EP0707136B1 - Trommelrotor für eine axial durchströmte Turbomaschine - Google Patents
Trommelrotor für eine axial durchströmte Turbomaschine Download PDFInfo
- Publication number
- EP0707136B1 EP0707136B1 EP95810615A EP95810615A EP0707136B1 EP 0707136 B1 EP0707136 B1 EP 0707136B1 EP 95810615 A EP95810615 A EP 95810615A EP 95810615 A EP95810615 A EP 95810615A EP 0707136 B1 EP0707136 B1 EP 0707136B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- groove
- blade
- radii
- blade groove
- drum rotor
- 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 - Lifetime
Links
- 230000003247 decreasing effect Effects 0.000 claims 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
Images
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
- F01D5/30—Fixing blades to rotors; Blade roots ; Blade spacers
- F01D5/3023—Fixing blades to rotors; Blade roots ; Blade spacers of radial insertion type, e.g. in individual recesses
- F01D5/303—Fixing blades to rotors; Blade roots ; Blade spacers of radial insertion type, e.g. in individual recesses in a circumferential slot
- F01D5/3038—Fixing blades to rotors; Blade roots ; Blade spacers of radial insertion type, e.g. in individual recesses in a circumferential slot the slot having inwardly directed abutment faces on both sides
Definitions
- the invention relates to a drum rotor for an axial flowed through turbomachine, in which the blades with their feet in rows in circumferential blade grooves lateral tines are attached.
- Such drum rotors are known from EP 0 520 260 B1.
- the rotating ones change Blade grooves have their axial dimension with every rotor revolution. Due to the resulting changing voltages, damage to the rotor turns.
- damage to the rotor turns.
- at Temperature changes for example in operational Fluctuations in the first blade groove are strong asymmetrical Shifts occur.
- To avoid damage usually becomes one before the first blade groove empty, circumferential pre-groove arranged. This pre-groove however, weakens the drum rotor and disrupts the flow of the Work equipment.
- the lead groove is therefore mostly with Lock segments equipped. The Vornut and the Closure segments create additional work production and assembly, as well as an additional one Material consumption.
- the invention is based, with one Drum rotor of the type mentioned at the outset and asymmetrical deformations of the first blade groove one calculated using the finite element method Avoid geometrical shaping of the blade groove.
- the advantages of the invention are among them see that the rotor properties remain unchanged.
- the Flow of the work equipment is not affected.
- the Blade groove can be manufactured and without significant additional effort all conventional parts, such as blades, can be used without Adjustments are used.
- Blade grooves corresponding to the first blade groove be shaped asymmetrically to include in them Axial shifts and asymmetrical deformations too avoid.
- FIG. 1 shows the first three rows of a high-pressure rotor 1.
- the individual blades consisting of blade 2 and Blade root 3, are in circumferential blade grooves 10, 11 and 12 used.
- the blade groove 10 is there on the steam inlet side, the blade groove 12 on the steam outlet side.
- the flow-limiting contour 4 of the not shown Cylinder is shown in dash-dot lines.
- Fig. 2 shows the hammer head shape of the blade root 3 in Detail. The forces occurring during operation are over Carrying teeth 5 of the blade groove 10 are introduced into the rotor 1.
- the previous groove contour 6 is shown in dashed lines on the steam inlet side.
- the previous groove contour is retained on the steam outlet side.
- the asymmetrical shape of the blade groove 10 is described by a plurality of successive radii R1, R2, R3 and R4.
- the radius R1 is larger than R2, R2 is larger than R3 and R3 is larger than R4.
- Points A, B, C, D and E are defined on the contour of the part of the blade groove 10 which is described by the radii R1 to R4. These points divide the contour on the steam inlet side into circular arcs 21, 22, 23 and 24 described by the radii R1 to R4.
- Circular arc 21 goes from point A to point B
- circular arc 22 goes from point B to point C, and so on.
- the points AE are locations of common tangents of the partial curves touching each other there.
- a straight line T through the point C is a tangent to the circular arc 22 described by the radius R2
- the straight line T is also a tangent to the circular arc 23 described by the radius R3.
- the centers of the circular arcs 22 and 23 are perpendicular to the tangent T through point C. The same applies to the centers of the other arcs.
- the groove is returned to the previous groove contour by an essentially arbitrarily shaped curve 25 at point F.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Description
Es zeigen:
- Fig. 1
- einen Teillängsschnitt eines beschaufelten Trommelrotors;
- Fig. 2
- einen vergrösserten Ausschnitt des Details II aus Fig.1.
Die asymmetrische Form der Schaufelnut 10 wird durch mehrere, aufeinanderfolgende Radien R1, R2, R3 und R4 beschrieben. Der Radius R1 ist grösser als R2, R2 ist grösser als R3 und R3 ist grösser als R4. Auf der Kontur des Teiles der Schaufelnut 10, der durch die Radien R1 bis R4 beschrieben wird, sind Punkte A, B, C, D und E definiert. Diese Punkte unterteilen die dampfeintrittseitige Kontur in durch die Radien R1 bis R4 beschriebene Kreisbögen 21, 22, 23 und 24. Kreisbogen 21 geht dabei von Punkt A zu Punkt B, Kreisbogen 22 geht von Punkt B zu Punkt C, und so weiter. Die Punkte A-E sind jeweils Orte von gemeinsamen Tangenten der sich dort berührenden Teilkurven. So sei eine Gerade T durch den Punkt C eine Tangente des durch den Radius R2 beschriebenen Kreisbogens 22, dann ist die Gerade T auch Tangente des durch den Radius R3 beschriebenen Kreisbogens 23. Daraus folgt, dass die Mittelpunkte der Kreisbögen 22 und 23 auf einer senkrechten zur Tangenten T durch den Punkt C liegen. Entsprechendes gilt für die Mittelpunkte der weiteren Kreisbögen. Vom Punkt E aus wird die Nut durch eine im wesentlichen beliebig geformte Kurve 25 im Punkt F in die bisherige Nutkontur zurückgeführt.
- 1
- Rotor
- 2
- Schaufelblatt
- 3
- Schaufelfuss
- 4
- Zylinderkontur
- 5
- Tragezacken
- 6
- bisherige Nutkontur
- 10
- erste Schaufelnut
- 11
- zweite Schaufelnut
- 12
- dritte Schaufelnut
- 21
- Kreisbogen A-B
- 22
- Kreisbogen B-C
- 23
- Kreisbogen C-D
- 24
- Kreisbogen D-E
- 25
- Teilkurve E-F
- R1, R2, R3, R4
- Radien der Kreisbögen
- A-F
- Punkte auf der Nutkontur
Claims (1)
- Trommelrotor (1) für eine axial durchströmte Turbomaschine, in welchem die Schaufeln mit ihren Füssen (3) reihenweise in umlaufenden Schaufelnuten (10, 11, 12) mit seitlichen Tragzacken befestigt sind, dadurch gekennzeichnet, dass
mindestens die arbeitsmitteleintrittseitig erste Schaufelnut (10) asymmetrisch ausgebildet ist und dass die arbeitsmitteleintrittseitige Kontur der Schaufelnut (10) durch mehrere Radien (R1-R4) ausgeformt ist, wobei ausgehend vom Nutgrund der Schaufelnut (10) die Radien der aufeinanderfolgenden Kreisbögen der Reihe noch abnehmen und die durch die Radien (R1-R4) gebildeten Kreisbögen (21-24) an ihren Berührungspunkten eine gemeinsame Tangente (T) besitzen.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4436727 | 1994-10-14 | ||
DE4436727A DE4436727A1 (de) | 1994-10-14 | 1994-10-14 | Trommelrotor für eine axial durchströmte Turbomaschine |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0707136A1 EP0707136A1 (de) | 1996-04-17 |
EP0707136B1 true EP0707136B1 (de) | 1998-11-25 |
Family
ID=6530754
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95810615A Expired - Lifetime EP0707136B1 (de) | 1994-10-14 | 1995-10-03 | Trommelrotor für eine axial durchströmte Turbomaschine |
Country Status (4)
Country | Link |
---|---|
US (1) | US5575623A (de) |
EP (1) | EP0707136B1 (de) |
JP (1) | JP3665394B2 (de) |
DE (2) | DE4436727A1 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20100074754A1 (en) * | 2008-09-19 | 2010-03-25 | Thunder Tiger Corporation | Securing Device For Connecting Blades To Blade-Root Attachment Of Remote-Control Helicopters |
CH702204A1 (de) * | 2009-11-10 | 2011-05-13 | Alstom Technology Ltd | Rotor für eine axial durchströmte turbomaschine sowie gasturbine für solchen rotor. |
US8734112B2 (en) | 2010-11-30 | 2014-05-27 | United Technologies Corporation | Asymmetrical rotor blade slot attachment |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4191509A (en) * | 1977-12-27 | 1980-03-04 | United Technologies Corporation | Rotor blade attachment |
JPS58167807A (ja) * | 1982-03-29 | 1983-10-04 | Hitachi Ltd | タ−ボ機械のブレ−ド取付構造 |
RU1784065C (ru) * | 1989-05-31 | 1992-12-23 | О.И. Довгаус | Диск турбомашины |
US5141401A (en) * | 1990-09-27 | 1992-08-25 | General Electric Company | Stress-relieved rotor blade attachment slot |
DE59200524D1 (de) * | 1991-06-28 | 1994-10-27 | Asea Brown Boveri | Laufschaufelbefestigung. |
DE59200115D1 (de) * | 1991-06-28 | 1994-05-19 | Asea Brown Boveri | Trommelrotor für axial durchströmte Turbomaschine. |
US5474423A (en) * | 1994-10-12 | 1995-12-12 | General Electric Co. | Bucket and wheel dovetail design for turbine rotors |
-
1994
- 1994-10-14 DE DE4436727A patent/DE4436727A1/de not_active Withdrawn
-
1995
- 1995-09-11 US US08/526,104 patent/US5575623A/en not_active Expired - Lifetime
- 1995-10-03 EP EP95810615A patent/EP0707136B1/de not_active Expired - Lifetime
- 1995-10-03 DE DE59504324T patent/DE59504324D1/de not_active Expired - Lifetime
- 1995-10-13 JP JP26581495A patent/JP3665394B2/ja not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JP3665394B2 (ja) | 2005-06-29 |
US5575623A (en) | 1996-11-19 |
DE59504324D1 (de) | 1999-01-07 |
JPH08200006A (ja) | 1996-08-06 |
EP0707136A1 (de) | 1996-04-17 |
DE4436727A1 (de) | 1996-04-18 |
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