US20080206043A1 - Rotor for a turbomachine - Google Patents

Rotor for a turbomachine Download PDF

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Publication number
US20080206043A1
US20080206043A1 US11/893,079 US89307907A US2008206043A1 US 20080206043 A1 US20080206043 A1 US 20080206043A1 US 89307907 A US89307907 A US 89307907A US 2008206043 A1 US2008206043 A1 US 2008206043A1
Authority
US
United States
Prior art keywords
rotor
housing
oscillating arm
track surface
turbomachine
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.)
Abandoned
Application number
US11/893,079
Other languages
English (en)
Inventor
Christoph Richter
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Assigned to SIEMENS AKTIENGESELLSCHAFT reassignment SIEMENS AKTIENGESELLSCHAFT ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: RICHTER, CHRISTOPH
Publication of US20080206043A1 publication Critical patent/US20080206043A1/en
Abandoned legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/10—Suppression of vibrations in rotating systems by making use of members moving with the system
    • F16F15/14—Suppression of vibrations in rotating systems by making use of members moving with the system using masses freely rotating with the system, i.e. uninvolved in transmitting driveline torque, e.g. rotative dynamic dampers
    • F16F15/1407—Suppression of vibrations in rotating systems by making use of members moving with the system using masses freely rotating with the system, i.e. uninvolved in transmitting driveline torque, e.g. rotative dynamic dampers the rotation being limited with respect to the driving means
    • F16F15/145—Masses mounted with play with respect to driving means thus enabling free movement over a limited range
    • 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
    • F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
    • F01D25/04—Antivibration arrangements
    • 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
    • F01D5/02—Blade-carrying members, e.g. rotors
    • F01D5/10—Anti- vibration means
    • 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
    • F01D5/26—Antivibration means not restricted to blade form or construction or to blade-to-blade connections or to the use of particular materials

Definitions

  • the invention refers to a rotor for a turbomachine, wherein the rotor has a vibration reduction device, which is formed in such a way that it damps vibrations of the rotor which emerge during operation of the turbomachine.
  • the shafts of generators as a rule are rotationally connected to drive units, like, for example, steam turbines or gas turbines.
  • the frequency of generator shafts lies at 50 or 60 Hertz, as the case may be.
  • the generator shaft trains experience rotational vibration excitations via the generator.
  • the rotor train vibrations and the amplitudes which occur in the process are potentially very detrimental for the rotor shaft and also for the turbine blades which are connected to it, if the amplitudes which occur exceed defined values.
  • the object is achieved by means of a rotor for a turbomachine, wherein the rotor has a vibration reduction device which is formed in such a way that it damps vibrations of the rotor which emerge during operation of the turbomachine.
  • the vibration reduction device in this case has a housing, wherein a track surface is formed inside the housing, wherein the vibration reduction device comprises a rolling body in the housing, which rolling body is arranged with capability of movement on the track surface.
  • the invention is based on the aspect that a vibration reduction device can be simply and quickly attached on a rotor surface.
  • the vibration reduction device in this case is formed with a rolling body which counteracts a vibration of the rotor surface. The counteraction is achieved by the presence of inertia of the rolling body.
  • the rolling body in a preferred embodiment is a ball or a cylinder. Especially these embodiments are simple in production, as a result of which the vibration reduction device is favorable and inexpensive.
  • the track surface is preferably curved, as a result of which different frequencies of the vibration reduction device can be established.
  • the track surface is preferably convexly curved with regard to the rotational axis of the rotor.
  • the vibration reduction device has a pendulum, wherein the pendulum has an oscillating mass which is arranged on an oscillating arm, wherein the oscillating arm is arranged with capability of rotation.
  • the oscillating arm in this case is mounted with capability of rotation around a point of rotation.
  • FIG. 1 shows a sectional view of a rotor with a vibration reduction device
  • FIG. 2 shows a sectional view of a rotor with all alternative vibration reduction device.
  • FIG. 1 a sectional view of a rotor 1 with a vibration reduction device 2 is shown.
  • the vibration reduction device 2 has a housing 3 and is formed in such a way that it damps vibrations of the rotor 1 which emerge during operation of the turbomachine.
  • the rotor 1 can be arranged in a turbomachine which is not shown in detail.
  • a track surface 4 is formed inside the housing 3 , wherein the vibration reduction device 2 comprises a rolling body 5 in the housing 3 , which rolling body is arranged with capability of movement on the track surface 4 .
  • a centrifugal force acts in the radial direction 6 and, in a manner of speaking, presses the rolling body 5 against the track surface 4 .
  • the rolling body 5 With a constant rotational speed, the rolling body 5 is in a neutral position and does not change its position with regard to the track surface 4 . If, however, the rotational speed of the rotor 1 is not constant, but is superposed by a harmonic disturbing function, this leads to an excitation of the rolling body 5 which ultimately leads to a movement on the track surface 4 .
  • a movement of the rotor in one rotational direction 7 brings about a movement in the opposite direction 8 .
  • the rolling body 5 in this case is formed either as a ball or as a cylinder.
  • the track surface 4 is formed in a curved manner, so that the rolling body 5 experiences a restoring force in the direction of the neutral position 9 .
  • the inclination of the track surface 4 has an influence on the restoring force on the rolling body 5 .
  • the damping of the rolling body 5 is augmented by a fluid, like, for example, oil or a tribological fluid, being located in the housing 3 of the vibration reduction device 2 .
  • the housing 3 can be screwed onto a basic body 10 which is arranged on the rotor 1 .
  • the track surface 4 can be formed in a curved manner with regard to the rotational axis 11 of the rotor.
  • the vibration reduction device 2 has a pendulum 12 .
  • the vibration reduction device 2 is formed in such a way that it damps vibrations of the rotor 1 which emerge during operation of the turbomachine.
  • the pendulum 12 has an oscillating mass 14 which is arranged on an oscillating arm 13 , wherein the oscillating arm 13 is arranged with capability of rotation.
  • the oscillating arm 13 in this case is arranged with capability of rotation around a point of rotation 15 or around an axis of oscillation 16 .
  • the oscillating arm is arranged on an element 17 .
  • the oscillating arm 13 furthermore comprises a rolling body 18 which is arranged on one end of the oscillating arm 13 .
  • This rolling body 18 is movable along a track, wherein the track can be formed in a convexly curved manner with regard to the rotational axis of the rotor 1 .

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Vibration Prevention Devices (AREA)
  • Supercharger (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
US11/893,079 2006-08-16 2007-08-14 Rotor for a turbomachine Abandoned US20080206043A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP06017046.1 2006-08-16
EP06017046.1A EP1892379B1 (de) 2006-08-16 2006-08-16 Rotor für eine Strömungsmaschine

Publications (1)

Publication Number Publication Date
US20080206043A1 true US20080206043A1 (en) 2008-08-28

Family

ID=37834175

Family Applications (1)

Application Number Title Priority Date Filing Date
US11/893,079 Abandoned US20080206043A1 (en) 2006-08-16 2007-08-14 Rotor for a turbomachine

Country Status (4)

Country Link
US (1) US20080206043A1 (ja)
EP (1) EP1892379B1 (ja)
JP (1) JP2008045747A (ja)
CN (1) CN101126323A (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11466570B2 (en) 2018-09-26 2022-10-11 Mitsubishi Heavy Industries Aero Engines, Ltd. Rotor assembly and rotating machine

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3016659B1 (fr) * 2014-01-20 2016-03-04 Snecma Organe mobile de turbomachine qui comporte des moyens pour changer sa frequence de resonance
FR3084912B1 (fr) * 2018-08-07 2020-07-03 Safran Aircraft Engines Dispositif de reduction de contraintes pour arbre de turbomachine

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1856786A (en) * 1931-10-16 1932-05-03 Gen Electric Bucket wheel and like rotating member
US2349187A (en) * 1941-03-08 1944-05-16 Westinghouse Electric & Mfg Co Vibration dampener
US5639214A (en) * 1995-04-27 1997-06-17 Eurocopter France Vibration damping apparatus for helicopter rotor
US5845542A (en) * 1992-05-21 1998-12-08 Eti Technologies Inc. Dynamic balancing method and apparatus
US5941133A (en) * 1996-04-19 1999-08-24 Eti Technologies Inc. Torsional and translational vibration removing device
US6520047B2 (en) * 1999-03-16 2003-02-18 Mannesmann Sachs Ag Vibration damping device

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5924845A (en) * 1997-04-07 1999-07-20 The United States Of America As Represented By The Secretary Of The Air Force Centrifugal pendulum absorber for engine blades
JP2003014089A (ja) * 2001-06-28 2003-01-15 Toyota Industries Corp 回転体および圧縮機
DE10202995B4 (de) * 2002-01-26 2004-01-29 Nordex Energy Gmbh Rotorblatt für eine Windkraftanlage mit einer Dämpfereinrichtung

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1856786A (en) * 1931-10-16 1932-05-03 Gen Electric Bucket wheel and like rotating member
US2349187A (en) * 1941-03-08 1944-05-16 Westinghouse Electric & Mfg Co Vibration dampener
US5845542A (en) * 1992-05-21 1998-12-08 Eti Technologies Inc. Dynamic balancing method and apparatus
US5639214A (en) * 1995-04-27 1997-06-17 Eurocopter France Vibration damping apparatus for helicopter rotor
US5941133A (en) * 1996-04-19 1999-08-24 Eti Technologies Inc. Torsional and translational vibration removing device
US6520047B2 (en) * 1999-03-16 2003-02-18 Mannesmann Sachs Ag Vibration damping device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11466570B2 (en) 2018-09-26 2022-10-11 Mitsubishi Heavy Industries Aero Engines, Ltd. Rotor assembly and rotating machine

Also Published As

Publication number Publication date
EP1892379B1 (de) 2015-11-18
JP2008045747A (ja) 2008-02-28
EP1892379A1 (de) 2008-02-27
CN101126323A (zh) 2008-02-20

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Legal Events

Date Code Title Description
AS Assignment

Owner name: SIEMENS AKTIENGESELLSCHAFT, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:RICHTER, CHRISTOPH;REEL/FRAME:019741/0310

Effective date: 20070715

Owner name: SIEMENS AKTIENGESELLSCHAFT,GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:RICHTER, CHRISTOPH;REEL/FRAME:019741/0310

Effective date: 20070715

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION