GB1066737A - Vibration-damping system for a turbine or compressor blade ring - Google Patents
Vibration-damping system for a turbine or compressor blade ringInfo
- 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
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.
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)
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)
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)
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 |
-
1965
- 1965-01-19 DE DEB80164A patent/DE1299004B/en active Pending
-
1966
- 1966-01-10 AT AT17366A patent/AT254227B/en not_active Expired
- 1966-01-14 GB GB186966A patent/GB1066737A/en not_active Expired
- 1966-01-14 CH CH52266A patent/CH461535A/en unknown
- 1966-01-14 DK DK21266A patent/DK114906B/en unknown
- 1966-01-14 BE BE675142D patent/BE675142A/xx unknown
Cited By (2)
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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