EP1473462B1 - Patrone zum Zusammenbau eines Verdichters - Google Patents

Patrone zum Zusammenbau eines Verdichters Download PDF

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Publication number
EP1473462B1
EP1473462B1 EP04290916A EP04290916A EP1473462B1 EP 1473462 B1 EP1473462 B1 EP 1473462B1 EP 04290916 A EP04290916 A EP 04290916A EP 04290916 A EP04290916 A EP 04290916A EP 1473462 B1 EP1473462 B1 EP 1473462B1
Authority
EP
European Patent Office
Prior art keywords
compressor
outlet
casing
cell
compressor unit
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.)
Expired - Lifetime
Application number
EP04290916A
Other languages
English (en)
French (fr)
Other versions
EP1473462A1 (de
Inventor
Patrick Friez
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Thermodyn SAS
Original Assignee
Thermodyn SAS
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
Application filed by Thermodyn SAS filed Critical Thermodyn SAS
Publication of EP1473462A1 publication Critical patent/EP1473462A1/de
Application granted granted Critical
Publication of EP1473462B1 publication Critical patent/EP1473462B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F04D29/00—Details, component parts, or accessories
    • F04D29/08—Sealings
    • F04D29/10—Shaft sealings
    • F04D29/102—Shaft sealings especially adapted for elastic fluid 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
    • 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
    • F04D17/125—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 the casing being vertically split
    • 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
    • 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
    • F04D29/08—Sealings
    • F04D29/083—Sealings especially adapted for elastic fluid pumps

Definitions

  • the invention relates to a centrifugal compressor group or motor-compressor unit. More particularly, the invention relates to a centrifugal compressor group with vertical joint plane, that is to say a compressor unit whose compressor is closed by two end caps and composed of one or more compression sections placed online.
  • a particularly advantageous application of such a compressor unit concerns the production of an integrated compressor unit, that is to say a compressor unit which comprises an electric motor driving a rotor and a compressor comprising a set of at least one wheel with compression vanes disposed on a driven shaft driven by the rotor, the assembly being mounted in a gas-tight common housing handled by the compressor unit.
  • any compressor which may consist of a cartridge comprising a rotor supported by bearings and an aerodynamic stator provided with shaft end sealing means mounted in an envelope, these different components that may or may not bathe in the gas handled by the compressor.
  • Such compressors can be driven by all types of motor means, for example electric motor means fixed or variable speed, high speed or not, or by a steam turbine, a gas turbine, ... a speed multiplier or a mechanical speed variator that can be placed if necessary between the trainer and the compressor.
  • motor means for example electric motor means fixed or variable speed, high speed or not, or by a steam turbine, a gas turbine, ... a speed multiplier or a mechanical speed variator that can be placed if necessary between the trainer and the compressor.
  • a compressor of a conventional vertical gasket compressor unit conventionally comprises a generally cylindrical shell 10 provided with a bottom 12 inside which the different parts of the compressor are mounted, namely the rotor 14, the stator 16 of the part aerodynamic compressor, the shaft end sealing means 18 and 20, radial bearings, such as 21, and a pivot 22 providing axial guidance of the rotor 14 and constituting an abutment limiting the axial displacement of the rotor during compressor operation.
  • the assembly is closed by a cover 24 fixed on the casing 10, for example by screwing or by means of a shearing ring 26.
  • stator elements 16 comprise an input cell 28 delimiting an intake duct 30 intended to supply the compressor with gas, and one or more diaphragms 29 intended to collect the gas at the outlet. of each paddle wheel, such as 30, to slow it down in a radial diffuser 31 and then guide it to the next wheel by a return channel 32. Finally, an outlet cell 34, which includes a discharge volute, provides the gas collection at the outlet of the last impeller of the compressor and the guide to a discharge pipe.
  • shaft end sealing devices 18 and 20 are respectively mounted in the bottom 12 of the casing 10 and in the cover 24.
  • DE-A-196 54 840 describes a compressor unit comprising a rotor driven in rotation by motor means in a stator and several stages of compression each comprising a paddle wheel driven by the rotor.
  • the assembly is mounted in a cartridge in an envelope.
  • the architecture of the compressor unit described in this document also does not allow to effectively compensate the axial forces generated by the rotation of the paddle wheels.
  • the object of the invention is to overcome the drawbacks of the state of the art and to provide a compressor unit, particularly of the type with a joint plane. to avoid the occurrence of forces on the mounting elements of the various components of the compressor and further facilitating the assembly and maintenance of such a compressor.
  • a compressor unit comprising an electric motor driving a rotor, at least one compressor comprising a stator comprising, mounted in a cartridge in an envelope, at least one input cell delimiting an admission duct supply of the gas compressor unit, an outlet cell delimiting a discharge volute and at least one compression cell disposed between the intake duct and the outlet volute and each equipped with a compressor blade wheel mounted on a driven shaft driven by the rotor, a radial centering pivot forming a stop for the rotor and shaft end sealing means.
  • This compressor unit further comprises shaft end sealing means interposed between the rotor and the output cell.
  • the positioning of the shaft end sealing means between the output cell and the rotor makes it possible to establish fluid communication between the end face of the output cell and the discharge pipe, thus generating forces on this face opposing the forces generated under the effect of the pressure of the gas in each compression cell.
  • the output cell and a corresponding end of the casing comprise two facing radial surfaces through which the cartridge bears against the casing with clearance, said bores being made to be in fluid communication with the casing. output of the output cell.
  • said radial surfaces opposite the exit cell and the envelope are each delimited by two end bores made in the output cell, on the one hand, and in said corresponding end of the envelope, 'somewhere else.
  • the latter comprises sealing elements adapted to achieve a seal between the cartridge and the envelope in an area encompassing the output of the output cell and said radial surfaces.
  • the sealing elements may be arranged to provide a seal between the intake duct and the compressor outlet and to establish fluid communication between a cavity defined by the facing surfaces and the outlet of the compressor.
  • the shaft end sealing means are fixed on the cartridge.
  • the assembly constituted by the motor and the or each compressor is mounted in a common envelope to constitute an integrated motor compressor.
  • the envelope comprises a first section in which the motor is arranged and a second section in which the compressor is mounted, the first and second sections being separated by a narrowed section bore delimiting said surface. radial of the envelope.
  • the output cell comprises, for example, an axial cylindrical extension which fits into said bore, with the interposition of a sealing element.
  • FIG. 2 shows a sectional view of a compressor of a compressor unit according to the invention, designated by the general reference numeral 36.
  • this compressor 36 is constituted by a compressor multi-stage centrifuge with a vertical joint plane, that is to say closed by an end cap, and is composed of several compression sections arranged in line between an inlet E for supplying the compressor with gas to be compressed and an output S of compressed gas. It is intended to be associated with an electric motor (not shown) driving in rotation a drive shaft driving itself a rotor 38.
  • This electric motor can be a fixed or variable speed motor, high speed or not.
  • the rotor 38 can also be rotated by a steam turbine or a gas turbine.
  • a multiplier or a mechanical speed variator may be interposed, as the case may be between the compressor 36 and the motor means.
  • the compressor 36 essentially comprises a casing 40 of generally cylindrical shape inside which are placed a set of compression cells 42, 44, 46 and 48 which each constitute a compression stage. These compression cells 42, 44, 46 and 48 are arranged in line between an input cell 50 in which is formed an intake duct 52 for supplying the compression stages and an output cell 54 delimiting a volute of repression 56.
  • the intake duct 52 is arranged coaxially with an orifice 58 formed in the casing 40 to form the gas inlet E.
  • the outlet volute 56 opens, meanwhile, into an orifice 60 formed in the casing 40 to form the outlet S of compressed gas.
  • Each compression cell 42, 44, 46, and 48 comprises a blade wheel, such as 62, rotated by the rotor 38 and providing, as is conventional, on the one hand, an increase in the static pressure of the gas handled by the compressor and, on the other hand, an increase in kinetic energy.
  • a radial diffuser 64 fitted to each compression cell, performs a pressure transformation of the kinetic energy increase downstream of the impeller 62.
  • a fuel return channel 66 guides the gas to a next stage or to the output volute 56.
  • FIG. 2 also shows that the envelope 40 is provided with a first open end 68 closed by an end cap 70 fastened by means of shear rings 72 or bolted and an opposite end 74 which has a section bore narrowed relative to the remainder of the casing, into which an axial cylindrical extension 76 of the outlet cell 54 is inserted.
  • a pivoting 80 having an axial stop 82 and radial bearings 84, maintains the radial and axial positioning of the rotor 38.
  • shaft end sealing devices 86 and 88 are arranged, one between the rotor 38 and the input cell 50 and the other between the rotor 38 and the output cell 54, particular between the rotor 38 and the axial cylindrical extension 76.
  • the various elements involved in constituting the stator namely the different compression stages as well as the input and output cells 54, are arranged in the envelope with insertion set , so as to allow axial sliding of these elements with respect to the envelope 40.
  • the external peripheral surface of the outlet cell 54 delimits, with the external peripheral surface of the axial cylindrical extension 76, an annular surface S1, which bears, during assembly, against a surface corresponding annulus S2, delimited by a first bore 90 or main bore of the casing 40 and a second bore 92 delimiting the passage in which is inserted the axial cylindrical extension 76 of the output cell 54.
  • the space delimited by the two facing surfaces S1 and S2 is in fluid communication with the output volute 56 and is therefore at the pressure of the gas in turbocharger outlet.
  • first and second annular seal seals 92 and 94 are disposed on either side of the intake duct 52.
  • a third annular seal 96 is interposed between the axial cylindrical extension 76 and the casing. 40.
  • the axial forces passing through the cartridge at the abutment 82 are much greater than the axial thrust of the rotor under the effect of the compression wheels 62, which contributes to ensuring the axial retention of the stator of the abutment.
  • the output cell 54 is directly supported and held against the last compression stage due to the pressure in the cavity between the surfaces S1 and S2. This allows to precisely control the section of the radial diffuser 66 of the last stage which is located between these two elements.
  • the pressure in this diffuser results in a separation of the last compression stage and the output cell 54, and therefore the appearance of instability aerodynamic in the gas flow at the outlet of the diffuser generating rotating forces on the rotor and significant vibrations in the latter, no variation in section appears within the diffuser of the last stage.
  • shaft end sealing devices 86 and 88 as well as the radial bearings 78 and 84 are not subjected to any axial force and can therefore be fixed to the stator elements that are mounted in the envelope 40. to form a cartridge formed of a one-piece and rigid assembly, without the need for overdimensions. Such a cartridge can thus form a unitary assembly that can be easily inserted into the envelope without requiring a separate assembly of each element.
  • FIG. 1 Another embodiment of a compressor compressor according to the invention will now be described with reference to FIG.
  • elements identical to those described with reference to Figure 2 bear the same reference numerals.
  • This embodiment is suitable for producing an integrated motor compressor, that is to say a compressor unit in which the motor and the compressor are arranged in the same common envelope.
  • This figure shows the envelope 40, in which the input 50 and output 54 cells are arranged, as well as the compression cells 42, 44, 46 and 48 between a gas inlet E and an outlet S.
  • the envelope 40 has a first section 98 in which is disposed the compressor 36, and a second section 100, in which is arranged the electric motor of the compressor unit (not shown), these two sections 98 and 100 being separated by an intermediate portion 102 of narrowed section defining an axial cylindrical passage and comprising, on the side facing the first section 98, an annular surface S2 intended to cooperate with the annular surface S1 of the output cell 54.
  • this section 98 is also closed by an end cap 70 supporting the pivoting element 80.
  • the radial bearings 78 are supported by the axial cylindrical extension 76 of the outlet cell 54.
  • the invention which has just been described makes it possible to keep all the compressor parts in contact with each other because of the forces generated by the pressure of the gas filling the cavity between the surfaces S1 and S2 of the outlet cavity, on the one hand, and the envelope, on the other hand.
  • the mounting of the volute on the last diffuser can control the section of this diffuser, thus avoiding any risk of aerodynamic instability at low flow.
  • the invention makes it possible to greatly facilitate the assembly of the compressor and to reduce the intervention time of the maintenance personnel.

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

Claims (8)

  1. Verdichtereinheit mit einem einen Rotor (38) antreibenden elektrischen Motor, mit mindestens einem Verdichter (36), der einen Stator aufweist, der, als Kartusche in einer Hülle montiert, mindestens eine Eingangszelle (50), die einen Einlass (52) für die Gaszufuhr in die Verdichtereinheit begrenzt, eine Ausgangszelle (54), die eine Verdrängungsspirale begrenzt, und mindestens eine Verdichtungszelle (42, 44, 46, 48), die zwischen dem Einlass und der Ausgangsspirale angeordnet und je mit einem Verdichtungsschaufelrad (62) versehen ist, das auf eine vom Rotor angetriebene Abtriebswelle montiert ist, eine einen Anschlag für den Rotor bildende Traglagereinheit (80) zur radialen Zentrierung, und Wellenende-Dichtungsmittel (86, 88), die zwischen dem Rotor (38) und der Ausgangszelle (54) angeordnet sind, aufweist, dadurch gekennzeichnet, dass die Ausgangszelle und ein entsprechendes Ende der Hülle zwei radiale einander gegenüberliegende Flächen (S1, S2) aufweisen, über die die Kartusche mit Spiel gegen die Hülle anliegt, wobei die Bohrungen so angeordnet sind, dass sie mit dem Ausgang (S) der Ausgangszelle in fluidischer Verbindung stehen.
  2. Verdichtereinheit nach Anspruch 1, dadurch gekennzeichnet, dass die radialen einander gegenüberliegenden Flächen (S1, S2) der Ausgangszelle und der Hülle jeweils durch zwei Endbohrungen begrenzt sind, die einerseits in der Ausgangszelle und andererseits im entsprechenden Ende der Hülle angeordnet sind.
  3. Verdichtereinheit nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass sie Dichtungselemente (94, 96) aufweist, die ausgelegt sind, um eine Dichtheit zwischen der Kartusche und der Hülle in einem Bereich zu gewährleisten, der den Ausgang der Ausgangszelle und die radialen Flächen umfasst.
  4. Verdichtereinheit nach Anspruch 3, dadurch gekennzeichnet, dass die Dichtungselemente so angeordnet sind, dass sie eine Dichtheit zwischen dem Einlass und dem Ausgang des Verdichters herstellen und eine fluidische Verbindung zwischen einem von den gegenüberliegenden Flächen (S1, S2) begrenzten Hohlraum und dem Ausgang des Verdichters herstellen.
  5. Verdichtereinheit nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Wellenende-Dichtungsmittel auf der Kartusche befestigt sind.
  6. Verdichtereinheit nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die vom Motor und von dem oder jedem Verdichter gebildete Einheit in einer gemeinsamen Hülle (40) befestigt ist.
  7. Verdichtereinheit nach Anspruch 6, abhängig vom Anspruch 1, dadurch gekennzeichnet, dass die Hülle ein erstes Segment (98), in dem der Motor angeordnet ist, und ein zweites Segment (100) aufweist, in dem der Verdichter angeordnet ist, wobei das erste und das zweite Segment durch eine Bohrung (102) mit verengtem Querschnitt getrennt sind, die die radiale Fläche der Hülle begrenzt.
  8. Verdichtereinheit nach Anspruch 7, dadurch gekennzeichnet, dass die Ausgangszelle eine zylindrische axiale Verlängerung (76) aufweist, die sich mit einem zwischengelegten Dichtungselement in die Bohrung einfügt.
EP04290916A 2003-04-28 2004-04-06 Patrone zum Zusammenbau eines Verdichters Expired - Lifetime EP1473462B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0305186 2003-04-28
FR0305186A FR2854207B1 (fr) 2003-04-28 2003-04-28 Groupe compresseur a montage en cartouche.

Publications (2)

Publication Number Publication Date
EP1473462A1 EP1473462A1 (de) 2004-11-03
EP1473462B1 true EP1473462B1 (de) 2006-01-25

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP04290916A Expired - Lifetime EP1473462B1 (de) 2003-04-28 2004-04-06 Patrone zum Zusammenbau eines Verdichters

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Country Link
EP (1) EP1473462B1 (de)
DE (1) DE602004000354T2 (de)
FR (1) FR2854207B1 (de)
NO (1) NO20041686L (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2980538B1 (fr) * 2011-09-27 2013-10-25 Thermodyn Groupe moto-compresseur a cartouche amovible
EP3620658A1 (de) * 2018-09-04 2020-03-11 Siemens Aktiengesellschaft Deckel eines turbomaschinengehäuses, turbomaschinengehäuse mit einem deckel, turbomaschine und verfahren zur herstellung eines deckels

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB282113A (en) * 1926-12-13 1928-03-15 Rateau Soc A method of mounting centrifugal compressors or other rotary apparatus
DE1046248B (de) * 1952-03-21 1958-12-11 Alfred Buechi Dr Ing Mehrstufige Zentrifugalfoerdermaschine
DE19654840C2 (de) * 1996-12-23 2001-12-13 Mannesmann Ag Mehrstufiger Turbokompressor
EP0990798A1 (de) * 1999-07-16 2000-04-05 Sulzer Turbo AG Turboverdichter

Also Published As

Publication number Publication date
FR2854207B1 (fr) 2006-06-23
NO20041686L (no) 2004-10-29
DE602004000354T2 (de) 2006-11-02
FR2854207A1 (fr) 2004-10-29
EP1473462A1 (de) 2004-11-03
DE602004000354D1 (de) 2006-04-13

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