FR2525699A1 - Centrifugal pump with easily replaceable rotor seal - uses hollow shaft coupled to drive with detachable coupling to coaxial shaft which can be withdrawn to give seal access - Google Patents
Centrifugal pump with easily replaceable rotor seal - uses hollow shaft coupled to drive with detachable coupling to coaxial shaft which can be withdrawn to give seal access Download PDFInfo
- Publication number
- FR2525699A1 FR2525699A1 FR8207289A FR8207289A FR2525699A1 FR 2525699 A1 FR2525699 A1 FR 2525699A1 FR 8207289 A FR8207289 A FR 8207289A FR 8207289 A FR8207289 A FR 8207289A FR 2525699 A1 FR2525699 A1 FR 2525699A1
- Authority
- FR
- France
- Prior art keywords
- shaft
- machine
- pump
- seal
- rotor
- 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- Withdrawn
Links
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
- F04D29/043—Shafts
- F04D29/044—Arrangements for joining or assembling 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
- F04D29/08—Sealings
- F04D29/10—Shaft sealings
- F04D29/12—Shaft sealings using sealing-rings
- F04D29/126—Shaft sealings using sealing-rings 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
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
L'invention se rapporte à une machine rotative destinée à mettre un fluide en mouvement et possédant un arbre créant une liaison mécanique entre les parties mobiles internes,quisont baignées par le fluide,et la ou les parties extérieures, non baignées par le fluide,chargées de guider,maintenir,et entrainer le dit arbre
Sur une machine de ce type,îl est nécessaire que,entre les parties de l'arbre baignées ou non baignées par le fluide,on dispose un ou plusieurs organes d'étanchéité supprimant ou réduisant les écoulements de fluide.The invention relates to a rotary machine intended to set a fluid in motion and having a shaft creating a mechanical connection between the internal movable parts, which are bathed by the fluid, and the external part or parts, not bathed by the fluid, charged to guide, maintain, and train the said tree
On a machine of this type, it is necessary that, between the parts of the shaft bathed or not bathed by the fluid, there is one or more sealing members suppressing or reducing the flow of fluid.
Les deux grands groupes de machines rotatives qui correspondent à cette définition sont,d'une part,les machines mettant en mouvement des fluides compressibles,tels les ventilateurs,et,d'autre part,les machines mettant en mouvement des fluides incompressibles dits liquides,telles les pompes centrifuges,qui possèdent logés dans un carter fise,un ou plusieurs mobiles fixés sur un arbre qui leur transmet l'énergie nécéssaire a' la mise en mouvement,par effet centrituge,d'un fluide généralement liquide. The two main groups of rotary machines which correspond to this definition are, on the one hand, machines setting in motion compressible fluids, such as fans, and, on the other hand, machines setting in motion incompressible fluids called liquids, such as centrifugal pumps, which have housed in a crankcase, one or more mobiles fixed on a shaft which transmits to them the energy necessary for the setting in motion, by centralizing effect, of a generally liquid fluid.
Pour la clarté de l'exposé de l'invention celui-ci s'appuira sur des exemples concernant ce dernier type de machines qui est par ticulièrement désigné pour en bénéficier. En effet les pompes cen trifuges qui mettent en mouvement des liquides variés,doivent,le plus sourent,possèder des dispositif complexes parfaitement performants pour assurer une étanchéité totale au passage de l'arbre entre l'extérieur et l'intérieur de la partie hydraulique,dont le carter ferme enveloppe au liquide véhiculé.Ces dispositifs qui réalisent l'étanchéité sont particulièrement exposés à l'usure,car leur principe repose sur le frottement entre une surface fixe et une mobile avec eu sans interposition d'un film liquide.Ils constituent donc un point particulièrement sensible de ces matériels,en- traînant la majorité des causes d'arrêt,donc d'interventions,pour remise en état. For the sake of clarity of the description of the invention, this will be based on examples concerning this latter type of machine which is particularly designated to benefit from it. Indeed the centrifugal pumps which set in motion various liquids, must, most smiles, have complex devices which are perfectly efficient to ensure a total seal at the passage of the shaft between the outside and the inside of the hydraulic part, the casing of which closes the envelope with the transported liquid. These sealing devices are particularly exposed to wear and tear, because their principle is based on the friction between a fixed surface and a moving part with no interposition of a liquid film. therefore a particularly sensitive point of these materials, leading to the majority of causes of shutdown, and therefore of interventions, for reconditioning.
Les progrès-techniques accomplis dans ce domaine se sont poursuivis dans plusieurs directions.D'une part,vers la suppression des dispositifs d'étanchéité autour de l'arbre en enfermant sous un même carter étanche l'ensemble de la partie mobile, y compris le rotor du moteur électrique qui,de ce fait,se trouve baigné par le iuide-véhiculé ( exemple: brevet françàis N024II322 ) . D'autre part,en améliorant les dispositifs d'étanchéité autour de l'arbre et leur montage, de façon à augmenter leurs performances et aussi en cherchant à simplifier les opérations de maintenance nécéssaires pour remplacer les organes défaillants. The technical progress made in this area has continued in several directions. On the one hand, towards the elimination of sealing devices around the shaft by enclosing the entire mobile part under one sealed housing, including the rotor of the electric motor which, therefore, is bathed by the iuide-conveyed (example: French patent N024II322). On the other hand, by improving the sealing devices around the shaft and their mounting, so as to increase their performance and also by seeking to simplify the maintenance operations necessary to replace the failing members.
En ce qui concerne les pompes centrifuges utilisées dans les industries pétrolière,chimique,ou alimentaire,l'évolution technologique a conduit au type représenté par la figure(l) planche(l). With regard to centrifugal pumps used in the petroleum, chemical or food industries, technological development has led to the type represented by the figure (l) plate (l).
Afin d'éviter le démontage complet de la pompe et de ses tuyauteries de raccordement,on a créé un sous-ensemble formé de la turbine(I),de l'arbre(2) et de son boitier de guidage (3) qui est assemblé avec l'arrière du carter hydraulique(4) eù est assujetti le dispositif d'étanchéité(5). Malgré cette simplification on censtate qu'il faut déplacer un ensemble important pour intervenir sur le dispositii(5) ce qui entraine des dépenses et des temps d'immobilisation consé- quents. Par allieurs il faut un accouplement allongé avec entretoise (6)entre le moteur et la pompe afin de disposer du recul nécessaire aux opérations de démontage.Cet accouplement imparfaitement aligne peut être la source de vibrations néfastes à la bonne tenue des pies ces mécaniques,dont le dispositif d'étanchéité(5).In order to avoid complete disassembly of the pump and its connection pipes, a sub-assembly was created consisting of the turbine (I), the shaft (2) and its guide box (3) which is assembled with the rear of the hydraulic casing (4) to which the sealing device (5) is secured. Despite this simplification, we realize that a large group must be moved to intervene on the device (5), which results in expenditure and consequent downtime. For alliers, you need an elongated coupling with spacer (6) between the motor and the pump in order to have the necessary recoil for dismantling operations. This imperfectly aligned coupling can be the source of vibrations harmful to the good performance of these mechanical parts, including the sealing device (5).
L'amélioration technologique proposée a pour objectif prsnc- pal de simplifier les interventions permettant le remplacement @e l'organe d'étanchéité(5) et éventuellement de l'arbre,en réquisant le nombre et la complexîté,donc la durée, des opérations a sur la machine.Elle doit conduire aussi a moins d'erreur de donc à un meilleur service du matériel Latechnologie proposée esi représentée sur la figure(2)planche(I).Elle se caractérise pa.. le fait que,premièrement, l'arbre(2)qui supporte tar@@@@ est centré et maintenu radialement et axielement dans un rotor @reux(3)monté sur des paliers(4)et que secondement,l'arbre(2)peut entre, a l'arrêt, désolidarisé de son guide @reux(3)pour @@@voir le déplacer axialement de l'amplitude nécéssaire et suffisante @@@@ libèrer l'organe @'étan chéité(5) qui étant de forme annulaire, comme représenté figure(2) planche (2) est,sans cette opération pris@@nier de cet arbre(2). On peut aussi remplacer l'arbre @@@-même. The main technological improvement proposed is to simplify the interventions allowing replacement of the sealing member (5) and possibly of the shaft, by requiring the number and the complexity, therefore the duration, of the operations. a on the machine. It should also lead to less error therefore to better service of the equipment. The technology proposed is represented in FIG. (2) plate (I). It is characterized by the fact that, firstly, the 'shaft (2) which supports tar @@@@ is centered and held radially and axially in a @reux rotor (3) mounted on bearings (4) and that secondly, the shaft (2) can enter, at the stop, disconnected from its guide @reux (3) to @@@ see it move axially of the necessary and sufficient amplitude @@@@ release the body @ 'seal (5) which is of annular shape, as shown in figure (2) board (2) is, without this operation taken @@ deny of this tree (2). You can also replace the @@@ tree - itself.
Selon l'un des modes de réalisation proposé figure(2) planche (I) l'arbre(2) est centré aux deux extré@ @@@ @@ @on @@@@@@ @@@@ lequel reçoit le couple nécéssaire à l'entrainement de l'enaele rotatif par un systeme de poulie-courroie(7). La turbine(l) est maintenue axialement sur l'arbre(2) par une tige centrale(8)vissée vissée sur celle-ci et traversant l'arbre(2)et entrainée radialement par un carré mâle-femelle en(13). L'arbre(2)est bloqué axial lement sur son guide(3)par un écrou(9) vissé en bout de celui-ci et radialement par une clavette(10). According to one of the embodiments proposed in figure (2) board (I) the shaft (2) is centered at the two ends @ @@@ @@ @on @@@@@@@@@@@ which receives the couple necessary for driving the rotary drive by a pulley-belt system (7). The turbine (l) is held axially on the shaft (2) by a central rod (8) screwed screwed thereon and passing through the shaft (2) and driven radially by a male-female square at (13). The shaft (2) is locked axially on its guide (3) by a nut (9) screwed at the end of the latter and radially by a key (10).
Les opérations pour remplacer tout ou partie de ltorgane d'étanchéité(5)sont les suivantes:L'ensemble rotatif étant immobilisé en rotation,on dévisse la tige(8)pour désolidariser axialement la turbine(I) de l'arbre (2). Puis on dévisse l'écrou(9) pour libèrer axialement l'arbre(Z)du rotor creux(3) L'arbre(2) peut alors être retiré en coulissant dans le rotor creux(3)et dans la douille(I4) appartenant à l'organe d'étanchéité(5)qui ainsi n'est plus prisonnier de l'arbre(2). On peut alors proceder au démontage de l'organe d'étanchéité(5)en le désolidarisant du flasque arrière(lO)en écartant les dispositifs d'assemblage (ii) accessibles par les ouvertures pratiquées dans le bâti (12).A noter la présence d'un anneau déflecteur entre la bague(I4) et le rotor (3);cet anneau peut aussi coulisser sur l'arbre,il ne gène donc pas les manoeuvres décrites ci-dessus. The operations to replace all or part of the sealing member (5) are as follows: The rotary assembly being immobilized in rotation, the rod (8) is unscrewed to axially separate the turbine (I) from the shaft (2) . Then we unscrew the nut (9) to release the shaft (Z) axially from the hollow rotor (3) The shaft (2) can then be removed by sliding in the hollow rotor (3) and in the bush (I4) belonging to the sealing member (5) which is thus no longer trapped in the shaft (2). We can then proceed to disassembly of the sealing member (5) by detaching it from the rear flange (10) by removing the assembly devices (ii) accessible by the openings made in the frame (12). presence of a deflector ring between the ring (I4) and the rotor (3); this ring can also slide on the shaft, so it does not interfere with the maneuvers described above.
Les opérations de remontage s'opèrent dans l'ordre inverse. The reassembly operations are carried out in reverse order.
On pourra noter que l'utilisation d'une bague de centrage(I5)évite le désaxage de la turbine(I)et facilite l'introduction de l'extré- mité de l'arbre(2)dans l'alésage de celle-ci. Pour le même objectif il est souhaitable que les parties mâle-femelle soient coniques.It will be noted that the use of a centering ring (I5) avoids the offset of the turbine (I) and facilitates the introduction of the end of the shaft (2) into the bore of the latter. this. For the same purpose it is desirable that the male-female parts are conical.
En adoptant les mêmes principes on peut réaliser un groupe moteur-pompe monobloc en utilisant,ainsi que représenté figure(I) planche(2)un moteur électrique(7) à rotor creux(3) tomme support de l'arbre(2?. Les opérations de démontage et de remontage pour échanger l'organe(s) sont les mêmes que précèdemment. On trouve en effet les mêmes éléments sauf que la transmition par courroies est remplacée par le moteur. By adopting the same principles, it is possible to produce a one-piece motor-pump group by using, as shown in FIG. (I) board (2) an electric motor (7) with hollow rotor (3) as a support for the shaft (2 ?. The disassembly and reassembly operations to exchange the component (s) are the same as before, as the same elements are found except that the belt drive is replaced by the motor.
On notera que ces opérations sont simplifwiées à l'extreme ce qui réduit considérablement le temps d'immobilisation de la machine. Il estpossible aussi d'utiliser des organes d'étanchéité(5) pré-assemblés et testés dont la douille intérieure(I4) sert de fourreau à l'arbre comme représenté figure(2) planche(2). Labsen ce d'accouplement axial entre le moteur et la pompe et le non démontage des organes principaux de guidage garantissent une remise en place correcte des quelques pièces déplacées ou échangées. It will be noted that these operations are simplified to the extreme, which considerably reduces the downtime of the machine. It is also possible to use pre-assembled and tested sealing members (5), the inner bushing (I4) of which serves as a sheath for the shaft as shown in figure (2) board (2). Labsen that of axial coupling between the motor and the pump and the non-disassembly of the main guide members guarantee correct replacement of the few parts moved or exchanged.
Dans la solution moteur-pompe monobloc représentée sur la figure(I) planche(2)on bénéficie d'un faible encotbrement du groupe complet et la simplification du montage,ainsi que la réduction du nombre des pièces constitutives conduisent à un prix intéressant pour le matériel installé; ceci d'autant plus que la rapidité et la sureté des interventions pour remplacer ltorgane d'étanchéité(5) et même l'arbre,peuvent inciter à ne pas monter un groupe de remplacement,ce qui se fait souvent. In the one-piece motor-pump solution represented in FIG. (I) board (2), there is a small footprint of the complete group and the simplification of the assembly, as well as the reduction in the number of component parts lead to an attractive price for the hardware installed; this all the more so since the speed and the safety of the interventions to replace the sealing member (5) and even the shaft, can encourage not to mount a replacement group, which is often done.
Sur certaines pompes centrifuges à une ou plusieurs turbines, où la tuyauterie d'aspiration se raccorde latéralement,dégageant ainsi l'axe de la turbine,il est possible d'utiliser les principes ci-dessus,l'arbre pouvant sortir d'un côté ou de l'autre selon le montage choisi.Cet arbre étant guidé par un ou deux rotor creux, dont l'un sert en plus a l'en@@ainer,et pouvant aussi traverser un ou deux organes d'étanchéité démontables selon les mêmes méthodes. On certain centrifugal pumps with one or more turbines, where the suction pipe is connected laterally, thus clearing the axis of the turbine, it is possible to use the above principles, the shaft being able to come out from one side or the other depending on the assembly chosen. This shaft being guided by one or two hollow rotor, one of which is used additionally for the purpose, and can also pass through one or two removable sealing members according to the same methods.
Claims (5)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8207289A FR2525699A1 (en) | 1982-04-26 | 1982-04-26 | Centrifugal pump with easily replaceable rotor seal - uses hollow shaft coupled to drive with detachable coupling to coaxial shaft which can be withdrawn to give seal access |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8207289A FR2525699A1 (en) | 1982-04-26 | 1982-04-26 | Centrifugal pump with easily replaceable rotor seal - uses hollow shaft coupled to drive with detachable coupling to coaxial shaft which can be withdrawn to give seal access |
Publications (1)
Publication Number | Publication Date |
---|---|
FR2525699A1 true FR2525699A1 (en) | 1983-10-28 |
Family
ID=9273474
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR8207289A Withdrawn FR2525699A1 (en) | 1982-04-26 | 1982-04-26 | Centrifugal pump with easily replaceable rotor seal - uses hollow shaft coupled to drive with detachable coupling to coaxial shaft which can be withdrawn to give seal access |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2525699A1 (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2717535A1 (en) * | 1994-03-17 | 1995-09-22 | Siebec Sa | Vertical pump. |
EP0718530A1 (en) * | 1994-12-23 | 1996-06-26 | FRIATEC-Rheinhütte GmbH & Co. | Pump unit |
ITVI20100150A1 (en) * | 2010-05-28 | 2011-11-29 | Calpeda A Spa | MULTI-STAGE CENTRIFUGAL PUMP WITH PERFECT MECHANICAL SEAL |
WO2012010514A3 (en) * | 2010-07-22 | 2012-04-12 | Siemens Aktiengesellschaft | Turbocompressor rotor and turbocompressor |
EP2113669A3 (en) * | 2008-04-28 | 2013-07-10 | Fujikoki Corporation | Drainage pump |
CN106122076A (en) * | 2016-08-24 | 2016-11-16 | 上海电气凯士比核电泵阀有限公司 | A kind of special balls roof construction end face tooth type flexible coupling |
WO2018224309A1 (en) * | 2017-06-09 | 2018-12-13 | KSB SE & Co. KGaA | Centrifugal pump for conveying hot media |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB595669A (en) * | 1942-04-27 | 1947-12-12 | Power Jets Ltd | Rotor assembly |
FR1546205A (en) * | 1967-12-01 | 1968-11-15 | Loewe Pumpenfabrik G M B H | Centrifugal motor-pump unit |
US4147468A (en) * | 1975-08-21 | 1979-04-03 | Mitsui Mining & Smelting Co., Ltd. | Impeller type pump having seal means and protective means |
-
1982
- 1982-04-26 FR FR8207289A patent/FR2525699A1/en not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB595669A (en) * | 1942-04-27 | 1947-12-12 | Power Jets Ltd | Rotor assembly |
FR1546205A (en) * | 1967-12-01 | 1968-11-15 | Loewe Pumpenfabrik G M B H | Centrifugal motor-pump unit |
US4147468A (en) * | 1975-08-21 | 1979-04-03 | Mitsui Mining & Smelting Co., Ltd. | Impeller type pump having seal means and protective means |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2717535A1 (en) * | 1994-03-17 | 1995-09-22 | Siebec Sa | Vertical pump. |
EP0718530A1 (en) * | 1994-12-23 | 1996-06-26 | FRIATEC-Rheinhütte GmbH & Co. | Pump unit |
EP2113669A3 (en) * | 2008-04-28 | 2013-07-10 | Fujikoki Corporation | Drainage pump |
ITVI20100150A1 (en) * | 2010-05-28 | 2011-11-29 | Calpeda A Spa | MULTI-STAGE CENTRIFUGAL PUMP WITH PERFECT MECHANICAL SEAL |
WO2012010514A3 (en) * | 2010-07-22 | 2012-04-12 | Siemens Aktiengesellschaft | Turbocompressor rotor and turbocompressor |
CN106122076A (en) * | 2016-08-24 | 2016-11-16 | 上海电气凯士比核电泵阀有限公司 | A kind of special balls roof construction end face tooth type flexible coupling |
WO2018224309A1 (en) * | 2017-06-09 | 2018-12-13 | KSB SE & Co. KGaA | Centrifugal pump for conveying hot media |
CN110709609A (en) * | 2017-06-09 | 2020-01-17 | Ksb股份有限公司 | Centrifugal pump for conveying a thermal medium |
CN110709609B (en) * | 2017-06-09 | 2021-03-09 | Ksb股份有限公司 | Centrifugal pump for conveying a thermal medium |
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