EP0490773A1 - Multistage pump especially intended for pumping a multiphase fluid - Google Patents

Multistage pump especially intended for pumping a multiphase fluid Download PDF

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Publication number
EP0490773A1
EP0490773A1 EP91403381A EP91403381A EP0490773A1 EP 0490773 A1 EP0490773 A1 EP 0490773A1 EP 91403381 A EP91403381 A EP 91403381A EP 91403381 A EP91403381 A EP 91403381A EP 0490773 A1 EP0490773 A1 EP 0490773A1
Authority
EP
European Patent Office
Prior art keywords
shaft
impellers
rotor
main body
pump
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.)
Granted
Application number
EP91403381A
Other languages
German (de)
French (fr)
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EP0490773B1 (en
Inventor
Jean-Edmond Chaix
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.)
TechnicAtome SA
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TechnicAtome SA
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Publication date
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Publication of EP0490773A1 publication Critical patent/EP0490773A1/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
    • F04D29/00—Details, component parts, or accessories
    • F04D29/04—Shafts or bearings, or assemblies thereof
    • F04D29/041—Axial thrust balancing
    • F04D29/0413—Axial thrust balancing hydrostatic; hydrodynamic thrust bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D1/04—Helico-centrifugal 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
    • F04D29/04—Shafts or bearings, or assemblies thereof
    • F04D29/043—Shafts
    • 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
    • F04D29/18—Rotors
    • F04D29/185—Rotors consisting of a plurality of wheels
    • 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
    • F04D29/628—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for liquid 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
    • F04D31/00—Pumping liquids and elastic fluids at the same time
    • 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
    • Y10T29/49316—Impeller making
    • Y10T29/49336—Blade making
    • 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
    • Y10T29/49826—Assembling or joining
    • Y10T29/49863—Assembling or joining with prestressing of part
    • Y10T29/49865—Assembling or joining with prestressing of part by temperature differential [e.g., shrink fit]
    • 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
    • Y10T29/49995—Shaping one-piece blank by removing material

Definitions

  • the invention relates generally to all multi-stage pumps using a long rotor equipped with blades and, in particular the axial or helical-axial pumps used for pumping effluents with double phase.
  • the pumping of the fluid consisting of a mixture of petroleum and petroleum gases in the context of the exploitation of petroleum deposits, and in particular of deposits at sea.
  • multi-stage double-phase pumps which can be associated with a motor unit, in order to allow the high-flow evacuation of a double-phase or multi-phase fluid such as petroleum effluents.
  • these pumps consist of a rotor comprising a main shaft 100 on which impellers 102 are fixed.
  • each impeller 102 is done by means of a key 106 inserted into a slot made for this purpose in the main shaft 100.
  • This precise adjustment is relatively expensive.
  • This assembly allows the rotor to be removable, but by this fact makes the rotor difficult to balance after each change of impellers.
  • the invention aims to remedy this drawback by proposing a multi-stage pump with a different design concerning the rotor.
  • the shaft and the impellers constitute a one-piece assembly produced independently.
  • This one-piece structure allows simple mounting and precise balancing of the entire shaft and the impellers constituting the rotor of the pump.
  • the central part of the main body consists of at least as many washers as there are stages.
  • the assembly consisting of the shaft and the impellers is manufactured from a single piece in which the impellers are machined.
  • the impellers consist of rings hooped on the shaft.
  • each rectifier consists of two half-rings inserted in the annular space separating two impellers and maintained in axial and angular position by washers of which the stack constitutes the main body of the machine.
  • the washers forming the main body are held in place between the inlet and outlet flanges by means of studs connecting these flanges.
  • the shaft is a tube and is terminated at its ends by two pins thus making it possible to mount the free shaft in rotation in the main body by means of bearings.
  • the pump according to the invention is particularly intended for pumping two-phase effluents.
  • the pump according to the invention comprises a pump body 2 which is an assembly, of cylindrical shape over most of its length.
  • the pump rotor mainly consists of a shaft 10 mounted rotating around the longitudinal axis 1 of the body 2. The latter is closed at its ends by flanges (in this case an inlet flange 6 and a flange
  • the shaft 10 is made in the form of a tube. Its two ends consist of two support pins 16 and 18 by means of which the shaft 10 is mounted to rotate in the body 2 by means of two respective bearings 17 and 19.
  • the entire pump is kept assembled by means of studs 4 screwed into a fixing ring 8 and tightened by means of a nut 5 bearing on the inlet flange 6.
  • the pump is advantageously supplemented at one end by a housing consisting of a ring 22 and the fixing ring 8 on the inside diameter of which can bear the external mounting of the bearing 15 and the stop 19 of said end.
  • the pump can be completed with a warhead 24, centered on the axis 1 of the pump. On the inside diameter of this warhead, can bear the outer ring of the bearing 17 corresponding to this end.
  • the driving force is communicated to the fluid by the pump by means of the impellers 12 integral with the shaft 10 and the rectifiers 14, integral with the body 2 and placed in an interposed manner between the impellers 12.
  • the channel created by the gap between the rotor consisting on the one hand of the shaft 10 and the impellers 12 and on the other hand of the stator consisting of the body 2 and the rectifiers 14 delimits the path of the fluid passing through the pump.
  • the outlet flange 20 comprises a cavity 26 placed at the outlet of this channel so as to collect the propelled fluid, thus making it possible to evacuate it by means of an outlet pipe 28.
  • the impellers 12A are mounted on the shaft 10A by obtaining a determined external diameter of the shaft 10 and by boring each thruster 12A to a diameter equal to the external diameter of the shaft 10, so that each impeller 12 can be slidably mounted around the shaft 10 during hot shrinking, the impellers 12 being expanded. The cooling of these ensures their final fixation.
  • This one-piece structure allows the rotor, once balanced, to reach higher rotational speeds than those of a rotor consisting of impellers mounted by keying, without generating vibrations. It is noted that speeds of up to 7000 revolutions per minute can be obtained by means of such a hollow shaft with an outside diameter of the order of 240 mm.
  • the mounting of the support pins 16 and 18 can also be obtained by shrinking.
  • the impellers 12B can be an integral part of the shaft 10B. In this case, they are shaped by machining a thick tube whose initial diameter is greater than the external diameter of the impellers 12B.
  • the rotor thus obtained obviously has a one-piece structure having the same advantages as those of the rotor described with reference to FIG. 3A.
  • the body 2 of the pump preferably consists of washers 3 secured by the studs 4.
  • the design of the pump according to the invention provides several advantages of mounting it.
  • this figure represents the lower end of the pump, with the rotor mounted rotating in the last washer 30 in the stack of the body 2, via any bearing.
  • the outer ring of the latter is supported on the last washer 30, the inner ring thereof is supported on a sleeve 32 hooped on the support pin 16.
  • the nose 24 acts as a cover for this assembly.
  • the rectifiers 14 each consist of two half-rectifiers 14A and 14B each having the shape of a semicircle. This allows each rectifier to be mounted by positioning each side of the shaft 10 on each side of these half-rectifiers 14A and 14B and bringing them closer to the shaft 10, as indicated by the two horizontal arrows in this figure. Each rectifier is thus interposed between two impellers 12. This maneuver is better illustrated by FIG. 5 where only the half-rectifiers 14A and 14B are represented in the position which allows them to be inserted between two impellers 12. This figure also each represents washers 3 constituting the body 2 of the pump.
  • the structure of the rotor makes it possible to reach speeds equal to 7000 revolutions per minute without exceeding the maximum critical speed of this rotor with twelve to fifteen stages, which makes the pump according to the invention particularly well suited for pumping oil presenting itself. in the form of a liquid phase and a gas phase, with significant flow rates.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Jet Pumps And Other Pumps (AREA)
  • Non-Positive Displacement Air Blowers (AREA)
  • Control Of Non-Positive-Displacement Pumps (AREA)

Abstract

The axial pump makes it possible to deliver a fluid having a double gaseous-liquid phase at high flow rates. It is constituted by a one-piece rotor comprising a hollow shaft (10) onto which are shrunk pulsating systems (12). This rotor is placed within a body (2) constituted by a stack of washers (3) within which are fixed straighteners (14). Each straightener is constituted by two half-straighteners, so as to permit the installation of each straightener around the rotor. Everything is sealed by end flanges on which the rotor is mounted in rotary manner. The pulsating systems (12) can also be machined on the outer surface of the body (10).

Description

DOMAINE DE L'INVENTIONFIELD OF THE INVENTION

L'invention concerne de manière générale toutes les pompes multi-étagées utilisant un rotor de grande longueur équipé d'aubes et, en particulier les pompes axiales ou hélico-axiales utilisées pour le pompage des effluents à double phase. Par exemple, on peut citer le pompage du fluide constitué d'un mélange de pétrole et de gaz de pétrole dans le cadre d'exploitation de gisements de pétrole, et en particulier de gisements en mer.The invention relates generally to all multi-stage pumps using a long rotor equipped with blades and, in particular the axial or helical-axial pumps used for pumping effluents with double phase. For example, mention may be made of the pumping of the fluid consisting of a mixture of petroleum and petroleum gases in the context of the exploitation of petroleum deposits, and in particular of deposits at sea.

ART ANTERIEURPRIOR ART

Dans la mise en oeuvre d'un récent procédé d'exploitation des gisements marins, les effluents, contenant à la fois du pétrole liquide et du gaz de pétrole, ne sont plus traités sur une plateforme implantée à proximité immédiate, mais sont évacués directement vers la côte ou vers une plateforme existante située à distance. Ces effluents étant composés d'un fluide multiphasique, il s'avère nécessaire de disposer de groupes motopompes capables d'évacuer à partir d'un gisement plusieurs dizaines de mètres cubes d'effluents par heure.In the implementation of a recent process for exploiting marine deposits, the effluents, containing both liquid petroleum and petroleum gas, are no longer treated on a platform located in the immediate vicinity, but are discharged directly to the coast or to an existing remote platform. These effluents being composed of a multiphasic fluid, it turns out to be necessary to have motor-pump groups capable of evacuating from a deposit several tens of cubic meters of effluents per hour.

Dans ce but, on utilise des pompes multi-étagées à double phase pouvant être associées à un groupe moteur, en vue de permettre l'évacuation à grand débit d'un fluide à double phase ou multiphasique tel que les effluents pétroliers.For this purpose, use is made of multi-stage double-phase pumps which can be associated with a motor unit, in order to allow the high-flow evacuation of a double-phase or multi-phase fluid such as petroleum effluents.

En référence à la figure 2, ces pompes sont constituées d'un rotor comprenant un arbre principal 100 sur lequel sont fixés des impulseurs 102.With reference to FIG. 2, these pumps consist of a rotor comprising a main shaft 100 on which impellers 102 are fixed.

Comme le montre la figure 2, la fixation de chaque impulseur 102 se fait au moyen d'une clavette 106 introduite dans une fente pratiquée à cet effet dans l'arbre principal 100. Ceci entraîne la réalisation d'un ajustement précis de l'usinage du diamètre intérieur de l'impulseur 102 par rapport au diamètre extérieur de l'arbre 100. Cet ajustement précis coûte relativement cher. Ce montage permet au rotor d'être démontable, mais par ce fait rend le rotor difficile à équilibrer après chaque changement d'impulseurs. L'invention vise à remédier à cet inconvénient en proposant une pompe multi-étagée avec une conception différente concernant le rotor.As shown in FIG. 2, the fixing of each impeller 102 is done by means of a key 106 inserted into a slot made for this purpose in the main shaft 100. This results in the achievement of a precise adjustment of the machining. the inside diameter of the impeller 102 relative to the outside diameter of the shaft 100. This precise adjustment is relatively expensive. This assembly allows the rotor to be removable, but by this fact makes the rotor difficult to balance after each change of impellers. The invention aims to remedy this drawback by proposing a multi-stage pump with a different design concerning the rotor.

RESUME DE L'INVENTIONSUMMARY OF THE INVENTION

A cet effet, l'objet principal de l'invention est une pompe multiphasique comprenant :

  • un corps principal fermé à ses deux extrémités par une bride d'entrée et une bride de sortie ;
  • un arbre placé dans le corps principal et sur lequel sont solidarisés des impulseurs ;
  • des redresseurs fixés à l'intérieur du corps principal et placés en alternance avec les impulseurs.
To this end, the main object of the invention is a multiphase pump comprising:
  • a main body closed at both ends by an inlet flange and an outlet flange;
  • a shaft placed in the main body and on which impellers are secured;
  • rectifiers fixed inside the main body and placed alternately with the impellers.

Selon l'invention l'arbre et les impulseurs constituent un ensemble monobloc réalisé indépendamment. Cette structure monobloc permet un montage simple et un équilibrage précis de l'ensemble de l'arbre et des impulseurs constituant le rotor de la pompe. De plus, la partie centrale du corps principal est constituée d'au moins autant de rondelles qu'il y a d'étages.According to the invention, the shaft and the impellers constitute a one-piece assembly produced independently. This one-piece structure allows simple mounting and precise balancing of the entire shaft and the impellers constituting the rotor of the pump. In addition, the central part of the main body consists of at least as many washers as there are stages.

Dans une première réalisation de la pompe, l'ensemble constitué de l'arbre et des impulseurs est fabriqué à partir d'une seule et unique pièce dans laquelle les impulseurs sont usinés.In a first embodiment of the pump, the assembly consisting of the shaft and the impellers is manufactured from a single piece in which the impellers are machined.

Dans une deuxième réalisation de la pompe, les impulseurs sont constitués de couronnes frettées sur l'arbre.In a second embodiment of the pump, the impellers consist of rings hooped on the shaft.

Dans un mode particulier de réalisation de la pompe selon l'invention, chaque redresseur est constitué de deux demi-couronnes inserées dans l'espace annulaire séparant deux impulseurs et maintenu en position axiale et angulaire par des rondelles dont l'empilage constitue le corps principal de la machine.In a particular embodiment of the pump according to the invention, each rectifier consists of two half-rings inserted in the annular space separating two impellers and maintained in axial and angular position by washers of which the stack constitutes the main body of the machine.

Selon une réalisation préférentielle de l'invention, les rondelles formant le corps principal sont maintenues en place entre les brides d'entrée et de sortie au moyen de goujons reliant ces brides.According to a preferred embodiment of the invention, the washers forming the main body are held in place between the inlet and outlet flanges by means of studs connecting these flanges.

De préférence, l'arbre est un tube et est terminé à ses extrémités par deux tourillons permettant ainsi de monter l'arbre libre en rotation dans le corps principal par l'intermédiaire de paliers.Preferably, the shaft is a tube and is terminated at its ends by two pins thus making it possible to mount the free shaft in rotation in the main body by means of bearings.

La pompe selon l'invention est particulièrement destinée au pompage d'effluents à double phase.The pump according to the invention is particularly intended for pumping two-phase effluents.

L'invention et toutes les caractéristiques techniques seront mieux comprises à la lecture de la description ci-après.The invention and all the technical characteristics will be better understood on reading the description below.

LISTE DES FIGURESLIST OF FIGURES

La description est accompagnée de différentes figures représentant respectivement :

  • figure 1, en coupe, la pompe selon l'invention ;
  • figure 2, la structure de l'arbre des pompes multi-étagées double phase de l'art antérieur ;
  • figures 3A et 3B, la structure de l'arbre de la pompe selon l'invention ;
  • figure 4, en coupe détaillée, une partie de la pompe, pour expliquer le montage de celle-ci ;
  • figure 5, en schéma éclaté, le montage des redresseurs autour de l'arbre de la pompe selon l'invention.
The description is accompanied by various figures representing respectively:
  • Figure 1, in section, the pump according to the invention;
  • FIG. 2, the structure of the shaft of the double-stage multi-stage pumps of the prior art;
  • Figures 3A and 3B, the structure of the pump shaft according to the invention;
  • Figure 4, in detailed section, a part of the pump, to explain the mounting thereof;
  • Figure 5, in exploded diagram, the mounting of the rectifiers around the pump shaft according to the invention.

DESCRIPTION DETAILLEE D'UNE REALISATION DE LA POMPE SELON L'INVENTIONDETAILED DESCRIPTION OF AN IMPLEMENTATION OF THE PUMP ACCORDING TO THE INVENTION

En référence à la figure 1, la pompe selon l'invention comprend un corps de pompe 2 qui est un assemblage, de forme cylindrique sur la majeure partie de sa longueur. Le rotor de la pompe est constitué principalement d'un arbre 10 monté tournant autour de l'axe longitudinal 1 du corps 2. Ce dernier est fermé à ses extrémités par des brides (en l'occurrence une bride d'entrée 6 et une bride de sortie 20).Pour minimiser le poids du rotor, l'arbre 10 est réalisé sous la forme d'un tube. Ses deux extrémités sont constituées de deux tourillons de support 16 et 18 au moyen desquels l'arbre 10 est monté tournant dans le corps 2 par l'intermédiaire de deux paliers respectifs 17 et 19.Referring to Figure 1, the pump according to the invention comprises a pump body 2 which is an assembly, of cylindrical shape over most of its length. The pump rotor mainly consists of a shaft 10 mounted rotating around the longitudinal axis 1 of the body 2. The latter is closed at its ends by flanges (in this case an inlet flange 6 and a flange To minimize the weight of the rotor, the shaft 10 is made in the form of a tube. Its two ends consist of two support pins 16 and 18 by means of which the shaft 10 is mounted to rotate in the body 2 by means of two respective bearings 17 and 19.

L'ensemble de la pompe est maintenu assemblé au moyen de goujons 4 vissés dans une bague de fixation 8 et serrés au moyen d'un écrou 5 prenant appui sur la bride d'entrée 6.The entire pump is kept assembled by means of studs 4 screwed into a fixing ring 8 and tightened by means of a nut 5 bearing on the inlet flange 6.

La pompe est avantageusement complétée à une extrémité par un boîtier constitué d'une bague 22 et de la bague de fixation 8 sur le diamètre intérieur duquel peut prendre appui le montage externe du palier 15 et de la butée 19 de ladite extrémité. A l'autre extrémité, la pompe peut être complétée d'une ogive 24, centrée sur l'axe 1 de la pompe. Sur le diamètre intérieur de cette ogive, peut s'appuyer la bague externe du palier 17 correspondant à cette extrémité.The pump is advantageously supplemented at one end by a housing consisting of a ring 22 and the fixing ring 8 on the inside diameter of which can bear the external mounting of the bearing 15 and the stop 19 of said end. At the other end, the pump can be completed with a warhead 24, centered on the axis 1 of the pump. On the inside diameter of this warhead, can bear the outer ring of the bearing 17 corresponding to this end.

La force motrice est communiquée au fluide par la pompe au moyen des impulseurs 12 solidaires de l'arbre 10 et des redresseurs 14, solidaires du corps 2 et placés de manière intercalée entre les impulseurs 12. Le canal créé par l'intervalle entre le rotor constitué d'une part de l'arbre 10 et des impulseurs 12 et d'autre part du stator constitué du corps 2 et des redresseurs 14 délimite le parcours du fluide traversant la pompe.The driving force is communicated to the fluid by the pump by means of the impellers 12 integral with the shaft 10 and the rectifiers 14, integral with the body 2 and placed in an interposed manner between the impellers 12. The channel created by the gap between the rotor consisting on the one hand of the shaft 10 and the impellers 12 and on the other hand of the stator consisting of the body 2 and the rectifiers 14 delimits the path of the fluid passing through the pump.

La bride de sortie 20 comprend une cavité 26 placée à la sortie de ce canal de manière à recueillir le fluide propulsé permettant ainsi de l'évacuer au moyen d'une conduite de sortie 28.The outlet flange 20 comprises a cavity 26 placed at the outlet of this channel so as to collect the propelled fluid, thus making it possible to evacuate it by means of an outlet pipe 28.

Sur la figure 1, les impulseurs 12 du rotor selon l'art antérieur, ont été représentés, au moyen de hachures uniques, comme faisant partie intégrante de l'arbre 10. L'ensemble du rotor ainsi constitué est donc monobloc et indémontable. Une fois que le rotor est monté tournant autour d'un axe quelconque de rotation, il est ainsi possible de l'équilibrer dynamiquement et statiquement, cet équilibrage restant figé pour toute la durée de vie du rotor.In Figure 1, the impellers 12 of the rotor according to the prior art, have been shown, by means of single hatching, as an integral part of the shaft 10. The rotor assembly thus formed is therefore in one piece and cannot be dismantled. Once the rotor is mounted rotating around any axis of rotation, it is thus possible to balance it dynamically and statically, this balancing remaining fixed for the entire lifetime of the rotor.

En référence à la figure 3A, le montage des impulseurs 12A sur l'arbre 10A se fait par l'obtention d'un diamètre externe déterminé de l'arbre 10 et par l'alésage de chaque propulseur 12A à un diamètre égal au diamètre externe de l'arbre 10, de manière à ce que chaque impulseur 12 puisse être monté par glissement autour de l'arbre 10 au cours d'un frettage à chaud, les impulseurs 12 étant dilatés. Le refroidissement de ceux-ci assure leur fixation définitive.Referring to FIG. 3A, the impellers 12A are mounted on the shaft 10A by obtaining a determined external diameter of the shaft 10 and by boring each thruster 12A to a diameter equal to the external diameter of the shaft 10, so that each impeller 12 can be slidably mounted around the shaft 10 during hot shrinking, the impellers 12 being expanded. The cooling of these ensures their final fixation.

Cette structure monobloc permet au rotor, une fois équilibré, d'atteindre des vitesses de rotation supérieures à celles d'un rotor constitué d'impulseurs montés par clavetage, sans engendrer de vibrations. On note que des vitesses allant jusqu'à 7 000 tours par minute peuvent être obtenues au moyen d'un tel arbre creux de diamètre extérieur de l'ordre de 240 mm.This one-piece structure allows the rotor, once balanced, to reach higher rotational speeds than those of a rotor consisting of impellers mounted by keying, without generating vibrations. It is noted that speeds of up to 7000 revolutions per minute can be obtained by means of such a hollow shaft with an outside diameter of the order of 240 mm.

On note également que la structure d'un arbre en tube permet une économie de poids considérable tout en maintenant un moment d'inertie en rotation par rapport à l'axe longitudinal de la pompe très important.It is also noted that the structure of a tube shaft allows considerable weight savings while maintaining a moment of inertia in rotation relative to the longitudinal axis of the pump which is very significant.

Le montage des tourillons de support 16 et 18 peut également être obtenu par frettage.The mounting of the support pins 16 and 18 can also be obtained by shrinking.

En référence à la figure 3B, les impulseurs 12B peuvent faire partie intégrante de l'arbre 10B. Dans ce cas, ils sont façonnés par usinage d'un tube épais dont le diamètre initial est supérieur au diamètre externe des impulseurs 12B. Le rotor ainsi obtenu a évidemment une structure monobloc ayant les mêmes avantages que celles du rotor décrits en regard de la figure 3A.Referring to Figure 3B, the impellers 12B can be an integral part of the shaft 10B. In this case, they are shaped by machining a thick tube whose initial diameter is greater than the external diameter of the impellers 12B. The rotor thus obtained obviously has a one-piece structure having the same advantages as those of the rotor described with reference to FIG. 3A.

Le corps 2 de la pompe est constitué de manière préférentielle de rondelles 3 solidarisées par les goujons 4.The body 2 of the pump preferably consists of washers 3 secured by the studs 4.

En référence à la figure 4, la conception de la pompe selon l'invention confère plusieurs avantages de montage de celle-ci.Referring to Figure 4, the design of the pump according to the invention provides several advantages of mounting it.

En effet, cette figure représente l'extrémité inférieure de la pompe, avec le rotor monté tournant dans la dernière rondelle 30 dans l'empilement du corps 2, par l'intermédiaire d'un palier quelconque. La bague extérieure de ce dernier prend appui sur la dernière rondelle 30, la bague intérieure de celui-ci prend appui sur un fourreau 32 fretté sur le tourillon support 16. L'ogive 24 fait office de couvercle à ce montage.In fact, this figure represents the lower end of the pump, with the rotor mounted rotating in the last washer 30 in the stack of the body 2, via any bearing. The outer ring of the latter is supported on the last washer 30, the inner ring thereof is supported on a sleeve 32 hooped on the support pin 16. The nose 24 acts as a cover for this assembly.

Selon l'invention, les redresseurs 14 sont constitués chacun de deux demi-redresseurs 14A et 14B ayant chacun la forme d'un demi-cercle. Ceci permet de monter chaque redresseur en positionnant de part et d'autre de l'arbre 10 chacun de ces demi-redresseurs 14A et 14B et de les rapprocher vers l'arbre 10, comme l'indiquent les deux flèches horizontales sur cette figure. Chaque redresseur est ainsi intercalé entre deux impulseurs 12. Cette manoeuvre est mieux illustrée par la figure 5 où seuls les demi-redresseurs 14A et 14B sont représentés dans la position qui leur permet d'être insérés entre deux impulseurs 12. Cette figure représente également chacune des rondelles 3 constituant le corps 2 de la pompe.According to the invention, the rectifiers 14 each consist of two half-rectifiers 14A and 14B each having the shape of a semicircle. This allows each rectifier to be mounted by positioning each side of the shaft 10 on each side of these half-rectifiers 14A and 14B and bringing them closer to the shaft 10, as indicated by the two horizontal arrows in this figure. Each rectifier is thus interposed between two impellers 12. This maneuver is better illustrated by FIG. 5 where only the half-rectifiers 14A and 14B are represented in the position which allows them to be inserted between two impellers 12. This figure also each represents washers 3 constituting the body 2 of the pump.

Lors du montage, une fois le rotor monté de manière à former un ensemble monobloc, celui-ci est entouré de tous les redresseurs 14 maintenus par les rondelles 3 de la manière qui vient d'être décrite.During assembly, once the rotor is mounted so as to form a one-piece assembly, it is surrounded by all the rectifiers 14 held by the washers 3 in the manner which has just been described.

Ensuite, l'ensemble constitué du rotor complété des rondelles 3 contenant les redresseurs 14 est monté verticalement sur les pièces d'extrémité 6 et 8 par l'intermédiaire des paliers correspondants. Une rondelle 3 est alors enfilée sur le rotor, vient s'appuyer et se centrer sur celle qui la précède et immobilise en position les deux demi-redresseurs. Chaque rondelle 3 bloque en rotation le redresseur 14 correspondant au moyen d'un indexage angulaire. Ce type de montage est à la fois simple est sûr.Then, the assembly consisting of the rotor completed by the washers 3 containing the rectifiers 14 is mounted vertically on the end pieces 6 and 8 by means of the corresponding bearings. A washer 3 is then threaded onto the rotor, comes to rest and center on the one which precedes it and immobilizes in position the two half-rectifiers. Each washer 3 blocks in rotation the rectifier 14 corresponding by means of an angular indexing. This type of mounting is both simple and safe.

La structure du rotor permet d'atteindre des vitesses égales à 7 000 tours par minute sans dépasser la vitesse critique maximale de ce rotor avec douze à quinze étages, ce qui rend la pompe selon l'invention particulièrement bien adaptée pour refouler du pétrole se présentant sous la forme d'une phase liquide et d'une phase gazeuse, avec des débits importants.The structure of the rotor makes it possible to reach speeds equal to 7000 revolutions per minute without exceeding the maximum critical speed of this rotor with twelve to fifteen stages, which makes the pump according to the invention particularly well suited for pumping oil presenting itself. in the form of a liquid phase and a gas phase, with significant flow rates.

Claims (7)

Pompe multi-étagée comprenant : - un corps principal (2) fermé à ses deux extrémités par des brides d'entrée (6) et de sortie (20) ; - un arbre (10) placé dans le corps principal (2) et sur lequel sont solidarisés des impulseurs (12) ; - des redresseurs (14) fixés à l'intérieur du corps principal (2) et placés en alternance avec les impulseurs (12), caractérisée en ce que l'arbre (10) et les impulseurs (12) constituent un ensemble monobloc et que la partie centrale du corps principal (2) est constituée d'au moins autant de rondelles (3) qu'il y a d'étages.Multi-stage pump comprising: - a main body (2) closed at its two ends by inlet (6) and outlet (20) flanges; - a shaft (10) placed in the main body (2) and on which the impellers (12) are secured; - rectifiers (14) fixed inside the main body (2) and placed alternately with the impellers (12), characterized in that the shaft (10) and the impellers (12) constitute a one-piece assembly and that the central part of the main body (2) consists of at least as many washers (3) as there are floors. Pompe selon la revendication 1, caractérisée en ce que l'ensemble constitué de l'arbre (10B) et des impulseurs (12B) est fabriqué à partir d'une seule et unique pièce dans laquelle les impulseurs (12B) sont usinés.Pump according to claim 1, characterized in that the assembly consisting of the shaft (10B) and the impellers (12B) is produced from a single piece in which the impellers (12B) are machined. Pompe selon la revendication 1, caractérisée en ce que les impulseurs (12A) sont des couronnes frettées sur l'arbre (10A).Pump according to claim 1, characterized in that the impellers (12A) are crowns hooped on the shaft (10A). Pompe selon l'une quelconque des revendications précédentes, caractérisée en ce que chaque redresseur (14) est constitué de deux demi-couronnes (14A, 14B) insérées dans une rondelle (3), de manière à permettre leur montage autour de l'ensemble constitué de l'arbre (10) et des impulseurs (12).Pump according to any one of the preceding claims, characterized in that each rectifier (14) consists of two half-rings (14A, 14B) inserted in a washer (3), so as to allow their mounting around the assembly consisting of the shaft (10) and the impellers (12). Pompe selon l'une quelconque des revendications précédentes, caractérisée en ce que les brides (6) et (20) sont maintenues aux extrémités du corps principal au moyen de goujons (4).Pump according to any one of the preceding claims, characterized in that the flanges (6) and (20) are held at the ends of the main body by means of studs (4). Pompe selon l'une quelconque des revendications précédentes, caractérisée en ce que l'arbre (10) est un tube et est terminé à ses extrémités par deux tourillons de supports (16, 18) permettant de monter l'arbre (10) libre en rotation dans le corps principal (2) par l'intermédiaire de paliers (17, 19).Pump according to any one of the preceding claims, characterized in that the shaft (10) is a tube and is terminated at its ends by two support pins (16, 18) making it possible to mount the free shaft (10) in rotation in the main body (2) by means of bearings (17, 19). Pompe selon l'une quelconque des revendications précédentes, destinée au pompage d'effluents à double phase.Pump according to any one of the preceding claims, intended for pumping two-phase effluents.
EP91403381A 1990-12-14 1991-12-13 Multistage pump especially intended for pumping a multiphase fluid Expired - Lifetime EP0490773B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9015698 1990-12-14
FR909015698A FR2670539B1 (en) 1990-12-14 1990-12-14 MULTI-STAGE PUMP PARTICULARLY FOR PUMPING A MULTIPHASIC FLUID.

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EP0490773A1 true EP0490773A1 (en) 1992-06-17
EP0490773B1 EP0490773B1 (en) 1995-10-04

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EP91403381A Expired - Lifetime EP0490773B1 (en) 1990-12-14 1991-12-13 Multistage pump especially intended for pumping a multiphase fluid

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US (1) US5253977A (en)
EP (1) EP0490773B1 (en)
JP (1) JPH04292588A (en)
AT (1) ATE128755T1 (en)
BR (1) BR9105410A (en)
DE (1) DE69113587T2 (en)
ES (1) ES2079607T3 (en)
FR (1) FR2670539B1 (en)
GR (1) GR3017849T3 (en)
MX (1) MX9102415A (en)
NO (1) NO914903L (en)

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FR2697870A1 (en) * 1992-11-09 1994-05-13 Technicatome Low output axial pump for two-phase mixt. - esp. for pumping oil and gas mixt. from oil well

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NO333314B1 (en) 2009-07-03 2013-04-29 Aker Subsea As Turbo machine and impeller
EP2386767B1 (en) * 2010-05-11 2021-01-06 Sulzer Management AG Helico-axial pump and method for bearing a rotor in a helico-axial pump
EP2386766B1 (en) * 2010-05-11 2022-10-12 Sulzer Management AG Helico-axial pump, rotor for same, method for hydrodynamic bearing of a rotor of a helicon-axial pump and a hybrid pump with a rotor for a helico-axial pump
EP2818722B1 (en) * 2013-06-24 2019-01-09 Grundfos Holding A/S Centrifugal pump
US11466696B2 (en) * 2016-12-28 2022-10-11 Upwing Energy, Inc. Downhole blower system with bearings and seals
US20190277302A1 (en) * 2018-03-07 2019-09-12 Onesubsea Ip Uk Limited System and methodology to facilitate pumping of fluid
RU188870U1 (en) * 2018-11-06 2019-04-25 Акционерное общество (АО) "Научно-исследовательский институт "Лопастных машин" ("НИИ ЛМ") HORIZONTAL CONSOLE VALVE PUMP
CA3061943A1 (en) * 2018-11-21 2020-05-21 Sulzer Management Ag Multiphase pump
RU203924U1 (en) * 2020-12-16 2021-04-28 федеральное государственное автономное образовательное учреждение высшего образования "Российский государственный университет нефти и газа (национальный исследовательский университет) имени И.М. Губкина" PUMP

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Also Published As

Publication number Publication date
NO914903L (en) 1992-06-15
FR2670539A1 (en) 1992-06-19
FR2670539B1 (en) 1994-09-02
ES2079607T3 (en) 1996-01-16
EP0490773B1 (en) 1995-10-04
GR3017849T3 (en) 1996-01-31
DE69113587T2 (en) 1996-04-04
JPH04292588A (en) 1992-10-16
DE69113587D1 (en) 1995-11-09
US5253977A (en) 1993-10-19
BR9105410A (en) 1992-08-25
ATE128755T1 (en) 1995-10-15
NO914903D0 (en) 1991-12-12
MX9102415A (en) 1992-09-01

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