US1778066A - Elastic fluid turbine - Google Patents

Elastic fluid turbine Download PDF

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Publication number
US1778066A
US1778066A US358122A US35812229A US1778066A US 1778066 A US1778066 A US 1778066A US 358122 A US358122 A US 358122A US 35812229 A US35812229 A US 35812229A US 1778066 A US1778066 A US 1778066A
Authority
US
United States
Prior art keywords
bases
elastic fluid
bucket
fluid turbine
lugs
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US358122A
Other languages
English (en)
Inventor
John H Doran
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
General Electric Co
Original Assignee
General Electric Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by General Electric Co filed Critical General Electric Co
Priority to US358122A priority Critical patent/US1778066A/en
Priority to FR694357D priority patent/FR694357A/fr
Priority to GB12803/30A priority patent/GB347480A/en
Application granted granted Critical
Publication of US1778066A publication Critical patent/US1778066A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/30—Fixing blades to rotors; Blade roots ; Blade spacers
    • F01D5/3023—Fixing blades to rotors; Blade roots ; Blade spacers of radial insertion type, e.g. in individual recesses
    • F01D5/3046—Fixing blades to rotors; Blade roots ; Blade spacers of radial insertion type, e.g. in individual recesses the rotor having ribs around the circumference

Definitions

  • the present invention relates to elasticfluid turbines and particularly relates to a construction of bucket dovetail attaching means which provides for heat expansion.
  • Hot steam entering the turbine may cause the ring of bucket bases to increase in circumference much faster than the wheel due to the more direct contact of the buckets with the steam.
  • the bucket bases as temperature conditions are varied, expand radially, laterally, and endwise. The radial and lateral. ex-
  • pansions are not material since only single short dimensions are involved.
  • the endwise expansion of the bucket bases is accumulative and constitutes the circumferential expansion of the ring or annulus of bases.
  • the endwise dimension involved is the circumference of the ring and as this is large the endwise expansion of several hundred buckets which make up a'ring becomes very material. WVhere the bucket bases form a tight fit there is no room for expansion to take place.
  • the bucket bases are restricted from expanding circumferentially they f produce heavy forces on the dovetail connections in aradial direction, tending to break the bucket bases or the dovetail lug of the wheel. Breakages usually occur at or near stages where hot steam may initially enter the turbine.
  • I provide base members 7 with cut-away portions 8 and 9 as shown in the drawing.
  • the cut-away portions 8 are disposed adjacent the center of one end surface of alternate bucket bases 7 forming marginal lugs 10 thereon.
  • the cut-away portions 9 are disposed adjacent to the outer edges of one end surface of the remaining bucket bases forming central lugs 11 thereon.
  • a, wheel a row of buckets having bases attached to the wheel, one-half of said bucket bases being provided with centrally located circumferentially projecting lugs and the other half of said bucket bases being provided with marginal circumferentially projecting lugs, said lugs serving to define spaces between the The bases having the cut-away bases whereby heat expansion of said bases may occur in a circumferential direction.
  • a wheel a row of buckets having bases attached to said wheel by an inverted dovetail joint, lugs defining spaces between said bases, said lugs comprising central circumferentially projecting base lugs which define one-half of said spaces, and marginal circumferentially pro- 10 jecting base lugs which define the other onehalf of said spaces whereby expansion of said bases may occur in a circumferential direction.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Distillation Of Fermentation Liquor, Processing Of Alcohols, Vinegar And Beer (AREA)
US358122A 1929-04-25 1929-04-25 Elastic fluid turbine Expired - Lifetime US1778066A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US358122A US1778066A (en) 1929-04-25 1929-04-25 Elastic fluid turbine
FR694357D FR694357A (fr) 1929-04-25 1930-04-24 Perfectionnements aux systèmes de fixation des aubes dans les turbines à fluide élastique
GB12803/30A GB347480A (en) 1929-04-25 1930-04-25 Improvements in and relating to elastic fluid turbines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US358122A US1778066A (en) 1929-04-25 1929-04-25 Elastic fluid turbine

Publications (1)

Publication Number Publication Date
US1778066A true US1778066A (en) 1930-10-14

Family

ID=23408387

Family Applications (1)

Application Number Title Priority Date Filing Date
US358122A Expired - Lifetime US1778066A (en) 1929-04-25 1929-04-25 Elastic fluid turbine

Country Status (3)

Country Link
US (1) US1778066A (fr)
FR (1) FR694357A (fr)
GB (1) GB347480A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9657581B2 (en) 2012-01-23 2017-05-23 Mtu Aero Engines Gmbh Rotor for a turbomachine

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3025037A (en) * 1957-10-24 1962-03-13 Bert F Beckstrom Gas turbine
US4688992A (en) * 1985-01-25 1987-08-25 General Electric Company Blade platform

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9657581B2 (en) 2012-01-23 2017-05-23 Mtu Aero Engines Gmbh Rotor for a turbomachine

Also Published As

Publication number Publication date
GB347480A (en) 1931-04-30
FR694357A (fr) 1930-12-03

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