DE1164752B - Damping device for rotor blades of centrifugal machines - Google Patents
Damping device for rotor blades of centrifugal machinesInfo
- Publication number
- DE1164752B DE1164752B DEK46317A DEK0046317A DE1164752B DE 1164752 B DE1164752 B DE 1164752B DE K46317 A DEK46317 A DE K46317A DE K0046317 A DEK0046317 A DE K0046317A DE 1164752 B DE1164752 B DE 1164752B
- Authority
- DE
- Germany
- Prior art keywords
- centrifugal machines
- wire
- blades
- damping device
- impeller
- 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
- 238000013016 damping Methods 0.000 title claims description 5
- 230000004308 accommodation Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
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
- F01D5/02—Blade-carrying members, e.g. rotors
- F01D5/04—Blade-carrying members, e.g. rotors for radial-flow machines or engines
- F01D5/043—Blade-carrying members, e.g. rotors for radial-flow machines or engines of the axial inlet- radial outlet, or vice versa, type
- F01D5/048—Form or construction
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Description
Dämpfungseinrichtung für Laufradschaufeln von Kreiselmaschinen Die Erfindung betrifft eine Einrichtung zur Dämpfung der Schwingungen der Laufradschaufeln von radial durchströmten Kreiselmaschinen.Damping device for impeller blades of centrifugal machines The The invention relates to a device for damping the vibrations of the impeller blades of centrifugal machines with radial flow.
Bei axial durchströmten Kreiselmaschinen hat man zur Dämpfung der Ausschläge von zu Schwingungen angeregten Laufschaufeln. durch Bohrungen in letztere Drähte eingezogen, deren Wirkung darauf beruht, daß sie sich während des Betriebes unter der Einwirkung der Fliehkraft an die Wand der Bohrungen anlegen und die Bewegungen der Schaufeln bremsen. Wichtig ist es hierbei im Sinne der Erzielung einer möglichst großen Reibungsarbeit offenbar, daß die Drähte in ihren Bohrungen während des Betriebes möglichst satt zur Anlage kommen. Außerdem sollte die Unterbringung solcher Drähte, insbesondere was die Herstellung der Bohrungen angeht, keine allzu großen Schwierigkeiten bieten.In the case of centrifugal machines with axial flow, one has to dampen the Deflections of moving blades excited to vibrate. by drilling in the latter Wires drawn in, the effect of which is based on the fact that they are during operation Apply to the wall of the holes under the action of centrifugal force and the movements brake the blades. It is important here in the sense of achieving one as possible large frictional work apparently that the wires in their holes during operation Come to the plant as full as possible. In addition, the accommodation of such wires, especially as far as the production of the bores is concerned, no great difficulties Offer.
Aufgabe der Erfindung ist es, auch bei Laufrädern von radial durchströmten Kreiselmaschinen unter möglichst weitgehender Erfüllung dieser vorgenannten Bedingungen solche Dämpfungsdrähte zu verwenden, eine Aufgabe, die erfindungsgemäß dadurch gelöst ist, daß die Bohrungen zur Aufnahme des Drahtringes so nahe an den freien Schaufelenden angebracht sind und so geneigt zu den Schaufelflächen verlaufen, daß sie leicht am Laufrad hergestellt werden können, und daß der eingezogene Draht vor und hinter jeder Bohrung eine aus der Bohrungsachse heraus in die allgemeine Umfangsrichtung überleitende Kröpfung aufweist.The object of the invention is, even with impellers with radial flow Centrifugal machines with the greatest possible fulfillment of these aforementioned conditions to use such damping wires, an object that is achieved according to the invention is that the holes for receiving the wire ring so close to the free blade ends are attached and so inclined to the blade surfaces that they are easy can be made on the impeller, and that the drawn-in wire in front of and behind each bore one out of the bore axis in the general circumferential direction has transitional cranking.
Bei Befolgung dieser Lehre bietet die Herstellung der Bohrungen auch nachträglich keine Schwierigkeiten. Die Drähte selbst kommen dadurch, daß sie im Bereich der Bohrungen in deren Achsrichtung ,verlaufen, mit Sicherheit während des Betriebes satt zur Anlage und sind zudem durch die Kröpfungen beiderseits der Bohrungen gegen zu starke, da überflüssige und unerwünschte Verschiebungen in Umfangsrichtung des Rades gesichert.If this teaching is followed, the production of the holes also offers no problems afterwards. The wires themselves come from being in the Area of the bores in their axial direction run, with certainty during the Busy with the system and are also due to the cranks on both sides of the holes against excessive, unnecessary and undesirable shifts in the circumferential direction of the wheel secured.
In der Zeichnung ist eine Ausführungsform der Erfindung beispielsweise dargestellt.In the drawing, an embodiment of the invention is for example shown.
A b b. 1 zeigt das radial von außen nach innen durchströmte Laufrad einer Strömungsmaschine mit axialem Austritt des Mediums in Draufsicht auf die Abströmseite; A b b. 2 zeigt ein solches Rad nach A b b. 1 teilweise und etwas vergrößert im abgewickelten Zylinderschnitt am Radius r. Bei dem dargestellten Laufrad gehen die Schaufeln 1 innen einstückig in die Laufradnabe 2 und über ihre gesamte radiale Erstreckung einstückig in eine Begrenzungsscheibe 3 über. Abströmseitig stehen die Schaufeln 1 frei und sind am Radius r zur Kleinhaltung von Schwingungsausschlägen der Schaufeln durch einen in Umfangsrichtung verlaufenden Draht 4 miteinander verbunden. Dieser Draht 4 ist, wie insbesondere aus A b b. 2 zu erkennen ist, in den ihn aufnehmenden Bohrungen lose gehalten. Vor und hinter jeder Bohrung weist er eine Kröpfung dergestalt auf, daß er im Bereich der Bohrung selbst in Achsrichtung letzterer verläuft und trotzdem die allgemeine Umfangsrichtung, in der der Draht verlaufen soll, eingehalten ist.A b b. 1 shows the impeller through which flow radially from the outside to the inside a turbomachine with an axial outlet of the medium in a plan view of the outflow side; A b b. 2 shows such a wheel according to A b b. 1 partially and somewhat enlarged in the unwound Cylinder section at radius r. In the illustrated impeller, the blades 1 go inside in one piece in the impeller hub 2 and over its entire radial extent in one piece in a limiting disk 3 over. The blades are on the downstream side 1 and are free at the radius r to keep the vibration deflections of the blades small connected to one another by a wire 4 running in the circumferential direction. This Wire 4 is, as in particular from A b b. 2 can be seen in the recording Bores held loosely. In front of and behind each hole it has a crank of this type on that it runs in the area of the bore itself in the axial direction of the latter and Nevertheless, the general circumferential direction in which the wire should run is observed is.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEK46317A DE1164752B (en) | 1962-03-30 | 1962-03-30 | Damping device for rotor blades of centrifugal machines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEK46317A DE1164752B (en) | 1962-03-30 | 1962-03-30 | Damping device for rotor blades of centrifugal machines |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE1164752B true DE1164752B (en) | 1964-03-05 |
Family
ID=7224152
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DEK46317A Pending DE1164752B (en) | 1962-03-30 | 1962-03-30 | Damping device for rotor blades of centrifugal machines |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE1164752B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4060337A (en) * | 1976-10-01 | 1977-11-29 | General Motors Corporation | Centrifugal compressor with a splitter shroud in flow path |
| US5984638A (en) * | 1994-08-12 | 1999-11-16 | Elliott Turbomachinery Co., Inc. | Turbomachine radial impeller vibration constraining and damping mechanism |
| DE10220097A1 (en) * | 2002-05-04 | 2003-11-13 | Daimler Chrysler Ag | Turbine for exhaust turbo charger for motor vehicles, has turbine blades with bores containing connecting damper wires to prevent turbine fractures and bearing failures |
| DE19707558B4 (en) * | 1997-02-26 | 2006-07-27 | Voith Turbo Gmbh & Co. Kg | Paddle wheel for a hydrodynamic machine |
| FR3057904A1 (en) * | 2016-10-20 | 2018-04-27 | Safran Aircraft Engines | IMPROVED DAMPING DEVICE FOR TURBOMACHINE COMPRESSOR |
-
1962
- 1962-03-30 DE DEK46317A patent/DE1164752B/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4060337A (en) * | 1976-10-01 | 1977-11-29 | General Motors Corporation | Centrifugal compressor with a splitter shroud in flow path |
| US5984638A (en) * | 1994-08-12 | 1999-11-16 | Elliott Turbomachinery Co., Inc. | Turbomachine radial impeller vibration constraining and damping mechanism |
| DE19707558B4 (en) * | 1997-02-26 | 2006-07-27 | Voith Turbo Gmbh & Co. Kg | Paddle wheel for a hydrodynamic machine |
| DE10220097A1 (en) * | 2002-05-04 | 2003-11-13 | Daimler Chrysler Ag | Turbine for exhaust turbo charger for motor vehicles, has turbine blades with bores containing connecting damper wires to prevent turbine fractures and bearing failures |
| FR3057904A1 (en) * | 2016-10-20 | 2018-04-27 | Safran Aircraft Engines | IMPROVED DAMPING DEVICE FOR TURBOMACHINE COMPRESSOR |
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