Bearing apparatus
AssigneeNtn Corporation
InventorShohei Hashizume
Life of this patent
Estimating the term…
Abstract
A bearing apparatus includes a bearing that rotatably supports a main spindle around a rotation axis, a spacer including an inner-ring spacer adjacent to an inner ring of the bearing and an outer-ring spacer adjacent to an outer ring, and a heat flux sensor provided in an inside surface of the outer-ring spacer. A distance in a direction along the rotation axis from a center of the bearing to a center of the heat flux sensor is longer than 0.5 time and shorter than one time of a dimension of the bearing in the direction along the rotation axis.
Claims8
A bearing apparatus comprising:
- a bearing including an inner ring, an outer ring, a rolling element, and a retainer, the bearing rotatably supporting a rotating body around a rotation axis;
- a spacer including an inner-ring spacer adjacent to the inner ring and an outer-ring spacer adjacent to the outer ring;
- and
- a heat flux sensor provided in one of the spacer and a component around the bearing, wherein
- a distance in a direction along the rotation axis from a center of the bearing to a center of the heat flux sensor is longer than 0.5 time and shorter than one time of a dimension of the bearing in the direction along the rotation axis.
A bearing apparatus comprising:
- a bearing including an inner ring, an outer ring, a rolling element, and a retainer, the bearing rotatably supporting a rotating body around a rotation axis;
- a spacer including an inner-ring spacer adjacent to the inner ring and an outer-ring spacer adjacent to the outer ring;
- and
- a heat flux sensor provided in one of the spacer and a component around the bearing, wherein
- a distance in a radial direction of the rotation axis from an outside surface of the inner-ring spacer to the heat flux sensor is equal to or shorter than 25% of a distance between an inside surface of the inner-ring spacer and an outside surface of the outer-ring spacer.
A bearing apparatus comprising:
- a bearing including an inner ring, an outer ring, a rolling element, and a retainer, the bearing rotatably supporting a rotating body around a rotation axis;
- a spacer including an inner-ring spacer adjacent to the inner ring and an outer-ring spacer adjacent to the outer ring;
- and
- a heat flux sensor provided in one of the spacer and a component around the bearing, wherein
- the heat flux sensor is provided in an inside surface of the outer-ring spacer,
- the outer-ring spacer is provided with an exhaust port for exhaust of air-oil for lubrication, and
- a magnitude of an angle in a circumferential direction of the rotation axis from a center of the exhaust port to a center of the heat flux sensor is smaller than 90°.
Dependencies are inferred from the claim text.