WO2011017783A2 - High-pressure multistage centrifugal compressor - Google Patents

High-pressure multistage centrifugal compressor Download PDF

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Publication number
WO2011017783A2
WO2011017783A2 PCT/BE2010/000054 BE2010000054W WO2011017783A2 WO 2011017783 A2 WO2011017783 A2 WO 2011017783A2 BE 2010000054 W BE2010000054 W BE 2010000054W WO 2011017783 A2 WO2011017783 A2 WO 2011017783A2
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WO
WIPO (PCT)
Prior art keywords
compressor
multistage centrifugal
elements
pressure
pressure multistage
Prior art date
Application number
PCT/BE2010/000054
Other languages
French (fr)
Other versions
WO2011017783A3 (en
Inventor
Erik Paul Fabry
Sven Bert Serbruyns
Original Assignee
Atlas Copco Airpower, Naamloze Vennootschap
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from BE2010/0180A external-priority patent/BE1019254A3/en
Application filed by Atlas Copco Airpower, Naamloze Vennootschap filed Critical Atlas Copco Airpower, Naamloze Vennootschap
Publication of WO2011017783A2 publication Critical patent/WO2011017783A2/en
Publication of WO2011017783A3 publication Critical patent/WO2011017783A3/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/16—Combinations of two or more pumps ; Producing two or more separate gas flows
    • 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
    • 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
    • F04D25/0606—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump

Definitions

  • the present invention concerns a high-pressure multistage centrifugal compressor.
  • the invention concerns a high-pressure multistage centrifugal compressor comprising at least three compressor elements, each consisting of at least one rotor body mounted on a rotor shaft in a stator housing having an inlet and an outlet, as well as at least two electric motors for driving the rotor shaft of the compressor elements, whereby each of the three compressor elements is connected, at least with its inlet or its outlet, to the inlet or the outlet of one of the other compressor elements .
  • the invention is related to said high-pressure multistage centrifugal compressor, whereby in order to form a high-pressure stage at least one compressor element is placed in series connection with another compressor element by being connected with its inlet to the outlet of the other compressor element, and whereby each of said electric motors is driving the rotor shaft of one of said compressor elements in series connection, and whereby a first of said electric motors is also driving another one of the three compressor elements.
  • the present invention therefore aims to offer a solution to one or more of the aforementioned and other problems.
  • the present invention concerns a high-pressure multistage centrifugal compressor of the type described above, which is provided with a fourth compressor element that is driven by the other, second electric motor, and which fourth compressor element is connected with its inlet or outlet to the inlet or outlet of a compressor element which is driven by said first electric motor.
  • a first advantage of such a high-pressure multistage centrifugal compressor according to the invention, whereby four compressor elements are driven by two electric motors, is that a uniform load distribution over both electric motors can be realized more easily than with the known multistage compressors, since each of the electric motors drives the rotor shafts of two out of four compressor elements .
  • Yet another important aspect of such a high-pressure multistage centrifugal compressor according to the invention consists in that the fourth compressor element, which is driven by the second electric motor, is connected to a compressor element which is driven by the first electric motor.
  • At least two of the four said compressor elements are placed in parallel connection by having their respective outlets mutually connected.
  • Such an embodiment is particularly advantageous in cases where two low-pressure stages at the entry of the compressor are connected in parallel in said way, since in this way a larger flow of non-compressed air can be taken in with compressor elements having relatively smaller dimensions than in case the same flow has to be guaranteed with only one compressor element.
  • three of said compressor elements are placed in series connection forming three consecutive stages of the compressor, more specifically a first compressor element forming a low-pressure stage, a second compressor element forming an intermediate stage, and a third compressor element forming a high-pressure stage, respectively.
  • An extremely interesting embodiment consists of a combination of the characteristics of the two last- mentioned embodiments whereby a fourth compressor element is connected in parallel to the first compressor element for extending of said low-pressure stage.
  • each of the rotor shafts of the two said compressor elements that are connected in parallel is driven by another of said two electric motors.
  • figure 1 represents schematically the most preferred embodiment of a high-pressure multistage centrifugal compressor according to the invention.
  • the high-pressure multistage centrifugal compressor 1 is composed of four compressor elements, 2 to 5, and two electric motors, more specifically, a first electric motor 6 and a second electric motor 7.
  • the compressor elements 2 to 5 are of the centrifugal type and each consist of a rotor body 8 mounted on a rotor shaft 9 in a stator 10.
  • each compressor element 2 to 5 is additionally provided with an inlet 11 extending axially and an outlet 12 directing radially, whereby each of the compressor elements 2 to 5 is connected, at least with its inlet 11 or its outlet 12, to the inlet 11 or the outlet 12 of one of the other compressor elements 2 to 5.
  • the three compressor elements 2 , 3 and 4 are placed in series connection forming three consecutive pressure stages of the compressor 1.
  • the first compressor element 2 forms a low-pressure stage at the entry of the compressor 1, whereby non- compressed air is sucked in at the inlet 11 of the compressor element 2.
  • the second compressor element 3 is connected by means of a conduct 13 with its entry 11 to the outlet 12 of the first compressor element 2 for forming an intermediate pressure stage of the compressor 1.
  • the third compressor element 4 is connected by means of a conduct 13 with its inlet 11 to the outlet 12 of the second compressor element 3 for forming a high-pressure stage of the compressor 1.
  • an intercooler 14 is preferably provided between at least two compressor elements placed in series connection, forming consecutive pressure stages of the compressor 1.
  • an intercooler 14 is provided in the conducts 13 between each pair of serially connected compressor elements 2 to 4.
  • Such an intercooler 14 can, for instance, consist of a radiator through which the compressed gas flows and which is cooled, for example, by ambient air supplied by a ventilator.
  • Another possibility consists of, for example, cooling the compressed gas with a secondary cooling circuit through which cooling water flows.
  • the fourth compressor element 5 is connected in parallel to the first compressor element 2, whereby, more particularly the outlet 12 of the fourth compressor element 5 is connected by means of a conduct 13 to the outlet 12 of the first compressor element 2.
  • the low-pressure stage of the compressor 1 is doubled in this way, whereby the inlet 11 of the first compressor element 2 and the inlet 11 of the fourth compressor element 5 jointly constitute the sucking side of the compressor 1.
  • Each of the electric motors is coupled with its motor shaft to a rotor shaft 9 of one of the serially connected compressor elements.
  • the second electric motor 7 is driving the third compressor element 4, while the first electric motor 6 is driving the second compressor element 3 which is connected in series with the third compressor element 4.
  • the first electric motor 5 also drives the first compressor element 2.
  • Characterizing for the invention is that a fourth compressor element 5 is provided which is also driven by the second electric motor 7, whereby this fourth compressor element 5 in some way also affects the load of the first electric motor 6, since the outlet 12 of the fourth compressor element 5 is connected to the outlet 12 of the first compressor element 2 which is driven by the first electric motor 6.
  • At least one of the electric motors 6 and 7 is preferably a high-speed motor, and even more preferably, both electric motors 6 and 7 are highspeed motors .
  • Yet another preferred aspect of the invention consists in making use of electric motors 6 and 7 which are identical, whereby, in other words, the electromagnetic stator part, the bearings and the cooling of the electric motors 6 and 7 are construed identically.
  • the rotor shaft 9 of a compressor element 2 to 5 is preferably directly coupled to a drive shaft of one of the electric motors 6 and 7, without making use of any intermediate gear transmission.
  • all kinds of variants of other embodiments are also not excluded. For example, it is possible to connect at least two of the four compressor elements 2 to 5 in parallel by mutually- connecting their respective inlets 11.
  • a compressor 1 according to the invention can be realized having several exits, for example with the intention of being able to serve different consumers or the like.
  • compressor elements 2 to 5 in parallel, by mutually coupling either their inlets 11 or their outlets 12, can also be combined.
  • a high- pressure multistage centrifugal compressor such that two out of the four aforementioned compressor elements 2 to 5 are connected in parallel by having their corresponding inlets 11 interconnected, and that the two other of said four compressor elements 2 to 5 are connected in parallel by having their respecive outlets 12 interconnected.
  • the driving of the rotor shafts 9 of the compressor elements 2 to 5 can also be realized in different ways than is represented in figure 1. For example, it is not excluded that the rotor shaft 9 of two compressor elements 2 to 5, that are connected in parallel, each are driven by one and the same of the two electric motors 6 of 7.
  • a high-pressure multistage centrifugal compressor may be obtained in which all four of said compressor elements 2 to 5 are placed in series connection forming four consecutive stages of the compressor 1.
  • an arrangement can be selected in which the first electric motor 6 is driving a first low-pressure compressor element and a third compressor element of the third pressure stage of the compressor, while the second electric motor is driving the second compressor element as well as the fourth compressor element of the last stage.
  • the invention is by no means limited to the embodiment of a high-pressure multistage centrifugal compressor 1, described by way of example and represented in the figure, however such a high-pressure multistage centrifugal compressor 1 according to the invention can be realized according to all kinds of variants while without departing from the scope of the invention.

Abstract

High-pressure multistage centrifugal compressor comprising at least three compressor elements, as well as at least two motors to drive the elements, whereby at least one element is placed in series connection with another element, whereby each of said motors is driving one of said elements in series, whereby a first of said motors is also driving a third element, and whereby the compressor is provided with a fourth compressor element which is driven by the second motor and which is connected via its inlet or outlet to the inlet or outlet of an element driven by the first motor.

Description

High-pressure multistage centrifugal compressor.
The present invention concerns a high-pressure multistage centrifugal compressor.
More specifically, the invention concerns a high-pressure multistage centrifugal compressor comprising at least three compressor elements, each consisting of at least one rotor body mounted on a rotor shaft in a stator housing having an inlet and an outlet, as well as at least two electric motors for driving the rotor shaft of the compressor elements, whereby each of the three compressor elements is connected, at least with its inlet or its outlet, to the inlet or the outlet of one of the other compressor elements .
Even more specifically, the invention is related to said high-pressure multistage centrifugal compressor, whereby in order to form a high-pressure stage at least one compressor element is placed in series connection with another compressor element by being connected with its inlet to the outlet of the other compressor element, and whereby each of said electric motors is driving the rotor shaft of one of said compressor elements in series connection, and whereby a first of said electric motors is also driving another one of the three compressor elements.
From for example BE 2000/0596, such a high-pressure multistage centrifugal compressor is already known, whereby in this case three centrifugal compressor elements are connected in series with one another for forming a three- stage compressor.
An advantage of these known high-pressure multistage centrifugal compressors is that high pressure ratios can be obtained, whereby the driving motors for driving the rotor shafts are able to rotate at relatively lower rotational speeds compared to a single-stage compressor with the same pressure ratio. Therefore motors can be used which are easier to construct, further implying an important reduction of the construction costs.
Moreover, thanks to the multistage arrangement the so- called Mach value losses (shock losses) are limited.
With the known high-pressure multistage centrifugal compressors of the aforementioned type it is generally aimed for to work with electric motors that are completely identical, in order to maintain the number of parts limited, which further contributes to an easy maintenance and to a reduction of the number of replacement parts .
However, a disadvantage of the known high-pressure multistage centrifugal compressors of said type is that it is not easy to obtain a uniform load distribution over both electric motors .
Yet another disadvantage of the known high-pressure multistage centrifugal compressors of said type is that the dimensions of the compressor element at the sucking side are disproportionately much larger compared to the compressor elements of the subsequent stages, since for a constant flow through the compressor much larger volumes have to be received at the sucking side, where the air is not yet compressed, than in the following stages.
The present invention therefore aims to offer a solution to one or more of the aforementioned and other problems. To that end, the present invention concerns a high-pressure multistage centrifugal compressor of the type described above, which is provided with a fourth compressor element that is driven by the other, second electric motor, and which fourth compressor element is connected with its inlet or outlet to the inlet or outlet of a compressor element which is driven by said first electric motor.
A first advantage of such a high-pressure multistage centrifugal compressor according to the invention, whereby four compressor elements are driven by two electric motors, is that a uniform load distribution over both electric motors can be realized more easily than with the known multistage compressors, since each of the electric motors drives the rotor shafts of two out of four compressor elements .
Yet another important aspect of such a high-pressure multistage centrifugal compressor according to the invention, consists in that the fourth compressor element, which is driven by the second electric motor, is connected to a compressor element which is driven by the first electric motor.
This creates a kind of feedback between the loads with which each of both electric motors is loaded, which contributes again to a more uniform load distribution over the electric motors.
According to a preferred embodiment of a high-pressure multistage centrifugal compressor according to the invention, at least two of the four said compressor elements are placed in parallel connection by having their respective outlets mutually connected.
Such an embodiment is particularly advantageous in cases where two low-pressure stages at the entry of the compressor are connected in parallel in said way, since in this way a larger flow of non-compressed air can be taken in with compressor elements having relatively smaller dimensions than in case the same flow has to be guaranteed with only one compressor element.
According to yet another preferred embodiment of a high- pressure multistage centrifugal compressor according to the invention, three of said compressor elements are placed in series connection forming three consecutive stages of the compressor, more specifically a first compressor element forming a low-pressure stage, a second compressor element forming an intermediate stage, and a third compressor element forming a high-pressure stage, respectively.
By placing three compressor elements in series, large pressure ratios be obtained in an easy way.
An extremely interesting embodiment consists of a combination of the characteristics of the two last- mentioned embodiments whereby a fourth compressor element is connected in parallel to the first compressor element for extending of said low-pressure stage.
Preferably, according to the invention, additionally, each of the rotor shafts of the two said compressor elements that are connected in parallel, is driven by another of said two electric motors.
A such, a favorable load distribution over both electric motors can be achieved again, while at the entry of the compressor large quantities of non-compressed air can be taken in using compressor elements having relatively small dimensions . In order to better explain the characteristics of the invention, the following preferred embodiments of a high- pressure multistage centrifugal compressor according to the invention are described as an example only without being limitative in any way, with reference to the accompanying figure, in which: figure 1 represents schematically the most preferred embodiment of a high-pressure multistage centrifugal compressor according to the invention.
The high-pressure multistage centrifugal compressor 1 according to the invention, represented in figure 1, is composed of four compressor elements, 2 to 5, and two electric motors, more specifically, a first electric motor 6 and a second electric motor 7.
The compressor elements 2 to 5 are of the centrifugal type and each consist of a rotor body 8 mounted on a rotor shaft 9 in a stator 10. In this case, each compressor element 2 to 5 is additionally provided with an inlet 11 extending axially and an outlet 12 directing radially, whereby each of the compressor elements 2 to 5 is connected, at least with its inlet 11 or its outlet 12, to the inlet 11 or the outlet 12 of one of the other compressor elements 2 to 5.
More specifically, in the example represented in figure 1 the three compressor elements 2 , 3 and 4 are placed in series connection forming three consecutive pressure stages of the compressor 1.
Hereby, the first compressor element 2 forms a low-pressure stage at the entry of the compressor 1, whereby non- compressed air is sucked in at the inlet 11 of the compressor element 2.
The second compressor element 3 is connected by means of a conduct 13 with its entry 11 to the outlet 12 of the first compressor element 2 for forming an intermediate pressure stage of the compressor 1. In the same way, the third compressor element 4 is connected by means of a conduct 13 with its inlet 11 to the outlet 12 of the second compressor element 3 for forming a high-pressure stage of the compressor 1.
Hereby, the outlet 12 of the third compressor element 4 forms the exit of the compressor 1 for discharging the compressed air from the compressor 1. According to the invention, an intercooler 14 is preferably provided between at least two compressor elements placed in series connection, forming consecutive pressure stages of the compressor 1. Preferably, as shown in the embodiment represented in figure 1, such an intercooler 14 is provided in the conducts 13 between each pair of serially connected compressor elements 2 to 4. Such an intercooler 14 can, for instance, consist of a radiator through which the compressed gas flows and which is cooled, for example, by ambient air supplied by a ventilator. Another possibility consists of, for example, cooling the compressed gas with a secondary cooling circuit through which cooling water flows.
Furthermore, in the embodiment shown in figure 1, the fourth compressor element 5 is connected in parallel to the first compressor element 2, whereby, more particularly the outlet 12 of the fourth compressor element 5 is connected by means of a conduct 13 to the outlet 12 of the first compressor element 2.
In fact, the low-pressure stage of the compressor 1 is doubled in this way, whereby the inlet 11 of the first compressor element 2 and the inlet 11 of the fourth compressor element 5 jointly constitute the sucking side of the compressor 1.
Consequently, the requirements being posed to each of the compressor elements 2 and 5 are less extensive than when only one compressor element would be used for sucking in the same amount of gas at the entry of the compressor 1.
Each of the electric motors is coupled with its motor shaft to a rotor shaft 9 of one of the serially connected compressor elements.
More in particular, the second electric motor 7 is driving the third compressor element 4, while the first electric motor 6 is driving the second compressor element 3 which is connected in series with the third compressor element 4.
Furthermore, the first electric motor 5 also drives the first compressor element 2.
Characterizing for the invention is that a fourth compressor element 5 is provided which is also driven by the second electric motor 7, whereby this fourth compressor element 5 in some way also affects the load of the first electric motor 6, since the outlet 12 of the fourth compressor element 5 is connected to the outlet 12 of the first compressor element 2 which is driven by the first electric motor 6.
This means that both electric motors 6 and 7 together guarantee the pressure build-up at the exit of the low- pressure stage.
According to the invention, at least one of the electric motors 6 and 7 is preferably a high-speed motor, and even more preferably, both electric motors 6 and 7 are highspeed motors .
High-speed motors are characterised by a characteristic value M = P.N2 that is larger than or equal to 0,1.1012, whereby P is the engine power, expressed in kW, and N is the rotational speed, expressed in revolutions per minute.
Yet another preferred aspect of the invention consists in making use of electric motors 6 and 7 which are identical, whereby, in other words, the electromagnetic stator part, the bearings and the cooling of the electric motors 6 and 7 are construed identically.
In order to avoid large friction losses and the like, according to the invention, the rotor shaft 9 of a compressor element 2 to 5 is preferably directly coupled to a drive shaft of one of the electric motors 6 and 7, without making use of any intermediate gear transmission. According to the invention all kinds of variants of other embodiments are also not excluded. For example, it is possible to connect at least two of the four compressor elements 2 to 5 in parallel by mutually- connecting their respective inlets 11.
In this way, for example, a compressor 1 according to the invention can be realized having several exits, for example with the intention of being able to serve different consumers or the like.
Of course, said ways to couple compressor elements 2 to 5 in parallel, by mutually coupling either their inlets 11 or their outlets 12, can also be combined. For example, it is not excluded to configure a high- pressure multistage centrifugal compressor such that two out of the four aforementioned compressor elements 2 to 5 are connected in parallel by having their corresponding inlets 11 interconnected, and that the two other of said four compressor elements 2 to 5 are connected in parallel by having their respecive outlets 12 interconnected.
All possible combinations in which specific compressor elements 2 to 5 are mutually connected in series (by connecting an outlet 12 to an inlet 11 respectively) and in which other of these compressor elements 2 to 5 are mutually connected in parallel are also not excluded.
The driving of the rotor shafts 9 of the compressor elements 2 to 5 can also be realized in different ways than is represented in figure 1. For example, it is not excluded that the rotor shaft 9 of two compressor elements 2 to 5, that are connected in parallel, each are driven by one and the same of the two electric motors 6 of 7.
Possibly, a high-pressure multistage centrifugal compressor may be obtained in which all four of said compressor elements 2 to 5 are placed in series connection forming four consecutive stages of the compressor 1.
In order to obtain a uniform load distribution over the electric motors, for example, an arrangement can be selected in which the first electric motor 6 is driving a first low-pressure compressor element and a third compressor element of the third pressure stage of the compressor, while the second electric motor is driving the second compressor element as well as the fourth compressor element of the last stage.
It is obvious that numerous other combinations are possible.
The invention is by no means limited to the embodiment of a high-pressure multistage centrifugal compressor 1, described by way of example and represented in the figure, however such a high-pressure multistage centrifugal compressor 1 according to the invention can be realized according to all kinds of variants while without departing from the scope of the invention.

Claims

Claims .
1.- A high-pressure multistage centrifugal compressor comprising at least three compressor elements (2-5), each consisting of at least one rotor body (8) mounted on a rotor shaft (9) in a stator housing (10) having an inlet
(11) and an outlet (12), as well as at least two electric motors (6,7) for driving the rotor shaft (9) of the compressor elements (2-5) , whereby each of the three compressor elements (2-5) is connected, at least with its inlet (11) or its outlet (12), to the inlet (11) or the outlet (12) of another compressor element (2-5), whereby in order to form a high-pressure stage, at least one compressor element (4) is placed in series connection with another compressor element (3) by being connected with its inlet (11) to the outlet (12) of the other compressor element (3), whereby each of said electric motors (6, 7) is driving the rotor shaft (9) of one of said compressor elements (3, 4) which are in series connection, whereby a first of said electric motors (6) is also driving another one of the three compressor elements (2), characterised in that the high-pressure multistage centrifugal compressor (1) is provided with a fourth compressor element (5) which is driven by the other, second electric motor (7) and which is connected with its inlet (11) or outlet (12) to the inlet (11) or outlet (12) of a compressor element (2-5) which is driven by said first electric motor (6) .
2.- High-pressure multistage centrifugal compressor according to claim 1, characterised in that at least two
(2, 5) of said four compressor elements (2-5) are connected in parallel by having their respective outlets (12) mutually connected.
3.- High-pressure multistage centrifugal compressor according to claim 1 of 2, characterised in that at least two of said four compressor elements (2-5) are connected in parallel by having their respective inlets (11) mutually connected.
4.- High-pressure multistage centrifugal compressor according to claims 2 and 3 , characterised in that two of said four compressor elements (2-5) are connected in parallel by having their respective inlets mutually connected, and the two other of said four compressor elements (2-5) are in parallel connection by having their corresponding outlets mutually connected.
5.- High-pressure multistage centrifugal compressor according to any one of claims 2 to 4, characterised in that each rotor shaft (9) of two of said compressor elements (2-5) , which are in parallel connection, is driven by another one of said two electric motors (6, 7) .
6.- High-pressure multistage centrifugal compressor according to any one of claims 2 to 5, characterised in that each rotor shaft (9) of two of said compressor elements (2-5) , which are in parallel connection, is driven by a same of said two electric motors (6,7).
7.- High-pressure multistage centrifugal compressor according to any one of the preceding claims, characterised in that three of said compressor elements (2-4) are placed in series connection forming three consecutive stages of the compressor (1), more specifically, a first compressor element (2) forming a low-pressure stage, a second compressor element (3) forming an intermediate stage, and a third compressor element (4) forming a high-pressure stage, respectively.
8.- High-pressure multistage centrifugal compressor according to claims 2, 5 and 7, characterised in that a fourth compressor element (5) is connected in parallel to the first compressor element (2) for extending said low- pressure stage.
9.- High-pressure multistage centrifugal compressor according to claim 7, characterised in that all four of said compressor elements (2-5) are placed in series forming four consecutive stages of the compressor (1) .
10.- High-pressure multistage centrifugal compressor according to any one of claims 7 to 9, characterised in that an intercooler (14) is provided between at least two compressor elements in series connection, forming consecutive stages of the compressor.
11.- High-pressure multistage centrifugal compressor according to any one of claims 7 to 9 , characterised in that an intercooler (14) is provided between each pair of compressor elements (2-5) in series connection, forming consecutive stages of the compressor (1) .
12.- High-pressure multistage centrifugal compressor according to any one of the preceding claims, characterised in that at least one of the electric motors (6, 7) is a high-speed motor.
13.- High-pressure multistage centrifugal compressor according to claim 12, characterised in that both electric motors (6, 7) are high-speed motors.
14.- High-pressure multistage centrifugal compressor according to any one of the preceding claims, characterised in that both electric motors (6, 7) are identical.
15.- High-pressure multistage centrifugal compressor according to any one of the preceding claims, characterised in that the rotor shaft (9) of at least one of the four compressor elements (2-5) is coupled directly to a drive shaft of one of the electric motors (6, 7), without intermediate gear transmission.
16.- High-pressure multistage centrifugal compressor according to claim 15, characterised in that the rotor shaft (9) of all compressor elements (2-5) is coupled directly to a drive shaft of one of the two electric motors (6, I)1 without intermediate gear transmission.
PCT/BE2010/000054 2009-08-11 2010-07-29 High-pressure multistage centrifugal compressor WO2011017783A2 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US27204109P 2009-08-11 2009-08-11
US61/272,041 2009-08-11
BE2010/0180A BE1019254A3 (en) 2009-08-11 2010-03-25 HIGH-PRESSURE MULTI-STAGE CENTRIFUGAL COMPRESSOR.
BE2010/0180 2010-03-25

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WO2011017783A2 true WO2011017783A2 (en) 2011-02-17
WO2011017783A3 WO2011017783A3 (en) 2011-04-28

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JP2013526678A (en) * 2010-05-21 2013-06-24 エクソンモービル アップストリーム リサーチ カンパニー Parallel dynamic compressor apparatus and related method
US9109603B2 (en) 2009-01-30 2015-08-18 Gardner Denver Deutschland Gmbh Multi-stage centrifugal compressors
WO2017065845A1 (en) 2015-10-15 2017-04-20 Praxair Technology, Inc. System and apparatus for compressing and cooling an incoming feed air stream in a cryogenic air separation plant
WO2017065844A1 (en) 2015-10-15 2017-04-20 Praxair Technology, Inc. Method for compressing an incoming feed air stream in a cryogenic air separation plant
WO2017065842A1 (en) 2015-10-15 2017-04-20 Praxair Technology, Inc. Method for compressing an incoming feed air stream in a cryogenic air separation plant
WO2017065843A1 (en) 2015-10-15 2017-04-20 Praxair Technology, Inc. Method for compressing an incoming feed air stream in a cryogenic air separation plant
WO2020065504A1 (en) * 2018-09-25 2020-04-02 Atlas Copco Airpower, Naamloze Vennootschap Oil-injected multi-stage compressor system and procedure for controlling such a compressor system
US11519412B2 (en) 2018-09-25 2022-12-06 Atlas Copco Airpower. Naamloze Vennootschap Oil-injected multistage compressor device and method for controlling a compressor device

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BE1013692A3 (en) * 2000-09-19 2002-06-04 Atlas Copco Airpower Nv HIGH PRESSURE, multi-stage centrifugal compressor.
EP1926914A2 (en) * 2005-09-19 2008-06-04 Ingersoll-Rand Company Multi-stage compression system including variable speed motors

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9109603B2 (en) 2009-01-30 2015-08-18 Gardner Denver Deutschland Gmbh Multi-stage centrifugal compressors
JP2013526678A (en) * 2010-05-21 2013-06-24 エクソンモービル アップストリーム リサーチ カンパニー Parallel dynamic compressor apparatus and related method
US10533565B2 (en) 2012-10-03 2020-01-14 Praxair Technology, Inc. Method for compressing an incoming feed air stream in a cryogenic air separation plant
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