priority of application No. 102020211264.9 (DE), filed on Sep. 8, 2020.
Prior Publication US 2022/0074451 A1, Mar. 10, 2022
Int. Cl. F16N 31/00 (2006.01); F16N 29/02 (2006.01); F16N 13/00 (2006.01); F16N 7/40 (2006.01)
CPC F16N 31/00 (2013.01) [F16N 7/40 (2013.01); F16N 13/00 (2013.01); F16N 29/02 (2013.01); F16N 2210/14 (2013.01); F16N 2250/04 (2013.01); F16N 2270/60 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for lubricating a sealed bearing comprising:
providing a first ring and a second ring capable of rotating concentrically relative to one another, and seals delimiting together with the first and second rings a sealed chamber, a pressure inside the sealed chamber being within a predetermined interval between a first lower pressure value and a second higher pressure value, the seals being configured such that while the pressure remains within the predetermined interval, the sealed chamber remains resistant to leaks,
establishing fluid communication between the sealed chamber and a pump and removing up to a first predetermined quantity of lubricant from the sealed chamber provided that the pressure in the sealed chamber does not go below a first lower pressure value, and
injecting up to a second predetermined quantity of lubricant in the sealed chamber provided that the pressure in the sealed chamber does not exceed a second higher pressure value, wherein lubricant is removed from or injected in the sealed chamber via a device including the pump which is configured to suck lubricant from the sealed chamber, wherein the device comprises a pressure sensor configured to measure the pressure in the sealed chamber and a controller configured to activate the pump provided the measured pressure is within the predetermined interval.