Method for manufacturing seal ring, method for assembling turbine, and turbine
AssigneeMitsubishi Heavy Industries, Ltd.
InventorsShohei Danno, Hideaki Sato
Life of this patent
Estimating the term…
Abstract
A method for manufacturing a seal ring according to at least one embodiment is a method for manufacturing a circular seal ring, including: a step of forming a seal fin by turning an inner peripheral portion of a first member and a second member each having a semi-circular shape in a state where both end portions of each of the first member and the second member are in contact with each other; and a step of turning an outer peripheral portion of the first member and the second member in a state where the both end portions of each of the first member and the second member are spaced apart from each other.
Claims11
A method for manufacturing a circular seal ring, comprising:
- a step of forming a seal fin by turning an inner peripheral portion of a first member and a second member each having a semi-circular shape in a state where both end portions of each of the first member and the second member are in contact with each other;
- and
- a step of turning an outer peripheral portion of the first member and the second member in a state where the both end portions of each of the first member and the second member are spaced apart from each other.
A turbine, comprising:
- a blade ring upper half portion;
- a blade ring lower half portion;
- and
- a circular seal ring,
- wherein the seal ring includes:
- a first member attached to the blade ring upper half portion, having a semi-circular shape extending over half the circumference of the seal ring, and formed with a seal fin in an inner peripheral portion;
- and
- a second member attached to the blade ring lower half portion, having a semi-circular shape extending over half the circumference of the seal ring, and formed with the seal fin in the inner peripheral portion,
- wherein the first member and the second member are attached to the blade ring upper half portion and the blade ring lower half portion in a state where both end portions of each of the first member and the second member are spaced apart from each other,
- wherein a virtual circle defined by tip portions of the seal fins is configured such that a major axis thereof extends in a vertical direction and a minor axis thereof extends in a horizontal direction when viewed in an axial direction of the turbine, and
- wherein a space between end portions on one side of the both end portions of each of the first member and the second member is the same as a space between end portions on another side.
Dependencies are inferred from the claim text.