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US 11,709,106 B2Granted
Roller bearing, wind turbine and method for controlling same
AssigneesAktiebolaget Skf, SKF (China) Co Ltd
InventorsMingchun Guo, Quan Xu, Robert Zeillinger, Lichao Zhang
Life of this patent
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Abstract
A roller bearing includes an outer ring, an inner ring, at least one row of rollers arranged between the outer ring and the inner ring, and at least one optical fiber cable mounted to the outer ring or the inner ring, the optical fiber cable including at least one Bragg grating. The optical fiber cable is configured such that a signal in the optical fiber cable is usable to determine a preload or load on the roller bearing.
Claims18
A roller bearing comprising:
- an outer ring,
- an inner ring,
- at least one row of rollers arranged between the outer ring and the inner ring,
- and at least one optical fiber cable mounted to the outer ring or the inner ring, the optical fiber cable comprising at least one Bragg grating,
- wherein the optical fiber cable is configured such that a signal in the optical fiber cable is usable to determine a preload or load on the roller bearing,
- wherein the at least one row of rollers comprises a first row of rollers and a second row of rollers axially spaced from the first row of rollers,
- wherein the outer ring includes a first circumferential groove directly radially outward of the first row of rollers and a second circumferential groove axially spaced from the first circumferential groove and directly radially outward of the second row of rollers,
- wherein the at least one optical fiber cable comprises a first optical fiber cable in the first circumferential groove and a second optical fiber cable in the second circumferential groove, and
- wherein a base of the first circumferential groove has a base width greater than an opening width of the first circumferential groove.
6 more elements
A roller bearing comprising:
- an outer ring,
- an inner ring,
- at least one row of rollers arranged between the outer ring and the inner ring,
- and at least one optical fiber cable mounted to the outer ring or the inner ring, the optical fiber cable comprising at least one Bragg grating,
- wherein the optical fiber cable is configured such that a signal in the optical fiber cable is usable to determine a preload or load on the roller bearing,
- wherein an outer periphery of the outer ring corresponding to a loaded zone of each row of the at least one row of rollers is provided with a groove, the groove having a cross section in the shape of an isosceles trapezoid, wherein the isosceles trapezoid forming the groove has an upper base located on a radially outer side of the outer ring, a lower base located on a radially inner side of the outer ring, and a base angle (α) greater than or equal to 70 degrees and less than or equal to 85 degrees, and
- wherein the optical fiber cable is located in the groove.
4 more elements
Dependencies are inferred from the claim text.