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US 12,736,085 B2Granted
Bearing
AssigneeAktiebolaget Skf
InventorsYafen Chen, Hongyuan An
Life of this patent
Estimating the term…
Abstract
A bearing has an inner ring, an outer ring, rollers, and a cage. The inner ring has an inner raceway. The outer ring has an outer raceway. The rollers are located between the inner raceway and the outer raceway. The cage holds the rollers. A relative groove curvature Ri of the inner raceway satisfies Ri≥0.545, and/or a relative groove curvature Re of the outer raceway satisfies Re≥0.545. An inner diameter d of the bearing satisfies 24 mm≤d≤30 mm and a radial play Gr satisfies 13 μm≤Gr≤41 μm, or the inner diameter d of the bearing satisfies 6 mm≤d≤10 mm and the radial play Gr satisfies 8 μm≤Gr≤29 μm.
Claims20
A bearing comprising:
- an inner ring having an inner raceway, the inner raceway having a radius and a relative groove curvature (Ri), the inner raceway having a groove bottom having a diameter (Di);
- an outer ring having an outer raceway, the outer raceway having a radius and a relative groove curvature (Re), the outer raceway having a groove bottom having a diameter (de);
- rollers located between the inner raceway and the outer raceway, the rollers having a diameter (Dw);
- a cage for holding the rollers;
- an inner diameter (d);
- and
- a radial play (Gr), the radial play (Gr) is defined as Gr=de−Di−2×Dw;
- wherein the relative groove curvature (Ri) of the inner raceway is defined as the radius of the inner raceway divided by the diameter (Dw) of the rollers;
- wherein the relative groove curvature (Re) of the outer raceway is defined as the radius of the outer raceway divided by the diameter (Dw) of the rollers;
- wherein the relative groove curvature (Ri) of the inner raceway satisfies Ri≥0.545, and/or a relative groove curvature (Re) of the outer raceway satisfies Re≥0.545;
- and
- wherein the inner diameter (d) of the bearing satisfies 24 mm≤d≤30 mm and the radial play (Gr) satisfies 13 μm≤Gr≤41 μm, or the inner diameter (d) of the bearing satisfies 6 mm≤d≤10 mm and the radial play (Gr) satisfies 8 μm≤Gr≤29 μm.
9 more elements
A method of bearing operation, the method comprising:
- operating the bearing at a rotational speed of ≤14,000 rpm and at an operating temperature of ≤250° C.;
- wherein the bearing comprises:
- an inner ring having an inner raceway, the inner raceway having a radius and a relative groove curvature (Ri), the inner raceway having a groove bottom having a diameter (Di);
- an outer ring having an outer raceway, the outer raceway having a radius and a relative groove curvature (Re), the outer raceway having a groove bottom having a diameter (de);
- rollers located between the inner raceway and the outer raceway, the rollers having a diameter (Dw);
- a cage for holding the rollers;
- an inner diameter (d);
- and
- a radial play (Gr), the radial play (Gr) is defined as Gr=de−Di−2×Dw;
- wherein the relative groove curvature (Ri) of the inner raceway is defined as the radius of the inner raceway divided by the diameter (Dw) of the rollers;
- wherein the relative groove curvature (Re) of the outer raceway is defined as the radius of the outer raceway divided by the diameter (Dw) of the rollers;
- wherein the relative groove curvature (Ri) of the inner raceway satisfies Ri≥0.545, and/or a relative groove curvature (Re) of the outer raceway satisfies Re≥0.545;
- and
- wherein the inner diameter (d) of the bearing satisfies 24 mm≤d≤30 mm and the radial play (Gr) satisfies 13 μm≤Gr≤41 μm, or the inner diameter (d) of the bearing satisfies 6 mm≤d≤10 mm and the radial play (Gr) satisfies 8 μm≤Gr≤29 μm.
11 more elements
A method of bearing operation, the method comprising:
- operating the bearing at a rotational speed of ≤5 rpm and at an operating temperature range of 140±5° C.;
- wherein the bearing comprises:
- an inner ring having an inner raceway, the inner raceway having a radius and a relative groove curvature (Ri), the inner raceway having a groove bottom having a diameter (Di);
- an outer ring having an outer raceway, the outer raceway having a radius and a relative groove curvature (Re), the outer raceway having a groove bottom having a diameter (de);
- rollers located between the inner raceway and the outer raceway, the rollers having a diameter (Dw);
- a cage for holding the rollers;
- an inner diameter (d);
- and
- a radial play (Gr), the radial play (Gr) is defined as Gr=de−Di−2×Dw;
- wherein the relative groove curvature (Ri) of the inner raceway is defined as the radius of the inner raceway divided by the diameter (Dw) of the rollers;
- wherein the relative groove curvature (Re) of the outer raceway is defined as the radius of the outer raceway divided by the diameter (Dw) of the rollers;
- wherein the relative groove curvature (Ri) of the inner raceway satisfies Ri≥0.545, and/or a relative groove curvature (Re) of the outer raceway satisfies Re≥0.545;
- and
- wherein the inner diameter (d) of the bearing satisfies 24 mm≤d≤30 mm and the radial play (Gr) satisfies 13 μm≤Gr≤41 μm, or the inner diameter (d) of the bearing satisfies 6 mm≤d≤10 mm and the radial play (Gr) satisfies 8 μm≤Gr≤29 μm.
11 more elements
Dependencies are inferred from the claim text.