TURBINE VIBRATION REDUCTION SYSTEM
A turbine vibration reduction system includes a nozzle, a bucket in operable communication with the nozzle, and a structure having at least one opening configured to inject fluid into flow traveling past the nozzle and the bucket to disrupt formation of a vortex.
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The subject matter disclosed herein relates generally to turbines and more particularly to systems for reduction of vibration thereof
BRIEF DESCRIPTION OF THE INVENTIONAccording to one aspect of the invention, a turbine vibration reduction system includes a nozzle, a bucket in operable communication with the nozzle, and a structure having at least one opening configured to inject fluid into flow traveling past the nozzle and the bucket to disrupt formation of a vortex.
According to another aspect of the invention, a turbine vibration reduction system includes, a nozzle, a last stage bucket in operable communication with the nozzle and a casing surrounding the last stage bucket having an opening therein located downstream of the last stage bucket that is configured to inject fluid into flow having passed the last stage bucket to disrupt formation of a vortex in the fluid during operational conditions of the turbine conducive to vortex formation. These and other advantages and features will become more apparent from the following description taken in conjunction with the drawings.
The subject matter, which is regarded as the invention, is particularly pointed out and distinctly claimed in the claims at the conclusion of the specification. The foregoing and other features, and advantages of the invention are apparent from the following detailed description taken in conjunction with the accompanying drawings in which:
The detailed description explains embodiments of the invention, together with advantages and features, by way of example with reference to the drawings.
DETAILED DESCRIPTION OF THE INVENTIONReferring to
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It should be noted that although the embodiments illustrated in the Figures herein each have only one of the separate opening(s) 22, 122 and 222, alternate embodiments are contemplated that have a combination of one or more of the separate opening(s) 22, 122 and 222 within a single turbine vibration reduction system.
While the invention has been described in detail in connection with only a limited number of embodiments, it should be readily understood that the invention is not limited to such disclosed embodiments. Rather, the invention can be modified to incorporate any number of variations, alterations, substitutions or equivalent arrangements not heretofore described, but which are commensurate with the spirit and scope of the invention. Additionally, while various embodiments of the invention have been described, it is to be understood that aspects of the invention may include only some of the described embodiments. Accordingly, the invention is not to be seen as limited by the foregoing description, but is only limited by the scope of the appended claims.
Claims
1. A turbine vibration reduction system, comprising:
- a nozzle;
- a bucket in operable communication with the nozzle; and
- a structure near the bucket having at least one opening configured to inject fluid into flow traveling past the nozzle and the bucket to disrupt formation of a vortex.
2. The turbine vibration reduction system of claim 1, wherein the at least one opening is on a portion of the structure between the nozzle and the bucket.
3. The turbine vibration reduction system of claim 1, wherein the bucket is a last stage bucket.
4. The turbine vibration reduction system of claim 1, wherein the structure is the nozzle.
5. The turbine vibration reduction system of claim 4, wherein the at least one opening is at a trailing edge of the nozzle.
6. The turbine vibration reduction system of claim 4, wherein the at least one opening is located on an inner radial half of the nozzle.
7. The turbine vibration reduction system of claim 4, wherein the at least one opening is a hole with diameter about 0.15 inches.
8. The turbine vibration reduction system of claim 4, wherein the at least one opening is a plurality of openings that are equally spaced on the nozzle.
9. The turbine vibration reduction system of claim 8 wherein the plurality of openings are oriented to inject steam in alignment with the flow.
10. The turbine vibration reduction system of claim 4, wherein the at least one opening is configured to inject about 10 pounds per second of steam at about 1.0 pounds per square inch.
11. The turbine vibration reduction system of claim 1, wherein the fluid is steam.
12. The turbine vibration reduction system of claim 1, wherein the structure is a hub.
13. The turbine vibration reduction system of claim 12, wherein the at least one opening is a slot.
14. The turbine vibration reduction system of claim 12, wherein the at least one opening is a plurality of openings distributed circumferentially around the hub.
15. The turbine vibration reduction system of claim 12, wherein the at least one opening is angled to inject steam at an angle of about 25-45 degrees relative to an axis of the hub.
16. The turbine vibration reduction system of claim 12, wherein the at least one opening is configured to inject about 3.0 pounds of steam at about 1.0 pounds per square inch.
17. The turbine vibration reduction system of claim 1, wherein the structure is a casing.
18. The turbine vibration reduction system of claim 17, wherein the at least one opening is located in a portion of the casing that is downstream of the bucket.
19. The turbine vibration reduction system of claim 18, wherein the at least one opening is a plurality of holes that are distributed circumferentially about the casing.
20. A turbine vibration reduction system comprising:
- a nozzle;
- a last stage bucket in operable communication with the nozzle; and
- a casing surrounding the last stage bucket having an opening therein located downstream of the last stage bucket being configured to inject fluid into flow having passed the last stage bucket to disrupt formation of a vortex in the fluid during operational conditions of the turbine conducive to vortex formation.
Type: Application
Filed: Apr 18, 2012
Publication Date: Oct 24, 2013
Applicant: GENERAL ELECTRIC COMPANY (Schenectady, NY)
Inventors: Asif Iqbal Ansari (Bangalore), Joshy John (Bangalore), Moorthi Subramaniyan (Bangalore), Lakshmanan Valliappan (Bangalore)
Application Number: 13/450,170
International Classification: F04D 29/40 (20060101);