GB1271363A - Improvements in or relating to rotor blades for fluid flow machines - Google Patents

Improvements in or relating to rotor blades for fluid flow machines

Info

Publication number
GB1271363A
GB1271363A GB3687368A GB3687368A GB1271363A GB 1271363 A GB1271363 A GB 1271363A GB 3687368 A GB3687368 A GB 3687368A GB 3687368 A GB3687368 A GB 3687368A GB 1271363 A GB1271363 A GB 1271363A
Authority
GB
United Kingdom
Prior art keywords
blade
vibration
liquid
sealed duct
aug
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
GB3687368A
Inventor
Albert Jubb
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.)
Rolls Royce PLC
Original Assignee
Rolls Royce PLC
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 Rolls Royce PLC filed Critical Rolls Royce PLC
Priority to GB3687368A priority Critical patent/GB1271363A/en
Publication of GB1271363A publication Critical patent/GB1271363A/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
    • 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
    • F01D5/14—Form or construction
    • F01D5/16—Form or construction for counteracting blade vibration

Landscapes

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

Abstract

1,271,363. Dampers. ROLLS-ROYCE Ltd. 1 Aug., 1969 [1 Aug., 1968], No. 36873/68. Heading F2S. [Also in Division F1] A turbine or compressor rotor blade 10 is provided with at least one sealed duct which is partially filled with a material such as sodium, potassium or a mixture thereof which is liquid at normal operating temperature of the blade, the duet being arranged so that the flow of liquid assists vibration damping of the blade. In one arrangement the sealed duct is a closed circuit formed by a groove 28 machined in one of the mating surfaces 24, 26 of the two parts 20, 22 of a shroud 18, the plane of the mating surfaces being inclined at a small angle to the plane perpendicular to the axis of the blade. When the latter is subject to its principal mode of vibration, i.e. circumferentially of the rotor, the liquid flows backwards and forwards through a restriction 32, dissipating energy and thus damping vibration. Several grooves 28 may be provided, each arranged to damp a different mode of vibration. In modifications, restriction 32 may be replaced by a sinuous portion, while the sealed duct need not form a closed circuit.
GB3687368A 1968-08-01 1968-08-01 Improvements in or relating to rotor blades for fluid flow machines Expired GB1271363A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3687368A GB1271363A (en) 1968-08-01 1968-08-01 Improvements in or relating to rotor blades for fluid flow machines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3687368A GB1271363A (en) 1968-08-01 1968-08-01 Improvements in or relating to rotor blades for fluid flow machines

Publications (1)

Publication Number Publication Date
GB1271363A true GB1271363A (en) 1972-04-19

Family

ID=10391876

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3687368A Expired GB1271363A (en) 1968-08-01 1968-08-01 Improvements in or relating to rotor blades for fluid flow machines

Country Status (1)

Country Link
GB (1) GB1271363A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4460314A (en) * 1980-12-29 1984-07-17 Rolls-Royce Limited Vibration damped rotor blades for turbomachines
EP0335299A1 (en) * 1988-03-28 1989-10-04 Semm-Tec Gmbh Vibration damper for axial flow blades
GB2247932A (en) * 1990-09-12 1992-03-18 John Douglas Hue Fluid vibration damper for racquets, bats, clubs, and hammers
EP2851510A1 (en) * 2013-09-24 2015-03-25 Siemens Aktiengesellschaft Blade for a flow engine
EP2947271A1 (en) * 2014-05-22 2015-11-25 United Technologies Corporation Airfoil with fluid damper and methods of making
WO2020142113A1 (en) * 2019-01-02 2020-07-09 Dresser-Rand Company Platform seal and damper assembly for turbomachinery and methodology for forming said assembly
CN117536692A (en) * 2024-01-09 2024-02-09 中国航发沈阳发动机研究所 Turbine rotor blade damping sealing structure and interference calculation method thereof

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4460314A (en) * 1980-12-29 1984-07-17 Rolls-Royce Limited Vibration damped rotor blades for turbomachines
EP0335299A1 (en) * 1988-03-28 1989-10-04 Semm-Tec Gmbh Vibration damper for axial flow blades
GB2247932A (en) * 1990-09-12 1992-03-18 John Douglas Hue Fluid vibration damper for racquets, bats, clubs, and hammers
EP2851510A1 (en) * 2013-09-24 2015-03-25 Siemens Aktiengesellschaft Blade for a flow engine
EP2947271A1 (en) * 2014-05-22 2015-11-25 United Technologies Corporation Airfoil with fluid damper and methods of making
WO2020142113A1 (en) * 2019-01-02 2020-07-09 Dresser-Rand Company Platform seal and damper assembly for turbomachinery and methodology for forming said assembly
US11492909B2 (en) 2019-01-02 2022-11-08 Dresser-Rand Company Platform seal and damper assembly for turbomachinery and methodology for forming said assembly
CN117536692A (en) * 2024-01-09 2024-02-09 中国航发沈阳发动机研究所 Turbine rotor blade damping sealing structure and interference calculation method thereof
CN117536692B (en) * 2024-01-09 2024-04-09 中国航发沈阳发动机研究所 Turbine rotor blade damping sealing structure and interference calculation method thereof

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