US 12,313,117 B2
Bearing device, and associated machine and method
Benoit Louette, Saint Genough (FR)
Assigned to Aktiebolaget SKF, Gothenburg (SE)
Filed by Aktiebolaget SKF, Gothenburg (SE)
Filed on Aug. 30, 2023, as Appl. No. 18/458,305.
Claims priority of application No. 102022209407.7 (DE), filed on Sep. 9, 2022.
Prior Publication US 2024/0093734 A1, Mar. 21, 2024
Int. Cl. F16C 19/52 (2006.01); F16C 19/06 (2006.01); G01M 13/045 (2019.01)
CPC F16C 19/527 (2013.01) [F16C 19/06 (2013.01); G01M 13/045 (2013.01); F16C 2233/00 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A method for monitoring a bearing device in a machine, the bearing device comprising a bearing provided with an inner ring and with an outer ring capable of rotating concentrically relative to one another, and a vibration sensor measuring vibrations of the bearing, the method comprising the following steps:
a. determining values of at least a first statistical parameter and a second statistical parameter from at least one set of vibration measurements delivered by the sensor during a training period following the implementation of the sensor in the machine and when the rotation speed of one of the inner and outer rings relative to the other is included in a predetermined interval,
b. modelling the values of the first statistical parameter with a first normal distribution and modelling the values of the second statistical parameter with a second normal distribution during the training period,
c. determining a detection threshold from the first and second normal distributions during the training period,
d. determining a first value of the first statistical parameter and a second value of the second statistical parameter from a set of vibration measurements delivered by the sensor during normal operation of the machine and when the rotation speed of the said one ring is included the predetermined interval,
e. determining a score during normal operation of the machine from the values of the two statistical parameters, the first and second normal distributions,
f. comparing the score to the detection threshold, and
g. determining the failure of the bearing according to the result of the comparison.