JPS54114619A - Natural frequency adjusting method of turbine blade - Google Patents
Natural frequency adjusting method of turbine bladeInfo
- Publication number
- JPS54114619A JPS54114619A JP2160278A JP2160278A JPS54114619A JP S54114619 A JPS54114619 A JP S54114619A JP 2160278 A JP2160278 A JP 2160278A JP 2160278 A JP2160278 A JP 2160278A JP S54114619 A JPS54114619 A JP S54114619A
- Authority
- JP
- Japan
- Prior art keywords
- natural frequency
- turbine blade
- volume
- sheet
- blade
- 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.)
- Pending
Links
Landscapes
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
PURPOSE: To accurately compensate the natural frequency of a turbine blade, by deciding the quantity of compensating working for adjusting the natural frequency of the bending of the turbine blade precisely and easily by measuring the volume of a sheet-like portion of the turbine blade.
CONSTITUTION: When producing a turbine blade 1, the turbine blade is manufactured so that its natural frequency range over values slightly higher than the range of the target natural frequency - so that a sheet-like portion 2 of an upper half portion of the blade 1 become thick, and the natural frequency is adjusted. The natural frequency is electrically measured by utilizing a resonance phenomenon. The quentity of the compensating working of the blade 1 with the high natural frequancy is decided by measuring the volume of the sheet-like portion 2. In this case, the quantity of volume to be reduced is decided so that the quantity be brought within the target range by using relationship between approximate linear natural frequency as shown in the characteristic figure and the volume of the turbine blade 1. Known electrolysis working or etching may be adopted in order to realize this uniform volume reducing portion 3 over the whole said sheet-like portion.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2160278A JPS54114619A (en) | 1978-02-28 | 1978-02-28 | Natural frequency adjusting method of turbine blade |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2160278A JPS54114619A (en) | 1978-02-28 | 1978-02-28 | Natural frequency adjusting method of turbine blade |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54114619A true JPS54114619A (en) | 1979-09-06 |
Family
ID=12059576
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2160278A Pending JPS54114619A (en) | 1978-02-28 | 1978-02-28 | Natural frequency adjusting method of turbine blade |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54114619A (en) |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4900230A (en) * | 1989-04-27 | 1990-02-13 | Westinghouse Electric Corp. | Low pressure end blade for a low pressure steam turbine |
EP1239059A2 (en) * | 2001-03-07 | 2002-09-11 | General Electric Company | Chemical milling of the blades of a gas turbine engine |
JP2004211705A (en) * | 2002-12-30 | 2004-07-29 | General Electric Co <Ge> | Method and device for bucket natural frequency tuning |
WO2006084438A1 (en) * | 2005-02-12 | 2006-08-17 | Mtu Aero Engines Gmbh | Method for machining an integrally bladed rotor |
EP2067567A2 (en) * | 2007-12-06 | 2009-06-10 | Rolls-Royce Deutschland Ltd & Co KG | Method for manufacturing of integrally bladed rotors for compressors and turbines |
US8899975B2 (en) | 2011-11-04 | 2014-12-02 | General Electric Company | Combustor having wake air injection |
CN104675443A (en) * | 2014-12-15 | 2015-06-03 | 中国燃气涡轮研究院 | Natural frequency adjusting method of turbine blisk |
US9267687B2 (en) | 2011-11-04 | 2016-02-23 | General Electric Company | Combustion system having a venturi for reducing wakes in an airflow |
JP2016507023A (en) * | 2013-02-05 | 2016-03-07 | シーメンス アクティエンゲゼルシャフト | Detuning method of rotor blade row |
US9322553B2 (en) | 2013-05-08 | 2016-04-26 | General Electric Company | Wake manipulating structure for a turbine system |
US9435221B2 (en) | 2013-08-09 | 2016-09-06 | General Electric Company | Turbomachine airfoil positioning |
US9739201B2 (en) | 2013-05-08 | 2017-08-22 | General Electric Company | Wake reducing structure for a turbine system and method of reducing wake |
-
1978
- 1978-02-28 JP JP2160278A patent/JPS54114619A/en active Pending
Cited By (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4900230A (en) * | 1989-04-27 | 1990-02-13 | Westinghouse Electric Corp. | Low pressure end blade for a low pressure steam turbine |
EP1239059A2 (en) * | 2001-03-07 | 2002-09-11 | General Electric Company | Chemical milling of the blades of a gas turbine engine |
EP1239059A3 (en) * | 2001-03-07 | 2003-08-27 | General Electric Company | Chemical milling of the blades of a gas turbine engine |
JP4721638B2 (en) * | 2002-12-30 | 2011-07-13 | ゼネラル・エレクトリック・カンパニイ | Method and apparatus for adjusting bucket natural frequency |
JP2004211705A (en) * | 2002-12-30 | 2004-07-29 | General Electric Co <Ge> | Method and device for bucket natural frequency tuning |
WO2006084438A1 (en) * | 2005-02-12 | 2006-08-17 | Mtu Aero Engines Gmbh | Method for machining an integrally bladed rotor |
US9382916B2 (en) | 2005-02-12 | 2016-07-05 | Mtu Aero Engines Gmbh | Method for machining an integrally bladed rotor |
US8171632B2 (en) | 2007-12-06 | 2012-05-08 | Rolls-Royce Deutschland Ltd & Co Kg | Method of manufacturing integrally designed rotor wheels to exhibit an essentially identical natural frequency and mass using chemical etch machining |
EP2067567A2 (en) * | 2007-12-06 | 2009-06-10 | Rolls-Royce Deutschland Ltd & Co KG | Method for manufacturing of integrally bladed rotors for compressors and turbines |
DE102007059155A1 (en) * | 2007-12-06 | 2009-06-10 | Rolls-Royce Deutschland Ltd & Co Kg | Process for the manufacture of integrally constructed impellers for compressors and turbines |
EP2067567A3 (en) * | 2007-12-06 | 2009-10-07 | Rolls-Royce Deutschland Ltd & Co KG | Method for manufacturing of integrally bladed rotors for compressors and turbines |
US8899975B2 (en) | 2011-11-04 | 2014-12-02 | General Electric Company | Combustor having wake air injection |
US9267687B2 (en) | 2011-11-04 | 2016-02-23 | General Electric Company | Combustion system having a venturi for reducing wakes in an airflow |
JP2016507023A (en) * | 2013-02-05 | 2016-03-07 | シーメンス アクティエンゲゼルシャフト | Detuning method of rotor blade row |
US9835034B2 (en) | 2013-02-05 | 2017-12-05 | Siemens Aktiengesellschaft | Method for detuning a rotor-blade cascade |
US9322553B2 (en) | 2013-05-08 | 2016-04-26 | General Electric Company | Wake manipulating structure for a turbine system |
US9739201B2 (en) | 2013-05-08 | 2017-08-22 | General Electric Company | Wake reducing structure for a turbine system and method of reducing wake |
US9435221B2 (en) | 2013-08-09 | 2016-09-06 | General Electric Company | Turbomachine airfoil positioning |
CN104675443A (en) * | 2014-12-15 | 2015-06-03 | 中国燃气涡轮研究院 | Natural frequency adjusting method of turbine blisk |
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