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EP0514677B1 - Prewhirl adjuster for centrifugal pumps - Google Patents

Prewhirl adjuster for centrifugal pumps Download PDF

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Publication number
EP0514677B1
EP0514677B1 EP92106894A EP92106894A EP0514677B1 EP 0514677 B1 EP0514677 B1 EP 0514677B1 EP 92106894 A EP92106894 A EP 92106894A EP 92106894 A EP92106894 A EP 92106894A EP 0514677 B1 EP0514677 B1 EP 0514677B1
Authority
EP
European Patent Office
Prior art keywords
guide vanes
housing
adjusting device
pin
bearing
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
Application number
EP92106894A
Other languages
German (de)
French (fr)
Other versions
EP0514677A3 (en
EP0514677A2 (en
Inventor
Ludwig Dipl.-Ing. Kiefer
Jörg Dipl.-Ing. Löw
Horst Dipl.-Ing. Lottermoser
Kurt Dipl.-Ing. Müller
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.)
Halberg Maschinenbau GmbH
Original Assignee
Halberg Maschinenbau GmbH
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Publication date
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Application filed by Halberg Maschinenbau GmbH filed Critical Halberg Maschinenbau GmbH
Priority to AT92106894T priority Critical patent/ATE102297T1/en
Publication of EP0514677A2 publication Critical patent/EP0514677A2/en
Publication of EP0514677A3 publication Critical patent/EP0514677A3/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/52—Casings; Connections of working fluid for axial pumps
    • F04D29/54—Fluid-guiding means, e.g. diffusers
    • F04D29/56—Fluid-guiding means, e.g. diffusers adjustable
    • F04D29/566—Fluid-guiding means, e.g. diffusers adjustable specially adapted for liquid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • F04D29/46—Fluid-guiding means, e.g. diffusers adjustable
    • F04D29/466—Fluid-guiding means, e.g. diffusers adjustable especially adapted for liquid fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/64—Mounting; Assembling; Disassembling of axial pumps
    • F04D29/648—Mounting; Assembling; Disassembling of axial pumps especially adapted for liquid pumps

Definitions

  • each guide vane is overhung by a pin which is sealed through the housing of the flow channel containing the guide vanes and is rigidly supported in a bearing located outside the housing and is connected to an adjusting device.
  • This arrangement has the disadvantage that the blades are susceptible to vibration and the bearings, pins and seals have to be dimensioned very strongly and that large adjustment forces occur.
  • the bearings must be rigidly and precisely connected to the housing in the radial direction.
  • the guide vanes are not only supported with their outer end on the housing, but also at their central end on a hub which is fixedly arranged in the center of the channel and carries the bearing devices for the guide vane ends (GB-A-671607; GB-A146452 ; DE-A-2447891).
  • the two-sided mounting of the guide vanes is rarely encountered because this increases the problems associated with the assembly, disassembly and maintenance of the guide vanes.
  • known pumps it is usually necessary to disassemble the housing in order to gain access to the guide vanes and to be able to replace them.
  • the invention has for its object to provide a swirl controller for centrifugal pumps according to the preamble of claim 1, which allows easier assembly and disassembly of the guide vanes with limited storage effort.
  • the solution was found in the characterizing features of claim 1.
  • the guide vane bearing on the housing need neither absorb large forces nor be particularly aligned. This opens up the possibility of arranging them on a cover piece which closes an opening in the housing jacket which is appropriate to the cross-sectional size of the guide vane. This in turn creates the possibility of removing or installing the guide vane through the housing for maintenance purposes.
  • the arrangement of the bearing on the cover also increases the possibility of escape errors, which are neutralized in that at least the bearing provided on the housing for the guide vane pin (possibly including the associated seals) is designed to be escape-error-tolerant. The level of accuracy in the manufacture and assembly of the bearings and covers is considerably reduced.
  • Escape error tolerance is less critical on the hub-side bearing of the guide vanes, because on the one hand the tolerances caused by the cover construction are practically not expressed in misalignments, and on the other hand the hub-side bearing can generally be short and simple and is less sensitive to escape errors anyway.
  • the adjustment device can comprise a roller-mounted ring for the joint adjustment of the guide vanes.
  • a roller-mounted ring for the joint adjustment of the guide vanes.
  • an actuating gear with a continuous drive shaft is used in the adjusting device.
  • This has the advantage that a continuous drive shaft can be used if several swirl regulators are arranged one behind the other (for example for the different stages of a pump arrangement). This is in a particularly close relationship with the aforementioned features of the invention, because only through this the adjusting forces are reduced so much that the drive shaft can be made so thin that a continuous arrangement is advantageous and an extremely small drive motor is required.
  • the adjusting device comprises a self-locking actuating gear with a large transmission ratio. Not only the large gear ratio helps to reduce the Driving forces and thus the dimensions of the drive shaft, but also the self-locking property of the actuating gear, since no holding forces need to be absorbed by the drive shaft.
  • a transmission of the type of sliding wedge transmission is particularly advantageous.
  • the pump housing appearing in FIG. 1 contains two pump stages 1, each of which is preceded by swirl regulator 2.
  • the housing 3 contains a number of slot-shaped mounting openings 6, evenly distributed over the circumference, each of which is tightly closed by a cover 7. Their number and arrangement corresponds to the number and arrangement of guide vanes 8, which are provided essentially radially within the flow channel. Their size is sufficient for the assembly and disassembly of the blades.
  • the blades 8 At their center-near end, the blades 8 have a bearing journal 9 which is mounted in a bearing 10 formed in the hub 4.
  • the guide vanes 8 are rigidly connected to a guide vane pin 11, which is guided through a sealing and bearing arrangement 12, which is arranged tightly in the cover 7. It comprises a bearing 13 with spherical surfaces, a grease-filled sealing section on the medium side 14 and an atmosphere-side seal 15.
  • the sealing section 14 has a relatively large play in order to allow misalignment of the guide vane pin 11.
  • the bearing 13 is insensitive to misalignments.
  • the entire sealing and bearing device 12 and the pin 11 can be dimensioned relatively light because the guide vane is not overhung.
  • the adjusting device comprises an actuating lever 16 engaging the pin 11, which can be pivoted from an adjusting ring 17 via a link 18.
  • the adjusting ring 17, which is composed of two partial rings 19, 20, is rotatably mounted on the housing 3 by means of the rolling elements 21. It connects the control levers 16 of all guide vanes so that they are always adjusted simultaneously and by the same amounts.
  • the position of the adjusting ring 17 is determined via a link 22 from the position of a lever 23, which is the output member of an actuating gear 24, which is fastened to the housing 3 parallel to the axis and, in the exemplary embodiment, is formed by the sliding wedge gear mentioned above.
  • Its drive shaft 25 is continuous. This means that in a series arrangement of several swirl regulators, as indicated in FIG. 1, only one drive shaft train needs to be provided, because the output end 26 of the drive shaft of an upstream transmission 27 can be connected to the input end 28 of the downstream transmission 29.
  • the gearbox has a large transmission ratio (for example 1:85) and is self-locking, so that the drive shaft can be designed easily and can contain joint pieces without any significant effort.
  • the gears are filled with grease and sealed, so that the entire arrangement can be arranged below the liquid level if necessary.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Reciprocating Pumps (AREA)
  • Control Of Non-Positive-Displacement Pumps (AREA)
  • Preliminary Treatment Of Fibers (AREA)

Abstract

Prewhirl adjuster (2) for centrifugal pumps having a flow channel enclosed by a casing (3) and a plurality of guide vanes (8) arranged essentially radially in said channel. Each of said guide vanes is doubly supported, namely on a centrally arranged hub (4) and on a pin (11) passing through the casing (3), which pin is also engaged by an adjusting device. The guide vanes (8) can be mounted radially through the casing (3), by providing for each guide vane an extraction slot (6) which is closed by a cover (7), which carries the seal (15) and the bearing (13) for the guide vane pin (11), which are designed so as to be alignment error-tolerant. For adjustment purposes, a self-locking geared rotary actuator (24) having a high gear ratio and a straight-through drive shaft (25) is provided. <IMAGE>

Description

Es ist bekannt (DE-PS 1 116 973; DE-OS 27 47 093), die Leitschaufeln eines Vordrallreglers für Kreiselpumpen zur Anpassung an unterschiedliche Betriebsverhältnisse verstellbar zu machen. Zu diesem Zweck ist jede Leitschaufel von einem Zapfen fliegend getragen, der abgedichtet durch das Gehäuse des die Leitschaufeln enthaltenden Strömungskanals geführt und in einem außerhalb des Gehäuses befindlichen Lager starr gelagert und mit einer Verstellvorrichtung verbunden ist. Diese Anordnung hat den Nachteil, daß die Schaufeln schwingungsanfällig sind und die Lager, Zapfen und Dichtungen sehr stark dimensioniert werden müssen und daß große Verstellkräfte auftreten. Die Lager müssen starr und genau in Radialrichtung mit dem Gehäuse verbunden sein. Dies kann man vermeiden, wenn man die Leitschaufeln nicht nur mit ihrem äußeren Ende am Gehäuse, sondern auch an ihrem zentrumsnahen Ende an einer in Kanalmitte fest angeordneten Nabe lagert, die die Lagereinrichtungen für die Leitschaufelenden trägt (GB-A-671607; GB-A146452; DE-A-2447891). In der Praxis begegnet die beidendige Lagerung der Leitschaufeln aber selten, weil dadurch die Probleme, die ohnehin mit der Montage, Demontage und Wartung der Leitschaufeln verbunden sind, noch vergrößert werden. Bei bekannten Pumpen ist es nämlich in der Regel erforderlich, das Gehäuse zu demontieren, um Zugang zu den Leitschaufeln zu erhalten und diese austauschen zu können. Zwar ist es bekannt (GB-A-2201732) im Gehäuse einer Gasturbine am Umfang des Verdichterläufers eine mittels eines Deckels verschließbare Montageöffnung vorzusehen, durch welche die an der Welle befestigten Verdichterschaufeln, wenn sie sich in geeigneter Winkelstellung befinden, einzeln entnommen werden können. Dabei herrschen jedoch andere Voraussetzungen als im Falle der vorliegenden Erfindung, weil lediglich eine Montageöffnung für sämtliche Schaufeln erforderlich ist, und diese auch nicht am Gehäuse angeordnet und nicht verstellbar sind.It is known (DE-PS 1 116 973; DE-OS 27 47 093) to make the guide vanes of a pre-swirl regulator adjustable for centrifugal pumps to adapt to different operating conditions. For this purpose, each guide vane is overhung by a pin which is sealed through the housing of the flow channel containing the guide vanes and is rigidly supported in a bearing located outside the housing and is connected to an adjusting device. This arrangement has the disadvantage that the blades are susceptible to vibration and the bearings, pins and seals have to be dimensioned very strongly and that large adjustment forces occur. The bearings must be rigidly and precisely connected to the housing in the radial direction. This can be avoided if the guide vanes are not only supported with their outer end on the housing, but also at their central end on a hub which is fixedly arranged in the center of the channel and carries the bearing devices for the guide vane ends (GB-A-671607; GB-A146452 ; DE-A-2447891). In practice, however, the two-sided mounting of the guide vanes is rarely encountered because this increases the problems associated with the assembly, disassembly and maintenance of the guide vanes. In known pumps it is usually necessary to disassemble the housing in order to gain access to the guide vanes and to be able to replace them. It is known (GB-A-2201732) to provide in the housing of a gas turbine on the circumference of the compressor rotor a closable mounting opening by means of a cover, through which the compressor blades attached to the shaft, if they are in a suitable angular position, can be removed individually. However, there are other requirements than in the case of the present invention, because only one assembly opening is required for all blades, and these are also not arranged on the housing and are not adjustable.

Der Erfindung liegt die Aufgabe zugrunde, einen Drallregler für Kreiselpumpen gemäß Oberbegriff des Anspruchs 1 zu schaffen, der bei begrenztem Lagerungsaufwand eine leichtere Montage und Demontage der Leitschaufeln ermöglicht. Die Lösung wurde in den kennzeichnenden Merkmalen des Anspruchs 1 gefunden.The invention has for its object to provide a swirl controller for centrifugal pumps according to the preamble of claim 1, which allows easier assembly and disassembly of the guide vanes with limited storage effort. The solution was found in the characterizing features of claim 1.

Dank der Lagerung der Leitschaufeln an beiden Enden braucht die gehäuseseitige Leitschaufellagerung weder große Kräfte aufzunehmen noch sonderlich ausgerichtet zu sein. Dies eröffnet die Möglichkeit, sie an einem Deckelstück anzuordnen, das eine der Querschnittsgröße der Leitschaufel angemessene Öffnung im Gehäusemantel schließt. Dies wiederum schafft die Möglichkeit, die Leitschaufel durch das Gehäuse hindurch zu Wartungszwecken zu entnehmen bzw. zu montieren. Andererseits vergrößert die Anordnung des Lagers an dem Deckel auch die Fluchtfehlermöglichkeiten, die dadurch neutralisiert werden, daß wenigstens das am Gehäuse für den Leitschaufelzapfen vorgesehene Lager (ggf. einschl. der zugehörigen Dichtungen) fluchtfehlertolerant ausgebildet wird. Der Genauigkeitsaufwand bei der Herstellung und Montage der Lager und Deckel wird dabei beträchtlich vermindert.Thanks to the bearing of the guide vanes at both ends, the guide vane bearing on the housing need neither absorb large forces nor be particularly aligned. This opens up the possibility of arranging them on a cover piece which closes an opening in the housing jacket which is appropriate to the cross-sectional size of the guide vane. This in turn creates the possibility of removing or installing the guide vane through the housing for maintenance purposes. On the other hand, the arrangement of the bearing on the cover also increases the possibility of escape errors, which are neutralized in that at least the bearing provided on the housing for the guide vane pin (possibly including the associated seals) is designed to be escape-error-tolerant. The level of accuracy in the manufacture and assembly of the bearings and covers is considerably reduced.

Fluchtfehlertoleranz ist an dem nabenseitigen Lager der Leitschaufeln weniger kritisch, da zum einen sich die durch die Deckelkonstruktion verursachten Toleranzen praktisch nicht in Fluchtfehlern äußern und zum anderen das nabenseitige Lager in der Regel kurz und einfach ausgeführt sein kann und dabei ohnehin weniger fluchtfehlerempfindlich ist.Escape error tolerance is less critical on the hub-side bearing of the guide vanes, because on the one hand the tolerances caused by the cover construction are practically not expressed in misalignments, and on the other hand the hub-side bearing can generally be short and simple and is less sensitive to escape errors anyway.

Wie an sich bekannt (US-A-2606713), kann die Verstellvorrichtung einen wälzgelagerten Ring zur gemeinsamen Verstellung der Leitschaufeln umfassen. Bei Flüssigkeitspumpen wurde eine solche Maßnahme bislang nicht angewandt, da sie keine wesentliche Verbesserung bringen könnte, weil hohe Reibkräfte an den Lagern und Dichtungen auftreten. Hingegen werden dadurch im Zusammenhang mit der Erfindung, bei der die Lager- und Dichtungskräfte geringer sind, die Verstellkräfte weiter vermindert.As known per se (US-A-2606713), the adjustment device can comprise a roller-mounted ring for the joint adjustment of the guide vanes. Such a measure has so far not been applied to liquid pumps because it could not bring about any significant improvement because high frictional forces occur on the bearings and seals. In contrast, the adjustment forces are further reduced in connection with the invention, in which the bearing and sealing forces are lower.

Nach einem besonderen Merkmal der Erfindung wird in der Verstellvorrichtung ein Stellgetriebe mit durchgehender Antriebswelle verwendet. Dies hat den Vorteil, daß bei Anordnung mehrerer Drallregler hintereinander (beispielsweise für die unterschiedlichen Stufen einer Pumpenanordnung) eine durchgehende Antriebswelle eingesetzt werden kann. Dies steht mit dem zuvor genannten Merkmalen der Erfindung deshalb in einem besonders engen Verhältnis, weil erst durch diese die Verstellkräfte so stark reduziert werden, daß die Antriebswelle so dünn ausgeführt werden kann, daß eine durchgehende Anordnung vorteilhaft ist und ein extrem kleiner Antriebsmotor erforderlich ist. Jedoch verdient dieses Merkmal ggf. auch Schutz unabhängig von den zuvor genannten Merkmalen, insbesondere in Verbindung mit dem weiteren Erfindungsmerkmal, daß die Verstellvorrichtung ein selbstsperrendes Stellgetriebe mit großem Übersetzungsverhältnis umfaßt. Nicht nur das große Übersetzungsverhältnis trägt zur Reduzierung der Antriebskräfte und damit der Dimensionen der Antriebswelle bei, sondern auch die selbstsperrende Eigenschaft des Stellgetriebes, da keine Haltekräfte von der Antriebswelle aufgenommen zu werden brauchen. Besonders vorteilhaft ist ein Getriebe vom Typ der Gleitkeilgetriebe.According to a special feature of the invention, an actuating gear with a continuous drive shaft is used in the adjusting device. This has the advantage that a continuous drive shaft can be used if several swirl regulators are arranged one behind the other (for example for the different stages of a pump arrangement). This is in a particularly close relationship with the aforementioned features of the invention, because only through this the adjusting forces are reduced so much that the drive shaft can be made so thin that a continuous arrangement is advantageous and an extremely small drive motor is required. However, this feature also deserves protection regardless of the features mentioned above, in particular in connection with the further feature of the invention, that the adjusting device comprises a self-locking actuating gear with a large transmission ratio. Not only the large gear ratio helps to reduce the Driving forces and thus the dimensions of the drive shaft, but also the self-locking property of the actuating gear, since no holding forces need to be absorbed by the drive shaft. A transmission of the type of sliding wedge transmission is particularly advantageous.

Die Erfindung wird im folgenden näher unter Bezugnahme auf die Zeichnung erläutert, die ein vorteilhaftes Ausführungsbeispiel veranschaulicht. Darin zeigen:

Fig. 1
eine Gesamtansicht einer zweistufigen Pumpenanordnung,
Fig. 2
einen Längsschnitt durch einen Drallregler dafür,
Fig. 3
eine Ansicht des Drallreglers in Richtung "X" und
Fig. 4
eine Teilansicht in Richtung "Z" der Fig. 2
The invention is explained in more detail below with reference to the drawing, which illustrates an advantageous embodiment. In it show:
Fig. 1
an overall view of a two-stage pump arrangement,
Fig. 2
a longitudinal section through a swirl controller for this,
Fig. 3
a view of the swirl controller in the direction "X" and
Fig. 4
3 shows a partial view in the direction "Z" of FIG. 2

Das in Fig. 1 erscheinende Pumpengehäuse enthält zwei Pumpenstufen 1, denen jeweils Drallregler 2 vorgeschaltet sind. Deren vorzugsweise im Querschnitt kreisförmig begrenztes Gehäuse 3 enthält eine ungeteilte, hohle Nabe 4, die mittels radialer Streben in der ersten Pumpenstufe vom Gehäuse 3 bzw. von der Leitradnabe der Pumpenstufe starr gehalten ist und durch deren Mittelbohrung die Pumpenwelle 5 hindurchgeführt ist.The pump housing appearing in FIG. 1 contains two pump stages 1, each of which is preceded by swirl regulator 2. The housing 3, which is preferably circular in cross section, contains an undivided, hollow hub 4, which is held rigidly by means of radial struts in the first pump stage from the housing 3 or from the stator hub of the pump stage and through whose central bore the pump shaft 5 is guided.

Das Gehäuse 3 enthält gleichmäßig verteilt über den Umfang eine Anzahl von schlitzförmigen Montageöffnungen 6, die jeweils von einem Deckel 7 dicht geschlossen sind. Ihre Zahl und Anordnung entspricht der Zahl und Anordnung von Leitschaufeln 8, die im wesentlichen radial innerhalb des Strömungskanals vorgesehen sind. Ihre Größe ist für die Montage und Demontage der Schaufeln ausreichend bemessen. An ihrem zentrumsnahen Ende weisen die Schaufeln 8 einen Lagerzapfen 9 auf, der in einem in der Nabe 4 gebildeten Lager 10 gelagert ist. An ihrem äußeren Ende sind die Leitschaufeln 8 mit einem Leitschaufelzapfen 11 starr verbunden, der durch eine Dichtungs- und Lageranordnung 12 geführt ist, die dicht in dem Deckel 7 angeordnet ist. Sie umfaßt ein Lager 13 mit sphärischen Flächen, eine mediumsseitige, fettgefüllte Dichtstrecke 14 und eine atmosphärenseitige Dichtung 15. Die Dichtstrecke 14 weist ein verhältnismäßig großes Spiel auf, um Fluchtfehler des Leitschaufelzapfens 11 zulassen zu könne. Desgleichen ist das Lager 13 fluchtfehlerunempfindlich. Die ganze Dichtungs- und Lagereinrichtung 12 sowie der Zapfen 11 können verhältnismäßig leicht dimensioniert sein, weil die Leitschaufel nicht fliegend gelagert ist.The housing 3 contains a number of slot-shaped mounting openings 6, evenly distributed over the circumference, each of which is tightly closed by a cover 7. Their number and arrangement corresponds to the number and arrangement of guide vanes 8, which are provided essentially radially within the flow channel. Their size is sufficient for the assembly and disassembly of the blades. At their center-near end, the blades 8 have a bearing journal 9 which is mounted in a bearing 10 formed in the hub 4. At their outer end, the guide vanes 8 are rigidly connected to a guide vane pin 11, which is guided through a sealing and bearing arrangement 12, which is arranged tightly in the cover 7. It comprises a bearing 13 with spherical surfaces, a grease-filled sealing section on the medium side 14 and an atmosphere-side seal 15. The sealing section 14 has a relatively large play in order to allow misalignment of the guide vane pin 11. Likewise, the bearing 13 is insensitive to misalignments. The entire sealing and bearing device 12 and the pin 11 can be dimensioned relatively light because the guide vane is not overhung.

Die Verstellvorrichtung umfaßt einen am Zapfen 11 angreifenden Stellhebel 16, der von einem Stellring 17 her über einen Lenker 18 verschwenkbar ist. Der Stellring 17, der aus zwei Teilringen 19, 20 zusammengesetzt ist, ist mittels der Wälzkörper 21 am Gehäuse 3 drehbar gelagert. Er verbindet die Stellhebel 16 sämtlicher Leitschaufeln, so daß diese stets gleichzeitig und um gleiche Beträge verstellt werden.The adjusting device comprises an actuating lever 16 engaging the pin 11, which can be pivoted from an adjusting ring 17 via a link 18. The adjusting ring 17, which is composed of two partial rings 19, 20, is rotatably mounted on the housing 3 by means of the rolling elements 21. It connects the control levers 16 of all guide vanes so that they are always adjusted simultaneously and by the same amounts.

Die Stellung des Stellrings 17 wird über einen Lenker 22 von der Stellung eines Hebels 23 bestimmt, der das Ausgangsglied eines Stellgetriebes 24 ist, das achsparallel am Gehäuse 3 befestigt ist und im Ausführungsbeispiel von dem oben bereits erwähnten Gleitkeilgetriebe gebildet ist. Seine Antriebswelle 25 ist durchgehend ausgebildet. Das bedeutet, daß bei einer Reihenanordnung mehrerer Drallregler, wie sie in Fig. 1 angedeutet ist, lediglich ein Antriebswellenstrang vorgesehen zu werden braucht, weil das Ausgangsende 26 der Antriebswelle eines vorgeordneten Getriebes 27 mit dem Eingangsende 28 des nachgeordneten Getriebes 29 verbunden werden kann.The position of the adjusting ring 17 is determined via a link 22 from the position of a lever 23, which is the output member of an actuating gear 24, which is fastened to the housing 3 parallel to the axis and, in the exemplary embodiment, is formed by the sliding wedge gear mentioned above. Its drive shaft 25 is continuous. This means that in a series arrangement of several swirl regulators, as indicated in FIG. 1, only one drive shaft train needs to be provided, because the output end 26 of the drive shaft of an upstream transmission 27 can be connected to the input end 28 of the downstream transmission 29.

Das Getriebe hat ein großes Übersetzungsverhältnis (beispielsweise 1:85) und ist selbstsperrend, so daß die Antriebswelle leicht ausgeführt werden kann und ohne nennenswerten Aufwand Gelenkstücke enthalten kann. Die Getriebe sind fettgefüllt und abgedichtet, so daß die ganze Anordnung ggf. unterhalb des Flüssigkeitsspiegels angeordnet werden kann.The gearbox has a large transmission ratio (for example 1:85) and is self-locking, so that the drive shaft can be designed easily and can contain joint pieces without any significant effort. The gears are filled with grease and sealed, so that the entire arrangement can be arranged below the liquid level if necessary.

Claims (4)

  1. A swirl controller for centrifugal pumps having a flow passage enclosed by a housing and a plurality of guide vanes (8) which are arranged substantially radially therein and in each case with one end mounted on the housing (3) and with the other end mounted on a fixed hub (4), and also having an adjusting device for the guide vanes, characterised in that the mounting on the housing side is disposed on a cover member (7), which closes an opening (6) in the housing (3) corresponding to the cross-sectional dimension of the guide vanes (8), and is adapted to be tolerant of alignment errors.
  2. A swirl controller according to Claim 1, characterised in that the adjusting device comprises a rolling-bearing mounted ring (17) for the common adjustment of the guide blades (8).
  3. A swirl controller according to Claim 1 or 2, characterised in that the adjusting device comprises an actuating mechanism (24) with a drive shaft (25) passing therethrough.
  4. A swirl controller according to any one of Claims 1 to 3, characterised in that the adjusting device comprises a self-locking actuating mechanism (24) with a high transmission ratio.
EP92106894A 1991-05-24 1992-04-22 Prewhirl adjuster for centrifugal pumps Expired - Lifetime EP0514677B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT92106894T ATE102297T1 (en) 1991-05-24 1992-04-22 SLIVER REGULATOR FOR CENTRIFUGAL PUMPS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4117025 1991-05-24
DE4117025A DE4117025A1 (en) 1991-05-24 1991-05-24 SWIRL REGULATOR FOR CENTRIFUGAL PUMPS

Publications (3)

Publication Number Publication Date
EP0514677A2 EP0514677A2 (en) 1992-11-25
EP0514677A3 EP0514677A3 (en) 1992-12-16
EP0514677B1 true EP0514677B1 (en) 1994-03-02

Family

ID=6432358

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92106894A Expired - Lifetime EP0514677B1 (en) 1991-05-24 1992-04-22 Prewhirl adjuster for centrifugal pumps

Country Status (7)

Country Link
US (1) US5269649A (en)
EP (1) EP0514677B1 (en)
JP (1) JPH05149299A (en)
KR (1) KR920021874A (en)
AT (1) ATE102297T1 (en)
DE (2) DE4117025A1 (en)
ES (1) ES2051604T3 (en)

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US6205779B1 (en) 1999-03-31 2001-03-27 Daimlerchrysler Corporation Integral hub driven gears
US6357228B1 (en) 1999-03-31 2002-03-19 Daimlerchrysler Corporation Sleeveless support of pump gear drive
EP1719887A1 (en) * 2005-05-04 2006-11-08 ABB Turbo Systems AG Charging control of a combustion engine
US7628578B2 (en) 2005-09-12 2009-12-08 Pratt & Whitney Canada Corp. Vane assembly with improved vane roots
US7530782B2 (en) * 2005-09-12 2009-05-12 Pratt & Whitney Canada Corp. Foreign object damage resistant vane assembly
US7637718B2 (en) * 2005-09-12 2009-12-29 Pratt & Whitney Canada Corp. Vane assembly with outer grommets
US7413400B2 (en) * 2005-09-12 2008-08-19 Pratt & Whitney Canada Corp. Vane assembly with grommet
EP2370192A1 (en) * 2008-11-27 2011-10-05 Basf Se Apparatus for separation by distillation
US8696311B2 (en) 2011-03-29 2014-04-15 Pratt & Whitney Canada Corp. Apparatus and method for gas turbine engine vane retention
FR3019855B1 (en) * 2014-04-14 2016-04-01 Airbus Operations Sas AIRCRAFT PROPULSIVE ASSEMBLY COMPRISING A VARIABLE FLOW AIR VALVE
DE112015004006T5 (en) * 2014-10-07 2017-06-08 Borgwarner Inc. BYPASS VALVE FOR COMPRESSOR
CN105782122B (en) * 2016-04-01 2018-02-27 江苏大学 A kind of adjuster for being used to automatically adjust axial pump vane blade angle
CN105927588B (en) * 2016-04-29 2019-09-13 沈阳透平机械股份有限公司 Booster compressor inlet guide vane regulating device and method
CN114109843A (en) * 2021-12-15 2022-03-01 合肥恒大江海泵业股份有限公司 Bidirectional tubular pump with adjustable front guide vane
CN114483629B (en) * 2022-01-13 2023-07-28 江苏海拓宾未来工业科技集团有限公司 Multi-shaft multi-stage hydrogen fuel high-speed centrifugal compressor

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Also Published As

Publication number Publication date
KR920021874A (en) 1992-12-18
EP0514677A3 (en) 1992-12-16
JPH05149299A (en) 1993-06-15
DE4117025A1 (en) 1992-11-26
EP0514677A2 (en) 1992-11-25
ES2051604T3 (en) 1994-06-16
DE59200075D1 (en) 1994-04-07
US5269649A (en) 1993-12-14
ATE102297T1 (en) 1994-03-15

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