Patent Application
20150016959
This invention relates generally to turbines and more particularly to a seal platform for a turbine.
In a steam or gas turbine, seals may be attached to a rotor or a casing. A seal on the rotor provides a seal between the rotor and the nozzles. A seal on the casing provides a seal between the casing and the buckets. A variety of seals, for example, seal teeth or seal brushes, are well known in the art. The relative ease or difficulty in assembling a turbine, disassembling a turbine, and packing (the overall configuration of parts) a turbine are all considerations in turbine and turbine component design.
A first aspect of the invention provides a partial seal platform for mounting a seal and securing the seal to one of a rotor or a casing, comprising: a first arcuate securing segment including a first securing notch for receiving a first securing ridge of the rotor or the casing; a second arcuate securing segment including a second securing notch for receiving a second securing ridge of the rotor or the casing; an arcuate coupling segment including a first flat ridge forming a first and second lateral notch on each side of the first flat ridge for receiving the first arcuate securing segment and the second arcuate securing segment, wherein the first securing notch and the second securing notch open away from each other, and wherein the arcuate coupling segment has at least one passage in the first flat ridge for receiving a part of a coupling bolt; an arcuate mounting segment including a second flat ridge forming a lateral notch on each side of the second flat ridge for receiving the first arcuate securing segment and the second arcuate securing segment, wherein the arcuate mounting segment has at least one passage in the second flat ridge for receiving a part of the coupling bolt, and wherein the second flat ridge aligns with the first flat ridge.
A second aspect of the invention provides a seal platform for mounting a seal and securing the seal to one of a rotor or a casing, comprising: at least two first arcuate securing segments each first arcuate securing segment including a first securing notch for receiving a first securing ridge of the rotor or the casing, wherein the at least two first arcuate securing segments are aligned end-to-end to form a first securing ring; at least two second arcuate securing segments each second arcuate securing segment including a second securing notch for receiving a second securing ridge of the rotor or the casing, wherein the at least two second arcuate securing segments are aligned end-to-end to form a second securing ring; at least two arcuate coupling segments each arcuate coupling segment including a first flat ridge forming a first and second lateral notch on each side of the first flat ridge for receiving one of the first arcuate securing segments and one of the second arcuate securing segments, wherein the first securing notch and the second securing notch open away from each other, wherein each arcuate coupling segment has at least one passage in the first flat ridge for receiving a part of a coupling bolt, and wherein the at least two arcuate coupling segments are aligned end-to-end to form a coupling ring; at least two arcuate mounting segments each arcuate mounting segment including a second flat ridge forming a lateral notch on each side of the second flat ridge for receiving one of the first arcuate securing segments and one of the second arcuate securing segments, wherein each arcuate mounting segment has at least one passage in the second flat ridge for receiving a part of the coupling bolt, and wherein the second flat ridge aligns with the first flat ridge, and wherein the at least two arcuate mounting segments are aligned end-to-end to form a mounting ring.
A third aspect of the invention provides a rotor or a casing of a turbine, comprising: at least one seal platform for a nozzle or a bucket including: at least two first arcuate securing segments each first arcuate securing segment including a first securing notch for receiving a first securing ridge of the rotor or the casing, wherein the at least two first arcuate securing segments are aligned end-to-end to form a first securing ring; at least two second arcuate securing segments each second arcuate securing segment including a second securing notch for receiving a second securing ridge of the rotor or the casing, wherein the at least two second arcuate securing segments are aligned end-to-end to form a second securing ring; at least two arcuate coupling segments each arcuate coupling segment including a first flat ridge forming a first and second lateral notch on each side of the first flat ridge for receiving one of the first arcuate securing segments and one of the second arcuate securing segments, wherein the first securing notch and the second securing notch open away from each other, wherein each arcuate coupling segment has at least one passage in the first flat ridge for receiving a part of a coupling bolt, and wherein the at least two arcuate coupling segments are aligned end-to-end to form a coupling ring; at least two arcuate mounting segments each arcuate mounting segment including a second flat ridge forming a lateral notch on each side of the second flat ridge for receiving one of the first arcuate securing segments and one of the second arcuate securing segments, wherein each arcuate mounting segment has at least one passage in the second flat ridge for receiving a part of the coupling bolt, and wherein the second flat ridge aligns with the first flat ridge, and wherein the at least two arcuate mounting segments are aligned end-to-end to form a mounting ring.
These and other aspects, advantages and salient features of the invention will become apparent from the following detailed description, which, when taken in conjunction with the annexed drawings, where like parts are designated by like reference characters throughout the drawings, disclose embodiments of the invention.
The above and other aspects, features and advantages of the invention will be better understood by reading the following more particular description of the invention in conjunction with the accompanying drawings.
The drawings are not necessarily to scale. The drawings are merely schematic representations, not intended to portray specific parameters of the invention. The drawings are intended to depict only typical embodiments of the invention, and therefore should not be considered as limiting the scope of the invention. In the drawings, like numbering represents like elements.
Referring to the drawings,
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The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used herein, the singular forms “a”, “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms “comprises” and/or “comprising,” when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof
While various embodiments are described herein, it will be appreciated from the specification that various combinations of elements, variations or improvements therein may be made by those skilled in the art, and are within the scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from essential scope thereof Therefore, it is intended that the invention not be limited to the particular embodiment disclosed as the best mode contemplated for carrying out this invention, but that the invention will include all embodiments falling within the scope of the appended claims.
