EP2161416B1 - Rotor turning device for a steam turbine - Google Patents

Rotor turning device for a steam turbine Download PDF

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Publication number
EP2161416B1
EP2161416B1 EP09166715.4A EP09166715A EP2161416B1 EP 2161416 B1 EP2161416 B1 EP 2161416B1 EP 09166715 A EP09166715 A EP 09166715A EP 2161416 B1 EP2161416 B1 EP 2161416B1
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EP
European Patent Office
Prior art keywords
rotor
turning device
steam turbine
drive pinion
exposed
Prior art date
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EP09166715.4A
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German (de)
French (fr)
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EP2161416A2 (en
EP2161416A3 (en
Inventor
Richard Geist
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Siemens AG
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Siemens AG
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Priority to PL09166715T priority Critical patent/PL2161416T3/en
Publication of EP2161416A2 publication Critical patent/EP2161416A2/en
Publication of EP2161416A3 publication Critical patent/EP2161416A3/en
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Publication of EP2161416B1 publication Critical patent/EP2161416B1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
    • F01D25/34—Turning or inching gear
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
    • F01D25/24—Casings; Casing parts, e.g. diaphragms, casing fastenings
    • F01D25/26—Double casings; Measures against temperature strain in casings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2270/00—Control
    • F05D2270/60—Control system actuates means
    • F05D2270/64—Hydraulic actuators

Definitions

  • the invention relates to a rotor rotating device for a steam turbine and a steam turbine having a rotor and the rotor rotating device, with which the rotor is drivable.
  • a steam turbine as used for example in a large-scale industrial chemical plant or in a power plant, is fed with live steam, which has a temperature of for example 500 ° C.
  • the rotor of the steam turbine is in contact with the live steam during operation of the steam turbine, so that the rotor is heated up accordingly when starting up the steam turbine.
  • the supply from the live steam to the steam turbine is inhibited, so that after the rotor has run out, the rotor cools slowly to an ambient temperature level.
  • the rotor has such a large mass, so that, as soon as the rotor has run down when leaving, the rotor bends because of its high temperature. This sagging has such a strong imbalance when restarting that the steam turbine must be switched off.
  • the remedy is provided by a rotor turning device with which, when the steam turbine is shut down, it is slowly further rotated immediately after the rotor has come to a standstill, so that the bending of the rotor is prevented.
  • a conventional rotor turning device is in Fig. 4 shown, with a rotor shaft 1 is driven.
  • the rotor shaft 1 has at one of its longitudinal ends a drive pinion 3, which is provided with an external toothing 4.
  • the rotor turning device has a pivot pinion 24 which can be coupled with the external toothing 4 of the drive pinion 3. Further, the rotor rotating device on a gear 25 and an electric motor 26, with which the pivot pinion 24 is driven.
  • the rotor turning device has a pivot arm 15 which is pivotally mounted on the bearing housing 2 with a Schwenkarmlager 16.
  • a lever 17 is attached to the pivot arm 15 on which a lifting piston 19 engages with a push rod 20 at a joint 21.
  • a displacement force can be applied to the pivoting arm 15, whereby the pivoting pinion 24 can be moved towards the drive pinion 3 and finally brought into engagement with the external toothing 4 of the drive pinion 3.
  • the electric motor 26 If the electric motor 26 is supplied with energy, it drives the gearbox 25, which in turn rotates the swivel pinion 4. Characterized the drive pinion 3 is driven, whereby the rotor shaft 1 is rotated about its axis of rotation 23.
  • the rotor shaft 1 can be rotated, so that a bending of the rotor shaft 1 is prevented due to temperature differences in the shaft.
  • the disadvantage however, that the rotor turning device is complex and space consuming in the construction.
  • the rotor turning device on many items, so that the rotor turning device is cost and maintenance intensive.
  • US 4643637 A is a remote-controlled latch for a gear disclosed.
  • US 3021719 A describes a device for transmitting a slow rotation to a rotor.
  • Object of the invention is to provide a rotor rotating device for a steam turbine and a steam turbine with a rotor which is driven by the rotor rotating device, wherein
  • the rotor turning device is simple, space-saving and inexpensive in construction.
  • the rotor rotating device according to the invention for a steam turbine whose rotor has a drive pinion on which the Ro-tor can be driven with the rotor rotating device, has a hydraulically driven external gear motor having at least two externally meshing gears and the housing einhausendes housing, and a coupling device with which the rotor rotating device, when mounted on the steam turbine, with the drive pinion can be coupled wherein the housing has a recess with which one of the gear wheels is exposed such that the exposed gear is engaged with the rotor gear coupled to the drive gear, whereby the drive gear is driven by the exposed gear.
  • the steam turbine according to the invention has a rotor and the rotor rotating device, wherein the rotor has a drive pinion with external teeth, in which the exposed gear with its teeth is engageable.
  • the rotor turning device according to the invention has a construction which is more compact than a conventional rotor turning device. Further, the rotor rotating device according to the invention has less moving components than a conventional rotor turning device, so that the rotor rotating device according to the invention is safe and easy to operate and inexpensive to purchase and low maintenance. Furthermore, advantageously, the rotor rotating device with the drive pinion can already be coupled, if the rotor has not come to a standstill, for example when the steam turbine is shut down. In addition, with the rotor rotating device according to the invention an advantageously large torque can be transmitted to the rotor and the rotor can be rotated at an advantageously high speed, which would not be achievable with a conventional rotor turning device.
  • the drive pinion does not necessarily have to be provided at a free end of the rotor in the rotary rotor device according to the invention, whereby, for example, a clutch for driving a machine can advantageously be provided on each of the two shaft ends of the rotor.
  • the housing preferably has a Hydraulikfluid micturinal through which hydraulic fluid for driving the gears hydraulic fluid is flowable.
  • the external gear motor is further preferably configured such that when the hydraulic fluid flows through the hydraulic fluid flow passage in the one direction, the exposed gear rotates in one direction and when the hydraulic fluid flows in the other direction through the hydraulic fluid flow channel, the exposed gear engages in the one direction other direction turns.
  • the uncovered gear is preferably, when the rotor rotating device is mounted on the steam turbine, movable with the clutch device radially to the drive pinion.
  • both are in engagement with their external teeth, with the exposed gear being in the plane of the drive sprocket.
  • the exposed gear is to be moved away from the drive pinion so far that the exposed gear is no longer engaged with the drive pinion.
  • the exposed gear is applied radially when engaging the drive pinion, it is harmless if either the exposed gear or the drive pinion are not at a standstill and / or their external teeth are not exactly on the gap. Rather, the exposed gear and / or the drive pinion can rotate during engagement, so that the external teeth of the exposed gear and the drive pinion can engage.
  • the coupling device preferably has a drive device and a pivoting arm, which is pivotably mounted on a Schwenkarmlager and at one longitudinal end the external gear motor is mounted, wherein the drive means on the pivot arm for pivoting the same engages.
  • the drive device preferably has a reciprocating piston which can be operated with hydraulic fluid. The radial movement of the external gear motor can be easily accomplished with the swivel arm, so that the exposed gearwheel can be coupled to the drive gearwheel or decoupled from the drive gearwheel during a corresponding swiveling movement of the swivel arm.
  • the steam turbine to a hydraulic fluid circuit, with which the external gear motor and the reciprocating piston is operable.
  • the hydraulic fluid circuit can be provided, with which both the external gear motor and the hydraulic piston can be operated.
  • a separate drive for driving the exposed gear need not be provided for the uncovered gear, whereby the rotor rotating device according to the invention advantageously has only a few components.
  • the recess preferably engages when the exposed gear meshes with the drive pinion, the drive pinion. Further, it is preferable that on the bearing housing, the rotor rotating device is supported and a stopper is provided, with which, when the rotor rotating device abuts the stop, the position of the rotor rotating device is set in the coupling state. As a result, it is prevented by means of the stopper that both the exposed gear is pressed too strongly onto the drive pinion and / or the housing strikes against the recess on the drive pinion. Thus, wear of the external gear motor when engaging in the drive pinion is advantageously prevented.
  • a steam turbine has a rotor shaft 1 and a bearing housing 2. At a shaft end of the rotor shaft 1, a drive pinion 3 is attached, which is provided with an external toothing 4. Fixedly mounted on the bearing housing 2 is a rotor turning device 5.
  • the rotor turning device 5 has an external gear motor 6, which has in each case a front-toothed drive gearwheel 7 and a counter gearwheel 8.
  • the gears 7 and 8 are arranged side by side meshing with each other in a housing 9.
  • bearings 10 for pivot bearings of the gears 7 and 8 are provided in the housing 9 .
  • a hydraulic oil inlet channel 11 and a hydraulic oil outlet channel 12 is formed, wherein the hydraulic oil outlet channel 12 is formed the hydraulic oil outlet channel 11 and in alignment with this.
  • both the hydraulic oil inflow passage 11 and the hydraulic oil discharge passage 12 are formed parallel to the tangential direction of the gears 7 and 8 in the range of their meshing.
  • the housing 9 has a recess 13 which exposes the drive gear 7 at a portion of its outer toothing in a region which is arranged facing away from the counter gear 8.
  • the recess 13 is dimensioned so that the toothing 14 of the drive gear 7 can be in engagement with the external toothing 4 of the drive pinion 3 when the drive pinion 3 engages in the recess 13.
  • the rotor turning device 5 has a swivel arm 15 with a swivel arm bearing 16 which, fixed to the bearing housing 2, supports the swivel arm 15 in a pivotable manner.
  • the external gear motor 6 is fastened with its housing 9.
  • Fig. 1 and 2 Seen to the left of the Schwenkarmlager 16 of the pivot arm 15 is extended with a lever 17 which has a handle 18 at its free-standing longitudinal end.
  • the rotor rotating device 5 has a reciprocating piston 19 which is mounted on the bearing housing 2. Coupled to the reciprocating piston 19, a push rod 20 is provided, which acts on a hinge 21 on the lever 17.
  • a thrust can be transmitted to the lever 17 via the push rod 20 and the joint 21, which in Fig. 1 and 2 in the vertical direction. Due to the thrust force, the swing arm 15 is pivoted about the swing arm bearing 16 so that when the pushing force is downward, the outside gear motor 6 moves away from the drive gear 3 and when the pushing force is upward, the outside gear motor 6 moves toward the drive gear 3 becomes.
  • the pushing force can be applied manually to the handle 18 on the lever 17.
  • the thrust force is to be applied to the lever 17 so that the external gear motor 6 is lifted from the drive pinion 3, whereby the external gear 4 of the drive pinion 3 with the teeth 14 of the drive gear 7 is disengaged. Furthermore, then the drive pinion 3 is no longer engaged with the recess 13, so that the rotor shaft 1 can either be at a standstill or optionally can rotate by the operation of the steam turbine.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gear Transmission (AREA)

Description

Die Erfindung betrifft eine Rotordrehvorrichtung für eine Dampfturbine sowie eine Dampfturbine mit einem Rotor und der Rotordrehvorrichtung, mit der der Rotor antreibbar ist.The invention relates to a rotor rotating device for a steam turbine and a steam turbine having a rotor and the rotor rotating device, with which the rotor is drivable.

Eine Dampfturbine, wie sie beispielsweise in einer großindustriellen Chemieanlage oder in einem Kraftwerk Anwendung findet, wird mit Frischdampf gespeist, der eine Temperatur von beispielsweise 500°C hat. Der Rotor der Dampfturbine steht mit dem Frischdampf beim Betrieb der Dampfturbine in Kontakt, so dass der Rotor beim Anfahren der Dampfturbine entsprechend stark aufgeheizt wird. Beim Abfahren der Dampfturbine ist die Zufuhr von dem Frischdampf zu der Dampfturbine unterbunden, so dass, nachdem der Rotor ausgelaufen ist, der Rotor langsam auf ein Umgebungstemperaturniveau abkühlt. Der Rotor hat eine so große Masse, so dass, sobald der Rotor beim Abfahren ausgelaufen ist, der Rotor aufgrund seiner hohen Temperatur sich durchbiegt. Dieses Durchbiegen hat beim Wiederanfahren eine derart starke Unwucht zur Folge, dass die Dampfturbine abgeschaltet werden muss. Erst nach dem so lange gewartet wurde bis der Rotor sich auf etwa die Umgebungstemperatur abgekühlt hat, ist der Rotor wieder gerade gebogen und die Dampfturbine könnte erst dann risikolos angefahren werden. Die Dauer des Zuwartens bis zur Abkühlung des Rotors kann jedoch mehrere Stunden bis mehrere Tage dauern, so dass ein Abfahren der Dampfturbine gefolgt von einem unmittelbar daran anschließenden Anfahren der Dampfturbine nicht möglich ist. Dies ist nachteilig für eine Dampfturbine beispielsweise in einer Chemieanlage oder in einem Kraftwerk, da hier lange Stillstandzeiten der Dampfturbine unerwünscht sind.A steam turbine, as used for example in a large-scale industrial chemical plant or in a power plant, is fed with live steam, which has a temperature of for example 500 ° C. The rotor of the steam turbine is in contact with the live steam during operation of the steam turbine, so that the rotor is heated up accordingly when starting up the steam turbine. When the steam turbine is shut down, the supply from the live steam to the steam turbine is inhibited, so that after the rotor has run out, the rotor cools slowly to an ambient temperature level. The rotor has such a large mass, so that, as soon as the rotor has run down when leaving, the rotor bends because of its high temperature. This sagging has such a strong imbalance when restarting that the steam turbine must be switched off. Only after waiting until the rotor has cooled to about the ambient temperature, the rotor is bent straight again and the steam turbine could only be approached without risk. However, the duration of waiting to cool the rotor can take several hours to several days, so that a shutdown of the steam turbine followed by an immediately subsequent startup of the steam turbine is not possible. This is disadvantageous for a steam turbine, for example in a chemical plant or in a power plant, since long downtimes of the steam turbine are undesirable here.

Abhilfe schafft eine Rotordrehvorrichtung, mit der beim Abfahren der Dampfturbine unmittelbar nach dem Stillstand des Rotors dieser langsam weiter gedreht wird, so dass das Durchbiegen des Rotors unterbunden ist. Eine herkömmliche Rotordrehvorrichtung ist in Fig. 4 gezeigt, mit der eine Rotorwelle 1 antreibbar ist. Die Rotorwelle 1 weist an einem ihrer Längsenden ein Antriebsritzel 3 auf, das mit einer Außenverzahnung 4 versehen ist. Die Rotordrehvorrichtung weist ein Schwenkritzel 24 auf, das mit der Außenverzahnung 4 des Antriebsritzels 3 kuppelbar ist. Ferner weist die Rotordrehvorrichtung ein Getriebe 25 und einen Elektromotor 26 auf, mit dem das Schwenkritzel 24 antreibbar ist. Ferner weist die Rotordrehvorrichtung einen Schwenkarm 15 auf, der an dem Lagergehäuse 2 mit einem Schwenkarmlager 16 verschwenkbar gelagert ist. Ein Hebel 17 ist an dem Schwenkarm 15 angebracht, an dem ein Hubkolben 19 mit einer Schubstange 20 an einem Gelenk 21 angreift. Unter Betätigung des Hubkolbens 19 ist auf den Schwenkarm 15 eine Verschiebekraft aufbringbar, wodurch das Schwenkritzel 24 zu dem Antriebsritzel 3 hin bewegbar und schließlich mit der Außenverzahnung 4 des Antriebsritzels 3 in Eingriff bringbar ist. Wird der Elektromotor 26 mit Energie versorgt, so treibt dieser das Getriebe 25 an, das wiederum das Schwenkritzel 4 drehantreibt. Dadurch wird das Antriebsritzel 3 angetrieben, wodurch die Rotorwelle 1 um ihre Drehachse 23 gedreht wird. Somit kann mit Hilfe der Rotordrehvorrichtung im Stillstand die Rotorwelle 1 gedreht werden, so dass ein Durchbiegen der Rotorwelle 1 aufgrund von Temperaturunterschieden in der Welle unterbunden ist. Nachteilig ist allerdings, dass die Rotordrehvorrichtung aufwändig und platzverbrauchend in der Konstruktion ist. Außerdem weist die Rotordrehvorrichtung viele Einzelteile auf, so dass die Rotordrehvorrichtung kosten- und wartungsintensiv ist.The remedy is provided by a rotor turning device with which, when the steam turbine is shut down, it is slowly further rotated immediately after the rotor has come to a standstill, so that the bending of the rotor is prevented. A conventional rotor turning device is in Fig. 4 shown, with a rotor shaft 1 is driven. The rotor shaft 1 has at one of its longitudinal ends a drive pinion 3, which is provided with an external toothing 4. The rotor turning device has a pivot pinion 24 which can be coupled with the external toothing 4 of the drive pinion 3. Further, the rotor rotating device on a gear 25 and an electric motor 26, with which the pivot pinion 24 is driven. Further, the rotor turning device has a pivot arm 15 which is pivotally mounted on the bearing housing 2 with a Schwenkarmlager 16. A lever 17 is attached to the pivot arm 15 on which a lifting piston 19 engages with a push rod 20 at a joint 21. Upon actuation of the lifting piston 19, a displacement force can be applied to the pivoting arm 15, whereby the pivoting pinion 24 can be moved towards the drive pinion 3 and finally brought into engagement with the external toothing 4 of the drive pinion 3. If the electric motor 26 is supplied with energy, it drives the gearbox 25, which in turn rotates the swivel pinion 4. Characterized the drive pinion 3 is driven, whereby the rotor shaft 1 is rotated about its axis of rotation 23. Thus, with the help of the rotor rotating device at standstill, the rotor shaft 1 can be rotated, so that a bending of the rotor shaft 1 is prevented due to temperature differences in the shaft. The disadvantage, however, that the rotor turning device is complex and space consuming in the construction. In addition, the rotor turning device on many items, so that the rotor turning device is cost and maintenance intensive.

In US 4643637 A ist ein ferngesteuerter Einraster für ein Zahnrad offenbart. US 3021719 A beschreibt eine Vorrichtung zum Übertragen einer langsamen Rotation auf einen Rotor.In US 4643637 A is a remote-controlled latch for a gear disclosed. US 3021719 A describes a device for transmitting a slow rotation to a rotor.

Aufgabe der Erfindung ist es eine Rotordrehvorrichtung für eine Dampfturbine und eine Dampfturbine mit einem Rotor, der von der Rotordrehvorrichtung antreibbar ist, zu schaffen, wobei die Rotordrehvorrichtung einfach, platzsparend und kostengünstig in der Konstruktion ist.Object of the invention is to provide a rotor rotating device for a steam turbine and a steam turbine with a rotor which is driven by the rotor rotating device, wherein The rotor turning device is simple, space-saving and inexpensive in construction.

Die Aufgabe wird mit den Merkmalen der Patentansprüche 1 und 6 gelöst. Bevorzugte Ausgestaltungen dazu sind in den abhängigen Patentansprüchen angegeben.The object is achieved with the features of claims 1 and 6. Preferred embodiments are given in the dependent claims.

Die erfindungsgemäße Rotordrehvorrichtung für eine Dampfturbine, deren Rotor ein Antriebsritzel aufweist, an dem der Ro-tor mit der Rotordrehvorrichtung antreibbar ist, weist einen hydraulisch antreibbaren Außenzahnradmotor, der wenigstens zwei im Außeneingriff miteinander kämmende Zahnräder und ein die Zahnräder einhausendes Gehäuse aufweist, und eine Kupplungseinrichtung auf, mit der die Rotordrehvorrichtung, wenn sie an der Dampfturbine montiert ist, mit dem Antriebsritzel kuppelbar ist, wobei das Gehäuse eine Aussparung aufweist, mit der eines der Zahnräder derart freigelegt ist, dass das freigelegte Zahnrad bei der mit dem Antriebsritzel gekuppelten Rotordrehvorrichtung mit diesem in Eingriff steht, wodurch das Antriebsritzel von dem freigelegten Zahnrad antreibar ist.The rotor rotating device according to the invention for a steam turbine whose rotor has a drive pinion on which the Ro-tor can be driven with the rotor rotating device, has a hydraulically driven external gear motor having at least two externally meshing gears and the housing einhausendes housing, and a coupling device with which the rotor rotating device, when mounted on the steam turbine, with the drive pinion can be coupled wherein the housing has a recess with which one of the gear wheels is exposed such that the exposed gear is engaged with the rotor gear coupled to the drive gear, whereby the drive gear is driven by the exposed gear.

Die erfindungsgemäße Dampfturbine weist einen Rotor und die Rotordrehvorrichtung auf, wobei der Rotor ein Antriebsritzel mit einer Außenverzahnung aufweist, in die das freigelegte Zahnrad mit seiner Verzahnung eingreifbar ist.The steam turbine according to the invention has a rotor and the rotor rotating device, wherein the rotor has a drive pinion with external teeth, in which the exposed gear with its teeth is engageable.

Die erfindungsgemäße Rotordrehvorrichtung weist eine Bauweise auf, die kompakter ist als eine herkömmliche Rotordrehvorrichtung. Ferner hat die erfindungsgemäße Rotordrehvorrichtung weniger bewegliche Bauteile als eine herkömmliche Rotordrehvorrichtung, so dass die erfindungsgemäße Rotordrehvorrichtung sicher und einfach im Betrieb sowie kostengünstig in der Anschaffung und wartungsarm ist. Ferner ist vorteilhaft die Rotordrehvorrichtung mit dem Antriebsritzel bereits dann kuppelbar, wenn der Rotor beispielsweise beim Abfahren der Dampfturbine noch nicht ganz zum Stillstand gekommen ist. Außerdem kann mit der erfindungsgemäßen Rotordrehvorrichtung auf den Rotor ein vorteilhaft großes Drehmoment übertragen werden und der Rotor bei einer vorteilhaft hohen Drehzahl gedreht werden, die mit einer herkömmlichen Rotordrehvorrichtung nicht erreichbar wäre. Konstruktionsbedingt braucht bei der erfindunsgemäßen Rotordrehvorrichtung das Antriebsritzel nicht zwangsläufig an einem freien Ende des Rotors vorgesehen zu werden, wodurch beispielsweise vorteilhaft an den beiden Wellenenden des Rotors jeweils eine Kupplung zum Antreiben einer Maschine vorgesehen werden kann.The rotor turning device according to the invention has a construction which is more compact than a conventional rotor turning device. Further, the rotor rotating device according to the invention has less moving components than a conventional rotor turning device, so that the rotor rotating device according to the invention is safe and easy to operate and inexpensive to purchase and low maintenance. Furthermore, advantageously, the rotor rotating device with the drive pinion can already be coupled, if the rotor has not come to a standstill, for example when the steam turbine is shut down. In addition, with the rotor rotating device according to the invention an advantageously large torque can be transmitted to the rotor and the rotor can be rotated at an advantageously high speed, which would not be achievable with a conventional rotor turning device. Due to the design, the drive pinion does not necessarily have to be provided at a free end of the rotor in the rotary rotor device according to the invention, whereby, for example, a clutch for driving a machine can advantageously be provided on each of the two shaft ends of the rotor.

Das Gehäuse weist bevorzugt einen Hydraulikfluiddurchströmkanal auf, durch den zum hydraulischen Antreiben der Zahnräder Hydraulikfluid strömbar ist. Der Außenzahnradmotor ist ferner bevorzugt eingerichtet, dass, wenn das Hydraulikfluid durch den Hydraulikfluiddurchströmkanal in die eine Richtung strömt, das freigelegte Zahnrad sich in die eine Richtung dreht und, wenn das Hydraulikfluid durch den Hydraulikfluiddurchströmkanal in die andere Richtung strömt, das freigelegte Zahnrad sich in die andere Richtung dreht. Dadurch ist einfach eine Drehrichtungsumkehr der Rotordrehvorrichtung bewerkstelligbar, nämlich indem lediglich die Durchströmrichtung des Hydraulikfluids gewechselt wird.The housing preferably has a Hydraulikfluiddurchströmkanal through which hydraulic fluid for driving the gears hydraulic fluid is flowable. The external gear motor is further preferably configured such that when the hydraulic fluid flows through the hydraulic fluid flow passage in the one direction, the exposed gear rotates in one direction and when the hydraulic fluid flows in the other direction through the hydraulic fluid flow channel, the exposed gear engages in the one direction other direction turns. As a result, simply reversing the direction of rotation of the rotor rotating device can be accomplished, namely merely by changing the direction of flow of the hydraulic fluid.

Zum Einkuppeln des freigelegten Zahnrads an das Antriebsritzel ist bevorzugt das freigelegte Zahnrad, wenn die Rotordrehvorrichtung an der Dampfturbine montiert ist, mit der Kupplungeseinrichtung radial zu dem Antriebsritzel hin bewegbar. Wenn dadurch das freigelegte Zahnrad mit dem Antriebsritzel gekuppelt ist, stehen beide mit ihren Außenverzahnungen in Eingriff, wobei das freigelegte Zahnrad in der Ebene des Antriebsritzels liegt. Beim Auskuppeln des freigelegten Zahnrads von dem Antriebsritzel ist das freigelegte Zahnrad von dem Antriebsritzel so weit weg zu bewegen, dass das freigelegte Zahnrad mit dem Antriebsritzel nicht mehr in Eingriff steht. Dadurch, dass das freigelegte Zahnrad beim Einkuppeln an das Antriebsritzel radial angelegt wird, ist es unschädlich, wenn entweder das freigelegte Zahnrad oder das Antriebsritzel nicht im Stillstand sind und/oder ihre Außenverzahnungen nicht exakt auf Lücke stehen. Vielmehr kann sich das freigelegte Zahnrad und/oder das Antriebsritzel beim Einkuppeln drehen, so dass die Außenverzahnungen des freigelegten Zahnrads und des Antriebsritzels in Eingriff gelangen können.To engage the uncovered gear to the drive pinion, the uncovered gear is preferably, when the rotor rotating device is mounted on the steam turbine, movable with the clutch device radially to the drive pinion. As a result, when the exposed gear is coupled to the drive sprocket, both are in engagement with their external teeth, with the exposed gear being in the plane of the drive sprocket. When disengaging the exposed gear from the drive pinion, the exposed gear is to be moved away from the drive pinion so far that the exposed gear is no longer engaged with the drive pinion. Characterized in that the exposed gear is applied radially when engaging the drive pinion, it is harmless if either the exposed gear or the drive pinion are not at a standstill and / or their external teeth are not exactly on the gap. Rather, the exposed gear and / or the drive pinion can rotate during engagement, so that the external teeth of the exposed gear and the drive pinion can engage.

Die Kupplungseinrichtung weist bevorzugt eine Antriebseinrichtung und einen Schwenkarm auf, der an einem Schwenkarmlager verschwenkbar gelagert ist und an dessen einem Längsende der Außenzahnradmotor befestigt ist, wobei die Antriebseinrichtung an dem Schwenkarm zum Verschwenken desselben angreift. Die Antriebseinrichtung weist bevorzugt einen Hubkolben auf, der mit Hydraulikfluid betreibbar ist. Mit dem Schwenkarm kann einfach geführt die Radialbewegung des Außenzahnradmotors bewerkstelligt werden, so dass bei einer entsprechenden Verschwenkbewegung des Schwenkarms das freigelegte Zahnrad mit dem Antriebsritzel kuppelbar bzw. von dem Antriebsritzel entkuppelbar ist.The coupling device preferably has a drive device and a pivoting arm, which is pivotably mounted on a Schwenkarmlager and at one longitudinal end the external gear motor is mounted, wherein the drive means on the pivot arm for pivoting the same engages. The drive device preferably has a reciprocating piston which can be operated with hydraulic fluid. The radial movement of the external gear motor can be easily accomplished with the swivel arm, so that the exposed gearwheel can be coupled to the drive gearwheel or decoupled from the drive gearwheel during a corresponding swiveling movement of the swivel arm.

Bevorzugt weist die Dampfturbine einen Hydraulikfluidkreislauf auf, mit dem der Außenzahnradmotor und der Hubkolben betreibbar ist. Somit kann vorteilhaft für die Dampfturbine der Hydraulikfluidkreislauf bereitgestellt werden, mit dem sowohl der Außenzahnradmotor als auch der Hydraulikkolben betrieben werden können. Somit braucht für das freigelegte Zahnrad etwa ein separater Antrieb zum Antreiben des freigelegten Zahnrads nicht bereitgestellt zu werden, wodurch die erfindungsgemäße Rotordrehvorrichtung vorteilhaft nur wenige Bauteile aufweist.Preferably, the steam turbine to a hydraulic fluid circuit, with which the external gear motor and the reciprocating piston is operable. Thus, advantageously for the steam turbine, the hydraulic fluid circuit can be provided, with which both the external gear motor and the hydraulic piston can be operated. Thus, a separate drive for driving the exposed gear need not be provided for the uncovered gear, whereby the rotor rotating device according to the invention advantageously has only a few components.

In die Aussparung greift bevorzugt, wenn das freigelegte Zahnrad mit den Antriebsritzel in Eingriff steht, das Antriebsritzel ein. Ferner ist es bevorzugt, dass an dem Lagergehäuse die Rotordrehvorrichtung abgestützt ist und ein Anschlag vorgesehen ist, mit dem, wenn die Rotordrehvorrichtung an den Anschlag anstößt, die Stellung der Rotordrehvorrichtung im Einkuppelzustand vorgegeben ist. Dadurch ist mit Hilfe des Anschlags unterbunden, dass sowohl das freigelegte Zahnrad zu stark auf das Antriebsritzel gedrückt und/oder das Gehäuse an der Aussparung an dem Antriebsritzel anstreift. Somit ist ein Verschleiß des Außenzahnradmotors beim Eingreifen in das Antriebsritzel vorteilhaft unterbunden.In the recess preferably engages when the exposed gear meshes with the drive pinion, the drive pinion. Further, it is preferable that on the bearing housing, the rotor rotating device is supported and a stopper is provided, with which, when the rotor rotating device abuts the stop, the position of the rotor rotating device is set in the coupling state. As a result, it is prevented by means of the stopper that both the exposed gear is pressed too strongly onto the drive pinion and / or the housing strikes against the recess on the drive pinion. Thus, wear of the external gear motor when engaging in the drive pinion is advantageously prevented.

Im Folgenden wird eine bevorzugte Ausführungsform der erfindungsgemäßen Rotordrehvorrichtung anhand der beigefügten schematischen Zeichnungen erläutert. Es zeigt:

  • Fig. 1 einen Querschnitt einer Rotorwelle und der Ausführungsform der Rotordrehvorrichtung im Auskuppelzustand,
  • Fig. 2 den Querschnitt aus Fig. 1, wobei die Rotordrehvorrichtung im Einkuppelzustand ist, und
  • Fig. 3 den Schnitt A-A aus Fig. 2 und eine schematische Querschnittsdarstellung der Rotordrehvorrichtung im Einkuppelzustand.
In the following, a preferred embodiment of the rotor turning device according to the invention will be explained with reference to the accompanying schematic drawings. It shows:
  • Fig. 1 a cross section of a rotor shaft and the embodiment of the rotor rotating device in the disengaged state,
  • Fig. 2 the cross section Fig. 1 wherein the rotor rotating device is in the engaged state, and
  • Fig. 3 the cut AA Fig. 2 and a schematic cross-sectional view of the rotor rotating device in the Einkuppelzustand.

Wie es aus Fig. 1 bis 3 ersichtlich ist, weist eine Dampfturbine eine Rotorwelle 1 und ein Lagergehäuse 2 auf. An einem Wellenende der Rotorwelle 1 ist ein Antriebsritzel 3 angebracht, das mit einer Außenverzahnung 4 versehen ist. An dem Lagergehäuse 2 fest montiert ist eine Rotordrehvorrichtung 5.Like it out Fig. 1 to 3 it can be seen, a steam turbine has a rotor shaft 1 and a bearing housing 2. At a shaft end of the rotor shaft 1, a drive pinion 3 is attached, which is provided with an external toothing 4. Fixedly mounted on the bearing housing 2 is a rotor turning device 5.

Die Rotordrehvorrichtung 5 weist einen Außenzahnradmotor 6 auf, der jeweils ein stirnseitig verzahntes Antriebszahnrad 7 und ein Gegenzahnrad 8 aufweist. Die Zahnräder 7 und 8 sind nebeneinanderliegend miteinander kämmend in einem Gehäuse 9 angeordnet. In dem Gehäuse 9 sind Lager 10 zum Drehlagern der Zahnräder 7 und 8 vorgesehen. In dem Bereich des Gehäuses 9, in dem die Zahnräder 7 und 8 miteinander kämmen, ist ein Hydrauliköleintrittskanal 11 und ein Hydraulikölaustrittskanal 12 ausgebildet, wobei der Hydraulikölaustrittskanal 12 den Hydraulikölaustrittskanal 11 fortführend und mit diesem fluchtend ausgebildet ist. Ferner ist sowohl der Hydrauliköleinstrittskanal 11 als auch der Hydraulikölaustrittskanal 12 parallel zu der Tangentialrichtung der Zahnräder 7 und 8 im Bereich von deren Ineinandergreifen ausgebildet.The rotor turning device 5 has an external gear motor 6, which has in each case a front-toothed drive gearwheel 7 and a counter gearwheel 8. The gears 7 and 8 are arranged side by side meshing with each other in a housing 9. In the housing 9 bearings 10 for pivot bearings of the gears 7 and 8 are provided. In the region of the housing 9, in which the gears 7 and 8 mesh with each other, a hydraulic oil inlet channel 11 and a hydraulic oil outlet channel 12 is formed, wherein the hydraulic oil outlet channel 12 is formed the hydraulic oil outlet channel 11 and in alignment with this. Further, both the hydraulic oil inflow passage 11 and the hydraulic oil discharge passage 12 are formed parallel to the tangential direction of the gears 7 and 8 in the range of their meshing.

Beim Betrieb des Außenzahnradmotors 6 tritt Hydrauliköl in den Hydrauliköleintrittskanal 11 ein, strömt an dem Antriebszahnrad 7 und dem Gegenzahnrad 8 vorbei und tritt am Hydraulikölaustrittskanal 12 wieder aus. Aufgrund der Viskosität und des Drucks des Hydrauliköls werden sowohl das Antriebszahnrad 7 als auch das Gegenzahnrad 8 beim Durchströmen des Bereichs, an dem beide Zahnräder 7 und 8 in Eingriff stehen, jeweils mit einem Drehmoment beaufschlagt, so dass sich in Fig. 1 bis 3 das Antriebszahnrad 7 im Uhrzeigersinn und das Gegenzahnrad 8 gegen den Uhrzeigersinn dreht.During operation of the external gear motor 6, hydraulic oil enters the hydraulic oil inlet channel 11, flows past the drive gear 7 and the counter gear 8 and exits the hydraulic oil outlet channel 12 again. Due to the viscosity and the pressure of the hydraulic oil, both the drive gear 7 and the counter gear 8 are flowed through the area where both gears 7 and 8 are engaged, each acted upon by a torque, so that in Fig. 1 to 3 the drive gear 7 in the clockwise direction and the counter gear 8 rotates counterclockwise.

Das Gehäuse 9 weist eine Aussparung 13 auf, die das Antriebszahnrad 7 an einem Abschnitt seiner Außenverzahnung in einem Bereich freilegt, der dem Gegenzahnrad 8 abgewandt angeordnet ist. Die Aussparung 13 ist so dimensioniert, dass die Verzahnung 14 des Antriebszahnrads 7 mit der Außenverzahnung 4 des Antriebsritzels 3 in Eingriff stehen kann, wenn das Antriebsritzel 3 in die Aussparung 13 eingreift.The housing 9 has a recess 13 which exposes the drive gear 7 at a portion of its outer toothing in a region which is arranged facing away from the counter gear 8. The recess 13 is dimensioned so that the toothing 14 of the drive gear 7 can be in engagement with the external toothing 4 of the drive pinion 3 when the drive pinion 3 engages in the recess 13.

Die Rotordrehvorrichtung 5 weist einen Schwenkarm 15 mit einem Schwenkarmlager 16 auf, das an dem Lagergehäuse 2 festgelegt den Schwenkarm 15 verschwenkbar lagert. In Fig. 1 und 2 gesehen rechts von dem Schwenkarmlager 16 angeordnet ist der Außenzahnradmotor 6 mit seinem Gehäuse 9 befestigt. In Fig. 1 und 2 gesehen links von dem Schwenkarmlager 16 ist der Schwenkarm 15 mit einem Hebel 17 verlängert, der an seinem freistehenden Längsende einen Griff 18 aufweist. Ferner weist die Rotordrehvorrichtung 5 einen Hubkolben 19 auf, der an dem Lagergehäuse 2 montiert ist. An dem Hubkolben 19 angekuppelt ist eine Schubstange 20 vorgesehen, die an einem Gelenk 21 an dem Hebel 17 angreift. Wird der Hubkolben 19 betätigt, so kann auf den Hebel 17 via die Schubstange 20 und das Gelenk 21 eine Schubkraft übertragen werden, die in Fig. 1 und 2 in die Vertikalrichtung zeigt. Hervorgerufen durch die Schubkraft wird der Schwenkarm 15 um das Schwenkarmlager 16 verschwenkt, so dass, wenn die Schubkraft nach unten zeigt, der Außenzahnradmotor 6 von dem Antriebsritzel 3 wegbewegt und, wenn die Schubkraft nach oben zeigt, der Außenzahnradmotor 6 zu dem Antriebsritzel 3 hin bewegt wird. Alternativ zu dem Hubkolben 19 kann die Schubkraft manuell an dem Griff 18 an dem Hebel 17 aufgebracht werden.The rotor turning device 5 has a swivel arm 15 with a swivel arm bearing 16 which, fixed to the bearing housing 2, supports the swivel arm 15 in a pivotable manner. In Fig. 1 and 2 When viewed from the right side of the swivel arm bearing 16, the external gear motor 6 is fastened with its housing 9. In Fig. 1 and 2 Seen to the left of the Schwenkarmlager 16 of the pivot arm 15 is extended with a lever 17 which has a handle 18 at its free-standing longitudinal end. Further, the rotor rotating device 5 has a reciprocating piston 19 which is mounted on the bearing housing 2. Coupled to the reciprocating piston 19, a push rod 20 is provided, which acts on a hinge 21 on the lever 17. If the reciprocating piston 19 is actuated, a thrust can be transmitted to the lever 17 via the push rod 20 and the joint 21, which in Fig. 1 and 2 in the vertical direction. Due to the thrust force, the swing arm 15 is pivoted about the swing arm bearing 16 so that when the pushing force is downward, the outside gear motor 6 moves away from the drive gear 3 and when the pushing force is upward, the outside gear motor 6 moves toward the drive gear 3 becomes. As an alternative to the lifting piston 19, the pushing force can be applied manually to the handle 18 on the lever 17.

Wird der Außenzahnradmotor 6 in Richtung zu dem Antriebsritzel 3 hin bewegt, so ist diese Bewegung begrenzt durch einen Anschlag 22 an dem Gehäuse 2, an den dann der Schwenkarm 15 stößt. Der Anschlag 22 ist derart angeordnet, dass, wenn der Schwenkarm 15 an den Anschlag 22 stößt, das Antriebsritzel 3 mit seiner Außenverzahnung 4 in die Aussparung 13 eingreift und mit der Verzahnung 14 des Antriebszahnrads 7 kämmt. Wird Hydrauliköl durch den Hydrauliköleinstrittskanal 11 und den Hydraulikölaustrittskanal 12 gedrückt, so wird das Antriebszahnrad 7 angetrieben und setzt via das Antriebsritzel 3 die Rotorwelle 1 um ihre Drehachse 23 gegen den Uhrzeigersinn in Fig. 1 bis 3 in eine Drehbewegung. Das Hydrauliköl wird von einem Schmierölkreislauf der Dampfturbine abgezweigt und, nachdem das Hydrauliköl den Außenzahnradmotor passiert hat, dem Schmierölkreislauf wieder zugeführt, so dass das Hydrauliköl in dem Schmierölkreislauf zirkulierendes Lageröl ist.If the external gear motor 6 is moved in the direction of the drive pinion 3, this movement is limited by a stop 22 on the housing 2, to which then the pivot arm 15 encounters. The stop 22 is arranged such that when the pivot arm 15 abuts against the stop 22, the drive pinion 3 engages with its external teeth 4 in the recess 13 and meshes with the toothing 14 of the drive gear 7. When hydraulic oil is forced through the hydraulic oil inlet passage 11 and the hydraulic oil discharge passage 12, the drive gear 7 is driven and sets the rotor shaft 1 about the rotational axis 23 counterclockwise via the drive gear 3 Fig. 1 to 3 in a rotary motion. The hydraulic oil is branched from a lubricating oil circuit of the steam turbine and, after the hydraulic oil has passed the external gear motor, returned to the lubricating oil circuit, so that the hydraulic oil in the lubricating oil circuit is circulating bearing oil.

Zum Entkoppeln des Außenzahnradmotors 6 von dem Antriebsritzel 3 ist auf den Hebel 17 die Schubkraft nach unten aufzubringen, so dass der Außenzahnradmotor 6 von dem Antriebsritzel 3 abgehoben wird, wodurch die Außenverzahnung 4 des Antriebsritzels 3 mit der Verzahnung 14 des Antriebszahnrads 7 außer Eingriff gerät. Ferner steht dann das Antriebsritzel 3 mit der Aussparung 13 nicht mehr in Eingriff, so dass die Rotorwelle 1 entweder im Stillstand sein kann oder sich gegebenenfalls durch den Betrieb der Dampfturbine drehen kann.To decouple the external gear motor 6 from the drive pinion 3, the thrust force is to be applied to the lever 17 so that the external gear motor 6 is lifted from the drive pinion 3, whereby the external gear 4 of the drive pinion 3 with the teeth 14 of the drive gear 7 is disengaged. Furthermore, then the drive pinion 3 is no longer engaged with the recess 13, so that the rotor shaft 1 can either be at a standstill or optionally can rotate by the operation of the steam turbine.

Claims (9)

  1. Rotor turning device for a steam turbine, of which the rotor (1) has a drive pinion (3), at which the rotor (1) can be driven by means of the rotor turning device (5), with a hydraulically driveable external-gear motor (6) which has at least two gearwheels (7, 8) meshing with one another in external engagement and a housing (9) accommodating the gearwheels (7, 8), and with a coupling arrangement (15 to 22) having a pivoting arm (15) which is mounted pivotably on a pivoting-arm bearing (16) and to one longitudinal end of which the external-gear motor (6) is fastened, by means of which coupling arrangement the rotor turning device (5), when mounted on the steam turbine, can be coupled to the drive pinion (3), characterized in that the housing (9) has a clearance (13), by means of which one of the gearwheels (7) is exposed in such a way that, when the rotor turning device (5) is coupled to the drive pinion (3), the exposed gearwheel (7) is in engagement with the latter, with the result that the drive pinion (3) can be driven by the exposed gearwheel (7).
  2. Rotor turning device according to Claim 1, the housing (9) having a hydraulic-fluid throughflow duct (11, 12) through which hydraulic fluid can flow in order to drive the gearwheels (7, 8) hydraulically.
  3. Rotor turning device according to Claim 2, the external-gear motor (6) being set up such that, when the hydraulic fluid flows through the hydraulic-fluid throughflow duct (11, 12) in one direction, the exposed gearwheel (7) rotates in one direction and, when the hydraulic fluid flows through the hydraulic-fluid throughflow duct (11, 12) in the other direction, the exposed gearwheel (7) rotates in the other direction.
  4. Rotor turning device according to one of Claims 1 to 3, for coupling the exposed gearwheel (7) to the drive pinion (3) the exposed gearwheel (7) being moveable radially towards the drive pinion (3) by means of the coupling arrangement (15 to 22) when the rotor turning device (5) is mounted on the steam turbine.
  5. Rotor turning device according to one of Claims 1 to 4, the coupling arrangement having a drive arrangement (19 to 21), which has a lifting piston (19) operable by hydraulic fluid, and a pivoting arm (15) which is mounted pivotably on a pivoting-arm bearing (16) and to one longitudinal end of which the external-gear motor (6) is fastened, the drive arrangement (19 to 21) engaging on the pivoting arm (15) in order to pivot the latter.
  6. Steam turbine with a rotor (1) and with a rotor turning device (5) according to one of Claims 1 to 5, the rotor (1) having a drive pinion (3) with external toothing (4), into which the exposed gearwheel (7) can engage with its toothing (14).
  7. Steam turbine according to Claim 6, the drive pinion (3) engaging into the clearance (13) when the exposed gearwheel (7) is in engagement with the drive pinion (3).
  8. Steam turbine according to Claim 6 or 7, the steam turbine having a hydraulic-fluid circuit, by means of which the external-gear motor (6) and the lifting piston (19) can be operated.
  9. Steam turbine according to one of Claims 6 to 8, the rotor turning device (5) being supported on the bearing housing (2), and a stop (22) being provided, by means of which, when the rotor turning device (5) butts against the stop (22), the position of the rotor turning device (5) in the coupling state is predetermined.
EP09166715.4A 2008-09-09 2009-07-29 Rotor turning device for a steam turbine Not-in-force EP2161416B1 (en)

Priority Applications (1)

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PL09166715T PL2161416T3 (en) 2008-09-09 2009-07-29 Rotor turning device for a steam turbine

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DE102008046347A DE102008046347A1 (en) 2008-09-09 2008-09-09 Rotor turning device for a steam turbine

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EP2161416A3 EP2161416A3 (en) 2013-04-17
EP2161416B1 true EP2161416B1 (en) 2014-09-17

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DE102017101339A1 (en) 2017-01-25 2018-07-26 Voith Patent Gmbh Method for operating a drive train for the variable-speed driving of a work machine and drive train

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DE102011080836A1 (en) 2011-08-11 2013-02-14 Siemens Aktiengesellschaft Rotor rotating means
US9322457B2 (en) 2012-02-22 2016-04-26 Mitsubishi Heavy Industries Compressor Corporation Turning device and rotating machine
EP2987969B1 (en) * 2014-01-28 2018-03-07 Mitsubishi Heavy Industries Compressor Corporation Turning device and rotary machine
US10215057B2 (en) 2015-05-13 2019-02-26 General Electric Company Rotor turning system and method
DE102015212402A1 (en) * 2015-07-02 2017-01-05 Siemens Aktiengesellschaft Starting device for a stationary gas turbine

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DE2405721A1 (en) * 1974-02-06 1975-08-14 Bhs Bayerische Berg ROTOR ROTATING DEVICE FOR A WORKING AND POWER MACHINE
JPS5910711A (en) * 1982-07-12 1984-01-20 Hitachi Ltd Booster for turner
US4643637A (en) * 1985-09-13 1987-02-17 Elliott Turbomachinery Co., Inc. Remote operated turning gear engager
JPS63113106A (en) * 1986-10-31 1988-05-18 Toshiba Corp Turning device of steam turbine

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Publication number Priority date Publication date Assignee Title
DE102017101339A1 (en) 2017-01-25 2018-07-26 Voith Patent Gmbh Method for operating a drive train for the variable-speed driving of a work machine and drive train
WO2018137916A1 (en) 2017-01-25 2018-08-02 Voith Patent Gmbh Method for operating a drivetrain for driving a working machine at a variable rotational speed, and drivetrain
US10876612B2 (en) 2017-01-25 2020-12-29 Voith Patent Gmbh Method for operating a drive train for driving a working machine with variable rotation speed and drive train

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JP5546185B2 (en) 2014-07-09
EP2161416A3 (en) 2013-04-17
DE102008046347A1 (en) 2010-03-11
PL2161416T3 (en) 2015-03-31
JP2010065700A (en) 2010-03-25

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