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DE1164752B - Damping device for rotor blades of centrifugal machines - Google Patents

Damping device for rotor blades of centrifugal machines

Info

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
Application number
DEK46317A
Other languages
German (de)
Inventor
Dr Martin Feldinger
Guenter Matusche
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.)
Kloeckner Humboldt Deutz AG
Original Assignee
Kloeckner Humboldt Deutz 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 Kloeckner Humboldt Deutz AG filed Critical Kloeckner Humboldt Deutz AG
Priority to DEK46317A priority Critical patent/DE1164752B/en
Publication of DE1164752B publication Critical patent/DE1164752B/en
Pending legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01DNON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D5/00Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/02Blade-carrying members, e.g. rotors
    • F01D5/04Blade-carrying members, e.g. rotors for radial-flow machines or engines
    • F01D5/043Blade-carrying members, e.g. rotors for radial-flow machines or engines of the axial inlet- radial outlet, or vice versa, type
    • F01D5/048Form or construction
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01DNON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D5/00Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/12Blades
    • F01D5/22Blade-to-blade connections, e.g. for damping vibrations
    • F01D5/24Blade-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)

Patentanspruch: Einrichtung zur Dämpfung der Schwingungen der Laufradschaufeln von radial durchströmten Kreiselmaschinen, dadurch gekennzeichnet, daß an den freistehenden Schaufelenden, wie an sich bei axial durchströmten Kreiselmaschinen bekannt, in Bohrungen der Schaufeln ein in diesen Bohrungen lose gehender, zu einem Ring geschlossener Draht eingezogen ist, daß ferner die Bohrungen zur Aufnahme des Drahtringes so nahe den Schaufelenden angebracht sind und so geneigt zu den Schaufelflächen verlaufen, daß sie am zusammengebauten Laufrad hergestellt werden können, und da.ß der eingezogene dämpfende Draht vor und hinter jeder Bohrung eine aus der Bohrungsachse heraus in die allgemeine Umfangsrichtung überleitende Kröpfung aufweist.Claim: Device for damping the vibrations of the impeller blades of centrifugal machines with radial flow, characterized in that the free-standing Blade ends, as is known per se in centrifugal machines with axial flow, in Bores of the blades one loosely going in these bores, closed to form a ring Wire is drawn in that furthermore the holes for receiving the wire ring so close are attached to the blade ends and are inclined to the blade surfaces, that they can be made on the assembled impeller, and that the retracted one dampening wire in front of and behind each hole, one out of the hole axis has the general circumferential direction transitioning crank.
DEK46317A 1962-03-30 1962-03-30 Damping device for rotor blades of centrifugal machines Pending DE1164752B (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (5)

* Cited by examiner, † Cited by third party
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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