Thrust foil bearing
AssigneeIHI Corporation
InventorNaomichi Omori
Life of this patent
Estimating the term…
Abstract
A thrust foil bearing of the present disclosure includes a base plate which includes an insertion hole through which a rotation shaft is inserted, a back foil which is disposed around the insertion hole and supported by the base plate, and a top foil which is supported by the back foil, wherein the top foil includes an expansion portion in which a width of the expansion portion in a virtual straight line direction in which a virtual straight line extends decreases in a direction orthogonal to the virtual straight line, the virtual straight line being supported by the back foil on a most downstream side in a rotation direction of the shaft.
Claims7
A thrust foil bearing comprising:
- a base plate which includes an insertion hole through which a shaft is inserted;
- a back foil which is disposed around the insertion hole and supported by the base plate, the back foil being formed by adjacent mountain portions;
- and
- a top foil which is supported by the back foil,
- wherein
- the top foil includes an expansion portion in which a width of the expansion portion in a contact line direction in which a contact line extends decreases in a direction orthogonal to the contact line, the contact line being a line in which one mountain portion of the mountain portions of the back foil on a most downstream side in a rotation direction of the shaft is in contact with the top foil,
- the expansion portion includes a single peak on a downstream side in the rotation direction, and
- the top foil is provided with no other expansion portions including peaks on the downstream side in the rotation direction.
A thrust foil bearing comprising:
- a base plate which includes an insertion hole through which a shaft is inserted;
- a back foil which is disposed around the insertion hole and supported by the base plate, the back foil being formed by adjacent mountain portions;
- and
- a top foil which is supported by the back foil,
- wherein
- the top foil includes an expansion portion in which a width of the expansion portion in a contact line direction in which a contact line extends decreases in a direction orthogonal to the contact line, the contact line being a line in which one mountain portion of the mountain portions of the back foil on a most downstream side in a rotation direction of the shaft is in contact with the top foil, and
- the expansion portion is provided with a through-hole.
Dependencies are inferred from the claim text.