US1476626A - Means for fastening the blades of steam and gas turbines - Google Patents

Means for fastening the blades of steam and gas turbines Download PDF

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Publication number
US1476626A
US1476626A US493123A US49312321A US1476626A US 1476626 A US1476626 A US 1476626A US 493123 A US493123 A US 493123A US 49312321 A US49312321 A US 49312321A US 1476626 A US1476626 A US 1476626A
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Prior art keywords
blades
steam
fastening
gas turbines
blade
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Expired - Lifetime
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US493123A
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Losel Franz
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Individual
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Individual
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Publication date
Priority to AT76502D priority Critical patent/AT76502B/en
Priority to DE1918315943D priority patent/DE315943C/de
Priority to FR516377A priority patent/FR516377A/en
Priority to GB636518A priority patent/GB115231A/en
Application filed by Individual filed Critical Individual
Priority to US493123A priority patent/US1476626A/en
Application granted granted Critical
Publication of US1476626A publication Critical patent/US1476626A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • F01D5/303—Fixing blades to rotors; Blade roots ; Blade spacers of radial insertion type, e.g. in individual recesses in a circumferential slot
    • F01D5/3038—Fixing blades to rotors; Blade roots ; Blade spacers of radial insertion type, e.g. in individual recesses in a circumferential slot the slot having inwardly directed abutment faces on both sides

Definitions

  • This invention relates to the blades of steam or gas turbines and particularly to means by which the blades are fixed in the turbine drum, of the type in which they are secured by packing pieces or strips arranged between adjacent blades.
  • each blade is formed with a projection of elliptical form and a correspond ing recess on the other side, the packing strip being correspondingly shaped to fit. In such an arrangement the centrifugal force will tend to shear the interfitting parts.
  • the object of the present invention is to overcome this tendency and a further objcct is to provide an improved means for fastening the blades of steam or gas turbines which will effectually prevent the turbine blades from becoming loose or de tached in any way because an action is pro- (lured which becomes the more intensive the more the blades are strained by centrifugal force.
  • the invention consists in so forming the blade roots and their intermediate packing pieces that they are bent one or more times whereby a toggle action is produced which presses the blades against their adjacent packing pieces with a pressure which is the more intensive the more the blades are strained by centrifugal force.
  • FIG. 1 is a perspective view of the improved blade fastening.
  • Figure 2 is a perspective view of a packing piece.
  • Figures 3 and 4 are vertical sections through the blade and the packing pieces.
  • Figure 5 is a section on the line 5-5 of Figure 3.
  • Figure 6 is a section on the line 6-6 of Figure 5.
  • the root 7 of the blade 8 which is to be inserted in the groove a in the drum 1, and the packing pieces 25 havea bent shape, and the back profile of the packing pieces is completely congruent with that of the blades.
  • the bends may be as shown, or the blade. roots and the packing pieces may have more than one bend.
  • the packing piece may either be made of one piece as shown in Figure 3, or, and preferably, they may be divided at the apex of the bend as shown in Figure 4. They are provided on both sides with a shoulder or rabbet e by which they are held in the groove a in the drum 7".
  • Fastening means for blades of steam or gas turbines comprising a rotor provided with grooves having shoulders, packing means, blade roots inserted in the said grooves between the said packing pieces, which blade roots are bent from the surface of the blade, are longitudinally undulated in an obtuse angle and have a constant crosssectional area, the said undulations extending over the entire width of the blade roots, between packing pieces similarly constant in cross-sectional area but thicker than the packing pieces, as set forth.

Description

Dec. 4 1923.
F. LbsEL MEANS FDR FASTENING THE BLADES 0F STEAM AND GAS TURB'INES Filed Auet. l7 1921 Patented Dec. 4, 1923.
UNITED STATES FRANZ IDSEL, OF BRUNN, CZECHOSLOVAKLA.
IVIEANS FOR- FASTENING TI-IE BLADES OF STEAM AND GAS TURBINES.
Application filed August 17, 1921. Serial No. 493,123.
(GRANTED UNDER. THE PROVISIONS OF THE ACT OF MARCH 3, 1921, 41 STAT. In, 1313.)
To all to 710m it may concern Be it known that I, FRANZ Los a citi- Zen of Czechoslovakia, residing at Brunn, Czechoslovakia, have invented certain new and useful Improved Means for Fastening the Blades of Steam and Gas Turbines (for which I have filed applications in Austria, Feb. 12, 1914; Hungary, Feb. 14, 1914; Roumania, Feb. 23, 1914; Germany, Feb. 14, 1914, Patent #315,943; Switzerland, Feb. 26, 1918, Pat. #78,461; France, Mar. 14, 1918, Patent #516,377; Great Britain, April 15, 1918, Patent #115,231; Italy, July 29, 1919; Czechoslovakia, June 26, 1920; Poland, Jan. 5, 1920), of which the following is a specification.
This invention relates to the blades of steam or gas turbines and particularly to means by which the blades are fixed in the turbine drum, of the type in which they are secured by packing pieces or strips arranged between adjacent blades.
In one construction hitherto proposed, the root end of each blade is formed with a projection of elliptical form and a correspond ing recess on the other side, the packing strip being correspondingly shaped to fit. In such an arrangement the centrifugal force will tend to shear the interfitting parts.
The object of the present invention is to overcome this tendency and a further objcct is to provide an improved means for fastening the blades of steam or gas turbines which will effectually prevent the turbine blades from becoming loose or de tached in any way because an action is pro- (lured which becomes the more intensive the more the blades are strained by centrifugal force.
The invention consists in so forming the blade roots and their intermediate packing pieces that they are bent one or more times whereby a toggle action is produced which presses the blades against their adjacent packing pieces with a pressure which is the more intensive the more the blades are strained by centrifugal force.
In the accompanying drawings Figure 1 is a perspective view of the improved blade fastening.
. Figure 2 is a perspective view of a packing piece.
Figures 3 and 4 are vertical sections through the blade and the packing pieces.
Figure 5 is a section on the line 5-5 of Figure 3, and
Figure 6 is a section on the line 6-6 of Figure 5.
The root 7 of the blade 8 which is to be inserted in the groove a in the drum 1, and the packing pieces 25 havea bent shape, and the back profile of the packing pieces is completely congruent with that of the blades. The bends may be as shown, or the blade. roots and the packing pieces may have more than one bend.
The packing piece may either be made of one piece as shown in Figure 3, or, and preferably, they may be divided at the apex of the bend as shown in Figure 4. They are provided on both sides with a shoulder or rabbet e by which they are held in the groove a in the drum 7".
lVhat I claim is Fastening means for blades of steam or gas turbines, comprising a rotor provided with grooves having shoulders, packing means, blade roots inserted in the said grooves between the said packing pieces, which blade roots are bent from the surface of the blade, are longitudinally undulated in an obtuse angle and have a constant crosssectional area, the said undulations extending over the entire width of the blade roots, between packing pieces similarly constant in cross-sectional area but thicker than the packing pieces, as set forth.
In testimony whereof I have signed my name to this specification.
FRANZ LosnL.
Witnesses V MORITZ J. SUMEKA, KARL RUBIREMS.
US493123A 1914-02-12 1921-08-17 Means for fastening the blades of steam and gas turbines Expired - Lifetime US1476626A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
AT76502D AT76502B (en) 1914-02-12 1914-02-12 Blade attachment for steam and gas turbines.
DE1918315943D DE315943C (en) 1914-02-12 1918-02-05
FR516377A FR516377A (en) 1914-02-12 1918-03-14 Fastening of blades for steam and gas turbines
GB636518A GB115231A (en) 1914-02-12 1918-04-15
US493123A US1476626A (en) 1914-02-12 1921-08-17 Means for fastening the blades of steam and gas turbines

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT76502T 1914-02-12
US493123A US1476626A (en) 1914-02-12 1921-08-17 Means for fastening the blades of steam and gas turbines

Publications (1)

Publication Number Publication Date
US1476626A true US1476626A (en) 1923-12-04

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Family Applications (1)

Application Number Title Priority Date Filing Date
US493123A Expired - Lifetime US1476626A (en) 1914-02-12 1921-08-17 Means for fastening the blades of steam and gas turbines

Country Status (5)

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US (1) US1476626A (en)
AT (1) AT76502B (en)
DE (1) DE315943C (en)
FR (1) FR516377A (en)
GB (1) GB115231A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6299411B1 (en) * 1999-02-12 2001-10-09 Abb Alstom Power (Schweiz) Ag Fastening of moving blades of a fluid-flow machine
US20080003098A1 (en) * 2004-12-21 2008-01-03 Alstom Technology Ltd. Method for modification of a turbocompressor
US20160130955A1 (en) * 2013-05-23 2016-05-12 General Electric Company Composite compressor blade and method of assembling

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE545574A (en) * 1955-02-26
DE1005530B (en) * 1955-06-23 1957-04-04 Paul Miesbeck Fastening of the rotor blades of centrifugal machines, in particular steam and gas turbines

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6299411B1 (en) * 1999-02-12 2001-10-09 Abb Alstom Power (Schweiz) Ag Fastening of moving blades of a fluid-flow machine
US20080003098A1 (en) * 2004-12-21 2008-01-03 Alstom Technology Ltd. Method for modification of a turbocompressor
US20160130955A1 (en) * 2013-05-23 2016-05-12 General Electric Company Composite compressor blade and method of assembling
US10247014B2 (en) * 2013-05-23 2019-04-02 General Electric Company Composite compressor blade and method of assembling

Also Published As

Publication number Publication date
DE315943C (en) 1919-11-17
AT76502B (en) 1919-05-26
GB115231A (en) 1921-01-13
FR516377A (en) 1921-04-18

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