Method of determining the center of loading of a rolling element
AssigneeAktiebolaget Skf
InventorsAlireza Azarfar, Andreas Clemens van der Ham, Dominik Fritz, Stefan Engbers, Juergen Reichert, Defeng Lang
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Abstract
A method of determining the center of loading of a rolling element includes providing a rolling element body and at least three load sensors. The sensors are each positioned within a bore of the rolling element body at a separate distance from a reference position. Load measurements are taken with each one of the sensors at various positions about the circumference of the bearing and the center of loading is calculated at each one of the positions to determine the variation in axial loading about the bearing circumference.
Claims19
A method of determining the center of loading of a rolling element, the rolling element being disposed between and rotatably coupling a bearing inner race and a bearing outer race, the method comprising the steps of:
- providing a rolling element body and at least two load sensors;
- forming a cavity within the rolling element body such that an axis extends through the cavity;
- positioning a first one of the two load sensors within the cavity at a first distance (D1) along the axis from a reference axial position and positioning a second one of the two load sensors within the cavity at a second distance (D2) along the axis from the reference axial position, the second distance (D2) having a value different than a value of the first distance (D1);
- disposing the rolling element body between the first race and the second race;
- taking a first load measurement (L1) using the first sensor and a second load measurement (L2) using the second sensor as the rolling element body traverses a circular path between the first race and the second race;
- and
- calculating a center of loading on the rolling element body using the following equation:
- center
-
- of
-
- loading
- =
- L
-
- 1
- *
- D
-
- 1
- +
- L
-
- 2
- *
- D
-
- 2
- L
-
- 1
- +
- L
-
- 2
A method of determining the center of loading of a rolling element, the rolling element being disposed between and rotatably coupling a bearing inner race and a bearing outer race, the method comprising the steps of:
- providing a rolling element body, the rolling element body having two opposing axial ends, a bore extending between the two axial ends and a central axis extending through the bore, and a number (n) of load sensors;
- positioning each one of the number (n) of load sensors within the bore at a separate distance (Dn) along the axis from a reference axial position, the value of each distance (Dn) being different than the value of each other distance (Dn);
- disposing the rolling element body between the first race and the second race;
- taking a load measurement (Ln) using each one of the number (n) of the sensors;
- and
- calculating a center of loading on the rolling element body using the following equation:
- center
-
- of
-
- loading
- =
- L
-
- 1
- ⋆
- D
-
- 1
- +
- L
-
- 2
- ⋆
- D
-
- 2
- +
- L
-
- 3
- ⋆
- D
-
- 3
-
- …
- +
- Ln
- ⋆
- Dn
- L
-
- 1
- +
- L
-
- 2
- +
- L
-
- 3
-
- …
- +
- Ln
A sensorized roller for a bearing having an inner race and an outer race, the sensorized roller comprising:
- a body disposeable between the inner race and the outer race and having two opposing axial ends, a bore extending between the two axial ends, and a central axis extending through the bore;
- a first load sensor disposed within the bore so as to be located at a first distance (D1) along the axis from a reference axial position and a second load sensor disposed within the bore so as to be located at a second distance (D2) along the axis from the reference axial position, the second distance (D2) having a value different than a value of the first distance (D1);
- and
- a processor disposed within bore of the rolling element body and electrically connected with each one of the first load sensor and the second load sensor, the processor being configured to calculate an axial position of the center of loading on the rolling element body from measurements received from each one of the first load sensor and the second load sensor.
Dependencies are inferred from the claim text.