EP1967739B1 - Device for hydraulic adjustment of the rotor blades of a wheel of an axial ventilator - Google Patents

Device for hydraulic adjustment of the rotor blades of a wheel of an axial ventilator Download PDF

Info

Publication number
EP1967739B1
EP1967739B1 EP08002781A EP08002781A EP1967739B1 EP 1967739 B1 EP1967739 B1 EP 1967739B1 EP 08002781 A EP08002781 A EP 08002781A EP 08002781 A EP08002781 A EP 08002781A EP 1967739 B1 EP1967739 B1 EP 1967739B1
Authority
EP
European Patent Office
Prior art keywords
valve
valves
control
oil
way
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.)
Active
Application number
EP08002781A
Other languages
German (de)
French (fr)
Other versions
EP1967739A2 (en
EP1967739A3 (en
Inventor
André Annebique
Jörg Schmidt
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.)
TLT Turbo GmbH
Original Assignee
TLT Turbo GmbH
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=39339914&utm_source=***_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1967739(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by TLT Turbo GmbH filed Critical TLT Turbo GmbH
Priority to PL08002781T priority Critical patent/PL1967739T3/en
Publication of EP1967739A2 publication Critical patent/EP1967739A2/en
Publication of EP1967739A3 publication Critical patent/EP1967739A3/en
Application granted granted Critical
Publication of EP1967739B1 publication Critical patent/EP1967739B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • 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
    • F04D29/26—Rotors specially for elastic fluids
    • 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
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
    • F04D29/34—Blade mountings
    • F04D29/36—Blade mountings adjustable
    • F04D29/362—Blade mountings adjustable during rotation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
    • F04D27/008—Stop safety or alarm devices, e.g. stop-and-go control; Disposition of check-valves

Definitions

  • the invention relates to a device for the hydraulic adjustment of the blades of an impeller of an axial fan with the features of the preamble of claim 1.
  • Modern axial fans are controllable working machines that convert mechanical energy into flow energy.
  • the control of the axial fans via the speed or the angle of attack of the blades. If the blade position can be changed during operation, the blade must be mounted on a mounted shaft, the spar.
  • the change of the blade position is usually done hydraulically.
  • a hydraulic adjusting device is attached to the impeller of the axial fan.
  • Such an adjusting device consists essentially of a hydraulic adjusting cylinder, which rotates with the fan speed, and a stationary oil transition piece, to which the oil supply lines are connected.
  • From the DE 196 00 660 A1 is a hydraulically reversible Vestellpropeller unit for air, land and / or water vehicles with a propeller with at least two leaves known whose blade angle by means of a control unit (controller) is adjustable. There is no mechanical or electrical connection between the rotating propeller and the stationary control unit for the blade angle control.
  • a movable, adjustable and biased by springs stop is intended for the starting position (small increase). The stop is for adjusting the blade angle to the brake position (reverse) by means of a Hochdruckhydraulikfluids overcome and adjustable to a mechanical stop for the braking position (reverse) to produce a negative thrust.
  • the invention has for its object to make the generic device for adjusting blades during fan operation so that even with a power failure, the blade position in the previous last position can be maintained until another network control unit takes over the position control of the adjustment by a network switching.
  • a redundant control of the adjustment is provided.
  • the arrangement of the poppet valves upstream of the associated 4-way valves ensures that always only a 4-way valve performs the control of the hydraulic adjustment and a hydraulic short circuit between the parallel arranged redundant 4-way valves is excluded.
  • By the execution of the poppet valves as closing by spring force valves is additionally ensured that in case of failure of the respective power supply of the parallel drive units shut off the supply and return line to both the hydraulic adjustment and to the respective 4-way valve, whereby the respective blade position is held until the power supply is applied again.
  • FIG. 1 an impeller 1 of an axial fan is shown, which is equipped on its circumference with a plurality of blades 2, of which a blade is indicated.
  • the impeller is mounted on a shaft 18, which may be installed in both a separate main bearing and a drive motor.
  • the blades 2 are adjustable to adapt the axial fan to the various operating points about its longitudinal axis.
  • the blades 2 carrying Holm 3 is rotatably mounted in a support ring 4 of the impeller 1.
  • the impeller 1 is provided with an adjusting device for adjusting the rotor blades 2.
  • a cranked adjusting lever 5 is attached to each spar 3, which in a on the circumference in the Fig. 1a and 1b shown adjusting plate 17 mounted groove is guided.
  • the adjusting plate 17 is connected to a piston rod 8, on which a piston 7 is fixed.
  • the piston 7 is located within an adjusting cylinder 6.
  • the piston rod 8 with the piston 7 and the adjusting plate 17 are slidably disposed along the axis of the axial fan and rotate at the same speed as the impeller 1 and the adjusting 6th
  • a check valve 16 is additionally arranged in the oil transition piece, its importance will be discussed later.
  • test connection 20 permits the connection of test equipment to the supply line P by means of a quick coupling with a seat valve.
  • the supply line P is divided equally into two parallel branches P1 and P2 on the test side.
  • a manual shut-off valve 21, 31 is installed in the two branches P1 and P2 of the supply line P, which is preferably designed as a ball valve.
  • the check valves 21, 31 serve to be able to shut off the corresponding pressure leading supply line P to these valves in the case of replacement of subsequently arranged further valves.
  • the ventilator side of the shut-off valves 21, 31 each have a test port 22, 32 is provided.
  • Redundant is in each case the electromagnetically actuated 4-way valve 23, 33 installed in one of the branches P1 and P2 of the supply line P and one of the branches T1 and T2 of the return line T.
  • the 4-way valves 23, 33 are preferably designed as 4/3-way proportional control valves. On the fan side, the branches A1 and B1 of the control oil lines A, B are connected to the 4-way valve 23, while the branches A2 and B2 of the control oil lines A, B are guided on the fan side to the 4-way valve 33.
  • the seat valves 24, 25, 34, 35 are preferably designed as 2/2-way cone seat valves.
  • the seat valves 24, 25 serve as shut-off devices for the 4-way valve 23, and the seat valves 34, 35 serve as shut-off devices for the 4-way valve 33.
  • the seat valves 24, 25, 34, 35 are each electrically connected to the associated 4-way valves 23 , 33 coupled.
  • the built in the branches P1 / A1 and T1 / B1 valves namely 4-way valve 23 and seat valves 24, 25, and built in the branches P2 / A2 and T2 / B2 valves, namely 4-way valve 33 and seat valves 34, 35 are applied to different voltage sources.
  • the 4-way valves 23, 33 and the seat valves 24, 25, 34, 35 are each provided with a light-emitting diode 26 which is connected so that it lights up as long as the relevant valve is in operation.
  • a manual shut-off valve 27, 28, 37, 38 are installed after each of these, which is preferably designed as a ball valve, thus the replacement during operation with the redundant Unit without fluid pressure losses possible.
  • the adjusting cylinder 6 can be supplied by the branches P1 / A1 / T1 / B1 or by the branches P2 / A2 / T2 / B2 with the predetermined amounts of fluid, thereby realizing the desired adjustment.
  • the redundant control of the adjusting cylinder 6 is thus possible via either a 4-way valve 23 or the other 4-way valve 33.
  • the poppet valves 24, 25, 34, 35 close at voltage interruption spring actuated. Therefore, it can be switched without interrupting the operation between the two 4-way valves 23, 33 by changing the power supply. During the switching time no fluid flows to the adjusting cylinder 6 or from this.
  • a pressure limiting valve 29, 39 can be installed in the return lines T1, T2 leading to the tank connection.
  • a pressure relief valve 29, 39 is advantageous if in the control oil line B immediately before the port 15 of the oil transition piece 13 of the second chamber 12 of the adjusting 6, a check valve 16 is arranged.
  • the arranged check valve 16 is held by the pressure in the control oil line A in the open position. In case of failure or interruption of the pressure oil supply, the check valve 16 moves into the closed position. In the closed position of the check valve 16, the adjusting cylinder 6 remains in its previously assumed position. Thus, the connected via the piston rod 8 and the adjusting plate 17 and the spar 3 blade 2 can not turn, but remains in the assumed position.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

The device has a displacement cylinder (6) with a piston (7) between first and second chambers (11, 12) connected by control oil lines to a 4-way valve. Feed and return control oil lines are each divided into two parallel branches, two redundant 4-way valves are arranged in the parallel branches and seat valves are arranged between the connections (14,15) and the 4-way valves.

Description

Die Erfindung betrifft eine Vorrichtung zum hydraulischen Verstellen der Laufschaufeln eines Laufrades eines Axialventilators mit den Merkmalen des Oberbegriffes des Anspruches 1.The invention relates to a device for the hydraulic adjustment of the blades of an impeller of an axial fan with the features of the preamble of claim 1.

Moderne Axialventilatoren sind regelbare Arbeitsmaschinen, die mechanische Energie in Strömungsenergie umwandeln. Die Regelung der Axialventilatoren erfolgt über die Drehzahl oder die Anstellwinkel der Laufschaufeln. Soll die Laufschaufelstellung während des Betriebs verändert werden können, muss die Laufschaufel auf einer gelagerten Welle, dem Holm, befestigt sein. Die Veränderung der Laufschaufelstellung geschieht meistens hydraulisch. Zu dem Zweck wird eine hydraulische Verstellvorrichtung an das Laufrad des Axialventilators angebaut. Eine solche Verstellvorrichtung besteht im Wesentlichen aus einem hydraulischen Verstellzylinder, der mit der Ventilatordrehzahl rotiert, und aus einem stehenden Ölübergangsstück, an dem die Ölversorgungsleitungen angeschlossen sind.Modern axial fans are controllable working machines that convert mechanical energy into flow energy. The control of the axial fans via the speed or the angle of attack of the blades. If the blade position can be changed during operation, the blade must be mounted on a mounted shaft, the spar. The change of the blade position is usually done hydraulically. For this purpose, a hydraulic adjusting device is attached to the impeller of the axial fan. Such an adjusting device consists essentially of a hydraulic adjusting cylinder, which rotates with the fan speed, and a stationary oil transition piece, to which the oil supply lines are connected.

Aus der DE 196 00 660 A1 ist eine hydraulisch reversierbare Vestellpropeller-Einheit für Luft-, Land- und/oder Wasserfahrzeuge mit einem Propeller mit mindestens zwei Blättern bekannt, deren Blattwinkel mittels einer Steuereinheit (Regler) regelbar ist. Dabei besteht zwischen dem umlaufenden Propeller und der feststehenden Steuereinheit für die Blattwinkelansteuerung keine mechanische oder elektrische Verbindung. Ein bewegbarer, einstellbarer und mittels Federn vorgespannter Anschlag ist für die Startstellung (kleine Steigerung) vorgesehen. Der Anschlag ist zur Verstellung der Blattwinkel auf Bremsstellung (Reverse) mittels eines Hochdruckhydraulikfluids überwindbar und bis auf einen mechanischen Anschlag für die Bremsstellung (Reverse) verstellbar, um einen negativen Schub zu erzeugen.From the DE 196 00 660 A1 is a hydraulically reversible Vestellpropeller unit for air, land and / or water vehicles with a propeller with at least two leaves known whose blade angle by means of a control unit (controller) is adjustable. There is no mechanical or electrical connection between the rotating propeller and the stationary control unit for the blade angle control. A movable, adjustable and biased by springs stop is intended for the starting position (small increase). The stop is for adjusting the blade angle to the brake position (reverse) by means of a Hochdruckhydraulikfluids overcome and adjustable to a mechanical stop for the braking position (reverse) to produce a negative thrust.

weiterhin ist aus der DE 43 31 825 A1 ein Verfahren und eine Vorrichtung zur hydraulischen Verstellung auf Segelstellung eines Propellers ohne Gegengewichte eines Luftfahrzeuges bekannt, wobei die Druckbeaufschlagung der Verstellvorrichtung mittels eines Hydraulikfluids in Richtung einer Steigungswinkelerhöhung des Propellers und mittels einer Feder in entgegengesetzter Richtung einer Steigungswinkelverminderung des Propellers erfolgt.continues from the DE 43 31 825 A1 a method and a device for the hydraulic adjustment to feathered position of a propeller without counterweights of an aircraft known, wherein the pressurization of the adjustment by means of a hydraulic fluid in the direction of a pitch angle increase of the propeller and by means of a spring in the opposite direction of a pitch angle reduction of the propeller.

Aufgrund der durch die Rotation verursachten Fliehkräfte des Laufschaufelblattes entsteht, begünstigt durch die geometrische Form des Laufschaufelprofils, um die Längsachse des Holmes ein Drehmoment, welches als Rückstellmoment wirkt. Wenn die Verstellvorrichtung während des Betriebs ausfällt, so dreht die Laufschaufel, durch dieses Rückstellmoment verursacht, schlagartig zu und der Ventilator kann Druck und Fördermenge nicht mehr aufrechterhalten. Um ein Zudrehen der Laufschaufeln zu verhindern, können Gegengewichte an jeder Laufschaufel, meist aber an den Holmen, angebracht werden, die das Rückstellmoment mehr oder weniger genau kompensieren. Der Nachteil einer solchen Lösung ist, dass die zusätzlichen Gegengewichte aufgrund der Fliehkraft eine beträchtliche Mehrbelastung der Holmlagerung bewirken und das Laufrad deutlich schwerer machen.Due to the centrifugal forces caused by the rotation of the blade blade, favored by the geometric shape of the blade profile, around the longitudinal axis of the spar creates a torque which acts as a restoring moment. If the adjusting device fails during operation, the blade, caused by this restoring torque, abruptly and the fan can no longer maintain pressure and flow rate. In order to prevent the blades from rotating, counterweights can be attached to each blade, but usually to the spars, which more or less accurately compensate for the restoring torque. The disadvantage of such a solution is that the additional counterweights due to the centrifugal force cause a considerable increase in the burden on the bar bearing and make the impeller significantly heavier.

Der Erfindung liegt die Aufgabe zugrunde, die gattungsgemäße Vorrichtung zur Verstellung von Laufschaufeln während des Ventilatorbetriebes so zu gestalten, dass auch bei einem Spannungsausfall die Schaufelstellung in der davor letzten Stellung gehalten werden kann, bis durch eine Netzumschaltung eine andere Ansteuerungseinheit die Stellungsregelung der Verstelleinrichtung übernimmt.The invention has for its object to make the generic device for adjusting blades during fan operation so that even with a power failure, the blade position in the previous last position can be maintained until another network control unit takes over the position control of the adjustment by a network switching.

Die Aufgabe wird bei einer gattungsgemäßen Vorrichtung erfindungsgemäß durch die kennzeichnenden Merkmale des Anspruchs 1 gelöst. Vorteilhalte Ausgestaltungen der Erfindung sind Gegenstand der Unteransprüche.The object is achieved in a generic device according to the invention by the characterizing features of claim 1. Advantageous embodiments of the invention are the subject of the dependent claims.

Durch die Erfindung wird eine redundante Ansteuerung der Verstelleinrichtung zur Verfügung gestellt. Die Anordnung der Sitzventile stromaufwärts von den zugehörigen 4-Wegeventilen sorgt dafür, dass immer nur ein 4-Wegeventil die Ansteuerung der hydraulischen Verstelleinrichtung ausführt und ein hydraulischer Kurzschluss zwischen den parallel angeordneten redundanten 4-Wegeventilen ausgeschlossen ist. Durch die Ausführung der Sitzventile als durch Federkraft schließende Ventile wird zusätzlich sichergestellt, dass bei Ausfall der jeweiligen Spannungsversorgung der parallelen Ansteuereinheiten ein Absperren der Zu- und Rücklaufleitung sowohl zur hydraulischen Verstelleinrichtung als auch zu dem jeweiligen 4-Wegeventil erfolgt, wodurch die jeweilige Laufschaufelstellung festgehalten wird, bis die Spannungsversorgung wieder anliegt.By the invention, a redundant control of the adjustment is provided. The arrangement of the poppet valves upstream of the associated 4-way valves ensures that always only a 4-way valve performs the control of the hydraulic adjustment and a hydraulic short circuit between the parallel arranged redundant 4-way valves is excluded. By the execution of the poppet valves as closing by spring force valves is additionally ensured that in case of failure of the respective power supply of the parallel drive units shut off the supply and return line to both the hydraulic adjustment and to the respective 4-way valve, whereby the respective blade position is held until the power supply is applied again.

Mehrere Ausführungsbeispiele der Erfindung sind in der Zeichnung dargestellt und werden im Folgenden näher erläutert. Es zeigen:

Fig. 1a
einen Längsschnitt durch ein Laufrad eines Axialventilators mit einer Verstellvorrichtung nach der Erfindung,
Fig. 1b
einen Längsschnitt durch ein Laufrad eines Axialventilators mit einer Verstellvorrichtung gemäß einer anderen Ausführungsform,
Fig. 2a
ein Schaltbild für die Ansteuerung der Verstellvorrichtung nach Fig. 1a und
Fig. 2b
ein Schaltbild für die Ansteuerung der Verstellvorrichtung nach Fig. 1b.
Several embodiments of the invention are illustrated in the drawing and are explained in more detail below. Show it:
Fig. 1a
a longitudinal section through an impeller of an axial fan with an adjusting device according to the invention,
Fig. 1b
a longitudinal section through an impeller of an axial fan with an adjusting device according to another embodiment,
Fig. 2a
a circuit diagram for the control of the adjusting device according to Fig. 1a and
Fig. 2b
a circuit diagram for the control of the adjusting device according to Fig. 1b ,

In Fig. 1 ist ein Laufrad 1 eines Axialventilators gezeigt, das auf seinem Umfang mit mehreren Laufschaufeln 2 bestückt ist, von denen eine Laufschaufel angedeutet ist. Das Laufrad ist auf einer Welle 18 befestigt, die sowohl in einer separaten Hauptlagerung als auch zu einem Antriebsmotor eingebaut sein kann. Die Laufschaufeln 2 sind zur Anpassung des Axialventilators an die verschiedenen Betriebspunkte um ihre Längsachse verstellbar. Dazu ist ein die Laufschaufeln 2 tragender Holm 3 in einem Tragring 4 des Laufrades 1 drehbar gelagert.In Fig. 1 an impeller 1 of an axial fan is shown, which is equipped on its circumference with a plurality of blades 2, of which a blade is indicated. The impeller is mounted on a shaft 18, which may be installed in both a separate main bearing and a drive motor. The blades 2 are adjustable to adapt the axial fan to the various operating points about its longitudinal axis. For this purpose, the blades 2 carrying Holm 3 is rotatably mounted in a support ring 4 of the impeller 1.

Das Laufrad 1 ist mit einer Verstelleinrichtung zur Anstellung der Laufschaufeln 2 versehen. Dazu ist an jedem Holm 3 ein abgekröpfter Verstellhebel 5 befestigt, der in einer am Umfang einer in den Fig. 1a und 1b gezeigten Verstellscheibe 17 angebrachten Nut geführt ist.The impeller 1 is provided with an adjusting device for adjusting the rotor blades 2. For this purpose, a cranked adjusting lever 5 is attached to each spar 3, which in a on the circumference in the Fig. 1a and 1b shown adjusting plate 17 mounted groove is guided.

Die Verstellscheibe 17 ist mit einer Kolbenstange 8 verbunden, auf der ein Kolben 7 befestigt ist. Der Kolben 7 befindet sich innerhalb eines Verstellzylinders 6. Die Kolbenstange 8 mit dem Kolben 7 und die Verstellscheibe 17 sind entlang der Achse des Axialventilators verschiebbar angeordnet und rotieren mit der gleichen Drehzahl wie das Laufrad 1 und der Verstellzylinder 6.The adjusting plate 17 is connected to a piston rod 8, on which a piston 7 is fixed. The piston 7 is located within an adjusting cylinder 6. The piston rod 8 with the piston 7 and the adjusting plate 17 are slidably disposed along the axis of the axial fan and rotate at the same speed as the impeller 1 and the adjusting 6th

Das rückwärtige Ende der Kolbenstange 8 ist von einem Ölübergangsstück 13 umgeben. Bei der in Fig. 1b dargestellten Ausführungsform ist in dem Ölübergangsstück zusätzlich ein Rückschlagventil 16 angeordnet, auf dessen Bedeutung später noch eingegangen wird.The rear end of the piston rod 8 is surrounded by an oil transition piece 13. At the in Fig. 1b illustrated embodiment, a check valve 16 is additionally arranged in the oil transition piece, its importance will be discussed later.

Durch die Kolbenstange 8 sind zwei axiale Steuerkanäle 9, 10 geführt, die beiderseits des Kolbens 7 jeweils in eine Kammer 11, 12 münden. Je nach Beaufschlagung der Kammern 11 oder 12 mit Drucköl wird der Kolben 7 zusammen mit der Kolbenstange 8 und der Verstellscheibe 17 nach rechts oder links verschoben und damit der Holm 3 zusammen mit der Laufschaufel 2 in die eine oder andere Richtung gedreht.By the piston rod 8, two axial control channels 9, 10 are guided, which open on both sides of the piston 7 each in a chamber 11, 12. Depending on the action of the chambers 11 or 12 with pressure oil, the piston 7 is displaced together with the piston rod 8 and the adjusting plate 17 to the right or left, and thus the spar 3 is rotated together with the blade 2 in one or the other direction.

Die Ansteuerung des Verstellzylinders 6 erfolgt über eine in den Fig. 2a und 2b dargestellte redundante Ansteuereinrichtung. Nicht gezeigt in Fig. 2a und 2b ist die Ölstation, bestehend aus Ölpumpe, Öltank und Zubehör mit Instrumentierung. Die Ansteuereinrichtung ist im Wesentlichen wie folgt aufgebaut:

  • Eine Zulaufleitung P verbindet eine nicht dargestellte Ölpumpe über zwei Zweige P1 und P2 mit zwei 4-Wegeventilen 23, 33.
  • Eine Rücklaufleitung T verbindet die zwei 4-Wegeventile 23, 33 über zwei Zweige T1 und T2 mit dem nicht dargestellten Öltank.
  • Zwei zu Zweigen A1 und A2 sowie zu Zweigen B1 und B2 verzweigte Steuerölleitungen A, B verbinden die zwei 4-Wegeventile 23, 33 mit dem Ölübergangsstück 13 über Anschlüsse 14 und 15.
The control of the adjusting cylinder 6 via a in the Fig. 2a and 2 B illustrated redundant drive device. Not shown in Fig. 2a and 2 B is the oil station, consisting of oil pump, oil tank and accessories with instrumentation. The drive device is constructed essentially as follows:
  • A supply line P connects an oil pump, not shown, via two branches P1 and P2 with two 4-way valves 23, 33.
  • A return line T connects the two 4-way valves 23, 33 via two branches T1 and T2 with the oil tank, not shown.
  • Two branched to branches A1 and A2 and branches B1 and B2 control oil lines A, B connect the two 4-way valves 23, 33 with the oil transition piece 13 via terminals 14 and 15th

In die Zulaufleitung P ist ein Prüfanschluss 20 eingebaut. Der Prüfanschluss 20 erlaubt mittels einer Schnellkupplung mit Sitzventil den Anschluss von Prüfmitteln an die Zulaufleitung P. Ventilatorseitig von dem Prüfanschluss 20 ist die Zulaufleitung P zu gleichen Teilen in zwei parallele Zweige P1 und P2 aufgeteilt.In the supply line P, a test port 20 is installed. The test connection 20 permits the connection of test equipment to the supply line P by means of a quick coupling with a seat valve. The supply line P is divided equally into two parallel branches P1 and P2 on the test side.

In Fig. 2a und 2b ist die Strömungsrichtung des Steueröls durch Pfeile angedeutet. In Strömungsrichtung des Steueröls ist in den beiden Zweigen P1 und P2 der Zulaufleitung P jeweils ein manuelles Absperrventil 21, 31 eingebaut, das vorzugsweise als Kugelhahn ausgebildet ist. Die Absperrventile 21, 31 dienen dazu, im Fall des Austausches von nachfolgend angeordneten weiteren Ventilen die entsprechende Druck führende Zulaufleitung P zu diesen Ventilen absperren zu können. Zur Kontrolle des Durchflusses in den Zweigen P1, P2 der Zulaufleitung P ist ventilatorseitig von den Absperrventilen 21, 31 jeweils ein Prüfanschluss 22, 32 vorgesehen.In Fig. 2a and 2 B the flow direction of the control oil is indicated by arrows. In the flow direction of the control oil, a manual shut-off valve 21, 31 is installed in the two branches P1 and P2 of the supply line P, which is preferably designed as a ball valve. The check valves 21, 31 serve to be able to shut off the corresponding pressure leading supply line P to these valves in the case of replacement of subsequently arranged further valves. To check the flow in the branches P1, P2 of the supply line P is the ventilator side of the shut-off valves 21, 31 each have a test port 22, 32 is provided.

Redundant ist jeweils das elektromagnetisch betätigte 4-Wegeventil 23, 33 in einem der Zweige P1 bzw. P2 der Zulaufleitung P und einem der Zweige T1 bzw. T2 der Rücklaufleitung T eingebaut.Redundant is in each case the electromagnetically actuated 4-way valve 23, 33 installed in one of the branches P1 and P2 of the supply line P and one of the branches T1 and T2 of the return line T.

Von den zwei 4-Wegeventilen 23, 33 gehen zwei Ablaufleitungen T1 und T2 ab, die zu der Rücklaufleitung T zusammengeführt sind. Die Rücklaufleitung T ist an den nicht dargestellten Öltank angeschlossen.Of the two 4-way valves 23, 33 go from two drain lines T1 and T2, which are brought together to the return line T. The return line T is connected to the oil tank, not shown.

Die 4-Wegeventile 23, 33 sind vorzugsweise als 4/3-Wege-Proportionalregelventile ausgebildet. Ventilatorseitig sind die Zweige A1 und B1 der Steuerölleitungen A, B an das 4-Wegeventil 23 angeschlossen, während die Zweige A2 und B2 der Steuerölleitungen A, B ventilatorseitig auf das 4-Wegeventil 33 geführt sind.The 4-way valves 23, 33 are preferably designed as 4/3-way proportional control valves. On the fan side, the branches A1 and B1 of the control oil lines A, B are connected to the 4-way valve 23, while the branches A2 and B2 of the control oil lines A, B are guided on the fan side to the 4-way valve 33.

Außerdem ist ventilatorseitig vor den 4-Wegeventilen 23, 33 in jedem Zweig A1, B1, A2, B2 ein elektromagnetisch betätigtes Sitzventil 24, 25, 34, 35 eingebaut, das durch Federkraft in Schließstellung gehalten ist. Die Sitzventile 24, 25, 34, 35 sind vorzugsweise als 2/2-Wege-Kegelsitzventile ausgebildet. Die Sitzventile 24, 25 dienen als Absperreinrichtungen für das 4-Wegeventil 23, und die Sitzventile 34, 35 dienen als Absperreinrichtungen für das 4-Wegeventil 33. Die Sitzventile 24, 25, 34, 35 sind jeweils elektrisch mit den zugehörigen 4-Wegeventilen 23, 33 gekoppelt. Die in den Zweigen P1/A1 und T1/B1 eingebauten Ventile, nämlich 4-Wegeventil 23 und Sitzventile 24, 25, und die in den Zweigen P2/A2 und T2/B2 eingebauten Ventile, nämlich 4-Wegeventil 33 und Sitzventile 34, 35 liegen an unterschiedlichen Spannungsquellen an.In addition, the fan side of the 4-way valves 23, 33 in each branch A1, B1, A2, B2, an electromagnetically actuated seat valve 24, 25, 34, 35 installed, which is held by spring force in the closed position. The seat valves 24, 25, 34, 35 are preferably designed as 2/2-way cone seat valves. The seat valves 24, 25 serve as shut-off devices for the 4-way valve 23, and the seat valves 34, 35 serve as shut-off devices for the 4-way valve 33. The seat valves 24, 25, 34, 35 are each electrically connected to the associated 4-way valves 23 , 33 coupled. The built in the branches P1 / A1 and T1 / B1 valves, namely 4-way valve 23 and seat valves 24, 25, and built in the branches P2 / A2 and T2 / B2 valves, namely 4-way valve 33 and seat valves 34, 35 are applied to different voltage sources.

Die 4-Wegeventile 23, 33 und die Sitzventile 24, 25, 34, 35 sind jeweils mit einer Leuchtdiode 26 versehen, die so angeschlossen ist, dass diese leuchtet, solange das betreffende Ventil in Betrieb ist.The 4-way valves 23, 33 and the seat valves 24, 25, 34, 35 are each provided with a light-emitting diode 26 which is connected so that it lights up as long as the relevant valve is in operation.

Um den Austausch der Sitzventile 24, 25, 34, 35 während des Betriebes zu ermöglichen sind nach diesen jeweils ein manuelles Absperrventil 27, 28, 37, 38 eingebaut, das vorzugsweise als Kugelhahn ausgebildet ist, somit ist der Austausch während des Betriebes mit der redundanten Einheit ohne Fluiddruckverluste möglich.In order to enable the replacement of the seat valves 24, 25, 34, 35 during operation, a manual shut-off valve 27, 28, 37, 38 are installed after each of these, which is preferably designed as a ball valve, thus the replacement during operation with the redundant Unit without fluid pressure losses possible.

Der Verstellzylinder 6 kann durch die Zweige P1/A1/T1/B1 oder durch die Zweige P2/A2/T2/B2 mit den vorgegebenen Fluidmengen versorgt werden, um dadurch die gewünschte Verstellung zu realisieren. Die redundante Ansteuerung des Verstellzylinders 6 ist somit über entweder das eine 4-Wegeventil 23 oder das andere 4-Wegeventil 33 möglich. Die Sitzventile 24, 25, 34, 35 schließen bei Spannungsunterbrechung federbetätigt. Daher kann ohne Betriebsunterbrechung zwischen den beiden 4-Wegeventilen 23, 33 durch Wechsel der Spannungsversorgung umgeschaltet werden. Während der Umschaltzeit fließt kein Fluid zu dem Verstellzylinder 6 oder von diesem ab. Die Stellung des Kolbens 7 und damit die Stellung der durch den Verstellzylinder 6 verstellbaren Laufschaufeln 2 bleiben erhalten, bis die Umschaltung beendet ist und an einem der beiden 4-Wegeventile 23, 33 wieder die Spannungsversorgung anliegt. Nach dem Schließen eines der manuell betätigten Absperrventile 21, 31 kann das jeweils zugehörige außer Betrieb befindliche 4-Wegeventil 23, 33 ausgetauscht werden. Sollte eines der Sitzventile 24, 25, 34, 35 defekt sein, so kann nach dem manuellen Absperren mit dem jeweiligen Absperrventil 27, 28, 37, 38 das entsprechende zugehörige außer Betrieb befindliche Sitzventil ausgetauscht werden.The adjusting cylinder 6 can be supplied by the branches P1 / A1 / T1 / B1 or by the branches P2 / A2 / T2 / B2 with the predetermined amounts of fluid, thereby realizing the desired adjustment. The redundant control of the adjusting cylinder 6 is thus possible via either a 4-way valve 23 or the other 4-way valve 33. The poppet valves 24, 25, 34, 35 close at voltage interruption spring actuated. Therefore, it can be switched without interrupting the operation between the two 4-way valves 23, 33 by changing the power supply. During the switching time no fluid flows to the adjusting cylinder 6 or from this. The position of the piston 7 and thus the position of the adjustable by the adjusting cylinder 6 blades 2 are maintained until the switch is completed and applied to one of the two 4-way valves 23, 33 again the power supply. After closing one of the manually operated shut-off valves 21, 31, the respectively associated out of service 4-way valve 23, 33 can be replaced. Should one of the poppet valves 24, 25, 34, 35 be defective, then after manual shut-off with the respective shut-off valve 27, 28, 37, 38, the corresponding associated poppet valve can be exchanged.

Wie in Fig. 2b gezeigt ist, kann in den zum Tankanschluss führenden Rücklaufleitungen T1, T2 ein Druckbegrenzungsventil 29, 39 eingebaut sein. Ein solches Druckbegrenzungsventil 29, 39 ist dann vorteilhaft, wenn in der Steuerölleitung B unmittelbar vor dem Anschluss 15 des Ölübergangsstückes 13 der zweiten Kammer 12 des Verstellzylinders 6 ein Rückschlagventil 16 angeordnet ist. Das angeordnete Rückschlagventil 16 wird durch den Druck in der Steuerölleitung A in Offenstellung gehalten. Bei einem Ausfall oder einer Unterbrechung der Druckölversorgung fährt das Rückschlagventil 16 in Schließstellung. In der Schließstellung des Rückschlagventils 16 verharrt der Verstellzylinder 6 in seiner zuvor eingenommenen Stellung. Damit kann sich die über die Kolbenstange 8 und die Verstellscheibe 17 und den Holm 3 verbundene Laufschaufel 2 nicht zudrehen, sondern bleibt in der eingenommenen Stellung.As in Fig. 2b 2, a pressure limiting valve 29, 39 can be installed in the return lines T1, T2 leading to the tank connection. Such a pressure relief valve 29, 39 is advantageous if in the control oil line B immediately before the port 15 of the oil transition piece 13 of the second chamber 12 of the adjusting 6, a check valve 16 is arranged. The arranged check valve 16 is held by the pressure in the control oil line A in the open position. In case of failure or interruption of the pressure oil supply, the check valve 16 moves into the closed position. In the closed position of the check valve 16, the adjusting cylinder 6 remains in its previously assumed position. Thus, the connected via the piston rod 8 and the adjusting plate 17 and the spar 3 blade 2 can not turn, but remains in the assumed position.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

1.1.
LaufradWheel
2.Second
Laufschaufelblade
3.Third
HolmHolm
4.4th
Tragringsupport ring
5.5th
Verstellhebeladjusting
6.6th
Verstellzylinderadjusting cylinder
7.7th
Kolbenpiston
8.8th.
Kolbenstangepiston rod
9.9th
Steuerkanalcontrol channel
10.10th
Steuerkanalcontrol channel
11.11th
1. Kammer1st chamber
12.12th
2. Kammer2nd chamber
13.13th
lübergangsstücklübergangsstück
14.14th
Anschlussconnection
15.15th
Anschlussconnection
16.16th
Rückschlagventilcheck valve
17.17th
Verstellscheibeadjusting disc
18.18th
Wellewave
19.19th
20.20th
Prüfanschlusstest connection
21.21st
manuelles Absperrventilmanual shut-off valve
22.22nd
Prüfanschlusstest connection
23.23rd
4-Wegeventil4-way valve
24.24th
Sitzventilpoppet valve
25.25th
Sitzventilpoppet valve
26.26th
Leuchtdiodeled
27.27th
manuelles Absperrventilmanual shut-off valve
28.28th
manuelles Absperrventilmanual shut-off valve
29.29th
DruckbegrenzungsventilPressure relief valve
30.30th
31.31st
manuelles Absperrventilmanual shut-off valve
32.32nd
Prüfanschlusstest connection
33.33rd
4-Wegeventil4-way valve
34.34th
Sitzventilpoppet valve
35.35th
Sitzventilpoppet valve
36.36th
manuelles Absperrventilmanual shut-off valve
37.37th
manuelles Absperrventilmanual shut-off valve
38.38th
manuelles Absperrventilmanual shut-off valve
39.39th
DruckbegrenzungsventilPressure relief valve
AA
SteuerölleitungControl oil line
BB
SteuerölleitungControl oil line
PP
Zulaufleitungsupply line
TT
Ablaufleitungdrain line
A1A1
Zweigbranch
A2A2
Zweigbranch
B1B1
Zweigbranch
B2B2
Zweigbranch
P1P1
Zweigbranch
P2P2
Zweigbranch
T1T1
Zweigbranch
T2T2
Zweigbranch

Claims (11)

  1. Device for the hydraulic adjustment of the moving blades (2) of an impeller (1) of an axial fan, consisting of an adjusting cylinder (6) which has, on both sides of a piston (7) displaceably adjusting cylinder (6), a first chamber (11) and a second chamber (12) which are provided in each case with a connection (14), (15) via control-oil lines (A, B), the control-oil lines (A, B) being connected in each case to a 4-way valve, characterized in that both an inflow line (P) leading to one control-oil line (A) and a return line (T) connected to the other control-oil line (B) are divided in each case into two parallel branches (P1/A1, P2/A2, T1/B1, T2/B2), in that two redundant 4-way valves (23), (33) are arranged, each of which is mounted in one of the parallel branches (P1/A1 or P2/B2) and (T1/B1 or T2/B2), and in that a seat valve (24), (25), (34), (35) is arranged in each branch (A1, A2) of one control-oil line (A) and in each branch (B1, B2) of the other control-oil line (B) between the respective connection (14), (15) and the respective 4-way valve (23), (33).
  2. Device according to Claim 1, characterized in that the seat valve (24), (25), (34), (35) is designed as a seat valve closing as a result of spring force.
  3. Device according to Claim 1, characterized in that a manually actuated shut-off valve (21, 31) is arranged, upstream of the respective 4-way valve (23, 33) in the direction of flow of the control oil, in each of the two branches (P1, P2) of the inflow line (P).
  4. Device according to Claim 1, characterized in that a manual actuated shut-off valve (27, 28, 37, 38) is arranged, downstream of the respective seat valve (24, 25, 34, 35) in the direction of flow of the control oil, in each of the branches (A1, B1, A2, B2) of the control lines (A, B).
  5. Device according to Claim 1, characterized in that the 4-way valves (23, 33) are designed as 4/3-way proportional regulating valves.
  6. Device according to Claim 1, characterized in that the seat valves (24, 25, 34; 35) are designed as 2/2-way conical seat valves.
  7. Device according to Claim 1, characterized in that a common test connection (20) is arranged in the inflow line (P) upstream of its division into two branches (P1), (P2).
  8. Device according to Claim 1, characterized in that the 4-way valves (23), (33) and the seat valves (24), (25), (34), (35) are provided with a light-emitting diode (26).
  9. Device according to Claim 1, characterized in that the 4-way valves (23), (33) are coupled electrically to the seat valves (24), (25), (34), (35).
  10. Device according to Claim 1, characterized in that the 4-way valves (23), (33) and the seat valves (24), (25), (34), (35) are combined.
  11. Device according to Claim 1, characterized in that a pressure-limiting valve (29), (39) is arranged in each of the return lines (T1, T2), and a non-return valve (16) held in the open position by the pressure in the inflow line (P) is arranged in the connection (15) of an oil transition piece (13).
EP08002781A 2007-03-09 2008-02-15 Device for hydraulic adjustment of the rotor blades of a wheel of an axial ventilator Active EP1967739B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL08002781T PL1967739T3 (en) 2007-03-09 2008-02-15 Device for hydraulic adjustment of the rotor blades of a wheel of an axial ventilator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102007011990.0A DE102007011990B4 (en) 2007-03-09 2007-03-09 Device for the hydraulic adjustment of the blades of an impeller of an axial fan

Publications (3)

Publication Number Publication Date
EP1967739A2 EP1967739A2 (en) 2008-09-10
EP1967739A3 EP1967739A3 (en) 2009-07-01
EP1967739B1 true EP1967739B1 (en) 2010-11-17

Family

ID=39339914

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08002781A Active EP1967739B1 (en) 2007-03-09 2008-02-15 Device for hydraulic adjustment of the rotor blades of a wheel of an axial ventilator

Country Status (10)

Country Link
US (1) US7971519B2 (en)
EP (1) EP1967739B1 (en)
KR (1) KR101383926B1 (en)
CN (1) CN101275585B (en)
AT (1) ATE488702T1 (en)
DE (2) DE102007011990B4 (en)
DK (1) DK1967739T3 (en)
ES (1) ES2356490T3 (en)
PL (1) PL1967739T3 (en)
RU (1) RU2450168C2 (en)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100908579B1 (en) * 2009-01-21 2009-07-22 티엠디이엔지(주) Performance test apparatus of axial fan hydraulic blade adjustment for use in generator equipment
FR2945512B1 (en) * 2009-05-15 2012-08-24 Snecma NON-CAREED PROPELLER HAVING A VARIABLE SHAFT FOR A TURBOMACHINE
US9068556B2 (en) 2010-11-26 2015-06-30 Vestas Wind Systems A/S Pilot circuitry for controlling the emergency feathering of a wind turbine
CN102536660B (en) * 2010-11-26 2014-10-29 维斯塔斯风力***有限公司 Wind turbine with hydraulic blade pitch system
FR2978953B1 (en) * 2011-08-08 2013-09-20 Snecma HYDRAULIC CONTROL SYSTEM FOR THE ORIENTATION OF BLOWER BLADES
US20130283762A1 (en) * 2012-04-27 2013-10-31 General Electric Company Rotary vane actuator operated air valves
EP2881595B1 (en) * 2013-12-03 2018-08-22 Ansaldo Energia IP UK Limited Device for emergency operation of actuators
JP5975073B2 (en) * 2014-07-30 2016-08-23 コベルコ建機株式会社 Construction machinery
ES2615080B1 (en) 2015-12-02 2018-03-15 Pulverizadores Fede, S.L. Improved sprayer
CN105545569A (en) * 2016-01-30 2016-05-04 大连金州华兴机械加工厂 Power generation device rotating blade capable of automatically adjusting angle
CN106401856B (en) * 2016-11-15 2018-08-17 哈尔滨工程大学 Half active fluid pressure type series connection flapping foil marine tidal-current energy is caught can device
US20180252243A1 (en) * 2017-03-03 2018-09-06 Husco International, Inc. Systems and methods for dynamic response on mobile machines
CN107313967B (en) * 2017-07-13 2024-01-30 浙江双阳风机有限公司 Axial flow fan with adjustable counter-rotating movable blades
CN107654404A (en) * 2017-08-16 2018-02-02 张元杰 A kind of axial flow fan with adjustable moving blades hydraulic control actuator
CN110873083B (en) * 2018-09-03 2021-07-27 江苏科技大学 Double-valve parallel electro-hydraulic servo system and control method thereof
CN113027870B (en) * 2021-03-17 2022-10-18 四川百纳科技有限责任公司 Independent heat dissipation system of all-terrain armored vehicle and control method thereof
CN113280021A (en) * 2021-05-11 2021-08-20 成都正山机械制造有限公司 Integrated proportional valve control method
CN113339354B (en) * 2021-08-02 2021-11-09 中国电建集团透平科技有限公司 Moving blade adjusting device of axial flow fan
CN113404746B (en) * 2021-08-19 2021-11-09 中国电建集团透平科技有限公司 Axial flow fan blade control system and method

Family Cites Families (39)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2136122A (en) * 1935-03-21 1938-11-08 Midland Steel Prod Co Chassis side rail
US2297123A (en) * 1940-05-07 1942-09-29 Midland Steel Prod Co Automobile frame
US2850106A (en) 1955-10-05 1958-09-02 Swan Aldon Edward Reversible and variable pitch propeller
DE1403498A1 (en) * 1961-11-03 1969-07-10 Babcock & Wilcox Dampfkessel A Mechanical adjustment device for axial fan
US3722365A (en) * 1969-04-24 1973-03-27 Essar Corp Hydraulic pressure apparatus
DK131829C (en) * 1973-01-22 1976-02-09 Nordisk Ventilator SHOVE WITH SHAFT LOSS FOR AXIAL BLOWER WHEELS
US4027801A (en) * 1976-05-21 1977-06-07 Bucyrus-Erie Company Outrigger system for vehicles
US4065094A (en) * 1976-08-19 1977-12-27 Parker-Hannifin Corporation Hydraulic actuator
US4194639A (en) * 1977-05-12 1980-03-25 Jlg Industries, Inc. Truck mounted crane and method of constructing same
US4160558A (en) * 1977-10-19 1979-07-10 Harnischfeger Corporation Carrier frame for mobile crane
AU5051879A (en) * 1979-09-03 1981-03-12 Newman, T.L. Road-rail crane vehicle
US4348155A (en) 1980-03-17 1982-09-07 United Technologies Corporation Wind turbine blade pitch control system
SU1064051A1 (en) * 1982-04-29 1983-12-30 Таллинский Ордена Трудового Красного Знамени Машиностроительный Завод Им.И.Лауристина Axial-flow fan
DE3216433C2 (en) * 1982-05-03 1984-02-09 M.A.N. Maschinenfabrik Augsburg-Nürnberg AG, 8900 Augsburg Exhaust pipe system on a multi-cylinder internal combustion engine charged according to the stagnation principle
EP0103042B1 (en) * 1982-09-14 1986-08-13 Siemens Aktiengesellschaft Fan comprising automatically adjustable blades about its longitudinal axis to avoid undesirable rotational speed
US4595340A (en) * 1984-07-30 1986-06-17 General Electric Company Gas turbine bladed disk assembly
JPS6157468A (en) * 1984-08-28 1986-03-24 Toyota Motor Corp Side rail for car frame
SU1262132A1 (en) * 1984-12-25 1986-10-07 Свердловский горный институт им.В.В.Вахрушева Mechanism for turning axial-flow fan-moving blades
US4640421A (en) * 1985-02-26 1987-02-03 Mason Daniel P Truck crane conversion to crawler crane
CA1328433C (en) 1988-10-03 1994-04-12 Clarence Isert Variable pitch fan with fan cranks and axle housed shifting means
US4915613A (en) * 1989-01-25 1990-04-10 Honeywell Inc. Method and apparatus for monitoring pressure sensors
US5403145A (en) * 1991-08-02 1995-04-04 Serv-Tech, Inc. Street legal, mobile, truck mounted tube bundle pulling apparatus
EP0574604B1 (en) * 1992-06-16 1996-10-02 Siemens Aktiengesellschaft Electro-hydraulic adjusting device, in particular for the rear wheel steering of a motor vehicle
US5348171A (en) * 1992-12-08 1994-09-20 Link-Belt Construction Equip. Co. Removable outrigger for mobile crane
DE4331825C2 (en) 1993-05-05 1998-07-02 Muehlbauer Luftfahrttechn Gmbh Device for the hydraulic adjustment of an aircraft propeller
DE19600660C2 (en) * 1996-01-10 1998-04-09 Muehlbauer Luftfahrttechn Gmbh Hydraulically reversible adjustable propeller unit
US5882039A (en) * 1997-01-23 1999-03-16 Dana Corporation Hydroformed engine cradle and cross member for vehicle body and frame assembly
US6109871A (en) 1997-03-31 2000-08-29 Horton, Inc. Integrated fan assembly with variable pitch blades
DE19733470C1 (en) * 1997-08-02 1998-12-10 Daimler Benz Ag Support frame profile for working vehicle
US5836743A (en) 1997-10-22 1998-11-17 United Technologies Corporation Variable pitch counterweighted propeller system with releasable hydraulic pitchlock
CN2360648Y (en) * 1998-05-25 2000-01-26 北京风机二厂 Axial ventilator with wide root arc torsional overlapped impeller
US6250679B1 (en) * 1999-09-24 2001-06-26 Nmc Wollard, Inc. Airport vehicle frame assembly used therefore
US20020163173A1 (en) * 2001-05-07 2002-11-07 Ruehl Phillip C. Contoured hip/straight member vehicle frame
DE10126234B4 (en) * 2001-05-30 2005-03-24 Dr.Ing.H.C. F. Porsche Ag Building structure for a motor vehicle with composite beams
RU2219378C1 (en) * 2002-10-01 2003-12-20 Иванов Адольф Павлович Compressor stator of gas-turbine engine
FR2856424B1 (en) * 2003-06-20 2005-09-23 Snecma Moteurs DEVICE FOR VARIABLE SETTING OF TWO FLOORS OF BLADES FIXED ON A TURBOJETACTOR
US7108315B1 (en) * 2003-10-14 2006-09-19 Delaware Capital Formation, Inc. Support frame for container trailer
DE102006026834A1 (en) * 2006-06-07 2007-12-13 Tlt-Turbo Gmbh Device for measuring the Verstellhubes a hydraulic adjusting device
US20080087014A1 (en) * 2006-10-17 2008-04-17 Deere And Company Hydraulic circuit for a steer-by-wire steering system

Also Published As

Publication number Publication date
EP1967739A2 (en) 2008-09-10
EP1967739A3 (en) 2009-07-01
DE502008001791D1 (en) 2010-12-30
KR20080082910A (en) 2008-09-12
US20080219846A1 (en) 2008-09-11
KR101383926B1 (en) 2014-04-10
DK1967739T3 (en) 2011-03-07
ES2356490T3 (en) 2011-04-08
ATE488702T1 (en) 2010-12-15
PL1967739T3 (en) 2011-04-29
CN101275585A (en) 2008-10-01
RU2450168C2 (en) 2012-05-10
US7971519B2 (en) 2011-07-05
CN101275585B (en) 2011-11-16
RU2008108952A (en) 2009-09-20
DE102007011990B4 (en) 2019-01-10
DE102007011990A1 (en) 2008-09-11

Similar Documents

Publication Publication Date Title
EP1967739B1 (en) Device for hydraulic adjustment of the rotor blades of a wheel of an axial ventilator
DE102011078241B3 (en) Hydraulic unit, has valve connecting flow-reversible pump with connection line of another flow-reversible pump before switching another valve in load drive state, where hydraulic fluid is not conveyed to piston chamber in load drive state
DE2260552C3 (en) Guide vane ring for a gas turbine
DE3110266A1 (en) WIND TURBINE BLADE ANGLE ADJUSTMENT SYSTEM
DE2930219C2 (en) Thrust reverser control device for jet engines
DE3110265C2 (en)
EP2871356A1 (en) Actuating device for the impeller blade of a turbine
EP3105118B1 (en) Rudder driving system and method
DE112012005709T5 (en) Power steering apparatus
EP2052965A2 (en) Hydraulic adjustable propeller
DE19654781A1 (en) Auxiliary unit to provide redundancy for power supply of flying controls actuator
EP2929217B1 (en) Device for controlling the operation of a ventilator, which can be driven by a hydraulic motor, of a cooling device
DE10319075B4 (en) Brake device of the hydraulic type
DE2301622B2 (en) Electro-hydraulic rudder control device
EP2349831B1 (en) Arrangement for adjusting an aircraft propeller
DE2354166A1 (en) REVERSIBLE MULTISTAGE HYDRAULIC MACHINE
DE1484378B2 (en) HYDROPOWER PLANT FOR A LOW PRESSURE TURBINE WITH A LOCKABLE DIRECTOR AND A SECONDARY OUTLET ASSOCIATED TO THE TURBINE AND THE DIRECTOR WITH A LOCKING FROM SEVERAL, FROM WATER PRESSURE OF THE WATER PRESSURE OF THE HYDRAULIC FLAP
DE918620C (en) Wind power plant with adjustable blades and a start-up auxiliary device
EP3953578B1 (en) Hydroelectric power plant
DE102019109118B3 (en) Hydropower plant
DE1484378C3 (en) Hydroelectric power plant for a low-pressure turbine with a lockable diffuser and a secondary outlet associated with the turbine and the diffuser with a closure consisting of several flaps acted upon by water pressure, which are adjusted hydraulically as a function of the control of the turbine stator
CH654069A5 (en) METHOD FOR SWITCHING OFF A PUMP STORAGE HYDROPOWER PLANT WHICH IS IN PUMP OPERATION.
EP2592237B1 (en) Nozzle group control for turbines
DE61492C (en) Screw propeller with adjustable blades
DE2505792A1 (en) ADJUSTABLE MARINE PROPELLERS AND SYSTEMS WITH SUCH PROPELLERS

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA MK RS

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA MK RS

RIC1 Information provided on ipc code assigned before grant

Ipc: F04D 29/36 20060101AFI20080526BHEP

Ipc: F04D 27/02 20060101ALI20090525BHEP

17P Request for examination filed

Effective date: 20090811

AKX Designation fees paid

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

RIC1 Information provided on ipc code assigned before grant

Ipc: F04D 27/02 20060101ALI20100525BHEP

Ipc: F04D 29/36 20060101AFI20100525BHEP

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

REF Corresponds to:

Ref document number: 502008001791

Country of ref document: DE

Date of ref document: 20101230

Kind code of ref document: P

REG Reference to a national code

Ref country code: DK

Ref legal event code: T3

REG Reference to a national code

Ref country code: NL

Ref legal event code: VDEP

Effective date: 20101117

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2356490

Country of ref document: ES

Kind code of ref document: T3

Effective date: 20110408

LTIE Lt: invalidation of european patent or patent extension

Effective date: 20101117

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20110217

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20101117

REG Reference to a national code

Ref country code: PL

Ref legal event code: T3

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20101117

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20101117

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20101117

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20101117

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20101117

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20110317

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20101117

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20110217

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20101117

REG Reference to a national code

Ref country code: IE

Ref legal event code: FD4D

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20110218

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20101117

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20101117

Ref country code: IE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20101117

PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

BERE Be: lapsed

Owner name: TLT-TURBO G.M.B.H.

Effective date: 20110228

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20101117

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20101117

PLAX Notice of opposition and request to file observation + time limit sent

Free format text: ORIGINAL CODE: EPIDOSNOBS2

26 Opposition filed

Opponent name: HOWDEN VENTILATOREN GMBH

Effective date: 20110817

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20110228

REG Reference to a national code

Ref country code: DE

Ref legal event code: R026

Ref document number: 502008001791

Country of ref document: DE

Effective date: 20110817

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20111102

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20110228

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20101117

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20101117

PLBB Reply of patent proprietor to notice(s) of opposition received

Free format text: ORIGINAL CODE: EPIDOSNOBS3

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20110228

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20120229

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20120229

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20110215

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20101117

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20101117

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20101117

REG Reference to a national code

Ref country code: DE

Ref legal event code: R082

Ref document number: 502008001791

Country of ref document: DE

Representative=s name: PATENTANWAELTE ISENBRUCK BOESL HOERSCHLER LLP, DE

REG Reference to a national code

Ref country code: AT

Ref legal event code: MM01

Ref document number: 488702

Country of ref document: AT

Kind code of ref document: T

Effective date: 20130215

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20130215

REG Reference to a national code

Ref country code: DE

Ref legal event code: R100

Ref document number: 502008001791

Country of ref document: DE

PLCK Communication despatched that opposition was rejected

Free format text: ORIGINAL CODE: EPIDOSNREJ1

PLBN Opposition rejected

Free format text: ORIGINAL CODE: 0009273

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: OPPOSITION REJECTED

27O Opposition rejected

Effective date: 20150520

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20230317

Year of fee payment: 16

Ref country code: DK

Payment date: 20230220

Year of fee payment: 16

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: PL

Payment date: 20230130

Year of fee payment: 16

Ref country code: GB

Payment date: 20230221

Year of fee payment: 16

P01 Opt-out of the competence of the unified patent court (upc) registered

Effective date: 20230530

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20240223

Year of fee payment: 17