EP1999378A1 - Compressor unit and use of a cooling medium - Google Patents
Compressor unit and use of a cooling mediumInfo
- Publication number
- EP1999378A1 EP1999378A1 EP07704565A EP07704565A EP1999378A1 EP 1999378 A1 EP1999378 A1 EP 1999378A1 EP 07704565 A EP07704565 A EP 07704565A EP 07704565 A EP07704565 A EP 07704565A EP 1999378 A1 EP1999378 A1 EP 1999378A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cooling
- compressor unit
- stator
- medium
- compressor
- 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.)
- Withdrawn
Links
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
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
- F04D13/08—Units comprising pumps and their driving means the pump being electrically driven for submerged use
- F04D13/10—Units comprising pumps and their driving means the pump being electrically driven for submerged use adapted for use in mining bore holes
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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
- F04D29/02—Selection of particular materials
- F04D29/023—Selection of particular materials especially 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
- F04D29/00—Details, component parts, or accessories
- F04D29/58—Cooling; Heating; Diminishing heat transfer
- F04D29/5806—Cooling the drive system
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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
- F04D29/58—Cooling; Heating; Diminishing heat transfer
- F04D29/582—Cooling; Heating; Diminishing heat transfer specially adapted for elastic fluid pumps
- F04D29/584—Cooling; Heating; Diminishing heat transfer specially adapted for elastic fluid pumps cooling or heating the machine
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C37/00—Cooling of bearings
- F16C37/005—Cooling of bearings of magnetic bearings
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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
- F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
- F04D29/056—Bearings
- F04D29/058—Bearings magnetic; electromagnetic
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- 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
- F05D2300/00—Materials; Properties thereof
- F05D2300/40—Organic materials
- F05D2300/43—Synthetic polymers, e.g. plastics; Rubber
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2360/00—Engines or pumps
- F16C2360/44—Centrifugal pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C32/00—Bearings not otherwise provided for
- F16C32/04—Bearings not otherwise provided for using magnetic or electric supporting means
- F16C32/0406—Magnetic bearings
- F16C32/044—Active magnetic bearings
- F16C32/0474—Active magnetic bearings for rotary movement
- F16C32/0489—Active magnetic bearings for rotary movement with active support of five degrees of freedom, e.g. two radial magnetic bearings combined with an axial bearing
Definitions
- the invention relates to a compressor unit for compressing a Fordermediums, in particular for underwater operation, comprising a compressor and an electric motor, which comprises a stator and a rotor, wherein the stator of the motor is in communication with a separate cooling and is cooled by the separate cooling which cooling has a cooling medium.
- a compressor unit for compressing a Fordermediums in particular for underwater operation, comprising a compressor and an electric motor, which comprises a stator and a rotor, wherein the stator of the motor is in communication with a separate cooling and is cooled by the separate cooling which cooling has a cooling medium.
- a special Kuhlmediums for cooling a stator of a motor of a compressor unit for operation under water is the subject of the invention.
- a compressor unit of the aforementioned type is already known from international patent application WO 02/099286 A1.
- the compressor unit described therein provides for cooling, that from the Fordermedium, usually natural gas, in the region of an overcurrent of the radial stages of the compressor a Subset is branched off and, by means of which the components to be cooled are lapped, so that the heat loss, which has a magnitude of 100 - 200 kW, is dissipated with the cold medium to be pumped.
- This concept for cooling the compressor unit is particularly advantageous because the transport medium to be transported anyway is used to dissipate the heat loss and no additional media exchange between the compressor unit and other components of the environment must be done.
- this approach involves particular difficulties due to the aggressive chemistry of the media to be conveyed.
- the fluid is heavily contaminated and can affect sensitive components due to the wash in their function. Therefore, for example, the
- a further risk lies in the regularly porous insulation of the stator, which partially absorbs in the area of the circulation the conveying medium passing as cooling medium with the stator, so that it explodes in the event of a sudden drop in pressure, for example when the operation is interrupted Expansions of the absorbed medium in the pores of the insulation comes, which is destroyed as a result.
- the invention has therefore taken on the task of providing cooling for the stator of an electric motor of a motor-driven compressor unit, in particular for subsea operation, on the one hand provides excellent reliability and on the other hand requires no material exchange with the environment during operation.
- a particularly advantageous variant for the operation of the cooling is the use of a Pentaerythrittetracarbonklareesters as a cooling medium of the cooling of the stator of the motor during operation under water.
- the high flash point of pentaerythritol tetracarboxylic acid ester and the associated reduced risk of fire are a significant advantage in the use according to the invention.
- the low corrosion properties and the excellent compatibility with the insulating materials used in these areas such as mica tapes and epoxy resin or impregnating resins.
- pentaerythritol tetracarboxylic esters examples include the ester fluids “Midel” or the “Shell Fluid 4600". These fluids are not just an excellent insulator and with the surrounding materials compatible, but also meet the high fire protection requirements and high environmental requirements, since they are classified in particular as not hazardous to water.
- Cooling has a closed circuit in which the cooling medium (pentaerythritol tetracarboxylic acid ester) circulates. It makes sense if the cooling has a heat exchanger, which by means of a flow line and a
- Return line is in communication with the cooled stator, wherein the cooling is designed such that the cooling medium (pentaerythritol tetracarboxylic) between the heat exchanger, the return line, the stator and the flow line circulates.
- the cooling medium penentaerythritol tetracarboxylic
- the circulation can be driven by means of natural confectioning, so that there is a natural circulation between the aforementioned components of the cooling medium.
- the operation of the circulation of the cooling medium in the forced circulation by means of a pump is preferred. This should not be
- Cooling system for the other elements of the compressor unit.
- the separation of the cooling of the cooling system will meet the special requirements for the heat dissipation from the stator of a generic compressor unit.
- the cooling system which among other things cools the compressor and also the rotor of the motor, provides the conveying medium as a cooling medium in a particularly advantageous manner, so that the heat loss is dissipated with the conveying medium to be compressed.
- This is particularly useful in the subsea of natural gas, since this is regularly relatively cold.
- the rotor can be usefully rewound from the Fordermedium in the open circuit.
- Figure 1 is a schematic representation of a
- Figure 1 shows schematically 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 manifold 8 to be compacted 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 via a
- Compressor rotor 9 of the compressor 3 are united to form 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 by means of a second radial bearing 22 in the lower position.
- a thrust bearing 25 is provided at the upper end of the common shaft 19 - ie at the upper end of the motor rotor 15 - .
- the radial bearings and the thrust bearing work electromagnetically and are each encapsulated.
- the radial bearings extend in the circumferential direction around the respective bearing point the shaft 19 and are in this case 360 ° circumferential 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 overcurrent 33. The to the
- Compressor stages 11 resulting pressure differences ensure a thrust on the compressor rotor 9, which transmits to the motor rotor 15 and against the weight of the resulting entire rotor of the compressor rotor 9 and motor rotor 15, is directed so that in nominal operation as far as possible thrust balance.
- the thrust bearing 25 can be dimensioned comparatively smaller than in a horizontal arrangement of the rotation axis 60th
- the electromagnetic bearings 21, 22, 25 are cooled by means of a cooling system 31 to the operating temperature, wherein the cooling system 31 provides a tap 32 in an overcurrent of the compressor 3. From the tap 32, a portion of the Fordermediums, which is preferably natural gas, passed through a filter 35 and then guided by two separate pipes to the respective outer bearings (first radial bearing 21 and fourth radial bearing 24 and thrust bearing 25) by means of piping. This cooling by means of the cold Fordermediums (80) saves additional supply lines.
- the motor rotor 15 is surrounded by a stator 16 which has a
- Encapsulation 39 so that the aggressive Fordermedium 80 windings of the stator 16 is not damaged.
- the encapsulation is preferably designed so that it can bear the full operating pressure. This is also because a separate cooling 40 is provided for the stator, in which a separate
- Cooling medium (pentaerythritol tetracarboxylic acid ester) 56 circulates.
- a pump 42 provides for a circuit via a heat exchanger 43.
- At least the encapsulation 39 is made such that the portion extending between the stator 16 and the motor rotor 15, although having a thin wall thickness, is capable of withstanding the squeezing pressure upon complete filling of the stator cooling 40 by means of the cooling medium 56 , 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.
- FIG. 2 shows the motor rotor 15, the stator 16 and the cooling 40.
- the cooling 40 has a cooling circuit 50, which is arranged through cooling channels 51, both sides of the cooling channels 51 collecting chambers 52 in these plenums subsequent lines, namely a flow line 53 and a remindlauttechnisch 54 and between the flow line 53 and the return line 54 arranged heat exchanger 55 extends.
- the cooling medium 56 namely a pentaerythritol tetracarboxylic acid ester having the trade name
- Cooling channels 51 of the stator 16 flows through the feed line 53 into the heat exchanger 55, where the cooling medium 56 is cooled by the return line 54 in a located at the return end of the cooling channels 51 plenum 52. The circuit is closed.
- the temperature difference between flow and return is 1OK.
- the heat exchanger is geodetically at the highest point (height difference ⁇ H), so that the natural convection is supported.
- a pump 42 is arranged in the return.
- the stator is sealed and in a gap between the rotor 15 and the stator 16 is carried out by means of the cooling medium 80, which surrounds the rotor 15.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Motor Or Generator Cooling System (AREA)
- Compressor (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
The invention relates to a compressor unit (1) for compressing a delivery medium (62), in particular for underwater operation, comprising a compressor (3) and an electric motor (2) which comprises a stator (16) and a rotor (15), wherein the stator (16) of the motor (2) is connected to a separate cooling means (40) and is cooled by means of the separate cooling means (40), which cooling means (40) has a cooling medium (56). The cooling of machines is particularly difficult in underwater operation on account of the poor accessibility and the imperative not to exchange materials with the surroundings. For the solution, it is proposed that the cooling medium (56) is a pentaerythrite tetracarboxylic acid ester.
Description
Beschreibungdescription
Verdichtereinheit und Verwendung eines KuhlmediumsCompressor unit and use of a Kuhlmediums
Die Erfindung betrifft eine Verdichtereinheit zum Verdichten eines Fordermediums, insbesondere für den Unterwasserbetrieb, umfassend ein Verdichter und einen elektrischen Motor, welcher einen Stator und einen Rotor umfasst, wobei der Stator des Motors mit einer gesonderten Kühlung in Verbindung steht und mittels der gesonderten Kühlung gekühlt wird, welche Kühlung ein Kuhlmedium aufweist. Daneben ist die Verwendung eines besonderen Kuhlmediums für eine Kühlung eines Stators eines Motors einer Verdichtereinheit für den Betrieb unter Wasser Gegenstand der Erfindung.The invention relates to a compressor unit for compressing a Fordermediums, in particular for underwater operation, comprising a compressor and an electric motor, which comprises a stator and a rotor, wherein the stator of the motor is in communication with a separate cooling and is cooled by the separate cooling which cooling has a cooling medium. In addition, the use of a special Kuhlmediums for cooling a stator of a motor of a compressor unit for operation under water is the subject of the invention.
Jüngste Entwicklungen im Bereich des Verdichterbaus konzentrieren sich auch auf Unterseeanordnungen großer Verdichter, welche der Forderung von Erdgasen dienen sollen. Aufgrund der besonderen Betriebsbedingungen, insbesondere wegen der stark eingeschränkten Zuganglichkeit sowohl zu Wartungszwecken als auch mittels Versorgungsleitungen sieht sich die Fachwelt vor große Herausforderungen gestellt. Einschlagige Umweltbestimmungen verbieten jeglichen stofflichen Austausch zwischen den zu installierenden Aggregaten und dem umgebenden Seewasser. Hinzu kommt, dass 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 zusatzlich eine nicht unerhebliche Verschmutzung des teilweise chemisch aggressiven zu fordernden Mediums.Recent developments in the field of compressor construction are also focused on sub-assemblies of large compressors, which are to serve the demand of natural gas. Due to the special operating conditions, in particular because of the severely limited accessibility both for maintenance purposes and by means of supply lines, experts are faced with great challenges. Proper environmental regulations prohibit any material exchange between the units to be installed and the surrounding seawater. In addition, 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. A complicating factor is also a considerable contamination of the partly chemically aggressive medium to be challenged.
Eine Verdichtereinheit der vorgenannten Art ist bereits aus der internationalen Patentanmeldung WO 02/099286 Al bekannt. Die dort beschriebene Verdichtereinheit sieht zur Kühlung vor, dass aus dem Fordermedium, meist Erdgas, im Bereich einer Uberstromung der radialen Stufen des Verdichters eine
Teilmenge abgezweigt wird und, mittels welcher die zu kühlenden Bauelemente umspült werden, so dass die Verlustwärme, die eine Größenordnung von 100 - 200 kW aufweist, mit dem kalten zu fördernden Medium abgeführt wird.A compressor unit of the aforementioned type is already known from international patent application WO 02/099286 A1. The compressor unit described therein provides for cooling, that from the Fordermedium, usually natural gas, in the region of an overcurrent of the radial stages of the compressor a Subset is branched off and, by means of which the components to be cooled are lapped, so that the heat loss, which has a magnitude of 100 - 200 kW, is dissipated with the cold medium to be pumped.
Dieses Konzept zur Kühlung der Verdichtereinheit ist insbesondere deshalb vorteilhaft, da zum Abfuhr der Verlustwärme das ohnehin zu transportierende Fördermedium genutzt wird und kein zusätzlicher Medienaustausch zwischen der Verdichtereinheit und weiteren Komponenten der Umgebung erfolgen muss. Besondere Schwierigkeiten bringt dieses Vorgehen jedoch aufgrund der aggressiven Chemie der zu fördernden Medien mit sich.This concept for cooling the compressor unit is particularly advantageous because the transport medium to be transported anyway is used to dissipate the heat loss and no additional media exchange between the compressor unit and other components of the environment must be done. However, this approach involves particular difficulties due to the aggressive chemistry of the media to be conveyed.
Häufig ist das Fördermedium stark verschmutzt und kann empfindliche Bauteile aufgrund der Umspülung in ihrer Funktion beeinträchtigen. Daher werden beispielsweise dieOften, the fluid is heavily contaminated and can affect sensitive components due to the wash in their function. Therefore, for example, the
Lager, die Axiallager und die Radiallager gekapselt, so dass kein stofflicher Austausch zwischen der Umgebung und diesen Bauteilen stattfindet. Dadurch bedingt müssen Magnetlager eingesetzt werden. Gleiches gilt für den Rotor und den Stator, die in ähnlicher Weise mittels einer Kapselung gegen die aggressiven Fördermedien geschützt sind. Während eine umspülende Kühlung des Rotors ausreichend ist, sind für den Stator weitere Kühlmaßnahmen erforderlich, um die Verlustwärme abzuführen. Eine Lösung aus dem Stand der Technik sieht vor, dass der Stator mit Kühlkanälen versehen ist und das Fördermedium zur Kühlung diese Kanäle durchströmt. Diese Ausbildung birgt das Risiko, dass die Verschmutzungen des Fördermediums im Laufe des Betriebes die Strömung durch die Kanäle beeinträchtigen und diese gegebenenfalls auch verstopfen. Ein weiteres Risiko liegt in der regelmäßig porösen Isolierung des Stators, welche im Bereich der Umspülung das als Kühlmedium mit dem Stator in Kontakt tretende Fördermedium teilweise absorbiert, so dass es bei einem plötzlichen Druckabfall, beispielsweise bei einer Unterbrechung des Betriebes, zu explosionsartigen
Expansionen des absorbierten Mediums in den Poren der Isolation kommt, die infolgedessen zerstört wird.Bearings, the thrust bearings and the radial bearings encapsulated, so that no material exchange between the environment and these components takes place. As a result, magnetic bearings must be used. The same applies to the rotor and the stator, which are protected in a similar manner by means of an encapsulation against the aggressive fluids. While a circulating cooling of the rotor is sufficient, further cooling measures are required for the stator to dissipate the heat loss. A solution of the prior art provides that the stator is provided with cooling channels and the fluid flows through these channels for cooling. This training entails the risk that the contamination of the pumped medium in the course of operation affect the flow through the channels and possibly clog them. A further risk lies in the regularly porous insulation of the stator, which partially absorbs in the area of the circulation the conveying medium passing as cooling medium with the stator, so that it explodes in the event of a sudden drop in pressure, for example when the operation is interrupted Expansions of the absorbed medium in the pores of the insulation comes, which is destroyed as a result.
Die beschriebenen Nachteile mit ihren hohen Risiken für die Verfügbarkeit einer Verdichtereinheit sind insbesondere für den Unterwasserbetrieb, beispielsweise bei der Erdgasförderung, absolut inakzeptabel.The disadvantages described with their high risks for the availability of a compressor unit are absolutely unacceptable, in particular for underwater operation, for example in natural gas production.
Die Erfindung hat es sich daher zur Aufgabe gemacht, eine Kühlung für den Stator eines Elektromotors einer motorbetrieben Verdichtereinheit, insbesondere für den Unterseebetrieb, zu schaffen, die einerseits eine hervorragende Betriebssicherheit bietet und andererseits keinen stofflichen Austausch mit der Umgebung während des Betriebes erfordert.The invention has therefore taken on the task of providing cooling for the stator of an electric motor of a motor-driven compressor unit, in particular for subsea operation, on the one hand provides excellent reliability and on the other hand requires no material exchange with the environment during operation.
Zur Lösung wird eine Verdichtereinheit nach Anspruch 1 und die Verwendung eines Pentaerythrittetracarbonsäureesters als Kühlmedium nach Anspruch 11 vorgeschlagen. Die Unteransprüche beinhalten jeweils vorteilhafte Weiterbildungen der Erfindung .For solution, a compressor unit according to claim 1 and the use of a Pentaerythrittetracarbonsäureesters is proposed as a cooling medium according to claim 11. The subclaims each contain advantageous developments of the invention.
Eine besonders vorteilhafte Variante zum Betrieb der Kühlung ist die Verwendung eines Pentaerythrittetracarbonsäureesters als Kühlmedium der Kühlung des Stators des Motors beim Betrieb unter Wasser.A particularly advantageous variant for the operation of the cooling is the use of a Pentaerythrittetracarbonsäureesters as a cooling medium of the cooling of the stator of the motor during operation under water.
Daneben sind der hohe Flammpunkt des Pentaerythrittetracarbonsäureesters und die damit einhergehende reduzierte Brandgefahr ein gewichtiger Vorteil bei der erfindungsgemäßen Verwendung. Hinzu kommen die geringe Korrosionseigenschaft und die hervorragende Verträglichkeit mit den in diesen Bereichen verwendeten Isoliermaterialen, wie zum Beispiel Glimmerbändern und Epoxidharz bzw. Tränkharze.In addition, the high flash point of pentaerythritol tetracarboxylic acid ester and the associated reduced risk of fire are a significant advantage in the use according to the invention. In addition, the low corrosion properties and the excellent compatibility with the insulating materials used in these areas, such as mica tapes and epoxy resin or impregnating resins.
Als Beispiel für Pentaerythrittetracarbonsäureester sind die Esterflüssigkeiten „Midel" oder das „Shell Fluid 4600" zu nennen. Diese Flüssigkeiten sind jeweils nicht nur ein hervorragender Isolator und mit den umgebenden Materialen
verträglich, sondern entsprechen auch den hohen Brandschutzanforderungen sowie hohen Anforderungen an die Umweltverträglichkeit, da sie insbesondere als nicht wassergefährdend einzustufen sind.Examples of pentaerythritol tetracarboxylic esters include the ester fluids "Midel" or the "Shell Fluid 4600". These fluids are not just an excellent insulator and with the surrounding materials compatible, but also meet the high fire protection requirements and high environmental requirements, since they are classified in particular as not hazardous to water.
Insbesondere der Empfindlichkeit des Stators gegenIn particular, the sensitivity of the stator against
Verschmutzung wird Rechnung getragen, wenn die Kühlung einen geschlossenen Kreislauf aufweist, in dem das Kühlmedium (Pentaerythrittetracarbonsäureester) umläuft. Hierbei ist es sinnvoll, wenn die Kühlung einen Wärmetauscher aufweist, welcher mittels einer Vorlaufleitung und einerPollution is taken into account when the cooling has a closed circuit in which the cooling medium (pentaerythritol tetracarboxylic acid ester) circulates. It makes sense if the cooling has a heat exchanger, which by means of a flow line and a
Rücklaufleitung mit dem gekühlten Stator in Verbindung steht, wobei die Kühlung derart ausgebildet ist, dass das Kühlmedium (Pentaerythrittetracarbonsäureester) zwischen dem Wärmetauscher, der Rücklaufleitung, dem Stator und der Vorlaufleitung zirkuliert.Return line is in communication with the cooled stator, wherein the cooling is designed such that the cooling medium (pentaerythritol tetracarboxylic) between the heat exchanger, the return line, the stator and the flow line circulates.
Die Zirkulation kann mittels natürlicher Konfektion angetrieben sein, so dass sich ein Naturumlauf zwischen den vorgenannten Bauelementen des Kühlmediums ergibt. Bevorzugt wird jedoch der Betrieb des Kreislaufs des Kühlmediums im Zwangsumlauf mittels einer Pumpe. Hierbei sollte keinThe circulation can be driven by means of natural confectioning, so that there is a natural circulation between the aforementioned components of the cooling medium. However, the operation of the circulation of the cooling medium in the forced circulation by means of a pump is preferred. This should not be
Phasenwechsel erfolgen, dies gewährleistet einen besonders weiten thermischen Einsatzbereich.Phase change, this ensures a particularly wide thermal range.
Besonders zweckmäßig im Sinne der Erfindung sind einerseits eine gesonderte Kühlung für den Stator des elektrischen Motors der Verdichtereinheit und andererseits ein anderesParticularly useful in the context of the invention are on the one hand a separate cooling for the stator of the electric motor of the compressor unit and on the other hand another
Kühlsystem für die weiteren Elemente der Verdichtereinheit. Die Trennung der Kühlung von dem Kühlsystem wird den besonderen Anforderungen an die Wärmeabfuhr aus dem Stator einer gattungsgemäßen Verdichtereinheit gerecht.Cooling system for the other elements of the compressor unit. The separation of the cooling of the cooling system will meet the special requirements for the heat dissipation from the stator of a generic compressor unit.
Das Kühlsystem, welches unter anderem den Verdichter und auch den Rotor des Motors kühlt, sieht als Kühlmedium besonders vorteilhaft das Fördermedium vor, so dass die Verlustwärme mit dem zu verdichtenden Fördermedium abgeführt wird. Dies ist besonders bei der Unterseeförderung von Erdgas zweckmäßig, da dieses regelmäßig verhältnismäßig kalt ist.
Insbesondere der Rotor kann sinnvoll von dem Fordermedium in dem offenen Kreislauf umspult werden.The cooling system, which among other things cools the compressor and also the rotor of the motor, provides the conveying medium as a cooling medium in a particularly advantageous manner, so that the heat loss is dissipated with the conveying medium to be compressed. This is particularly useful in the subsea of natural gas, since this is regularly relatively cold. In particular, the rotor can be usefully rewound from the Fordermedium in the open circuit.
Im Folgenden wird die Erfindung anhand eines speziellen Ausfuhrungsbeispiels unter Bezugnahme auf Zeichnungen naher erläutert. Es zeigen:In the following the invention will be explained in more detail with reference to a specific embodiment with reference to drawings. Show it:
Figur 1 eine schematische Darstellung einesFigure 1 is a schematic representation of a
Längsschnitts durch eine erfindungsgemaße Verdichtereinheit .Longitudinal section through a compressor unit according to the invention.
Figur 1 zeigt schematisch einen Schnitt längs einer erfindungsgemaßen Verdichtereinheit 1, welche als wesentliche Bauteile einen Motor 2 und einen Verdichter 3 in einem gasdicht ausgebildeten Gehäuse 4 aufweist. Das Gehäuse 4 beherbergt den Motor 2 und den Verdichter 3. Im Bereich des Übergang von dem Motor 2 zu dem Verdichter 3 ist das Gehäuse 4 mit einem Einlass 6 und einem Auslass 7 versehen, wobei durch den Einlass 6 mittels eines Ansaugstutzens 8 das zu verdichtende Fluid angesaugt wird und durch den Auslass 7 das verdichtete Fluid abströmt.Figure 1 shows schematically 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. In the area of the transition from the engine 2 to 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 manifold 8 to be compacted Fluid is sucked and flows through the outlet 7, the compressed fluid.
Die Verdichtereinheit 1 ist im Betrieb vertikal angeordnet, wobei ein Motorrotor 15 des Motors 2 über einemThe compressor unit 1 is arranged vertically in operation, wherein a motor rotor 15 of the motor 2 via a
Verdichterrotor 9 des Verdichters 3 zu einer gemeinsamen Welle 19 vereint sind, die sich um eine gemeinsame vertikale Drehachse 60 dreht.Compressor rotor 9 of the compressor 3 are united to form a common shaft 19 which rotates about a common vertical axis of rotation 60.
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 mittels eines zweiten Radiallagers 22 in unterer Position gelagert.The compressor rotor 9 is mounted by means of 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 und das Axiallager arbeiten elektromagnetisch und sind jeweils gekapselt ausgeführt. Die Radiallager 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 - ie at the upper end of the motor rotor 15 - a thrust bearing 25 is provided. The radial bearings and the thrust bearing work electromagnetically and are each encapsulated. The radial bearings extend in the circumferential direction around the respective bearing point the shaft 19 and are in this case 360 ° circumferential and undivided.
Der als Zentrifugalverdichter ausgebildete Verdichter 3 weist drei Verdichterstufen 11 auf, die jeweils mittels einer Uberstromung 33 in Verbindung stehen. Die sich an denThe compressor 3 designed as a centrifugal compressor has three compressor stages 11 which are in each case connected by means of an overcurrent 33. The to the
Verdichterstufen 11 ergebenen Druckdifferenzen sorgen für einen Schub an dem Verdichterrotor 9, der sich auf dem Motorrotor 15 übertragt 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 bei einer horizontalen Anordnung der Drehachse 60.Compressor stages 11 resulting pressure differences ensure a thrust on the compressor rotor 9, which transmits to the motor rotor 15 and against the weight of the resulting entire rotor of the compressor rotor 9 and motor rotor 15, is directed so that in nominal operation as far as possible thrust balance. In this way, the thrust bearing 25 can be dimensioned comparatively smaller than in a horizontal arrangement of the rotation axis 60th
Die elektromagnetischen Lager 21, 22, 25 sind mittels eines Kuhlsystems 31 auf Betriebstemperatur gekühlt, wobei das Kuhlsystem 31 eine Anzapfung 32 in einer Uberstromung des Verdichters 3 vorsieht. Von der Anzapfung 32 wird mittels Rohrleitungen ein Teil des Fordermediums, welches vorzugsweise Erdgas ist, durch einen Filter 35 geleitet und anschließend durch zwei separate Rohrleitungen zu den jeweils äußeren Lagerstellen (erstes Radiallager 21 und viertes Radiallager 24 sowie Axiallager 25) gefuhrt. Diese Kühlung mittels des kalten Fordermediums (80) erspart zusatzliche Versorgungsleitungen .The electromagnetic bearings 21, 22, 25 are cooled by means of a cooling system 31 to the operating temperature, wherein the cooling system 31 provides a tap 32 in an overcurrent of the compressor 3. From the tap 32, a portion of the Fordermediums, which is preferably natural gas, passed through a filter 35 and then guided by two separate pipes to the respective outer bearings (first radial bearing 21 and fourth radial bearing 24 and thrust bearing 25) by means of piping. This cooling by means of the cold Fordermediums (80) saves additional supply lines.
Der Motorrotor 15 ist von einem Stator 16 umgeben, der eineThe motor rotor 15 is surrounded by a stator 16 which has a
Kapselung 39 aufweist, so dass das aggressive Fordermedium 80 Wicklungen des Stators 16 nicht beschädigt. Die Kapselung ist hierbei bevorzugt so ausgelegt, dass sie den vollen Betriebsdruck zu ertragen vermag. Dies auch deshalb, weil eine separate Kühlung 40 für den Stator vorgesehen ist, in der ein eigenesEncapsulation 39, so that the aggressive Fordermedium 80 windings of the stator 16 is not damaged. In this case, the encapsulation is preferably designed so that it can bear the full operating pressure. This is also because a separate cooling 40 is provided for the stator, in which a separate
Kuhlmedium (Pentaerythrittetracarbonsaureester) 56 zirkuliert. Eine Pumpe 42 sorgt hierbei für einen Kreislauf über einen Wärmetauscher 43.
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 56 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.Cooling medium (pentaerythritol tetracarboxylic acid ester) 56 circulates. A pump 42 provides for a circuit via a heat exchanger 43. At least the encapsulation 39 is made such that the portion extending between the stator 16 and the motor rotor 15, although having a thin wall thickness, is capable of withstanding the squeezing pressure upon complete filling of the stator cooling 40 by means of the cooling medium 56 , In this way, larger eddy current losses are avoided in this area and the efficiency of the overall arrangement improves.
Der Verdichterrotor 9 weist zweckmäßig eine Verdichterwelle 10 auf, auf der die einzelnenThe compressor rotor 9 expediently has a compressor shaft 10, on which the individual
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.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.
Figur 2 zeigt den Motorrotor 15, den Stator 16 und die Kühlung 40. Die Kühlung 40 weist einen Kühlkreislauf 50 auf, welcher sich durch Kühlkanäle 51, beidseitig der Kühlkanäle 51 angeordnete Sammelräume 52 sich in diese Sammelräume anschließende Leitungen, nämlich eine Vorlaufleitung 53 und eine Rücklautleitung 54 sowie zwischen der Vorlaufleitung 53 und der Rücklaufleitung 54 angeordneten Wärmetauscher 55 erstreckt. Das Kühlmedium 56, nämlich ein Pentaerythrittetracarbonsäureester mit dem HandelsnamenFigure 2 shows the motor rotor 15, the stator 16 and the cooling 40. The cooling 40 has a cooling circuit 50, which is arranged through cooling channels 51, both sides of the cooling channels 51 collecting chambers 52 in these plenums subsequent lines, namely a flow line 53 and a Rücklautleitung 54 and between the flow line 53 and the return line 54 arranged heat exchanger 55 extends. The cooling medium 56, namely a pentaerythritol tetracarboxylic acid ester having the trade name
„Midel", strömt beginnend in Kühlkanälen 51 des Stators 16, durch die Vorlaufleitung 53 in den Wärmetauscher 55, wo das Kühlemedium 56 abgekühlt wird durch die Rücklaufleitung 54 in einen am rücklaufseitigen Ende der Kühlkanäle 51 befindlichen Sammelraum 52 einströmt. Der Kreislauf ist geschlossen."Midel" flows starting in cooling channels 51 of the stator 16, flows through the feed line 53 into the heat exchanger 55, where the cooling medium 56 is cooled by the return line 54 in a located at the return end of the cooling channels 51 plenum 52. The circuit is closed.
Vorzugsweise ist die Temperaturdifferenz zwischen Vor- und Rücklauf 1OK. Der Wärmetauscher befindet sich geodätisch am höchsten Punkt (Höhendifferenz ΔH) , so dass die natürliche Konvektion unterstützt. Eine Pumpe 42 ist im Rücklauf angeordnet. Der Stator ist gekapselt und in einem Spalt
zwischen dem Rotor 15 und dem Stator 16 erfolgt eine Kühlung mittels des Fördermediums 80, das den Rotor 15 umspült.
Preferably, the temperature difference between flow and return is 1OK. The heat exchanger is geodetically at the highest point (height difference ΔH), so that the natural convection is supported. A pump 42 is arranged in the return. The stator is sealed and in a gap between the rotor 15 and the stator 16 is carried out by means of the cooling medium 80, which surrounds the rotor 15.
Claims
1. Verdichtereinheit (1) zum Verdichten eines Fördermediums (62), insbesondere für den Unterwasserbetrieb, umfassend ein Verdichter (3) und einen elektrischen Motor (2), welcher einen Stator (16) und einen Rotor (15) umfasst, wobei der Stator (16) des Motors (2) mit einer gesonderten Kühlung (40) in Verbindung steht und mittels der gesonderten Kühlung (40) gekühlt wird, welche Kühlung (40) ein Kühlmedium (56) aufweist, dadurch gekennzeichnet, dass das Kühlmedium (56) einCompressor unit (1) for compressing a pumped medium (62), in particular for underwater operation, comprising a compressor (3) and an electric motor (2), which comprises a stator (16) and a rotor (15), wherein the stator (16) of the motor (2) with a separate cooling (40) and is cooled by means of the separate cooling (40), which cooling (40) comprises a cooling medium (56), characterized in that the cooling medium (56) one
Pentaerythrittetracarbonsäureester ist .Pentaerythrittetracarbonsäureester is.
2. Verdichtereinheit nach Anspruch 1, dadurch gekennzeichnet, dass der Carbonsäurerest linear und einfach2. Compressor unit according to claim 1, characterized in that the carboxylic acid radical linear and simple
Methyl-verzweigt ist.Is methyl branched.
3. Verdichtereinheit nach Anspruch 2, dadurch gekennzeichnet, dass der Carbonsäurerest eine mittlere C-Zahl ≥ 7 aufweist .3. compressor unit according to claim 2, characterized in that the carboxylic acid radical has an average C number ≥ 7.
4. Verdichtereinheit (1) nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass das die Kühlung (40) einen geschlossenen Kreislauf (Kühlkreislauf 50) aufweist, in dem das Kühlmedium (56) umläuft.4. compressor unit (1) according to one of the preceding claims, characterized in that the cooling (40) has a closed circuit (cooling circuit 50) in which the cooling medium (56) rotates.
5. Verdichtereinheit (1) nach Anspruch 1, dadurch gekennzeichnet, dass das die Kühlung (40) einen Wärmetauscher (55) aufweist, welcher mittels einer Vorlaufleitung (53) und einer Rücklaufleitung (54) mit dem gekühlten Stator (16) in Verbindung steht, wobei die Kühlung (40) derart ausgebildet ist, dass das Kühlmedium (56) zwischen dem Wärmetauscher (55), der Rücklaufleitung (54), dem Stator (16) und der Vorlaufleitung (53) zirkuliert. 5. compressor unit (1) according to claim 1, characterized in that the cooling (40) has a heat exchanger (55) which communicates by means of a flow line (53) and a return line (54) with the cooled stator (16) wherein the cooling (40) is configured such that the cooling medium (56) circulates between the heat exchanger (55), the return line (54), the stator (16) and the feed line (53).
6. Verdichtereinheit (1) nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass das in der Rücklaufleitung (54) eine Pumpe (61) vorgesehen ist, welche das Kühlmedium (56) fördert, so dass ein Zwangsumlauf erfolgt.6. compressor unit (1) according to one of the preceding claims, characterized in that in the return line (54) a pump (61) is provided, which promotes the cooling medium (56), so that a forced circulation takes place.
7. Verdichtereinheit (1) nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass die Kühlung für den maximalen Betriebsdruck ausgelegt ist.7. compressor unit (1) according to one of the preceding claims, characterized in that the cooling is designed for the maximum operating pressure.
8. Verdichtereinheit (1) nach Anspruch 1, dadurch gekennzeichnet, dass der Verdichter (3), Lager (Radiallager 21 - 24, Axiallager 25) der Verdichtereinheit (1) und der Rotor (15) des Motors (2) mit einem weiteren Kühlsystem in Verbindung stehen und mittels dieses Kühlsystems gekühlt werden.8. compressor unit (1) according to claim 1, characterized in that the compressor (3), bearings (radial bearings 21 - 24, thrust bearing 25) of the compressor unit (1) and the rotor (15) of the motor (2) with a further cooling system be connected and cooled by means of this cooling system.
9. Verdichtereinheit (1) nach Anspruch 2, dadurch gekennzeichnet, dass das Kühlsystem (31) ein Kühlmedium aufweist, welches das Fördermedium ist.9. compressor unit (1) according to claim 2, characterized in that the cooling system (31) comprises a cooling medium, which is the conveying medium.
10. Verdichtereinheit (1) nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass das Fördermedium Erdgas ist.10. compressor unit (1) according to one of the preceding claims, characterized in that the conveying medium is natural gas.
11. Verdichtereinheit (1) nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass das Kühlsystem (31) derart ausgebildet ist, dass der11. compressor unit (1) according to one of the preceding claims, characterized in that the cooling system (31) is designed such that the
Rotor (15) von dem Kühlmedium umspült wird.Rotor (15) is washed by the cooling medium.
12. Verwendung eines Pentaerythrittetracarbonsäureester als Kühlmedium (56) einer Kühlung (40) für einen Stator (16) eines Motors (2) einer Verdichtereinheit (1) für den Betrieb unter Wasser. 12. Use of a Pentaerythrittetracarbonsäureester as a cooling medium (56) a cooling (40) for a stator (16) of a motor (2) of a compressor unit (1) for operation under water.
13. Verwendung nach Anspruch 12, dadurch gekennzeichnet, dass der Carbonsäurerest des Pentaerythrittetracarbonsäureester linear und einfach Methyl-verzweigt ist.13. Use according to claim 12, characterized in that the carboxylic acid radical of the pentaerythritol tetracarboxylic acid ester is linear and simply methyl-branched.
14. Verwendung nach Anspruch 13, dadurch gekennzeichnet, dass der Carbonsäurerest eine mittlere C-Zahl >7 aufweist.14. Use according to claim 13, characterized in that the carboxylic acid radical has an average C number> 7.
15. Verwendung nach Anspruch 12, 13 oder 14, dadurch gekennzeichnet, dass die Kühlung im Zwangsumlauf betrieben wird. 15. Use according to claim 12, 13 or 14, characterized in that the cooling is operated in forced circulation.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP07704565A EP1999378A1 (en) | 2006-03-24 | 2007-02-13 | Compressor unit and use of a cooling medium |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP06006069 | 2006-03-24 | ||
EP07704565A EP1999378A1 (en) | 2006-03-24 | 2007-02-13 | Compressor unit and use of a cooling medium |
PCT/EP2007/051393 WO2007110271A1 (en) | 2006-03-24 | 2007-02-13 | Compressor unit and use of a cooling medium |
Publications (1)
Publication Number | Publication Date |
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EP1999378A1 true EP1999378A1 (en) | 2008-12-10 |
Family
ID=38057555
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP07704565A Withdrawn EP1999378A1 (en) | 2006-03-24 | 2007-02-13 | Compressor unit and use of a cooling medium |
Country Status (7)
Country | Link |
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US (1) | US20100232984A1 (en) |
EP (1) | EP1999378A1 (en) |
CN (1) | CN101410626A (en) |
BR (1) | BRPI0709178A2 (en) |
NO (1) | NO20084447L (en) |
RU (1) | RU2394172C1 (en) |
WO (1) | WO2007110271A1 (en) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
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EP2103810A1 (en) | 2008-03-19 | 2009-09-23 | Siemens Aktiengesellschaft | Compressor unit |
DE102008031994B4 (en) | 2008-04-29 | 2011-07-07 | Siemens Aktiengesellschaft, 80333 | Fluid energy machine |
US8513826B2 (en) * | 2008-06-26 | 2013-08-20 | Ed Mazur | Wind turbine |
SG178355A1 (en) * | 2009-08-11 | 2012-03-29 | Gen Electric | Permanent magnet motor for subsea pump drive |
FR2966528B1 (en) * | 2010-10-25 | 2016-12-30 | Thermodyn | CENTRIFUGAL COMPRESSOR GROUP |
US9777746B2 (en) * | 2013-09-03 | 2017-10-03 | Dresser-Rand Company | Motor cooling system manifold |
JP6184018B2 (en) * | 2014-02-06 | 2017-08-23 | 三菱重工業株式会社 | Intermediate suction diaphragm and centrifugal rotating machine |
JP2016156282A (en) * | 2015-02-23 | 2016-09-01 | 三菱重工業株式会社 | Compressor system |
JP6642189B2 (en) * | 2016-03-29 | 2020-02-05 | 三菱重工コンプレッサ株式会社 | Centrifugal compressor |
BR112021009442A8 (en) * | 2018-11-19 | 2021-09-08 | Smart E Llc | Lubrication-free centrifugal compressor |
CN110118184B (en) * | 2019-06-19 | 2020-12-11 | 徐州精一泵业有限公司 | Full-dry submersible electric pump with cooperative sealing system |
CN111637341A (en) * | 2020-05-26 | 2020-09-08 | 南京林业大学 | Intelligent function control device suitable for old people and home |
Family Cites Families (3)
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DE4437007A1 (en) * | 1994-10-15 | 1996-04-18 | Roehm Gmbh | Biodegradable oligoesters suitable as lubricants |
NL1018212C2 (en) * | 2001-06-05 | 2002-12-10 | Siemens Demag Delaval Turbomac | Compressor unit comprising a centrifugal compressor and an electric motor. |
DE10158757A1 (en) * | 2001-11-29 | 2003-06-18 | Siemens Ag | marine propulsion |
-
2007
- 2007-02-13 US US12/225,325 patent/US20100232984A1/en not_active Abandoned
- 2007-02-13 EP EP07704565A patent/EP1999378A1/en not_active Withdrawn
- 2007-02-13 RU RU2008142100/06A patent/RU2394172C1/en not_active IP Right Cessation
- 2007-02-13 WO PCT/EP2007/051393 patent/WO2007110271A1/en active Application Filing
- 2007-02-13 CN CNA2007800106625A patent/CN101410626A/en active Pending
- 2007-02-13 BR BRPI0709178-8A patent/BRPI0709178A2/en not_active IP Right Cessation
-
2008
- 2008-10-22 NO NO20084447A patent/NO20084447L/en not_active Application Discontinuation
Non-Patent Citations (1)
Title |
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See references of WO2007110271A1 * |
Also Published As
Publication number | Publication date |
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RU2008142100A (en) | 2010-04-27 |
WO2007110271A1 (en) | 2007-10-04 |
NO20084447L (en) | 2008-12-16 |
US20100232984A1 (en) | 2010-09-16 |
RU2394172C1 (en) | 2010-07-10 |
CN101410626A (en) | 2009-04-15 |
BRPI0709178A2 (en) | 2011-06-28 |
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