EP1163426A1 - Turbomachine blade - Google Patents
Turbomachine bladeInfo
- Publication number
- EP1163426A1 EP1163426A1 EP00908907A EP00908907A EP1163426A1 EP 1163426 A1 EP1163426 A1 EP 1163426A1 EP 00908907 A EP00908907 A EP 00908907A EP 00908907 A EP00908907 A EP 00908907A EP 1163426 A1 EP1163426 A1 EP 1163426A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- blade
- edge
- airfoil
- hole
- 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.)
- Granted
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
-
- 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
- F01D5/147—Construction, i.e. structural features, e.g. of weight-saving hollow blades
-
- 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
- F01D5/24—Blade-to-blade connections, e.g. for damping vibrations using wire or the like
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S416/00—Fluid reaction surfaces, i.e. impellers
- Y10S416/50—Vibration damping features
Definitions
- the invention relates to a turbomachine blade provided with a damper wire hole according to the preamble of claim 1.
- damper wires or other damping elements are often used, which are received in corresponding holes in the blades.
- increased stresses occur especially at the edges of the holes.
- the contact area that the damper wire has with the damper wire hole during operation of the turbomachine is defined by the distance between the boundary planes of the reinforcements. This distance or the length of the contact area is chosen so that both sufficient static and dynamic strength is guaranteed.
- the invention tries to avoid all these disadvantages. It is the object of the invention to improve the efficiency of a turbomachine blade which has a reinforced hole for receiving a damping element
- the two acute angles .alpha. And .beta. are preferably formed in a range from 5 ° to 30 °. It has been shown that with such a configuration, particularly minor disturbances in the flow occur in the area of the damping elements
- FIG. 3 shows a section through the rotor blade, along the line III-III in FIG. 1 Only the elements essential for understanding the invention are shown. For example, the other components of the exhaust gas turbine, including its turbine wheel, are not shown
- the turbine machine blade shown in FIG. 1, designed as a rotor blade 1, consists of a blade root 2, a platform 3 and an airfoil 4.
- the platforms of adjacent turbine blades of the turbine wheel lie directly against one another and thus form the inner boundary of the flow channel, which is directed outwards from one Blade cover, also not shown, is completed.
- the blade 4 has an entry edge 5, a discharge edge 6, a suction side 7 and a pressure side 8 and has a blade tip 9
- the airfoil 4 there is a through hole 10 from the suction side 7 to the pressure side 8 for receiving a steam wire, not shown, which reduces the blade vibration occurring during operation.
- the airfoil is also formed with an edge region 11 reinforced towards the hole 10, the edge region 11 both on the suction side 7 and on the pressure side 11 has an end surface 12, 13 which is raised in relation to the airfoil 4.
- the end surfaces 12, 13 are at an acute angle ex of approximately 10 ° open to the leading edge 5 of the airfoil 4 and with one to the airfoil tip 9 open, acute angle ⁇ of approximately 20 ° (FIG. 2, FIG. 3)
- both end faces 12, 13 of the reinforced edge region 11 converge in the direction of the discharge edge 6 of the airfoil 4 and in the direction of the blade root 2 in such a way that the reinforcement of the outlet-side and the blade foot-side part of the edge region 11 is significantly less than the reinforcement the part of the edge region 11 on the entrance side and the blade tip side
- This formation of the airfoil 4 in the region of the hole 10 results in improved flow control during operation of the turbocharger or the exhaust gas turbine.
- the working medium flowing along the airfoil 4 in a main flow direction 14 experiences, as a result of the end faces 12, 13 arranged at an acute angle to one another as described above, a significantly lower disturbance than is the case with the solutions of the prior art. Due to the improved flow guidance in the area of the turbine wheel, a higher efficiency of the turbocharger and thus ultimately also of the internal combustion engine connected to it can be achieved.
- angles ⁇ and ⁇ between the end faces 12, 13 of the reinforced edge region 11 are each advantageously in a range from 5 ° to 30 °.
- end surfaces 12, 13 can also have only one of the two acute angles ⁇ , ⁇ (not shown), which simplifies production but represents a certain loss in efficiency.
- such a reinforcement of the edge region of the hole receiving the damper wire can be used for all types of damping elements, such as, for example, also in the case of binding wires, bolts, etc. and also in the case of so-called zigzag bonds.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Architecture (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Supercharger (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19913265 | 1999-03-24 | ||
DE19913265A DE19913265A1 (en) | 1999-03-24 | 1999-03-24 | Turbomachine blade |
PCT/CH2000/000171 WO2000057030A1 (en) | 1999-03-24 | 2000-03-23 | Turbomachine blade |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1163426A1 true EP1163426A1 (en) | 2001-12-19 |
EP1163426B1 EP1163426B1 (en) | 2003-06-18 |
Family
ID=7902195
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00908907A Expired - Lifetime EP1163426B1 (en) | 1999-03-24 | 2000-03-23 | Turbomachine blade |
Country Status (8)
Country | Link |
---|---|
US (1) | US6520741B1 (en) |
EP (1) | EP1163426B1 (en) |
JP (1) | JP4531268B2 (en) |
KR (1) | KR100718859B1 (en) |
CN (1) | CN1171005C (en) |
DE (2) | DE19913265A1 (en) |
TW (1) | TW440654B (en) |
WO (1) | WO2000057030A1 (en) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2928174B1 (en) * | 2008-02-28 | 2011-05-06 | Snecma | DAWN WITH NON AXISYMETRIC PLATFORM: HOLLOW AND BOSS ON EXTRADOS. |
KR101324249B1 (en) * | 2011-12-06 | 2013-11-01 | 삼성테크윈 주식회사 | Turbine impeller comprising a blade with squealer tip |
US20140215998A1 (en) * | 2012-10-26 | 2014-08-07 | Honeywell International Inc. | Gas turbine engines with improved compressor blades |
WO2015085078A1 (en) * | 2013-12-05 | 2015-06-11 | United Technologies Corporation | Hollow blade having internal damper |
DE102014223231B4 (en) | 2014-11-13 | 2017-09-07 | MTU Aero Engines AG | A blade arrangement |
GB201511416D0 (en) | 2015-06-30 | 2015-08-12 | Napier Turbochargers Ltd | Turbomachinery rotor blade |
WO2019057655A1 (en) * | 2017-09-20 | 2019-03-28 | Sulzer Turbo Services Venlo B.V. | Assembly of vane units |
CN107514292A (en) * | 2017-09-30 | 2017-12-26 | 南京赛达机械制造有限公司 | A kind of torsion fracture resistant turbine blade |
CN114396315A (en) * | 2021-12-27 | 2022-04-26 | 哈尔滨工程大学 | Sawtooth crown turbine blade with hybrid cooling-sealing structure |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE393333C (en) * | 1924-04-01 | Karl Imfeld Dipl Ing | Blades for turbines | |
FR1252766A (en) * | 1959-12-18 | 1961-02-03 | Alsthom Cgee | Spacers for turbine blades |
JPS5035602B1 (en) * | 1970-09-14 | 1975-11-18 | ||
JPS50158705A (en) * | 1974-06-17 | 1975-12-22 | ||
JPS5395406A (en) * | 1977-02-02 | 1978-08-21 | Hitachi Ltd | Connection structure for vane |
FR2381905A1 (en) * | 1977-02-24 | 1978-09-22 | Snecma | Rotating turbine blade with vibration damping wire - has reinforcing flanges round edges of hole for wire to restore strength |
CH622313A5 (en) * | 1977-09-14 | 1981-03-31 | Bbc Brown Boveri & Cie | |
JPS6045285B2 (en) * | 1978-02-01 | 1985-10-08 | 株式会社日立製作所 | Moving blade coupling device |
JPS5832904A (en) * | 1981-08-20 | 1983-02-26 | Toshiba Corp | Steam turbine blade |
JPS5919902U (en) * | 1982-07-29 | 1984-02-07 | 株式会社東芝 | steam turbine blade |
JPS6278404A (en) * | 1985-09-30 | 1987-04-10 | Toshiba Corp | Reinforced construction of steam turbine blade |
DE4229769A1 (en) * | 1992-09-05 | 1994-03-10 | Asea Brown Boveri | Damping element for turbine blades - consists of connecting tube widened at one end and joining two blades |
US5267834A (en) * | 1992-12-30 | 1993-12-07 | General Electric Company | Bucket for the last stage of a steam turbine |
-
1999
- 1999-03-24 DE DE19913265A patent/DE19913265A1/en not_active Withdrawn
-
2000
- 2000-03-21 TW TW089105124A patent/TW440654B/en not_active IP Right Cessation
- 2000-03-23 KR KR1020017011799A patent/KR100718859B1/en not_active IP Right Cessation
- 2000-03-23 WO PCT/CH2000/000171 patent/WO2000057030A1/en active IP Right Grant
- 2000-03-23 JP JP2000606875A patent/JP4531268B2/en not_active Expired - Fee Related
- 2000-03-23 EP EP00908907A patent/EP1163426B1/en not_active Expired - Lifetime
- 2000-03-23 US US09/937,316 patent/US6520741B1/en not_active Expired - Lifetime
- 2000-03-23 CN CNB008054312A patent/CN1171005C/en not_active Expired - Fee Related
- 2000-03-23 DE DE50002590T patent/DE50002590D1/en not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO0057030A1 * |
Also Published As
Publication number | Publication date |
---|---|
KR100718859B1 (en) | 2007-05-16 |
JP2002540335A (en) | 2002-11-26 |
TW440654B (en) | 2001-06-16 |
US6520741B1 (en) | 2003-02-18 |
EP1163426B1 (en) | 2003-06-18 |
CN1359445A (en) | 2002-07-17 |
WO2000057030A1 (en) | 2000-09-28 |
CN1171005C (en) | 2004-10-13 |
KR20020004969A (en) | 2002-01-16 |
JP4531268B2 (en) | 2010-08-25 |
DE19913265A1 (en) | 2000-09-28 |
DE50002590D1 (en) | 2003-07-24 |
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