US20150330404A1 - Large compressor bundle assembly - Google Patents

Large compressor bundle assembly Download PDF

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Publication number
US20150330404A1
US20150330404A1 US14/655,774 US201314655774A US2015330404A1 US 20150330404 A1 US20150330404 A1 US 20150330404A1 US 201314655774 A US201314655774 A US 201314655774A US 2015330404 A1 US2015330404 A1 US 2015330404A1
Authority
US
United States
Prior art keywords
bundle
rotary machine
diaphragm bundle
barrel casing
diaphragm
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.)
Abandoned
Application number
US14/655,774
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English (en)
Inventor
Franco Sarri
Alberto Guglielmo
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.)
Nuovo Pignone SRL
Original Assignee
Nuovo Pignone SRL
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 Nuovo Pignone SRL filed Critical Nuovo Pignone SRL
Assigned to NUOVO PIGNONE SRL reassignment NUOVO PIGNONE SRL ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: GUGLIELMO, ALBERTO, SARRI, FRANCO
Publication of US20150330404A1 publication Critical patent/US20150330404A1/en
Abandoned 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
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/284—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for compressors
    • 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
    • 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
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps 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
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • F04D29/441—Fluid-guiding means, e.g. diffusers 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
    • F04D29/00—Details, component parts, or accessories
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
    • F04D29/624—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • 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
    • F05D2230/00—Manufacture
    • F05D2230/60—Assembly methods
    • F05D2230/64—Assembly methods using positioning or alignment devices for aligning or centring, e.g. pins
    • 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
    • F05D2300/50—Intrinsic material properties or characteristics
    • F05D2300/509—Self lubricating materials; Solid lubricants
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49229—Prime mover or fluid pump making
    • Y10T29/49236—Fluid pump or compressor making
    • Y10T29/49245—Vane type or other rotary, e.g., fan

Definitions

  • Embodiments of the subject matter disclosed herein generally relate to rotary machines, in particular centrifugal compressors, as well as systems and methods for assembling them, in particular for the insertion/extraction of a large diaphragm bundle into/from a barrel casing.
  • a centrifugal compressor is composed by an external casing having an internal cylindrical cavity that accommodates a cylindrical diaphragm bundle.
  • the diaphragm bundle includes rotor and stator with their impellers, seals, fluid channel and balance pistons.
  • a compressor having a so called barrel casing i.e. a casing that is radially split
  • the diaphragm bundle is inserted axially in the cylindrical cavity of the barrel casing through one of its open ends.
  • the insertion or extraction of the bundle from the casing is a difficult and complicated task when dealing with large size compressors.
  • the diaphragm bundle and the barrel casing should never come in contact during this operation because of the very high risk of damaging their surfaces due to wear/galling phenomena.
  • a technique to solve this problem at least partially, consists in providing the casing or the diaphragm bundle, or both, with rollers on which the diaphragm bundle can slide inside the casing cavity.
  • the position of the rollers mounted on the diaphragm bundle that is normally adjusted through shims or other similar means before the bundle is installed inside the casing, cannot be adjusted anymore once the bundle is in.
  • the rollers When the rollers are mounted on the casing their height can be adjusted by means of screws or similar devices, they can also be provided with means to correct the tilting.
  • a first aspect of the present invention is a rotary machine, in particular a centrifugal compressor.
  • a rotary machine comprises a barrel casing having a cylindrical internal surface, and a diaphragm bundle having a cylindrical external surface wherein the diaphragm bundle during assembly of the compressor is insertable in axial direction into the casing with its external surface in mating relation with the internal surface of the barrel casing, and wherein the diaphragm bundle comprises sliding means attached to its external surface bearing the whole diaphragm bundle weight while preventing any direct contact between the casing internal surface and the diaphragm bundle external surface both during assembly of the compressor and with the bundle in operating position.
  • sliding motion is lateral motion of two solid surfaces in contact. Therefore, the above mentioned “sliding means” are designed to bear the whole diaphragm bundle weight but also to allow a sliding motion of the diaphragm bundle on the casing.
  • the sliding means may be sliding pads.
  • the sliding pads are made of self-lubricant material like cast iron, bronze, or other lubricant filled materials.
  • the sliding pads, as well as the steps inside the casing may have blended surface portions to minimize Hertzian contact pressure while the bundle is approaching the internal diametric steps possibly existing inside the casing housing.
  • a second aspect of the present invention is a system for assembling a rotary machine.
  • a system for assembling a rotary machine comprises a barrel casing having a cylindrical internal surface, and a diaphragm bundle having a cylindrical external surface, wherein the diaphragm bundle during assembly of the compressor is insertable in axial direction into the barrel casing with its external surface in mating relation with the internal surface of the barrel casing, and wherein the diaphragm bundle comprises sliding means attached to its external surface bearing the whole diaphragm bundle weight while preventing any direct contact between the barrel casing internal surface and diaphragm bundle external surface both during assembly of the centrifugal compressor and when the diaphragm bundle is in its final operating position.
  • a third aspect of the present invention is a method for assembling a rotary machine.
  • a method for assembling a rotary machine comprises a barrel casing having a cylindrical internal surface, and a diaphragm bundle having a cylindrical external surface, wherein the diaphragm bundle during assembly of the compressor is inserted in axial direction into the barrel casing with its external surface in mating relation with the internal surface of the barrel casing, and wherein the diaphragm bundle comprises sliding means attached to its external surface; the diaphragm bundle during assembly of the rotary machine is inserted in axial direction into the barrel casing said sliding means bearing the whole diaphragm bundle weight while preventing any direct contact between the barrel casing internal surface and diaphragm bundle external surface during assembly of the rotary machine and when the diaphragm bundle reaches its final operating position.
  • FIG. 1 represents a cross sectional longitudinal view of a compressor showing the barrel casing and the diaphragm bundle after assembling;
  • FIG. 2 represents a perspective view of the compressor mounted on the assembling structure
  • FIG. 3A represents a particular of the bundle position during installation phase
  • FIG. 3B represents a particular of the bundle/casing at the final installation position
  • FIG. 4 represents a perspective view of a sliding pad mounted on the external surface of the bundle
  • FIG. 5 represents particular of the casing internal surface, of the bundle external surface and of the sliding pad at the final centering position
  • FIG. 6 represents a particular of the diaphragm bundle with a series of sliding pads inserted along its the external surface.
  • Embodiments of the invention mainly applicable to large/very heavy centrifugal compressors equipped with barrel casing, provide the installation of sliding pads at several convenient locations, typically in the areas adjacent the external gasket, on the outer diaphragm bundle periphery.
  • the sliding pads will be bearing the whole diaphragm bundle weight preventing it from touching the casing cavity after the bundle reaches its final location inside the casing.
  • the sliding pads will also prevent during the assembly phase, when the bundle is supported on rollers, that any direct contact can occur between casing and diaphragm bundle due to misalignments or other possible installation errors.
  • Another advantage of the present invention is the easy replacement of possible damaged pads instead of having to manage costly and time consuming repairs on heavy compressors parts, considering also the costs due to machine unavailability.
  • FIG. 1 illustrates a particular of a large rotary machine, in particular a large barrel centrifugal compressor generally designated 100 with the barrel casing 1 and the diaphragm bundle 2 .
  • FIG. 2 illustrates the same compressor mounted on his baseplate together with the assembling structure.
  • the barrel casing 1 includes a general cylindrical cavity into which the diaphragm bundle 2 can accommodate, the internal surface 6 of the casing 1 forming the cylindrical cavity mating with the external surface 7 of the generally cylindrical diaphragm bundle 2 . Both internal surface 6 of the barrel casing 1 and external surface 7 of the diaphragm bundle 2 are stepped and present portions having different diameters.
  • the barrel casing 1 may be provided at its end with a flange 5 while it is open for the insertion of the diaphragm bundle 2 at the other end.
  • the diaphragm bundle 2 has a known basic configuration and includes the stator, the flow path 11 with the suction channels 14 - 15 and the discharge channels 21 - 22 , and a rotor 16 with the rotating shaft 17 and a plurality of impellers 18 .
  • the rotor 16 is driven at high rotational speed by a motor and the fluid, supplied through the suction nozzle/s 14 - 15 is compressed stepwise by the rotor and stator blades and discharged through the discharge nozzle/s 21 - 22 .
  • the barrel casing 1 must contain the very high pressure created inside. The air sealing between the possible different compression sections that are made up in the barrel casing cavity is normally obtained through a series of gaskets 8 ( FIG.
  • the diaphragm bundle 2 is inserted into the casing 1 by sliding it into there through the opening provided at the end of the casing cavity.
  • a proper apparatus generally designated 200 as shown in FIG. 2 is provided for facilitating the insertion and/or extraction of the diaphragm bundle 2 from the barrel casing 1 .
  • the apparatus 200 includes a member 201 for supporting the barrel casing 1 and the bundle 2 (when inside the casing 1 ) during the insertion/extraction. Outside the casing 1 , the diaphragm bundle 2 is supported, through the fixture 202 , by external rollers 203 . Given the close tolerance between the external surface 7 of the diaphragm bundle 2 and the mating inner surface 6 of the barrel casing 1 , it is very difficult to avoid contact between these two surfaces during insertion/extraction of the diaphragm bundle 2 from the into/from the barrel casing 1 .
  • the diaphragm bundle 2 is directly centered inside the casing 1 at gaskets 8 location.
  • FIG. 3A shows the diaphragm bundle 2 position during the installation phase.
  • the bundle at this stage is supported by internal rollers 19 .
  • FIG. 3B shows the diaphragm bundle final installation position when the internal rollers 19 mounted on the diaphragm bundle 2 do not support it anymore once it reaches its final centering location inside the casing 1 .
  • Risk of galling is then very high because of the huge contact forces developed between barrel casing 1 and diaphragm bundle 2 surfaces at the moment the bundle 2 reaches its centering location and loses both external and internal rollers support.
  • sliding pads 9 are provided at several convenient locations, typically in the areas adjacent the external gaskets 8 , around the external surface 7 of the diaphragm bundle 2 .
  • sliding pads 9 are shown positioned at the two longitudinal extremities of the diaphragm bundle 2 near the position that is generally occupied by the gaskets 8 .
  • other sliding pads 9 are mounted at the interphase gasket position.
  • the bundle is initially aligned with the casing by means of the external fixture rollers 203 in such a way that its axis is parallel to the casing 1 and it is pushed inside the casing 1 cavity while being supported on both the internal 19 and external 203 sets of rollers. All along this phase the sliding pads 9 ensure that no contact can occur between casing and bundle due to possible tilting of the latter.
  • these pads 9 provide that a small clearance of around 100 microns is however maintained between the diaphragm bundle external surface 7 and the barrel casing 1 centering stretches at gasket location so preventing that the casing and diaphragm bundle come in contact at any time.
  • the two mating surface are in direct contact.
  • FIG. 4 shows such a sliding pad according to an embodiment.
  • the pads 9 can present a relatively large contact surface to minimize contact pressure while the diaphragm bundle 2 reaches its final destination. For the same reason the shape of the pads is adapted to the curvature of the casing surface.
  • the pads have substantially the shape of a section of a cylinder that copies the mating barrel casing 1 inner surface 6 , and a longitudinal dimension parallel to the bundle circumference greater than the transverse dimension.
  • FIG. 6 shows the installation of the pads along a circumference of the bundle external surface 7 .
  • the pads 9 are positioned on the bundle surface interspersed around its circumference.
  • the number of pads along a circumference can be of the order of 10.
  • the pads, see FIG. 4 , 5 , 6 are inserted and kept in position by screws 10 in a recess 20 formed on the surface 7 of the diaphragm bundle 2 in such a way that they can protrude from the surface 7 of the diaphragm bundle 2 for few mm more specifically from 2 to 10 mm.
  • the surface 12 see FIGS.
  • shim pack 9 a (see FIGS. 4 and 5 ) has been built in the sliding pad design.
  • the sliding pads are made of self-lubricating material such as cast iron or other graphite or other lubricant filled materials, like graphite filled nickel.
  • the locations of the pads on the outer bundle surface 7 in the direction of the longitudinal axis of the bundle and all around a circumference of the bundle 7 are chosen in such a way to prevent contact between bundle and casing at any time.
  • Embodiments of the invention prevent barrel casing 1 and diaphragm bundle 2 be in contact either during the installation phase or after the bundle assembly completion.
  • the galling phenomena that is quite frequent on diaphragm bundles weighing more than 10 tons and that often involves very expensive and time consuming repairs activities, is eliminated as the very opportunity to get to a hard contact between casing and diaphragm bundle at the moment they center each other is totally avoided according to embodiments of the invention.
  • Another important consideration is that even though damages could occur in some scenarios, it would likely involve just the pads, that could be easily replaced.
  • Embodiments of the invention ensure that no damages on casing and bundle diametric sealing faces, involving significant compressor performance losses, could be generated during the diaphragm bundle installation or removal from the casing.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Compressor (AREA)
US14/655,774 2012-12-27 2013-12-18 Large compressor bundle assembly Abandoned US20150330404A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
ITCO2012A000069 2012-12-27
IT000069A ITCO20120069A1 (it) 2012-12-27 2012-12-27 Assieme statorico di compressore di grandi dimensioni
PCT/EP2013/077260 WO2014102126A1 (en) 2012-12-27 2013-12-18 Large compressor bundle assembly

Publications (1)

Publication Number Publication Date
US20150330404A1 true US20150330404A1 (en) 2015-11-19

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Application Number Title Priority Date Filing Date
US14/655,774 Abandoned US20150330404A1 (en) 2012-12-27 2013-12-18 Large compressor bundle assembly

Country Status (11)

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US (1) US20150330404A1 (zh)
EP (1) EP2938883A1 (zh)
JP (1) JP2016503856A (zh)
KR (1) KR20150103089A (zh)
CN (1) CN105026767A (zh)
AU (1) AU2013369435A1 (zh)
BR (1) BR112015015591A2 (zh)
CA (1) CA2895572A1 (zh)
IT (1) ITCO20120069A1 (zh)
MX (1) MX2015008478A (zh)
WO (1) WO2014102126A1 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20230304508A1 (en) * 2022-03-24 2023-09-28 Emerson Climate Technologies, Inc. Variable inlet guide vane apparatus and compressor including same

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201700007473A1 (it) * 2017-01-24 2018-07-24 Nuovo Pignone Tecnologie Srl Treno di compressione con un compressore centrifugo e impianto lng
JP2022118972A (ja) * 2021-02-03 2022-08-16 三菱重工コンプレッサ株式会社 圧縮機、圧縮機組立体、及び圧縮機の組立方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7267319B2 (en) * 2004-11-09 2007-09-11 General Electric Company Low-friction slide-plates for rotary machines
US20100090087A1 (en) * 2006-09-25 2010-04-15 Dresser-Rand Company Compressor mounting system
US20110318163A1 (en) * 2010-06-23 2011-12-29 Hitachi Plant Technologies, Ltd. Barrel-shaped centrifugal compressor

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Publication number Priority date Publication date Assignee Title
CH532202A (de) * 1970-12-15 1972-12-31 Bbc Sulzer Turbomaschinen Einbaublock zum Einbau in einen mehrstufigen Radialverdichter
US5971702A (en) * 1998-06-03 1999-10-26 Dresser-Rand Company Adjustable compressor bundle insertion and removal system
ITMI20032149A1 (it) * 2003-11-07 2005-05-08 Nuovo Pignone Spa Compressore centrifugo multistadio con cassa apribile orizzontalmente
DE102005052077B4 (de) * 2005-10-28 2016-11-24 Man Diesel & Turbo Se Vorrichtung zur seitlichen Montage und Demontage eines Kompressorbarrels
JP5554130B2 (ja) * 2010-04-14 2014-07-23 三菱重工コンプレッサ株式会社 コンプレッサおよびその組立方法
JP5479387B2 (ja) * 2011-02-25 2014-04-23 三菱重工コンプレッサ株式会社 圧縮機およびこの組込方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7267319B2 (en) * 2004-11-09 2007-09-11 General Electric Company Low-friction slide-plates for rotary machines
US20100090087A1 (en) * 2006-09-25 2010-04-15 Dresser-Rand Company Compressor mounting system
US20110318163A1 (en) * 2010-06-23 2011-12-29 Hitachi Plant Technologies, Ltd. Barrel-shaped centrifugal compressor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20230304508A1 (en) * 2022-03-24 2023-09-28 Emerson Climate Technologies, Inc. Variable inlet guide vane apparatus and compressor including same

Also Published As

Publication number Publication date
BR112015015591A2 (pt) 2017-07-11
MX2015008478A (es) 2015-09-23
ITCO20120069A1 (it) 2014-06-28
AU2013369435A1 (en) 2015-07-09
JP2016503856A (ja) 2016-02-08
EP2938883A1 (en) 2015-11-04
KR20150103089A (ko) 2015-09-09
WO2014102126A1 (en) 2014-07-03
CN105026767A (zh) 2015-11-04
CA2895572A1 (en) 2014-07-03

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Owner name: NUOVO PIGNONE SRL, ITALY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:SARRI, FRANCO;GUGLIELMO, ALBERTO;SIGNING DATES FROM 20130604 TO 20130606;REEL/FRAME:035911/0950

STCB Information on status: application discontinuation

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