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EP3165772A1 - Partie interne pour une turbomachine, turbomachine et procédé de montage - Google Patents

Partie interne pour une turbomachine, turbomachine et procédé de montage Download PDF

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Publication number
EP3165772A1
EP3165772A1 EP15193213.4A EP15193213A EP3165772A1 EP 3165772 A1 EP3165772 A1 EP 3165772A1 EP 15193213 A EP15193213 A EP 15193213A EP 3165772 A1 EP3165772 A1 EP 3165772A1
Authority
EP
European Patent Office
Prior art keywords
rotor
stator
inner part
turbomachine
sta
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Withdrawn
Application number
EP15193213.4A
Other languages
German (de)
English (en)
Inventor
Dieter Nass
Steffen Petri
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.)
Siemens AG
Original Assignee
Siemens AG
Siemens Corp
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 Siemens AG, Siemens Corp filed Critical Siemens AG
Priority to EP15193213.4A priority Critical patent/EP3165772A1/fr
Priority to PCT/EP2016/074284 priority patent/WO2017076584A1/fr
Publication of EP3165772A1 publication Critical patent/EP3165772A1/fr
Withdrawn legal-status Critical Current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
    • F04D29/60—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
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
    • F01D25/28—Supporting or mounting arrangements, e.g. for turbine casing
    • F01D25/285—Temporary support structures, e.g. for testing, assembling, installing, repairing; Assembly methods using such structures
    • 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
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
    • F04D29/622—Adjusting the clearances between rotary and stationary parts
    • 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
    • F05D2260/00—Function
    • F05D2260/02—Transport and handling during maintenance and repair

Definitions

  • the invention relates to an inner part of a turbomachine for mounting in an outer casing of the turbomachine, the inner part having parts of a rotor provided for rotation in operation and elements of a stator formed as operating parts, the rotor extending along an axis.
  • the invention relates to a turbomachine with the inner part and a method for mounting the turbomachine.
  • Turbo compressor and method of the type defined above are already in the patent application EP 2 045 472 A1 known.
  • the method of assembling the turbomachine described in this patent application provides that an inner part of the turbomachine comprising the rotor and a stator as a finished assembled module is axially inserted into a circumferentially undivided outer casing.
  • the insertion opening into the pot-shaped outer housing which may also be referred to as a pot housing, is closed axially after reaching the end position of the inner part by means of a frontal lid.
  • the axial end faces of the outer housing or frontal cover are each provided with a passage opening through which one shaft end of the rotor is axially led out of the outer housing.
  • This shaft end can serve on the one hand for supporting the rotor and on the other hand for transmitting torques in front of or on the rotor of the turbomachine.
  • a shaft seal is usually provided for sealing the gap between the opening contour and the shaft surface of the rotor or rotor.
  • the shaft end is used on an axial side of the attachment of a so-called horsetail, which can also be referred to as an extension.
  • the horsetail is essentially an axial extension of the rotor at an axial shaft end. This extension is the support of the inner part against gravity in the phase of axial insertion into the cup-shaped outer housing, in which the inner part is already partially inserted into the outer housing, but the axial shaft end (without extension), which leads the insertion, not yet the axial frontal opening of the outer housing protrudes.
  • this extension which can be designed as a so-called horsetail (axially divisible) takes this vertically oriented load, so that the inner housing largely acting without friction normal force acting on the outer housing can be inserted axially. It is also conceivable that only a partial relief of the contact surface between the outer housing and the inner part takes place and the normal force between these two components by means of the horsetail is lowered only in the sense of a reduction in friction.
  • the term "horsetail” results from the fact that this axial extension can be disassembled into axial sections. This extension serves to support the inner part until the leading end of the shaft exits axially from the opposite housing outlet or opening. After exiting the shaft or the runner can be caught directly.
  • a disadvantage of the known method is that a special effort must be made to support the stator relative to the rotor of the inner part, so that it does not come to uncontrolled contacts and power transmissions between the rotor and the stator.
  • there is a large number of shaft seals in each turbomachine which can be designed, for example, as labyrinth seals.
  • the shaft seals in particular are components that are very sensitive, since, for example, in the case of the labyrinth seal, narrow sealing strips-or, in a two-dimensional view, sealing tips-are often used which are not suitable for transmitting large forces.
  • Other components of the stator and the rotor are not designed to accommodate the large weight forces of each adjacent module in the rule.
  • the invention has set itself the task, the cost and effort in the context of assembly for the purpose of supporting the stator relative to the rotor of the inner part of a turbomachine while not increasing the risk of damage.
  • the invention proposes a turbomachine and a method for assembling the turbomachine according to the respective claims.
  • the respective dependent claims contain advantageous developments of the invention.
  • the inner part of a turbo-machine is a component which can generally include all parts of the rotor, but need not necessarily comprise.
  • the inner part includes next to some of the rotor surrounded standing components, which are referred to here as a stator.
  • a preferred application of the invention relates to turbomachines designed as radial machines, in which a radial deflection takes place between the individual stages of the rotor in the stator. This radial deflection takes place by means of a circumferentially extending channel surrounding the rotor. These deflections are collectively referred to as return stages and usually include so-called intermediate floors, which are formed divided at least in an axially non-divisible rotor in the circumferential direction in a parting line.
  • shaft seal means in the context this document sealing elements of the stator and / or the rotor, such as a labyrinth seal, this term refers to the shaft seal as a whole, continuem means "shaft seal” sealing a gap between a rotor and a stator, not only on a housing outlet but possibly also on others Axial sections of the machine) that prevent flow of process fluid that is either compressed or expanded by the turbomachine toward lower pressure conditions.
  • the quality of this shaft seal directly affects the extent of unwanted secondary flows, so that, for example, the radial clearance of this shaft seal is a primary factor influencing the efficiency of such a turbomachine.
  • the individual intermediate floors may be combined axially and radially by means of a shell divided over circumferentially in the circumferential direction or shared by adjacent intermediate floors, so that the stator of the inner part forms a unit which is firmly joined together and attached to one another.
  • the individual intermediate floors may be fastened to one another in their part-joint plane by means of fastening elements and be combined axially relative to one another in another, if appropriate, manner.
  • the inner part has an at least provisionally firmly assembled stator, so that the inner part forms a transportable unit for itself.
  • the rotor is in this case in the inner part therefore arranged positively, because the wheels (this document uses the terms “impeller” and “wheels” synonym both individually and in compound terms) of the rotor in the return stages of the stator prevent an axial unlimited mobility.
  • the stator is axially movable from a first axial position to a second axial position relative to the stator.
  • a support shoulder extending in the circumferential direction is respectively provided on the stator and on the rotor radially concentrically opposite at two axially spaced locations, so that the rotor and the stator can be supported radially relative to one another by means of this support shoulder.
  • these support shoulders should be rotationally symmetrical, so that the support of the stator by means of the rotor relative to the weight of the stator is possible regardless of the circumferential position of the rotor.
  • the support shoulder extends in the circumferential direction rotationally symmetric in the stator, so that, for example, a lifting of the entire inner part while attaching the stop means on the stator is possible, so that the rotor can be raised indirectly via the stator of the inner part.
  • the abutment shoulders on the rotor are each located on a hub-side wheel disc of an impeller.
  • the blades act on the wheel disc as stiffening ribs and prevent buckling of the wheel disc under the load.
  • the abutment shoulder can also be provided on a cover plate of the impeller, in which case the forces must be transferred from the weight of the stator via impeller blades between the wheel disc and the cover plate of the respective impeller. This must be taken into account when designing the blades.
  • the support shoulder is provided at each of the outermost radial end of the wheel disc or the cover plate, so that does not create a separate paragraph in example, the wheel disc additional axial space requirement.
  • the axial displaceability from the first axial position to the second axial position of the rotor relative to the stator of the inner part is expediently also made possible by an axially wider wheel side space, so that the wheel disk axially engages in the extended width of the Radutzraums axial displacement, so that the 6.3schulter in the first axial position when engaged in the Radprocessraum wheel disc of the stator relative to the contact shoulder of the rotor is preferably located at the radially outer end of the wheel disc of the impeller.
  • This procedure also has the advantage that in the case of a stepped cover labyrinth, this shaft seal provides sufficient axial play in the case of the wheel-disk-side displacement direction.
  • the wheel disc in the region of the abutment shoulder rotationally symmetrical - convex in cross-section - be formed so that it comes over a part of the circumference slight force-induced elastic deformations of the wheel or the stator in the region of the respective abutment shoulder to a substantially linear support.
  • Line-shaped here means that the extent of the support surface is longer in the circumferential direction than in the axial direction.
  • the abutment shoulder can also be rotationally symmetrical conical - in cross section obliquely to the axis or axis of rotation - each be formed, so that the two abutment shoulder surfaces are oriented parallel to each other in axially parallel alignment of the stator and the rotor.
  • the cone bevel should in this case preferably be oriented such that the rotor is pressed against the stator with a pressure force perpendicular to the axis in the direction of an axial stop of the slope of the cone, so that an uncontrolled sliding of the abutment shoulders is excluded.
  • an advantageous development of the invention provides that the axial relative position of the stator and the rotor of the inner part can be fixed to each other by means of at least one fastening element.
  • the axial Relative position on an axial side by means of a securing element in a boundary region between the stator and the rotor, which is accessible from the outside, is fixed to at least one circumferential position by means of the securing element.
  • the rotor or the shaft of the rotor can be radially clamped by the fastening element, wherein the fastening element simultaneously contacts an axial reference surface of the stator, so that an axial movement is blocked at least unidirectionally, preferably bidirectionally, between the rotor and the stator.
  • a complete backup of the axial position can also follow by means of two such fasteners.
  • the axial end faces of the outer housing or frontal cover are each provided with a passage opening, through which in each case a shaft end of the rotor can be axially guided out of the outer housing.
  • This shaft end can serve on the one hand for permanent or transitional mounting of the rotor and on the other hand for transmitting torques in front of or on the rotor of the turbomachine.
  • the inventive method provides that initially the outer housing is provided. Subsequently, an axial extension in the sense of the above-mentioned horsetail to the rotor at a shaft end is mounted rigidly so that the inner part raised by the extension - or intercepted in terms of weight - can be.
  • the inner part can be raised at least on one axial side. It is not necessary that the entire inner part can be raised as a free end of this axial extension.
  • the connection between the extension and the shaft end must be rigid, so that the torques or bending moments arising from the transverse force can be transmitted to an axially spaced support of the extension.
  • the inner part is inserted by means of the extension in the outer housing, wherein the rotor is located to the stator of the inner part in the first axial position.
  • the axial extension or the horsetail guides this insertion movement and is axially supported by a frontal axial opening of the outer housing of this extension, so that a normal force between the inner part and the outer housing is at least reduced during the insertion process.
  • the rotor can be offset axially relative to the stator of the inner part in the second axial position.
  • This axial displacement of the rotor relative to the stator can take place with the aid of the horsetail, wherein the stator of the inner part in the outer housing, the rotor is relieved of the weight and the rotor can be maneuvered without this additional load in the second axial position.
  • FIG. 1 shows a part of a turbomachine TCO with an inner part IP.
  • the inner part IP is in FIG. 1 by means of an axial extension EXT mounted on a shaft end SHE of the rotor RO in an outer housing OC introduced in the axial direction.
  • the inner part IP comprises parts of a rotor RO provided for rotation during operation of the turbo-machine TCO and elements of a stator STA designed as stationary parts during operation.
  • the inner part IP is a transportable unit, which is preferably assembled at the point of commissioning of the turbomachine TCO with the outer housing OC.
  • the outer housing OC is formed as a circumferentially undivided so-called pot housing.
  • On at least one axial side of the outer housing is frontally provided with an axial opening, so that the inner part IP can be axially inserted into the outer housing OC.
  • a cover COV is preferably pushed axially onto a shaft end SHE of the rotor RO and attached there, so that this cover COV is also positioned with the axial insertion of the inner part IP for the purpose of attachment to the outer housing OC.
  • the rotor RO comprises a shaft SH and a plurality of impellers IMP or impeller shrunk onto the shaft.
  • the stator STA comprises a plurality of return stages BST, which are provided between the individual impellers IMP designed as radial impellers and which each have a fluidic return channel which extends radially outward from the latter Impeller IMP deflected flow of a process fluid back to radially inward deflected.
  • the return stages are equipped with aerodynamic guiding means, guide vanes for directing the flow of the process fluid.
  • the return stages BST which are also referred to as intermediate floors, provided with a parting line, which in a level which is substantially parallel to the axis X.
  • the return stages BST is also provided with a parting line holder CR (this holder may also be referred to as an inner housing) is provided, the return stages BST in the desired axial and Secures radial position to each other.
  • the return stages BST are attached directly to each other or attached, eg. screwed together.
  • the individual stages of the turbomachine TCO are sealed to one another by means of at least one shaft seal SSL.
  • the shaft seal seals SSL between a cover plate CW of the impeller IMP and the stator STA.
  • the impeller IMP has, in addition to the cover plate on blades BL and a wheel HW. By means of the wheel disc HW, the impeller IMP is fixed to the shaft SH of the rotor RO with a shaft-hub connection. The attachment secures the impeller IMP in axial, radial and tangential (against twisting) direction.
  • the rotor RO is designed to be displaceable relative to the stator STA between a first axial position AP1 and a second axial position AP2.
  • a corresponding Axialspielausteil the shaft seals SSL is provided and the Radreteippo WSR, which are fixed an axial clearance between the wheels IMP and the stator STA, are axially prepared accordingly.
  • the first axial position AP1 are located at two axially spaced locations (AL1, AL2) each extending in the circumferential direction CD Support shoulder SPS respectively on the stator STA and on the rotor RO each radially concentrically opposite, so that the rotor RO and the stator STA are supportable radially to each other by means of the support shoulders SPS.
  • FIGS. 5, 6 and 7 steps of the method according to the invention for mounting the turbomachine TCO are reproduced.
  • FIG. 5 shows the provision of the outer housing OC.
  • FIG. 6 shows how in the context of step b) an extension EXT has been attached axially to a shaft end SHE of the rotor RO of the inner part IP.
  • the inner part IP has already been partially inserted axially into the outer housing OC, wherein the axial extension EXT leads the insertion movement axially.
  • Step d) is in the FIG. 7 shown schematically, wherein the Figures 3 .
  • FIG. 7 also shows that the cover COV of the outer housing OC is moved axially together with the inner part IP in its end position before it is fastened by means of fastening elements to the outer housing OC.
  • the shaft end SHE which follows the axial movement, is held in the radial position by means of a support SUP '.
  • the inner part can also be supported by the stator STA by means of a support SUP '. Because it becomes complex in heavier designs to absorb the torque from the weight force over the shaft, As a rule, the support via the inner part IP is then preferred.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP15193213.4A 2015-11-05 2015-11-05 Partie interne pour une turbomachine, turbomachine et procédé de montage Withdrawn EP3165772A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP15193213.4A EP3165772A1 (fr) 2015-11-05 2015-11-05 Partie interne pour une turbomachine, turbomachine et procédé de montage
PCT/EP2016/074284 WO2017076584A1 (fr) 2015-11-05 2016-10-11 Élément intérieur pour turbomachine, turbomachine et procédé de montage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP15193213.4A EP3165772A1 (fr) 2015-11-05 2015-11-05 Partie interne pour une turbomachine, turbomachine et procédé de montage

Publications (1)

Publication Number Publication Date
EP3165772A1 true EP3165772A1 (fr) 2017-05-10

Family

ID=54539851

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15193213.4A Withdrawn EP3165772A1 (fr) 2015-11-05 2015-11-05 Partie interne pour une turbomachine, turbomachine et procédé de montage

Country Status (2)

Country Link
EP (1) EP3165772A1 (fr)
WO (1) WO2017076584A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017223791A1 (de) 2017-12-27 2019-06-27 Siemens Aktiengesellschaft Wellendichtungsanordnung einer Turbomaschine, Turbomaschine
EP3514396A1 (fr) 2018-01-22 2019-07-24 Siemens Aktiengesellschaft Dispositif pourvu d'un rotor et de deux paliers

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3537587A1 (de) * 1985-10-31 1987-04-23 Proizv Ob Nevskij Z Im V I Radialverdichter
EP0257098A1 (fr) * 1986-02-20 1988-03-02 Proizvodstvennoe Obiedinenie 'nevsky Zavod' Imeni V.I.Lenina Compresseur centrifuge
EP2045472A1 (fr) 2007-10-05 2009-04-08 Siemens Aktiengesellschaft Procédé pour le montage de turbomachines et son dispositif de réalisation

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3537587A1 (de) * 1985-10-31 1987-04-23 Proizv Ob Nevskij Z Im V I Radialverdichter
EP0257098A1 (fr) * 1986-02-20 1988-03-02 Proizvodstvennoe Obiedinenie 'nevsky Zavod' Imeni V.I.Lenina Compresseur centrifuge
EP2045472A1 (fr) 2007-10-05 2009-04-08 Siemens Aktiengesellschaft Procédé pour le montage de turbomachines et son dispositif de réalisation

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Publication number Publication date
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