EP1999380B1 - Compressor unit and assembly method - Google Patents
Compressor unit and assembly method Download PDFInfo
- Publication number
- EP1999380B1 EP1999380B1 EP07727244A EP07727244A EP1999380B1 EP 1999380 B1 EP1999380 B1 EP 1999380B1 EP 07727244 A EP07727244 A EP 07727244A EP 07727244 A EP07727244 A EP 07727244A EP 1999380 B1 EP1999380 B1 EP 1999380B1
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- EP
- European Patent Office
- Prior art keywords
- compressor unit
- compressor
- housing
- drain
- fluid
- 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.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/60—Mounting; Assembling; Disassembling
- F04D29/601—Mounting; Assembling; Disassembling specially adapted for elastic fluid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D17/08—Centrifugal pumps
- F04D17/10—Centrifugal pumps for compressing or evacuating
- F04D17/12—Multi-stage pumps
- F04D17/122—Multi-stage pumps the individual rotor discs being, one for each stage, on a common shaft and axially spaced, e.g. conventional centrifugal multi- stage compressors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
- F04D25/0686—Units comprising pumps and their driving means the pump being electrically driven specially adapted for submerged use
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- 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
- F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
- F04D29/701—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps
Definitions
- the invention relates to a compressor unit, in particular for underwater operation, comprising a compressor and an electric motor, which compressor unit has a housing with an inlet and an outlet for a pumped medium, with a rotation axis about which a rotor of the compressor unit is rotatable, wherein electromagnetic bearings are provided, which are cooled by means of a cooling system to operating temperature, wherein the cooling system provides a tap in an overflow of the compressor and the tap by means of piping a portion of the fluid, passed through a filter and then passed through two separate pipes to the camps.
- the compressed medium to be compressed in particular natural gas to be conveyed, not only has a frequently varying aggressive chemical composition, but is also carriers of various condensates, which complicate the compression, in particular lead to increased wear of the compressor. For this reason, a condensate separation takes place before the compression. Even with the most expensive separation technology, it is not possible to prevent a subsequent separation of condensate in the compressor unit, which can affect at least the service life of a compressor unit. In the case of a compressor unit operated under water, there is also the problem that a connection which regularly takes place at the operating location of the conveying medium and discharging lines and the ambient medium, for example aggressive seawater, can already enter the compressor unit on the transport path and damage there can lead.
- the invention has set itself the task of eliminating the damage potential of condensates and other liquids in a particular intended for underwater operation compressor unit of the aforementioned type, without increasing the cost of installation and installation.
- a decisive advantage of the combination of the vertical installation with a drainage at the lower axial end of the housing is that on the one hand due to the elongated extent along the axis of rotation particularly favorable conditions of drainage therefore arise because due to the higher water column higher hydrostatic pressures present, which ensure a better drainage of the condensates from the housing. As a result, also flow through the drainage located at the lower axial end of the housing condensate driven by the higher hydrostatic pressure due to the vertical orientation better.
- the surfaces in the interior of the compressor unit are designed such that liquids which are in vertical alignment for operation in the interior of the housing are able to flow through the drainage only by gravity.
- the surfaces facing away from the drainage should have a slope, which has a flow for drainage result.
- suitable undercuts with respect to the drainage are inventively not provided inside the housing.
- a pump is connected to the drainage designed as an opening, which dissipates the condensate.
- the housing of the compressor unit is mounted in a frame by means provided on the housing support members, which storage is designed such that the housing is rotatable about a horizontal axis in the region of the rotor's center of gravity, and so the drainage from a low point at a high point to frame rotation.
- This development of the invention is particularly useful when an assembly process for a submerged to be operated compressor unit provides that the compressor unit is filled before lowering to the operating site under water with an incompressible fluid, then transported to the submerged location and the operating Connections to the inlet and the Outlet be connected and finally the compressor unit is emptied of the fluid through the drainage.
- it is useful to plug the inlet and outlet over water before filling the incompressible fluid and removing these closures before connecting the ports to the inlet and outlet For filling the housing of the compressor unit, it is useful if this is rotated about a horizontal axis, as described above, so that drainage is located at the upper axial end.
- a complete filling of the housing with the incompressible fluid can take place, in particular if the interior of the housing is designed such that in operation liquids flowing entirely by gravity can reach the drainage and the compressor unit is filled with the lower one axial end is located above.
- the corresponding inclination of the surfaces ensures that when filled with the incompressible fluid can not hold compressible gas bubbles in the housing.
- distilled water or demineralized water may serve as the incompressible fluid, so that the interior of the compressor unit is not exposed to the damaging influence of the ambient medium, for example seawater, and at the same time, the inlet and outlet closures are unaffected by the transport of the compressor unit to the underwater operating location special pressure load must withstand.
- Closing the inlet and outlet of the filled housing is also useful so that no fish swim into the compressor unit and crabs do not crawl into it.
- FIG. 1 shows a section along a compressor unit 1 according to the invention, which has as essential components a motor 2 and a compressor 3 in a gas-tight housing 4.
- the housing 4 accommodates the engine 2 and the compressor 3.
- the housing 4 is provided with an inlet 6 and an outlet 7, through the inlet 6 by means of an intake 8 to be compressed Fluid is sucked and flows through the outlet 7, the compressed fluid.
- the compressor unit 1 is arranged vertically in operation, wherein a motor rotor 15 of the motor 2 are combined via a compressor rotor 9 of the compressor 3 forming a common shaft 19 which rotates about a common vertical axis of rotation 60.
- the motor rotor 15 is mounted in a first radial bearing 21 at the upper end of the motor rotor 15.
- the compressor rotor 9 is mounted in a second radial bearing 22 in the lower position.
- a thrust bearing 25 is provided at the upper end of the common shaft 19 so at the upper end of the motor rotor 15.
- the radial bearings 21, 22 and the thrust bearing 25 operate electromagnetically and are each carried out encapsulated.
- the radial bearings 21, 22 extend in the circumferential direction around the respective bearing point of the shaft 19 and are in this case 360 ° encircling and undivided.
- the compressor 3 designed as a centrifugal compressor has three compressor stages 11 which are in each case connected by means of an overflow 33.
- the resulting at the compressor stages 11 pressure differences provide for a thrust on the compressor rotor 9, which transmits to the motor rotor 15 and against the weight of the resulting entire rotor of compressor rotor 9 and motor rotor 15, is directed, so that in nominal operation as far as possible thrust balance he follows.
- the thrust bearing 25 can be dimensioned comparatively smaller than in a horizontal arrangement.
- the electromagnetic bearings 21, 22, 25 are cooled by means of a cooling system 31 to operating temperature, wherein the cooling system 31 provides a tap 32 in an overflow of the compressor 3. From the tap 32 is a part of the pumped medium, which is preferably natural gas, passed through a filter 35 and then passed through two separate pipes to the respective outer bearing points (first radial bearing 21 and second radial bearing 22 and thrust bearing 25) by means of piping.
- This cooling by means of the cold pumped medium saves additional supply lines.
- the motor rotor 15 is surrounded by a stator 16, which has an encapsulation 39, so that the aggressive conveying medium does not damage windings of the stator 16.
- the encapsulation 39 is preferably designed so that it can bear the full operating pressure. This is also because a separate stator cooling 40 is provided, which promotes its own cooling medium 41 via a heat exchanger 43 by means of a pump 42.
- At least the encapsulation 39 is designed such that the portion extending between the stator 16 and the motor rotor 15, although a thin Wall thickness has, however, with a complete filling of the stator cooling 40 by means of the cooling medium 41 is able to hold the Auslegedruck state. In this way, larger eddy current losses are avoided in this area and the efficiency of the overall arrangement improves.
- the compressor rotor 9 expediently has a compressor shaft 10 on which the individual compressor stages 11 are mounted. This can preferably be done by means of a thermal shrinkage fit. Likewise, a positive connection, for example by means of polygons possible. Another embodiment provides for a fusion of different compressor stages 11 to each other, from which a one-piece compressor rotor 9 results.
- a dewatering point SDP At the lower axial end 63 of the housing 4 in the vertical operating position is a dewatering point SDP, at which a drainage 64 is in the form of an opening of the housing 4.
- a drainage 64 At the dewatering point SDP, all the liquid that is inside the casing 4 collects due to gravity only.
- all the surfaces inside the compressor unit are designed such that, when the operating direction is vertical, the inclination 65 of the surfaces reliably prevents the accumulation of liquid except at the dewatering point.
- a condensate pump 67 To the drainage 64, a condensate pump 67 is connected, which dissipates the resulting liquid.
- supporting elements 69 In the axial region of the rotor center of gravity 68 supporting elements 69 are provided on the housing, which offer the possibilities for attaching stop means to stop points.
- a receptacle in a frame 70 is possible, as in FIG. 2 and 3 shown.
- the receptacle in the frame 70 is designed such that a rotation of the compressor unit 1 about a horizontal axis is possible. In this way, the drainage 64 of the lowest point according to the vertical operating orientation are turned to the top point.
- the mounting method according to the invention provides that in a first step, the compressor unit 1 in the frame 70 is mirror-inverted to the operating position with the drainage 64 oriented upward in the vertical orientation of the axis of rotation 60. In this position, filling the compressor unit 1 by means of an incompressible fluid 82, namely by means of distilled or demineralized water takes place under closure of the inlet 6 and the outlet 7. Subsequently, the compressor unit 1 is rotated back into the operating position and transported under water to the operating site. Finally, with removal of the closures of the inlet 6 and the outlet 7, a respective line 80, 81 is connected for a pumped medium and there is a connection of the condensate pump 67 with subsequent condensate collection to the drainage 64. Before commissioning the compressor unit 1, the fluid filling of the condensate pump 67th pumped from the interior of the compressor unit 1.
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- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Compressor (AREA)
Abstract
Description
Die Erfindung betrifft eine Verdichtereinheit, insbesondere für den Unterwasserbetrieb, umfassend einen Verdichter und einen elektrischen Motor, welche Verdichtereinheit ein Gehäuse aufweist mit einem Einlass und einem Auslass für ein Fördermedium, mit einer Drehachse, um welche ein Rotor der Verdichtereinheit drehbar ist, wobei elektromagnetische Lager vorgesehen sind, welche mittels eines Kühlsystems auf Betriebstemperatur gekühlt werden, wobei das Kühlsystem eine Anzapfung in einer Überströmung des Verdichters vorsieht und von der Anzapfung mittels Rohrleitungen ein Teil des Fördermediums, durch einen Filter geleitet und anschließend durch zwei separate Rohrleitungen zu den Lagern geführt ist.The invention relates to a compressor unit, in particular for underwater operation, comprising a compressor and an electric motor, which compressor unit has a housing with an inlet and an outlet for a pumped medium, with a rotation axis about which a rotor of the compressor unit is rotatable, wherein electromagnetic bearings are provided, which are cooled by means of a cooling system to operating temperature, wherein the cooling system provides a tap in an overflow of the compressor and the tap by means of piping a portion of the fluid, passed through a filter and then passed through two separate pipes to the camps.
Jüngste Entwicklungen im Bereich des Verdichterbaus fokussieren sich auch auf Unterseeanordnung großer Verdichter, welcher der Förderung von Erdgasen dienen sollen. Aufgrund der besonderen Betriebsbedingungen, insbesondere wegen der stark eingeschränkten Zugänglichkeit sowohl zu Wartungszwecken als auch mittels Versorgungsleitungen sieht sich die Fachwelt vor großen Herausforderungen gestellt. Einschlägige Umweltbestimmungen verbieten jeglichen stofflichen Austausch zwischen den zu installierenden Aggregaten und dem umgebenden Seewasser. Hinzukommt, dass das Seewasser ein aggressives Medium ist und in den verschiedenen Meerestiefen extreme Druck- und Temperaturbedingungen anzutreffen sind. Eine weitere Anforderung besteht darin, dass die Aggregate einerseits eine äußerst hohe Standzeit aufweisen sollen und andererseits nahezu wartungsfrei ausgebildet sein müssen. Erschwerend ist zusätzlich eine nicht unerhebliche Verschmutzung des teilweise chemisch aggressiven zu fördernden Mediums.Recent developments in the field of compressor construction are also focused on subsections of large compressors, which are to serve the promotion of natural gas. Due to the special operating conditions, in particular because of the very limited accessibility both for maintenance purposes and by means of supply lines, the professional world faces great challenges. Relevant environmental regulations prohibit any material exchange between the units to be installed and the surrounding seawater. In addition, the seawater is an aggressive medium and extreme pressure and temperature conditions can be found in the different sea depths. Another requirement is that the aggregates on the one hand have an extremely long service life and on the other hand have to be designed virtually maintenance-free. To make matters worse, a significant contamination of the partially chemically aggressive medium to be promoted.
Das zu verdichtende Fördermedium, insbesondere zu förderndes Erdgas, weist nicht nur eine häufig variierende aggressive chemische Zusammensetzung auf, sondern ist auch Träger verschiedener Kondensate, welche die Verdichtung erschweren, insbesondere zu einem erhöhten Verschleiß des Verdichters führen. Aus diesem Grund findet vor der Verdichtung eine Kondensatabscheidung statt. Selbst mit aufwendigster Abscheidetechnologie gelingt es nicht, eine nachfolgende Abscheidung von Kondensat auch in der Verdichtereinheit zu verhindern, was zumindest die Standzeit einer Verdichtereinheit beeinträchtigen kann. Bei einer unter Wasser betriebenen Verdichtereinheit kommt zudem das Problem hinzu, dass ein Anschließen, der das Fördermedium zuleitenden und ableitenden Leitungen regelmäßig erst am Betriebsort stattfindet und auf dem Transportweg dorthin bereits das Umgebungsmedium, beispielsweise aggressives Seewasser, in die Verdichtereinheit eintreten kann und dort zu Schäden führen kann.The compressed medium to be compressed, in particular natural gas to be conveyed, not only has a frequently varying aggressive chemical composition, but is also carriers of various condensates, which complicate the compression, in particular lead to increased wear of the compressor. For this reason, a condensate separation takes place before the compression. Even with the most expensive separation technology, it is not possible to prevent a subsequent separation of condensate in the compressor unit, which can affect at least the service life of a compressor unit. In the case of a compressor unit operated under water, there is also the problem that a connection which regularly takes place at the operating location of the conveying medium and discharging lines and the ambient medium, for example aggressive seawater, can already enter the compressor unit on the transport path and damage there can lead.
Aus der internationale Patentanmeldung
Ausgehend von den Problemen des Standes der Technik hat es sich die Erfindung zur Aufgabe gemacht, dass Schadenspotenzial von Kondensaten und anderen Flüssigkeiten in einer insbesondere für den Unterwasserbetrieb vorgesehenen Verdichtereinheit des vorgenannten Typs zu beseitigen, ohne den Aufwand der Aufstellung und der Installation zu erhöhen.Based on the problems of the prior art, the invention has set itself the task of eliminating the damage potential of condensates and other liquids in a particular intended for underwater operation compressor unit of the aforementioned type, without increasing the cost of installation and installation.
Zur Lösung der erfindungsgemäßen Aufgabe wird eine Verdichtereinheit nach Anspruch 1 und eine Methode zur Montage einer Verdichtereinheit nach Anspruch 7 vorgeschlagen. Die jeweils rückbezogenen Unteransprüche beinhalten vorteilhafte Weiterbildungen der Erfindung.To achieve the object of the invention, a compressor unit according to claim 1 and a method for mounting a compressor unit according to
Ein entscheidender Vorteil der Kombination der vertikalen Aufstellung mit einer Entwässerung am unteren axialen Ende des Gehäuses liegt darin, dass sich einerseits aufgrund der länglichen Erstreckung entlang der Drehachse besonders günstige Bedingungen der Entwässerung deshalb ergeben, weil in Folge der höheren Wassersäule höhere hydrostatische Drücke vorliegen, welche für ein besseres Abfließen der Kondensate aus dem Gehäuse sorgen. Dem zur Folge fließen auch durch die am unteren axialen Ende des Gehäuses befindliche Entwässerung Kondensate getrieben von dem höheren hydrostatischen Druck aufgrund der vertikalen Ausrichtung besser ab.A decisive advantage of the combination of the vertical installation with a drainage at the lower axial end of the housing is that on the one hand due to the elongated extent along the axis of rotation particularly favorable conditions of drainage therefore arise because due to the higher water column higher hydrostatic pressures present, which ensure a better drainage of the condensates from the housing. As a result, also flow through the drainage located at the lower axial end of the housing condensate driven by the higher hydrostatic pressure due to the vertical orientation better.
Um ein restloses Abfließen der Flüssigkeiten zu gewährleisten, ist es zweckmäßig, wenn die Oberflächen im Inneren der Verdichtereinheit derart gestaltet sind, dass bei vertikaler Ausrichtung für den Betrieb im Inneren des Gehäuses befindliche Flüssigkeiten lediglich aufgrund der Schwerkraft fließend die Entwässerung erreichen. Hierzu sollten die von der Entwässerung abgewandten Oberflächen eine Neigung aufweisen, welche ein Fließen zur Entwässerung zur Folge hat. Zur Sammlung von Flüssigkeit geeignete Hinterschneidungen bezüglich der Entwässerung sind erfindungsgemäß nicht im Gehäuseinneren vorgesehen.In order to ensure a complete drainage of the liquids, it is expedient if the surfaces in the interior of the compressor unit are designed such that liquids which are in vertical alignment for operation in the interior of the housing are able to flow through the drainage only by gravity. For this purpose, the surfaces facing away from the drainage should have a slope, which has a flow for drainage result. For collection of fluid suitable undercuts with respect to the drainage are inventively not provided inside the housing.
Zur restlosen Abförderung von den Kondensaten und zur Überwindung etwaiger Druckdifferenzen ist es zweckmäßig, wenn an die als Öffnung ausgebildete Entwässerung eine Pumpe angeschlossen ist, welche das Kondensat abfördert.For complete removal of the condensates and to overcome any pressure differences, it is expedient if a pump is connected to the drainage designed as an opening, which dissipates the condensate.
Für Montagevorgänge ist es darüber hinaus zweckmäßig, wenn das Gehäuse der Verdichtereinheit in einem Rahmen mittels an dem Gehäuse vorgesehener Abstützelemente gelagert ist, wobei diese Lagerung derart ausgebildet ist, dass das Gehäuse um eine horizontale Achse im Bereich des Rotorschwerpunkts drehbar ist, und so die Entwässerung von einem Tiefpunkt an einem Hochpunkt um Rahmen der Drehung wechselt.For assembly operations, it is also expedient if the housing of the compressor unit is mounted in a frame by means provided on the housing support members, which storage is designed such that the housing is rotatable about a horizontal axis in the region of the rotor's center of gravity, and so the drainage from a low point at a high point to frame rotation.
Diese Weiterbildung der Erfindung ist insbesondere dann zweckmäßig, wenn ein Montageverfahren für eine unter Wasser zu betreibende Verdichtereinheit vorsieht, dass die Verdichtereinheit vor dem Absenken an den Betriebsort unter Wasser mit einem inkompressiblen Fluid gefüllt wird, anschließend an den unter Wasser befindlichen Betriebsort transportiert wird und die Anschlüsse an den Einlass und den Auslass angeschlossen werden und abschließend die Verdichtereinheit von dem Fluid durch die Entwässerung entleert wird. Um einen Austausch mit dem Umgebungsmedium unter Wasser zu verhindern, ist es sinnvoll, wenn der Einlass und der Auslass über Wasser verschlossen werden, bevor das inkompressible Fluid eingefüllt wird und diese Verschlüsse wieder entfernt werden, bevor die Anschlüsse an den Einlass und den Auslass angeschlossen werden. Zum Befüllen des Gehäuses der Verdichtereinheit ist es sinnvoll, wenn dieses um eine horizontale Achse, wie zuvor beschrieben, gedreht wird, so dass sich Entwässerung am oberen axialen Ende befindet. Durch die Entwässerung hindurch kann eine vollständige Füllung des Gehäuses mit dem inkompressiblen Fluid erfolgen, insbesondere, wenn das Innere des Gehäuses so gestaltet ist, dass in dem Betrieb Flüssigkeiten vollständig aufgrund der Schwerkraft fließend die Entwässerung erreichen können und die Verdichtereinheit sich beim Befüllen mit dem unteren axialen Ende oben befindet. Die dementsprechende Neigung der Oberflächen sorgt dafür, dass sich bei der Befüllung mit dem inkompressiblen Fluid keine kompressiblen Gasblasen in dem Gehäuse halten können. Als inkompressibles Fluid können beispielsweise destilliertes Wasser oder demineralisiertes Wasser dienen, so dass das Innere der Verdichtereinheit nicht dem schädigenden Einfluss des Umgebungsmediums, beispielsweise des Seewassers ausgesetzt wird und gleichzeitig die Verschlüsse von Einlass und Auslass im Rahmen des Transports der Verdichtereinheit an den Betriebsort unter Wasser keiner besonderen Druckbelastung Stand halten müssen.This development of the invention is particularly useful when an assembly process for a submerged to be operated compressor unit provides that the compressor unit is filled before lowering to the operating site under water with an incompressible fluid, then transported to the submerged location and the operating Connections to the inlet and the Outlet be connected and finally the compressor unit is emptied of the fluid through the drainage. In order to avoid submerged exchange with the ambient medium, it is useful to plug the inlet and outlet over water before filling the incompressible fluid and removing these closures before connecting the ports to the inlet and outlet , For filling the housing of the compressor unit, it is useful if this is rotated about a horizontal axis, as described above, so that drainage is located at the upper axial end. Through the drainage, a complete filling of the housing with the incompressible fluid can take place, in particular if the interior of the housing is designed such that in operation liquids flowing entirely by gravity can reach the drainage and the compressor unit is filled with the lower one axial end is located above. The corresponding inclination of the surfaces ensures that when filled with the incompressible fluid can not hold compressible gas bubbles in the housing. For example, distilled water or demineralized water may serve as the incompressible fluid, so that the interior of the compressor unit is not exposed to the damaging influence of the ambient medium, for example seawater, and at the same time, the inlet and outlet closures are unaffected by the transport of the compressor unit to the underwater operating location special pressure load must withstand.
Ein Verschließen des Einlasses und des Auslasses des befüllten Gehäuses ist auch zweckmäßig, damit keine Fische in die Verdichtereinheit schwimmen und keine Krabben hinein kriechen.Closing the inlet and outlet of the filled housing is also useful so that no fish swim into the compressor unit and crabs do not crawl into it.
Im Folgenden ist die Erfindung anhand eines speziellen Ausführungsbeispiels unter Bezugnahme auf Zeichnungen näher beschrieben. Die gezeigten Ausführungsformen sind lediglich zur Verdeutlichung als Beispiel der Erfindung zu verstehen. Es zeigen:
- Figur 1
- eine schematische Darstellung eines Längsschnitts durch eine Verdichtereinheit,
- Figur 2, 3
- jeweils eine schematische Darstellung von Verfahrensschritten der erfindungsgemäßen Montagemethode.
- FIG. 1
- a schematic representation of a longitudinal section through a compressor unit,
- FIG. 2, 3
- in each case a schematic representation of method steps of the mounting method according to the invention.
Die Verdichtereinheit 1 ist im Betrieb vertikal angeordnet, wobei ein Motorrotor 15 des Motors 2 über einem Verdichterrotor 9 des Verdichters 3 eine gemeinsame Welle 19 bildend vereint sind, die sich um eine gemeinsame vertikale Drehachse 60 dreht.The compressor unit 1 is arranged vertically in operation, wherein a motor rotor 15 of the motor 2 are combined via a compressor rotor 9 of the compressor 3 forming a common shaft 19 which rotates about a common vertical axis of
Der Motorrotor 15 ist in einem ersten Radiallager 21 am oberen Ende des Motorrotors 15 gelagert.The motor rotor 15 is mounted in a first radial bearing 21 at the upper end of the motor rotor 15.
Der Verdichterrotor 9 ist in einem zweiten Radiallager 22 in unterer Position gelagert.The compressor rotor 9 is mounted in a second radial bearing 22 in the lower position.
Am oberen Ende der gemeinsamen Welle 19 also am oberen Ende des Motorrotors 15 ist ein Axiallager 25 vorgesehen. Die Radiallager 21, 22 und das Axiallager 25 arbeiten elektromagnetisch und sind jeweils gekapselt ausgeführt. Die Radiallager 21, 22 erstrecken sich hierbei in Umfangsrichtung um die jeweilige Lagerstelle der Welle 19 und sind hierbei 360° umlaufend und ungeteilt ausgebildet.At the upper end of the common shaft 19 so at the upper end of the motor rotor 15, a thrust bearing 25 is provided. The
Der als Zentrifugalverdichter ausgebildete Verdichter 3 weist drei Verdichterstufen 11 auf, die jeweils mittels einer Überströmung 33 in Verbindung stehen. Die sich an den Verdichterstufen 11 ergebenen Druckdifferenzen sorgen für einen Schub an dem Verdichterrotor 9, der sich auf dem Motorrotor 15 überträgt und entgegen der Gewichtskraft des sich ergebenden gesamten Rotors aus Verdichterrotor 9 und Motorrotor 15, gerichtet ist, so dass ein im Nennbetrieb weitestgehender Schubausgleich erfolgt. Auf diese Weise kann das Axiallager 25 vergleichsweise kleiner dimensioniert sein als in einer horizontalen Anordnung.The compressor 3 designed as a centrifugal compressor has three
Die elektromagnetischen Lager 21, 22, 25 sind mittels eines Kühlsystems 31 auf Betriebstemperatur gekühlt, wobei das Kühlsystem 31 eine Anzapfung 32 in einer Überströmung des Verdichters 3 vorsieht. Von der Anzapfung 32 wird mittels Rohrleitungen ein Teil des Fördermediums, welches vorzugsweise Erdgas ist, durch einen Filter 35 geleitet und anschließend durch zwei separate Rohrleitungen zu den jeweils äußeren Lagerstellen (erstes Radiallager 21 und zweites Radiallager 22 sowie Axiallager 25) geführt. Diese Kühlung mittels des kalten Fördermediums erspart zusätzliche Versorgungsleitungen.The
Der Motorrotor 15 ist von einem Stator 16 umgeben, der eine Kapselung 39 aufweist, so dass das aggressive Fördermedium Wicklungen des Stators 16 nicht beschädigt. Die Kapselung 39 ist hierbei bevorzugt so ausgelegt, dass sie den vollen Betriebsdruck zu ertragen vermag. Dies auch deshalb, weil eine separate Statorkühlung 40 vorgesehen ist, die ein eigenes Kühlmedium 41 über einen Wärmetauscher 43 mittels einer Pumpe 42 fördert. Zumindest ist die Kapselung 39 derart ausgeführt, dass der Abschnitt, der sich zwischen dem Stator 16 und dem Motorrotor 15 erstreckt zwar eine dünne Wandstärke aufweist jedoch bei einer vollständigen Füllung der Statorkühlung 40 mittels des Kühlmediums 41 in der Lage ist, dem Auslegedruck Stand zu halten. Auf diese Weise werden größere Wirbelstromverluste in diesem Bereich vermieden und der Wirkungsgrad der Gesamtanordnung verbessert sich.The motor rotor 15 is surrounded by a
Der Verdichterrotor 9 weist zweckmäßig eine Verdichterwelle 10 auf, auf der die einzelnen Verdichterstufen 11 montiert sind. Dies kann bevorzugt mittels einer thermischen Schrumpfpassung erfolgen. Ebenso ist ein Formschluss, beispielsweise mittels Polygonen möglich. Eine andere Ausführungsform sieht eine Schweißung verschiedener Verdichterstufen 11 an einander vor, aus der ein einstückiger Verdichterrotor 9 resultiert.The compressor rotor 9 expediently has a compressor shaft 10 on which the
An dem unteren axialen Ende 63 des Gehäuses 4 in der vertikalen Betriebsposition befindet sich ein Entwässerungspunkt SDP, an welchem sich in Form einer Öffnung des Gehäuses 4 eine Entwässerung 64 befindet. An dem Entwässerungspunkt SDP sammelt sich sämtliche Flüssigkeit, die sich im Inneren des Gehäuses 4 befindet, abfließend aufgrund lediglich der Schwerkraft. Hierzu sind sämtliche Oberflächen im Inneren der Verdichtereinheit derart gestaltet, dass bei vertikaler Betriebsausrichtung die Neigung 65 der Oberflächen ein Ansammeln von Flüssigkeit außer am Entwässerungspunkt sicher verhindert. An die Entwässerung 64 ist eine Kondensatpumpe 67 angeschlossen, die die anfallende Flüssigkeit abfördert. Im Axialbereich des Rotorschwerpunktes 68 sind an dem Gehäuse Abstützelemente 69 vorgesehen, welche die Möglichkeiten zum Anbringen von Anschlagmitteln an Anschlagpunkten bieten.At the lower
Mittels der Abstützelemente 69 ist eine Aufnahme in einem Rahmen 70 möglich, wie in
Die erfindungsgemäße Montagemethode sieht vor, dass in einem ersten Schritt die Verdichtereinheit 1 in dem Rahmen 70 spiegelbildlich zu der Betriebsposition mit der Entwässerung 64 nach oben in vertikaler Ausrichtung der Drehachse 60 orientiert ist. In dieser Position findet unter Verschluss des Einlasses 6 und des Auslasses 7 eine Befüllung der Verdichtereinheit 1 mittels eines inkompressiblen Fluids 82, nämlich mittels destillierten oder demineralisierten Wassers statt. Anschließend wird die Verdichtereinheit 1 zurück in die Betriebsposition gedreht und unter Wasser an den Betriebsort transportiert. Schließlich wird unter Entfernung der Verschlüsse des Einlasses 6 und des Auslasses 7 jeweils eine Leitung 80, 81 für ein Fördermedium angeschlossen und es erfolgt ein Anschluss der Kondensatpumpe 67 mit anschließendem Kondensatsammelbehälter an die Entwässerung 64. Vor Inbetriebnahme der Verdichtereinheit 1 wird die Fluidfüllung der Kondensatpumpe 67 aus dem Inneren der Verdichtereinheit 1 abgepumpt.The mounting method according to the invention provides that in a first step, the compressor unit 1 in the
Claims (8)
- Compressor unit (1), in particular for underwater operation, comprising a compressor (3) and an electric motor (2), which compressor unit (1) has a housing (4) with an inlet (6) and an outlet (7) for a pumping medium, having a rotation axis (60) around which a rotor (9) of the compressor unit (1) can rotate,
characterized in that electromagnetic bearings (21, 22, 25) are provided which are cooled to the operating temperature by means of a cooling system (31), wherein the cooling system (31) provides a tap (32) in an overflow of the compressor (3) and a portion of the pumping medium is conveyed from the tap (32) by means of pipelines through a filter (35), and then passed through two separate pipelines to the bearings (21, 22, 25), wherein the rotation axis (60) is aligned vertically during operation and the housing (4) has a drain (64) at an axial end (63) located at the bottom. - Compressor unit (1) according to Claim 1,
characterized in that
surfaces only interior of the compressor unit (1) are designed such that, when aligned vertically for operation, liquids which are located in the interior of the housing (4) flow away because of the force of gravity and reach the drain (64). - Compressor unit (1) according to Claim 2,
characterized in that
surfaces which continue from the drain (64) are inclined in the interior of the compressor unit (1) such that these wetting liquids flow away from the surfaces in the direction of the drain (64), when aligned vertically for operation. - Compressor unit (1) according to one of the preceding claims,
characterized in that
a condensation pump (67) is connected to the drain (64) and carries liquid away. - Compressor unit (1) according to one of the preceding claims,
characterized in that
the housing (4) is mounted in a frame (70) by means of supporting elements which are provided on the housing, with this mounting being configured such that the housing (4) can rotate about a horizontal axis such that the drain (64) changes from a low point to a high point. - Compressor unit (1) according to the preceding Claim 5,
characterized in that
the horizontal axis around which the housing can rotated runs in the area of the rotor center of gravity (68). - Assembly method for a compressor unit (1) according to Claim 1, 2, 3, 4, 5 or 6, which is intended for underwater operation,
characterized in that
the compressor unit (1) is filled above water with an incompressible fluid (82), is transported to an operating location under water, connections are connected to the inlet (6) and to the outlet (7) and the fluid (84) is pumped out of the compressor unit (1) through the drain (64). - Assembly method according to Claim 6,
characterized in that
the fluid (82) is distilled or demineralized water.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP07727244A EP1999380B1 (en) | 2006-03-24 | 2007-03-22 | Compressor unit and assembly method |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP06006065 | 2006-03-24 | ||
EP07727244A EP1999380B1 (en) | 2006-03-24 | 2007-03-22 | Compressor unit and assembly method |
PCT/EP2007/052770 WO2007110378A1 (en) | 2006-03-24 | 2007-03-22 | Compressor unit and assembly method |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1999380A1 EP1999380A1 (en) | 2008-12-10 |
EP1999380B1 true EP1999380B1 (en) | 2011-04-27 |
Family
ID=38068454
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07727244A Not-in-force EP1999380B1 (en) | 2006-03-24 | 2007-03-22 | Compressor unit and assembly method |
Country Status (10)
Country | Link |
---|---|
US (1) | US8714910B2 (en) |
EP (1) | EP1999380B1 (en) |
CN (1) | CN101410628B (en) |
AT (1) | ATE507396T1 (en) |
BR (1) | BRPI0709151A2 (en) |
DE (1) | DE502007007058D1 (en) |
ES (1) | ES2364680T3 (en) |
NO (1) | NO339915B1 (en) |
RU (1) | RU2409770C2 (en) |
WO (1) | WO2007110378A1 (en) |
Families Citing this family (16)
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DE102012204403A1 (en) * | 2012-03-20 | 2013-09-26 | Man Diesel & Turbo Se | Centrifugal compressor unit |
ITCO20120024A1 (en) * | 2012-05-09 | 2013-11-10 | Nuovo Pignone Srl | PRESSURE EQUALIZER |
EP2901016B1 (en) | 2012-09-12 | 2020-10-21 | FMC Technologies, Inc. | Coupling an electric machine and fluid-end |
US9954414B2 (en) | 2012-09-12 | 2018-04-24 | Fmc Technologies, Inc. | Subsea compressor or pump with hermetically sealed electric motor and with magnetic coupling |
US10801309B2 (en) | 2012-09-12 | 2020-10-13 | Fmc Technologies, Inc. | Up-thrusting fluid system |
BR112015005589B1 (en) | 2012-09-12 | 2021-04-20 | Fmc Technologies, Inc | system and method of submersible fluid to operate submerged in a body of water |
WO2014151967A1 (en) | 2013-03-15 | 2014-09-25 | Fmc Technologies, Inc. | Submersible well fluid system |
DE102013214911A1 (en) | 2013-07-30 | 2015-02-05 | Siemens Aktiengesellschaft | Underwater compressor for compressing a gas under water and using the underwater compressor |
DE102013216627A1 (en) * | 2013-08-22 | 2015-02-26 | Robert Bosch Gmbh | Variable speed fluid cooling filter assembly |
DE102015120289A1 (en) * | 2015-11-24 | 2017-05-24 | Hella Kgaa Hueck & Co. | Arrangement of an electric vacuum pump in a vehicle |
US10851803B2 (en) * | 2015-11-30 | 2020-12-01 | Mitsubishi Heavy Industries Compressor Corporation | Multi-stage centrifugal compressor |
ITUA20161464A1 (en) | 2016-03-08 | 2017-09-08 | Nuovo Pignone Tecnologie Srl | Centrifugal compressor without external drainage system, motor compressor and method of avoiding external drainage in a compressor / Centrifugal compressor without external drainage system, motor compressor and method to avoid external drainage in a compressor |
JP6680365B2 (en) | 2016-11-17 | 2020-04-15 | 株式会社Ihi | Centrifugal compressor |
EP3514396A1 (en) | 2018-01-22 | 2019-07-24 | Siemens Aktiengesellschaft | Arrangement with a rotor and two bearings |
CN110360132A (en) * | 2019-08-20 | 2019-10-22 | 西安陕鼓动力股份有限公司 | Integrated form centrifugal compressor and its core pulling method |
CN116677656B (en) * | 2023-07-10 | 2024-01-23 | 江苏科腾环境科技有限公司 | High-safety explosion-proof compressor system |
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DE2223784B1 (en) | 1972-05-16 | 1973-05-24 | Deere & Co | Radial fan with diffuser, especially for the cleaning device of combine harvesters |
SU538155A1 (en) | 1974-12-25 | 1976-12-05 | Курганское Проектно-Конструкторское Бюро | Device for assembling rotary machines |
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DE2807449B1 (en) * | 1978-02-22 | 1979-08-23 | Basf Ag | Process for cleaning multi-stage turbo compressors for gases |
JPS557914A (en) * | 1978-06-30 | 1980-01-21 | Hitachi Ltd | Single-shaft multi-stage centrifugal compressor |
DE3641478A1 (en) | 1986-12-04 | 1988-06-16 | Klein Schanzlin & Becker Ag | HOUSING CARRIER FOR FLOWING MACHINES |
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NO172076C (en) * | 1991-02-08 | 1993-06-02 | Kvaerner Rosenberg As Kvaerner | COMPRESSOR SYSTEM IN AN UNDERWATER STATION FOR TRANSPORTING A BROWN STREAM |
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-
2007
- 2007-03-22 RU RU2008142116/06A patent/RU2409770C2/en not_active IP Right Cessation
- 2007-03-22 US US12/225,520 patent/US8714910B2/en not_active Expired - Fee Related
- 2007-03-22 DE DE502007007058T patent/DE502007007058D1/en active Active
- 2007-03-22 WO PCT/EP2007/052770 patent/WO2007110378A1/en active Application Filing
- 2007-03-22 AT AT07727244T patent/ATE507396T1/en active
- 2007-03-22 BR BRPI0709151-6A patent/BRPI0709151A2/en not_active Application Discontinuation
- 2007-03-22 CN CN200780010582XA patent/CN101410628B/en not_active Expired - Fee Related
- 2007-03-22 ES ES07727244T patent/ES2364680T3/en active Active
- 2007-03-22 EP EP07727244A patent/EP1999380B1/en not_active Not-in-force
-
2008
- 2008-10-21 NO NO20084423A patent/NO339915B1/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
WO2007110378A1 (en) | 2007-10-04 |
BRPI0709151A2 (en) | 2011-06-28 |
EP1999380A1 (en) | 2008-12-10 |
RU2409770C2 (en) | 2011-01-20 |
NO20084423L (en) | 2008-10-21 |
ES2364680T3 (en) | 2011-09-12 |
CN101410628B (en) | 2011-05-25 |
ATE507396T1 (en) | 2011-05-15 |
NO339915B1 (en) | 2017-02-13 |
US20100290896A1 (en) | 2010-11-18 |
RU2008142116A (en) | 2010-04-27 |
CN101410628A (en) | 2009-04-15 |
US8714910B2 (en) | 2014-05-06 |
DE502007007058D1 (en) | 2011-06-09 |
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