US1060945A - Preventing erosion in steam-turbines. - Google Patents

Preventing erosion in steam-turbines. Download PDF

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Publication number
US1060945A
US1060945A US71909712A US1912719097A US1060945A US 1060945 A US1060945 A US 1060945A US 71909712 A US71909712 A US 71909712A US 1912719097 A US1912719097 A US 1912719097A US 1060945 A US1060945 A US 1060945A
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Prior art keywords
water
steam
turbines
buckets
base
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Expired - Lifetime
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US71909712A
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Richard H Rice
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General Electric Co
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General Electric Co
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D9/00—Stators
    • F01D9/02—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles
    • F01D9/04—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector
    • F01D9/042—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector fixing blades to stators

Definitions

  • This invention relates to elastic fluid turbines, and its object is to prevent the injury caused by erosion adjacent to the intermediate buckets.
  • the steam passing through the turbine carries more or less water, and this is: thrown by centrifugal force from the ends of the rotating buckets.
  • the water impinges upon the wall of the casing and makes its way into the joints between the shanks of the intermediate buckets and their socketsV inv said wall.
  • the velocity of the particles of water causes rapid erosion of the parts against which it strikes, while the acids in the water tend to corrode said parts and rust the intermediates in their sockets, so that it becomes diiiicult to remove them.
  • My invent-ion aims to avoid these troubles by providing the intermediates with a wide base to cover the joint and by giving the sides of said base an easy concave curve, so that the water will be diverted away from the joint. Moreover I make this base of a material resistant At0 the corrosive and erosive action of the water, such as nickel bronze or monel metal.
  • Figure l is a sectional view of a portion of a turbine casing and a bucket wheel, and an interj mediate embodying my invention, and Fig.
  • the bucket wheel l is shown provided with two rows of buckets 2 between which are the intermediate buckets 3 mounted on the casing 4f.
  • the intermediates have a widev base d5' made of extruded metalg nickel bronze, monel metal, or the lik-e, extending far enough on each side to catch all the water thrown 'oft' b f the wheel buckets 2.
  • the base also exten s well beyond the rab- Specicaton of Letters Patent.
  • the sides of the base are formed with a concave curve 8 of considerabie radius, so that the water will be diverted easily and gradually away from the joint and into a' direction substantially parallel with the Walls of the casing.
  • An intermediate bucket for a steam turbine having a base provided with curved sides to divert the water coming from the wheel buckets.
  • An intermediate bucket for a steam turbine having a base wide enough lto receive the water coming from two adjacent rows of wheel buckets, and concavely curved to divert said water.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Hydraulic Turbines (AREA)

Description

`oNrrEn sTArEs PATENT oEEioE.
' RICHARD H. RICE, OF LYNN, MASSACHUSETTS, ASSIGNOR T0 GENERAL ELECTRIC COMPANY, A CORPORATION OF NEW YORK..
PREVENTING- EROSION IN STEAM-TURBINES.
To all whom t may concern:
Be it known that I, RioHARD H. Riou, a citizen of the` United States, residing at Lynn, county of Essex, State of Massachusetts, have inventedcertain new and useful Improvements in Preventing Erosion in Steam-Turbines, of which the following is a specification.
This invention relates to elastic fluid turbines, and its object is to prevent the injury caused by erosion adjacent to the intermediate buckets. The steam passing through the turbine carries more or less water, and this is: thrown by centrifugal force from the ends of the rotating buckets. The water impinges upon the wall of the casing and makes its way into the joints between the shanks of the intermediate buckets and their socketsV inv said wall. The velocity of the particles of water causes rapid erosion of the parts against which it strikes, while the acids in the water tend to corrode said parts and rust the intermediates in their sockets, so that it becomes diiiicult to remove them. My invent-ion aims to avoid these troubles by providing the intermediates with a wide base to cover the joint and by giving the sides of said base an easy concave curve, so that the water will be diverted away from the joint. Moreover I make this base of a material resistant At0 the corrosive and erosive action of the water, such as nickel bronze or monel metal.
In the accompanying drawings, Figure l is a sectional view of a portion of a turbine casing and a bucket wheel, and an interj mediate embodying my invention, and Fig.
2 is a section at right anglesI to Fig. l, on a smaller scale. f
The bucket wheel l is shown provided with two rows of buckets 2 between which are the intermediate buckets 3 mounted on the casing 4f. The intermediates have a widev base d5' made of extruded metalg nickel bronze, monel metal, or the lik-e, extending far enough on each side to catch all the water thrown 'oft' b f the wheel buckets 2. The base also exten s well beyond the rab- Specicaton of Letters Patent.
Application led September 7, 1912. Serial No. 719,097.
' Patenteaiuay envie.
beted joint 6 by which it is united to the casing 4, being fastened in place by screws 7. To prevent sudden impact of the water particles, and lessen the erosive effect, the sides of the base are formed with a concave curve 8 of considerabie radius, so that the water will be diverted easily and gradually away from the joint and into a' direction substantially parallel with the Walls of the casing.
In accordance with the provisions of the patent statutes, I have described the principle of operation of my invention, together with the apparatus which I now consider to represent the best'embcdimen't thereof, but I desire to have it understood that the apparatus shown is only illustrative, and that the invention can be carried out by other means.
What I claim as new and d esire to secure by Letters Patent of the United States, is,-
l. An intermediate bucket for a steam turbine having a base provided with curved sides to divert the water coming from the wheel buckets.
2. An intermediate bucket for a steam turbine having a base wide enough lto receive the water coming from two adjacent rows of wheel buckets, and concavely curved to divert said water.
3. In a steam turbine, intermediate buckets united to the casing by a rabbeted joint and having a wide base to protect said joint from the erosive and corrosive effects of water thrown oif by the wheel buckets.
4. In a steam turbine, intermedia-te buck! ets united to the casing by a rabbeted joint and having a wide base to protect said joint from the erosive and corrosive eifects of water thrown off by the wheel buckets, said basehaving its sides concavely curved to di# vert said water. i j In witness'whereof, I have hereunto set my hand thisiifth day of September, 1912. f
. RICHARD H. RICE.
Writnesses f
US71909712A 1912-09-07 1912-09-07 Preventing erosion in steam-turbines. Expired - Lifetime US1060945A (en)

Priority Applications (1)

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US71909712A US1060945A (en) 1912-09-07 1912-09-07 Preventing erosion in steam-turbines.

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US71909712A US1060945A (en) 1912-09-07 1912-09-07 Preventing erosion in steam-turbines.

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4650396A (en) * 1984-01-09 1987-03-17 Bbc Brown, Boveri & Company, Limited Externally adjustable axial location for a vane carrier in a turbine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4650396A (en) * 1984-01-09 1987-03-17 Bbc Brown, Boveri & Company, Limited Externally adjustable axial location for a vane carrier in a turbine

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