GB1066737A - Vibration-damping system for a turbine or compressor blade ring - Google Patents

Vibration-damping system for a turbine or compressor blade ring

Info

Publication number
GB1066737A
GB1066737A GB186966A GB186966A GB1066737A GB 1066737 A GB1066737 A GB 1066737A GB 186966 A GB186966 A GB 186966A GB 186966 A GB186966 A GB 186966A GB 1066737 A GB1066737 A GB 1066737A
Authority
GB
United Kingdom
Prior art keywords
blades
group
shroud plates
blade
turbine
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
Application number
GB186966A
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.)
BBC Brown Boveri AG Switzerland
BBC Brown Boveri France SA
Original Assignee
Brown Boveri und Cie AG Switzerland
BBC Brown Boveri France SA
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 Brown Boveri und Cie AG Switzerland, BBC Brown Boveri France SA filed Critical Brown Boveri und Cie AG Switzerland
Publication of GB1066737A publication Critical patent/GB1066737A/en
Expired legal-status Critical Current

Links

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
    • F01D5/12—Blades
    • F01D5/22—Blade-to-blade connections, e.g. for damping vibrations
    • F01D5/225—Blade-to-blade connections, e.g. for damping vibrations by shrouding

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)

Abstract

1,066,737. Turbine and compressor blades. BROWN, BOVERI & CO. Ltd. Jan. 14, 1966 [Jan. 17, 1965], No. 1869/66. Addition to 979, 392. Heading F1T. Shrouded rotor or stator blades in a turbine or compressor are mounted in at least one group, a number of blades in the group being stressed under non-working and working conditions to urge the individual shroud plates of the blades in the group towards the central blade or blades of the group so that adjacent shroud plates press against one another to effect vibration damping. In a group having four blades 1 to 4, the bodies 11 of the blades 1 or 1 and 2 are prebent in the direction of the arrow 9 and the bodies of the blades 4 or 3 and 4 are prebent in the direction of the arrow 10 so that in the assembled state the blades are urged in the direction of the arrows. The shroud plates of the end blades 1, 4 are spaced from the blades 5, 6 in adjacent groups by means of shims 16 between respective blade roots. The gap between adjacent groups can be omitted if the contacting surfaces of the shroud plates are inclined to the axial plane at an angle whose tangent is greater than the coefficient of friction of the surfaces. In this case the blades receive a torsional as well as a bending prestressing on assembly. In modifications, the prestressing of the blades is achieved by circumferentially shortening certain of the blade roots of a group relative to the shroud plates or by lengthening appropriate shroud plates. Alternatively, the circumferential thickness of mounting elements between adjacent blade roots may be adjusted. The complete blade ring may form a single group, in which case an appropriate gap is left between the shroud plates somewhere on the ring. Different numbers of blades may form a group within any one blade ring.
GB186966A 1965-01-19 1966-01-14 Vibration-damping system for a turbine or compressor blade ring Expired GB1066737A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEB80164A DE1299004B (en) 1965-01-19 1965-01-19 Device for vibration damping on a turbine or compressor blade ring

Publications (1)

Publication Number Publication Date
GB1066737A true GB1066737A (en) 1967-04-26

Family

ID=6980600

Family Applications (1)

Application Number Title Priority Date Filing Date
GB186966A Expired GB1066737A (en) 1965-01-19 1966-01-14 Vibration-damping system for a turbine or compressor blade ring

Country Status (6)

Country Link
AT (1) AT254227B (en)
BE (1) BE675142A (en)
CH (1) CH461535A (en)
DE (1) DE1299004B (en)
DK (1) DK114906B (en)
GB (1) GB1066737A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2215407A (en) * 1988-03-05 1989-09-20 Rolls Royce Plc A bladed rotor assembly
JP2016084780A (en) * 2014-10-28 2016-05-19 三菱重工コンプレッサ株式会社 Shroud cut amount determining method and method for manufacturing rotor

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3211073A1 (en) * 1982-03-25 1983-10-06 Kraftwerk Union Ag DEVICE FOR VIBRATION DAMPING ON A LEAD Vane
US4533298A (en) * 1982-12-02 1985-08-06 Westinghouse Electric Corp. Turbine blade with integral shroud
DE3667521D1 (en) * 1985-08-31 1990-01-18 Bbc Brown Boveri & Cie DEVICE FOR DAMPING VIBRATION VIBRATIONS IN TURBO MACHINES.
DE3802741C2 (en) * 1988-01-30 1997-02-13 Asea Brown Boveri Method of bracing blades
DE19505389A1 (en) * 1995-02-17 1996-08-22 Abb Research Ltd Vibration damping for turbine blades
DE10014189A1 (en) 2000-03-23 2001-09-27 Alstom Power Nv Blade fastening for rotating machinery has blades fitted in slots without play or with pretensioning so that torsional moments acting on inner platform or blade roots oppose torsional moments acting upon outer platform or support wing

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE606351C (en) * 1932-03-23 1934-11-30 Vormals Skodawerke Ag Device for attaching blades for steam or gas turbines
DE1159965B (en) * 1961-08-10 1963-12-27 Bbc Brown Boveri & Cie Device for vibration damping on a turbine or compressor blade ring

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2215407A (en) * 1988-03-05 1989-09-20 Rolls Royce Plc A bladed rotor assembly
JP2016084780A (en) * 2014-10-28 2016-05-19 三菱重工コンプレッサ株式会社 Shroud cut amount determining method and method for manufacturing rotor

Also Published As

Publication number Publication date
DK114906B (en) 1969-08-18
CH461535A (en) 1968-08-31
AT254227B (en) 1967-05-10
BE675142A (en) 1966-05-16
DE1299004B (en) 1969-07-10

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